How do you tell if pewter has lead in it?
Answers
The best approach to determine whether a piece of pewter contains lead is to use a lead test kit from the hardware store. Here, a section of metal is swabbed with test chemicals to see if the color changes. Lead is typically indicated by pink or red kits.
Lead content in antique pewter?30 percent lead and 70 percent tin were the main components of ancient pewter. When exposed to acidic foods, this type of pewter, often known as black metal, quickly leached away its lead.
What caused the removal of lead from pewter?It's vital to remember that early pewter contained a lot of lead. Due to lead's hazardous nature, everyday or frequent use caused the chemical to leak out of the plate and spoon.
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Related Questions
Intraspecific competition has a beneficial affect due to factors such as, ____________.
A. All of these
B. Predators
C. Disease
D. Over population
Answers
Intraspecific competition has a beneficial affect due to factors such as predators, disease and overpopulation. Thus option A is correct since all the above are beneficial factors.
What is intraspecific competition?Competition is described as an interaction between two or more individuals from the same or two or more populations wherein one negatively impacts the other in access to a limited resource (or resources) (food, water, nesting places, shelter, mates, etc.). Intraspecific competition occurs when individuals from the same species (cospecifics) compete. The impact of competition on each individual within the species is determined by the sort of competition that occurs. When a species competes for a finite resource, all individuals eat equal quantities until the supply is gone, all members of that population may die of starvation. On the other hand, when one individual competes and wins over a resource, and that resource is exploited, it continues to exist.
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Consider this initial-rate data at a certain temperature for the reaction described by
2NO2(g) + O3 (g) ----> N2O5 (g) +O2 (g)
[NO2]0 (M) [O3]0 (M) Initial rate (M/s)
0.65 0.8 2.47 x 104
1.1 0.8 4.18 x 104
1.76 1.4 11.70 x 104
*(the second column values are 0.8, 0.8, and 1.4. they are running into the other column).
Determine the value and units of the rate constant.
Answers
Take into account these initial-rate measurements for the reaction given by K has a value of 6.6 s-1.
In eleventh-grade chemistry, what is a reaction?Chemical Response: Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
A physical reaction is what?A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. The definition of a physical reaction is a response in which molecules rearrange one another but do not undergo chemical change.
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Consider these observations of the starting rate for the reaction for which K gives a score of 6.6 s-1.
In eleventh-grade chemistry, what is a reaction?Chemical Reaction: Chemical reactions are now the mechanisms by which a material or substances undergo chemical modification to produce a new substance or compounds with wholly new properties. Products are wholly different from reactants in nature and identity.
A physical reaction is what?A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. A physical reaction is defined as an action in which ions rearrange one another without experiencing a chemical change.
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the basic principles of atomic theory were first conceived by:
Answers
The ancient atomic theory was proposed in the 5th century bc by the Greek philosophers Leucippus and Democritus and was revived in the 1st century bc by the Roman philosopher and poet Lucretius.
1st Define Covalent bond and it's type
2nd What would be the electron dot structure of carbon dioxide which has the formula CO2.
3rd what would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur?
Answers
Answer:
COVELENT BOND:-The chemical bond formed by the sharing of an electron pair between two atoms so that both the atoms get their octet complete is called covalent bondSINGLE COVELENT BOND:-it is formed by sharing of one pair of electron between two atomsDOUBLE COVELENT BOND:-it is formed by sharing of two pair of electron between two atomsTRIPLE COVELENT BOND:- it us formed by sharing of three pair of electron beyween two atoms2)Electron dot structures of carbon dioxide:-Oxygen atom contains 6 valence electrons which form 2 lone pairs. Since it is bonded to only one carbon atom, it must form a double bond. Carbon atom contains four valence electrons, resulting in zero lone pairs. Therefore, it is doubly bonded to each oxygen atom.
3))Sulfur has an atomic number is 16 with the
symbol as 'S'
The electronic configuration of sulfur is said to be 2,8,6The valence electrons present in sulfur is 6.Sulfur forms an octet structure by connecting 8 sulfur atoms with each other by the formation of single covalent bonds.The sulfur molecule's chemical formula is S8.Sulfur is usually used in the manufacture of sulphuric acid.Explanation:
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A covalent bond is a type of bond that is typically characterized by sharing of electrons between the atoms of a non-metallic chemical element.
What is a covalent bond?
A covalent bond can be defined as a type of bond that exists in chemical compounds, and it is typically characterized by sharing of electrons between the atoms of a non-metallic chemical element.
The types of covalent bond.In Chemistry, there are two (2) main types of covalent bond and these include:
Polar covalent bondNon-polar covalent bondThe carbon atoms of carbon dioxide (\(CO_2\)) has four valence electrons and the oxygen atoms has six valence electrons. Thus, electron dot structure of carbon dioxide represents a double covalent bond.
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The diagram shows the cycling of matter in the interior of Earth.
Which statement correctly explains the cycling of matter in the interior of Earth?
Responses
The heat from Earth’s core causes material in the area under the crust to become less dense and rise, while more dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become less dense and rise, while more dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become more dense and rise, while less dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become more dense and rise, while less dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become less dense and sink, while more dense material rises.
The heat from Earth’s core causes material in the area under the crust to become less dense and sink, while more dense material rises.
The heat from Earth’s core causes material in the area under the crust to become more dense and sink, while less dense material rises.
The heat from Earth’s core causes material in the area under the crust to become more dense and sink, while less dense material rises.
Answers
Answer:
Explanation:
I think 'The heat from Earth's core causes material in the area under the crust to become denser and rinse, while less dense material sinks.
Why are there airlock on Mars and how do you think they work
Answers
Answer:
to protect astronauts from dieing from no air or presurre
Explanation:
How many formula units are contained in 63.0 gof CaCl2?Select the correct answer below:A. 3.42 × 1023B. 3.54 × 1023 formula unitsC. 1.75 × 1023 formula unitsD. 3.19 × 1023 formula units
Answers
A. 3.42 × 1023. formula units are contained in 63.0 gof CaCl2 Is 3.42 × 1023.
How many formula units are there, exactly?The Avogadro number, or 6.0231023 6.023 10 23, is multiplied by the moles of a given substance to produce the formula units.
How many moles of cacl2 are there in a formula unit?Avogadro's constant comes to mind when thinking about formula units; you need 6.0221023 of them to produce exactly 1 mole of the an ionic compound.In this instance, you are aware that exactly 1 mole ion calcium chloride requires 6.0221023 formula units of the compound.
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What would the products be when aluminum chloride (which contains Al3+ and Cl- ions) is melted and electrolyzed? Write half equations to show what goes on at each electrode.
Answers
The product of electrolysis : Al at cathode and Cl₂(chlorine) at anode
Further explanationGiven
Aluminum chloride compound
Required
The product of electrolysis
Solution
The rule :
The reaction at the cathode(the negative pole) :
1. the reduced active metal is water, other than that the metal will be reduced
2. H⁺ of the acid will be reduced
The reaction at the anode((the positive pole) :
1. if the electrodes are not inert then the metal is oxidized
2. If inert then:
a. OH⁻ from the base will be oxidized
b. The halogen metal will oxidize
In the electrolysis of molten AlCl₃ with an inert electrode, the cation will be reduced at the cathode and the anion will be oxidized at the anode
Cathode : Al³⁺ + 3e⁻ ⇒ Al(s)
Anode : 2Cl⁻⇒Cl₂(g) + 2e⁻
Select the correct answer. Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes a sip to discover that the water tastes salty. What kind of change has occurred? OA It's a chemical reaction because a new substance has formed. O B. It's a physical change because the water and the salt kept their original properties. O C. It's an example of synthesis because two substances reacted to give one substance. O D. It's a chemical reaction because the water now tastes salty but originally did not.
HELLLPPPP PLEASEEEEE!!!!!
Answers
Answer:
B. It's a physical change because the water and the salt kept their original properties.
Explanation:
Even though it tastes like salty water, the salt is still present, just in smaller molecules. It can be brought back so it is a physical change.
:
1. The planned value for a project is US$17,800, the earned value is US$19,450, and the actual cost is US$21,870. Based on this information, calculate the cost performance index and the schedule performance index. What do these indices tell you about the status of the project in terms of cost and schedule
Answers
The cost performance index (CPI) for the project is 0.89, and the schedule performance index (SPI) is 1.09. These indices indicate that the project is behind schedule but slightly under budget.
The CPI is calculated by dividing the earned value (EV) by the actual cost (AC). In this case, EV is $19,450 and AC is $21,870, resulting in a CPI of 0.89. A CPI less than 1 indicates that the project is over budget. However, since the CPI is close to 1, it suggests that the project is slightly under budget.
The SPI is calculated by dividing the EV by the planned value (PV). With an EV of $19,450 and a PV of $17,800, the SPI is 1.09. An SPI greater than 1 indicates that the project is ahead of schedule. In this case, the SPI value indicates that the project is slightly behind schedule.
Overall, the project is performing slightly better in terms of cost management than in schedule management. The project is under budget but slightly behind schedule. Further analysis and corrective actions may be required to improve the project's schedule performance.
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HELP PLEASE!!!
Is it true that if you compared the frequencies of UV light and visible light, you'd find that the UV light had a minor frequency?
Answers
In summary, ultraviolet light moves at the same speed as visible light. It also travels as the same speed of infrared light, radio waves, microwaves, x-rays, and gamma rays.
How do you calculate pH from KOH?
Answers
To calculate the pH from KOH, you need to first determine the concentration of the hydroxide ion (OH-) in the solution.
This can be done by using the equation:
[OH-] = [KOH]
Once you have the concentration of the hydroxide ion, you can use the equation:
pOH = -log[OH-]
to find the pOH of the solution. Finally, you can use the equation:
pH = 14 - pOH
to find the pH of the solution.
Here is a step-by-step explanation:
1. Determine the concentration of the hydroxide ion (OH-) in the solution by using the equation:
[OH-] = [KOH]
2. Use the equation:
pOH = -log[OH-]
to find the pOH of the solution.
3. Use the equation:
pH = 14 - pOH
to find the pH of the solution.
By following these steps, you can calculate the pH from KOH.
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1. Consider NH3.If it dissolves in water(i) NH3 + H20 + NHẤ4+ H2O(ii)NH3 + H2O → NH+3 + OH-(iii) NH3 + H2O + NH+4+ OH-(iv) NH3 + H2O → NH+4+ OH-Which represents the dissolution of NH3 in water(a) i(b) ii (c) iii (d) iv (e) iii and iv2. HOA2+H20 . → H3O+ + OA-CIn this reaction:(i) OA c is the conjugate base of H2O(ii)OA-c is the conjugate base of HOAc (iii) H3O+ is theсconjugate base of HOA.(iv) H3O+ is the conjugate acid of H2O(a) i(b) ii (c) iii (d) iv (e) none3. Arrange the following according to increasing acid strength(i) Ka= 2.5 + 10-15(ii) Ka= 9.0 + 10-9(iii) pKa= 7.5(iv) % dissociation =100(a) iv, iii, ii, i2(b) ii, I, iii, iv(c) i, iii, iv, ii(d) i, ii, iii, iv(e) iii, iv, ii, i2
Answers
1. Ammonia is a colorless gas with a chemical formula of NH3, when it comes in contact with water, it will be transformed into Ammonium ion and it will produce one hydroxide ion, and this is why Ammonia will present a more basic (pH) behavior, the reaction that represents this behavior is:
NH3 + H2O -> NH4+ + OH-
Number 4 is the only one that represents it well
Number 3 has the same reaction but since there is a plus sign instead of an arrow, I consider it wrong.
How many moles of carbon dioxide can be produced when 3.05 moles of calcium carbonate are heated?
Answers
0.0305mol of carbon dioxide can be produced when 3.05 mole of calcium carbonate are heated.
What is carbon dioxide?Carbon dioxide is a chemically compound made up of molecules that each one have one carbon atomclick covalently double bonded to two oxygen atoms. It is founded in the gas state at room temperature. In the air, carbon dioxide is to the transparent to visible light of the but absorbs infra-red by radiation, acting as the greenhouse gas.
CaCO3 ---> CaO + CO2
Mass of CaCO3 mol = 40 + 12 + (16 x 3) = 100g/mol
Number of CaCO3 moles heated = 3.05/100 = 0.0305 mol
One CaCO3 mol produces 1 mol CO2
Therefore 0.0305mol of CO2 produced.
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If 252 grams of iron are reacted with 321 grams of chlorine gas, how many grams of alcl3 are produced by this reaction?
Answers
If 252 grams of iron are reacted with 321 grams of chlorine gas, then 601.98 grams grams of alcl3 are produced by this reaction.
When 252 grams of iron react with 321 grams of chlorine gas, the reaction produces a certain amount of AlCl3. To determine the grams of AlCl3 produced, we need to calculate the stoichiometric ratio between iron and AlCl3 in the balanced chemical equation and use it to convert the given mass of iron to grams of AlCl3.
To perform the calculations, we need the molar masses of iron (Fe), chlorine gas (Cl2), and aluminum chloride (AlCl3).
Molar mass of Fe = 55.85 g/mol
Molar mass of Cl2 = 70.91 g/mol
Molar mass of AlCl3 = 133.34 g/mol
Step 1:
Moles of Fe = 252 g / 55.85 g/mol = 4.51 mol
Moles of Cl2 = 321 g / 70.91 g/mol = 4.53 mol
Step 2:
Since the moles of Fe and Cl2 are very close, we will consider Fe as the limiting reactant.
Step 3:
Moles of AlCl3 = Moles of Fe * (2 moles of AlCl3 / 2 moles of Fe) = 4.51 mol
Step 4:
Mass of AlCl3 = Moles of AlCl3 * Molar mass of AlCl3
Mass of AlCl3 = 4.51 mol * 133.34 g/mol = 601.98 g
Therefore, by reacting 252 grams of iron with 321 grams of chlorine gas, the reaction will produce approximately 601.98 grams of aluminum chloride (AlCl3).
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how to tell if something is more soluble in solubility curve
Answers
Answer:
To find the least soluble substance at a given temperature we follow the temperature line up and the first substance curve we hit is the least soluble. For most soluble it is the same procedure except the last substance curve hit is the most soluble.
To determine if a substance is more soluble or less soluble based on a solubility curve, you need to compare the solubility values at different temperatures. Here's how you can interpret a solubility curve:
1. Higher Points on the Curve: If a point on the curve is higher, it indicates that the substance is more soluble at that temperature. In other words, at higher temperatures, the substance can dissolve in a greater amount.
2. Lower Points on the Curve: If a point on the curve is lower, it means that the substance is less soluble at that temperature. In this case, at lower temperatures, the substance can dissolve in a smaller amount.
3. Comparing Points: By comparing the solubility values at different temperatures, you can determine which temperature has a higher solubility and which has a lower solubility. The steeper the slope of the curve, the faster the increase or decrease in solubility with temperature.
Solubility curves provide a graphical representation of the relationship between temperature and solubility. They allow you to determine the solubility characteristics of a substance and how it changes with temperature.
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What is the % of each element in Ni3{PO4) 2 ?
Answers
Answer:
nickel 48.1063%
Phosphorus 16.9245%
Oxygen 34.9692%
The percent composition of each element like nitrogen, oxygen and phosphorous in Ni₃(PO₄)₂ are 48.03%, 34.97% and 16.93% respectively.
How do we calculate % composition?Percent composition of any element present in any compound will be calculated as:
% comosition = (Mass of element / Mass of compound)×100%
Mass of Ni₃(PO₄)₂ compound = 366.02 g/mol
Molar mass of 3 Nitrogen atoms = 3×58.6 = 175.8 g/mol
Moar mass of 2 Phosphorous atoms = 2×31 = 62 g/mol
Moar mass of 8 Oxygen atoms = 8×16 = 128 g/mol
% comosition of Nitrogen = (175.8/366.02)×100% = 48.03%
% comosition of Oxygen = (128/366.02)×100% = 34.97%
% comosition of Phosphorous = (62/366.02)×100% = 16.93%
Hence % composition of nitrogen, oxygen and phosphorous is 48.03%, 34.97% and 16.93% respectively.
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Which is the stereochemical relationship between this pair of molecules?.
Answers
Answer:
enantiomers
Explanation:
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How does a nucleus maintain its stability even though it is composed of many particles that are positively charged? The neutrons shield these protons from each other. The Coulomb force is not applicable inside the nucleus. The strong nuclear forces are overcoming the repulsion. The surrounding electrons neutralize the protons.
Answers
A nucleus maintains its stability despite being composed of positively charged particles due to the strong nuclear force that overcomes the repulsion between the protons.
The neutrons in the nucleus play a crucial role in maintaining stability. Neutrons have no charge and do not contribute to the electrostatic repulsion. Their presence helps to increase the attractive nuclear force, balancing the repulsive force between protons. This shielding effect allows the nucleus to remain stable.
Another important factor is that the Coulomb force, which describes the electrostatic repulsion between charged particles, is not applicable at the nuclear level. The range of the Coulomb force is limited, and its influence diminishes at very short distances inside the nucleus. Instead, the strong nuclear force takes over and becomes the dominant force, binding the protons and neutrons together.
Additionally, the surrounding electrons in an atom contribute to the nucleus's stability. Electrons are negatively charged and are located in the electron cloud surrounding the nucleus. Their negative charge helps neutralize the positive charge of the protons, reducing the overall electrostatic repulsion within the atom. This electron-proton attraction further contributes to the stability of the nucleus.
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PLSSS HELP !! In the wintertime, you decide to buy a helium balloon at Dollar Tree. It is fully
inflated in the store. However, when you walk outside in the cold, the balloon
deflates quite a bit. So, you go back into the store, to exchange it for a different
balloon. But once you walk back into the warm store, the balloon is fully inflated!
Why does the balloon deflate outside in the cold winter weather and inflate inside
the warm store? Which gas law, (Charles, Boyle, Guy-Lussacs law) causes this to
happen?
Answers
The balloon inflated indoors after deflating outdoors in the chilly winter weather due to Charles law.
A rule that says the volume of a perfect gas at constant pressure is inversely correlated with the absolute temperature.
The balloon contracts as a result of the helium becoming denser than before as the temperature drops. In order to preserve heat, the helium molecules lose energy, slow down, and migrate closer together. As a result, the volume within the balloon reduces since they are moving closer together rather than outward toward the balloon's shell, which would cause the balloon to expand and subsequently contract. The Charles law is the gas law that makes this happen.
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how is energy transfered from one piece of metal to another
Answers
Answer:
The positive and negative electrons attract leaving a shock and heat travels faster through metal than any other material such as plastic, wood, etc.
Explanation:
Answer:
The electrons in a piece of metal can leave their atoms and move about in the metal as free electrons. ... The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons.
Explanation:
what mass of agc2h3o2 (ksp = 2.0 x 10-3) will dissolve in 250 ml of 0.150 m ca(c2h3o2)2?
Answers
The mass of AgC₂H₃O₂ that will dissolve in 250 mL of 0.150 M Ca(C₂H₃O₂)₂ can be determined using the solubility product constant (Ksp) and stoichiometry.
To calculate the mass of AgC₂H₃O₂ that will dissolve, we need to consider the reaction between AgC₂H₃O₂ and Ca(C₂H₃O₂)₂, which can be represented as:
AgC₂H₃O₂ (s) ⇌ Ag⁺ (aq) + 2C₂H₃O₂⁻ (aq)
Given the solubility product constant (Ksp) of AgC₂H₃O₂ as 2.0 x 10⁻³, we can set up an equilibrium expression:
Ksp = [Ag⁺][C₂H₃O₂⁻]²
Since the concentration of Ca(C₂H₃O₂)₂ is 0.150 M, we assume that the concentration of C₂H₃O₂⁻ from the dissociation of Ca(C₂H₃O₂)₂ is also 0.150 M.
To find the concentration of Ag⁺, we need to consider that AgC₂H₃O₂ dissolves according to a 1:1 stoichiometric ratio. This means that if x represents the concentration of Ag⁺, then the concentration of C₂H₃O₂⁻ will be 2x.
Substituting these values into the equilibrium expression, we get:
2.0 x 10⁻³ = x * (2x)²
Solving this equation will give us the value of x, which represents the concentration of Ag⁺. Once we have the concentration, we can use it to calculate the mass of AgC₂H₃O₂ that will dissolve in 250 mL (0.250 L) of the solution using the molarity and volume information.
By following these steps, we can determine the mass of AgC₂H₃O₂ that will dissolve in the given solution.
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The blanks and bottom part please!
Thank you in advance
Answers
The complete sentences are:
When all the intermolecular bonds are broken, the transition between phases is complete.The energy of any substance includes the kinetic energy of its particles and the potential energy of the bonds between its particles.What are the complete sentences on matter?Page 3:
The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.
The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.
The complete sentences:
Water stays in a liquid state as the temperature and kinetic energy of the molecules increase from 0°C to 100°C. This consistency indicates that a larger amount of energy is necessary to break the intermolecular forces and change the state of matter. At the melting and boiling points, the temperature does not change because all of the energy is being used to break the intermolecular forces.The energy needed to overcome all the intermolecular forces between molecules must be greater than the potential energy of the bonds between molecules.The transition between phases is a physical change, not a chemical change.Page 4:
Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.
Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.
Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.
A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.
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Air Mass Interactions Quick Check
Question
Use the table to answer the question.
Day Observations
1 sunny and warm
2 cloudy and rainy
3 drop in temperature
4 clear skies and cold temperatures
A student tracks the daily weather. The student’s observations are logged in the table. Which factor in the atmosphere best explains the student’s observations?
(1 point)
A warm air mass replaced a cold air mass.
A warm air mass replaced a cold air mass.
A cold front moved into the area.
A cold front moved into the area.
High levels of moisture are contained within an air mass.
High levels of moisture are contained within an air mass.
A warm front moved into the area.
A warm front moved into the area.
Skip to navigation
Answers
The true factor in the atmosphere which perfectly explains the student’s observations is: High levels of moisture are contained within an air mass. This goes to say clearly that a very high humidity concentration in the air mass account for the best factor in the atmosphere in the student's observations
Air massAn air mass is a huge body of air in the lower atmosphere that has similar temperature, humidity, and air pressure at given height
Air mass interactionWhen two different air masses come into contact together, they don't mix. Rather, they push against each other along a line called a front. When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses.
HumidityHumidity is the amount of water vapor in the air. Ofcourse, if there is a lot of water vapor in the air, the humidity will be high as well.
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Answer:
1. A 2.B
Explanation:
air mass and warmer will replace colder
sorry if this is not enough answers or answers dont match ur quick check
Will someone please help me with these physics questions.
Now assume that all of the potential energy went into kinetic right as it is about to hit the bottom. What would be the value for the kinetic energy? a. less
b. same
c. more
d. not information
Answers
The potential energy will go into kinetic right as it is about to hit the bottom. Then, the value will be the b) same for the kinetic energy.
When an object falls, its potential energy decreases, and its kinetic energy increases. A decrease in the potential energy is exactly the same as an increase in the kinetic energy. According to the law of conservation of energy, just before the lamp stops, the potential energy at the top of the lamp and the kinetic energy at the bottom must be equal. At the foot of the hill, the potential energy is zero and the final energy is all kinetic energy. We can equate these two values according to the law of conservation of energy. Adding the kinetic energy and the potential energy gives a constant (KE+PE=constant).
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Please help I don't understand this question
Answers
Niagara Falls is a set of very large waterfalls located on the border between New York and Ontario, Canada. Over 200,000 cubic feet of fast-moving water falls approximately 180 feet every second. Water at the top of the Falls possesses kinetic energy and gravitational potential energy.
Option B is correct.
What is kinetic energy?Kinetic energy of an object is the energy that it possesses due to its motion which is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
In the case of water at the top of a waterfall, the water has kinetic energy due to its movement as it falls from the height. The velocity of the water increases as it falls, and the kinetic energy increases proportionally.
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Consider the balanced equation below.
2H2S + 3O2 Right arrow. 2SO2 + 2H2O
Which option gives the correct mole ratios?
H2S:SO2 = 2:2 and O2:H2O = 3:2
H2S:SO2 = 2:3 and O2:H2O = 3:2
H2S:SO2 = 4:4 and O2:H2O = 5:4
H2S:SO2 = 4:6 and O2:H2O = 4:4
Answers
Answer:
4:6 and 4:4
Explanation:
double the right side so double the left side to get these ratios
Metallic minerals are consumed in _______ amounts than nonmetallic minerals and materials. group of answer choices
Answers
Calculate The Theoretical Mass Percent Of Barium In BaCl2.2H20.
Answers
The hypothetical mass fraction of barium would be 22% if we divided the mass of the elements in 1 mole of the mixture by the complex's molar mass and multiplied the result by 100.
What impacts the body does barium have?Radiopaque contrast media are a family of drugs that includes barium sulfate. It functions by coating the throat, stomach, or colon with a substance that does not absorbed by the human body so that sick or damaged portions may be plainly seen by an x-ray or CT scan.
Is barium bad for people?Barium chemicals that dissolve in the water or the stomach when consumed in very high quantities might cause human paralysis or heart rhythm abnormalities.
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1. Name the elements with the following symbols
a. Na
b. H
c. C
d. O
2. What is the symbol for the following elements?
a. Helium
b. Sulfur
c. Copper
d. Lead
Answers
Answer:
1.
a. Sodium
b.Hydrogen
c Carbon
d Oxygen
2.
a He
b S
c Cu
d Pb
Answer:
1.
a. Sodium
b.Hydrogen
c Carbon
d Oxygen
2.
a He
b S
c Cu
d Pb
Explanation:
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