1) Conversion Factors: 1 package = 10 oz
How many packages(pkgs) are in 10 ounces (oz) of marshmallows (mm)? 1 pky
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Do all systems have Inputs and Outputs? I’m sorry I’m really dumb
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HURRYY!!! WORTH 25pts. How many moles of a gas will be needed to fill a 42 liter container at 370 K and 9.16 atmospheres?
PV=nRT
R = 0.0821
Answers
Answer:
12.665 mols
Explanation:
You can just plug into the equation finding n, which is moles. The equation would be n = PV/RT. atm is 9.16, Volume is 42, 0.08206 or 0.0821 in this case is the constant, and T is the temperature which is 370 Kelvin.
What is the electron configuration when the valence electrons are removed from each of the elements listed in the chart?
A.1s22s22p63s2
B.1s22s22p6
C.1s22s2
D.1s22s22p63s1
Answers
Answer:
A. 1s²2s²
B. 1s²
C. 1s²
D. 1s²2s²2p⁶
Explanation:
The valency electron is the outer electron of an element. The valency electron resides in the outermost region of the shell.
Using the general configuration for the first 20 elements 2 8 8 2 the valency electrons can be identified.
A. 1s²2s²2p⁶3s² . The valency electron here are 2p⁶ and 3s² . Removing the valency electron we have 1s²2s²
B. 1s² 2s² 2p⁶. After removing the valency electron the configuration will be 1s².
C.1s²2s². After removing the valency electron the configuration will be 1s²
D.1s²2s²2p⁶3s¹. Removing the valency electron the electron configuration will be 1s²2s²2p⁶
question at position 1 sand is mostly composed of small particles of silicon dioxide. to what materials class would you classify sand?
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Sand is absolutely composed of small particles of silicon dioxide. Sand can be classified as ceramics.
The silicon dioxide is a compound. It is an oxide of Silicon. The oxide are formed by the reaction of an element with the oxygen. In silicon dioxide, the silicon reacts with two oxygen molecule to form silicon dioxide. So, the two elements present in the silicon dioxide would be silicon and oxygen.
Ceramics can be defined as inorganic non-metallic materials which harden at high temperatures. The atomic structure of ceramics can be crystalline, non-crystalline, or semi-crystalline. However, most ceramics have a crystalline atomic structure.
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Where is the youngest rock in the Atlantic Ocean found?
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Answer:
oceanic ridge
The youngest rocks on the ocean floor are located at the oceanic ridge, an underwater mountain range formed from the spreading of tectonic plates in.
Explanation:
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The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch
and carotid arteries. These send impulses to either the cardioaccelerator or
cardioinhibitor center in the hypothalamus of the brain, which in turn sends an
impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a
feedback diagram to illustrate what happens to restore homeostasis when blood CO2
rises.
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Answer:
The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch
and carotid arteries. These send impulses to either the cardioaccelerator or
cardioinhibitor center in the hypothalamus of the brain, which in turn sends an
impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a
feedback diagram to illustrate what happens to restore homeostasis when blood CO2
rises.
Explanation:
The level of CO2 in the blood is detected by chemoreceptors located in the aortic arch
and carotid arteries. These send impulses to either the cardioaccelerator or
cardioinhibitor center in the hypothalamus of the brain, which in turn sends an
impulse to the pacemaker of the heart to increase or decrease heart rate. Draw a
feedback diagram to illustrate what happens to restore homeostasis when blood CO2
rises.
what are the steps from dalton's atomic theory to stoichiometry?
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Answer:
Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.
How many resonance forms are possible for the formate ion? formate ion is choo−.
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The number of resonance structures that accrue to the formate ion are two resonance structures.
What is resonance?The term resonance has to do with a situation in which a single resonance structure is unable to fully explain the properties of a compound. In that case, we would need to invoke the use of more than one resonance structures.
In the case of the formate ion, there are two such resonance structures that can be employed to be able to obtain the properties of the chemical specie. These two resonance structures are shown in the image attached.
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Match up the characteristics below with the type of molecular bond they describe. Bonds found in Halite (between Na+ and Cl-) Bonds found between Si and O in the Si-O tetrahedron Bonds inside the water molecule (between the H and O ) Bonds that exist between two water molecules Strongest bond type Weakest bond type Bonds that are used by water to dissolve sal
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The characteristics and the type of molecular bond they describe:
1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond
2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond
3. Bonds inside the water molecule (between the H and O): Covalent bond
4. Bonds that exist between two water molecules: Hydrogen bond
5. Strongest bond type: Covalent bond
6. Weakest bond type: Van der Waals bond
7. Bonds that are used by water to dissolve salt: Ionic bond
The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.
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For the balanced equation shown below, how many grams of CO2 will be
produced from 74.23 grams of CO? CO + Fe3O4 → 3FeO + CO2
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Answer:
116.64 g
Explanation:
74.23÷14 This is # of moles .
# of moles for co = 5.302
Then mass of co2 = 116.64
How many mole of HCL is produced if 4g of hydrogen is completely reacted with chlorine
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Answer:
4 moles of HCl are produced.
Explanation:
Given data:
Mass of hydrogen = 4 g
Number of moles of HCl = ?
Solution:
H₂ + Cl₂ → 2HCl
Number of moles of hydrogen:
Number of moles = mass/molar mass
Number of moles = 4 g/2 g/mol
Number of moles = 2 mol
now we will compare the moles of hydrogen and HCl.
H₂ : HCl
1 : 2
2 : 2/1×2 = 4 mol
Thus, 4 moles of HCl are produced.
In this equation, what does n represent?
OA number of electrons in the cell
OB number of electrons in the reactants
OC number of moles of electrons transferred
OD number of products in the equation
OE number of reactants in the quotient
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Answer:
the number of electrons in the cell
Which of the following items is the best macroscopic analogy of the quantum mechanical model of the atom?
A.
a swarm of bees surrounding an enemy insect
B.
a golf ball at rest on the ground
C.
a loaf of cinnamon raisin bread expanding in an oven
D.
the Moon orbiting the Earth in a regular period
Answers
Answer:
A
Explanation:
Select the statement which does not apply to an ideal gas. Group of answer choices The average kinetic energy of the ideal gas molecules is proportional to the absolute temperature. The volume occupied by ideal gas molecules is negligible compared to the container volume. Ideal gases behave most ideally at high pressures and low temperatures. There are no attractive forces between the ideal gas molecules. An ideal gas behaves according to the ideal gas equation of state, which is a combination of Boyle's, Charles', and Avogadro's laws.
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The statement which does not apply to an ideal gas is: Ideal gases behave most ideally at high pressures and low temperatures. Ideal gases are theoretical gases that follow certain assumptions and laws. An ideal gas is a gas that obeys Boyle's law, Charles's law, and the Avogadro ideal gas laws regardless of the chemical nature of the gas.
It is an idealized concept because no gas strictly obeys these laws; however, they are excellent approximations to the behavior of actual gases. The following statements apply to an ideal gas: The volume occupied by ideal gas molecules is negligible compared to the container volume. There are no attractive forces between the ideal gas molecules. The average kinetic energy of the ideal gas molecules is proportional to the absolute temperature. An ideal gas behaves according to the ideal gas equation of state, which is a combination of Boyle's, Charles', and Avogadro's laws.
An ideal gas is a gas that is composed of a large number of molecules that are always in random motion. These molecules collide with each other and the walls of the container that encloses the gas. The volume of the gas is essentially the volume of the container since the volume of the gas molecules is negligible compared to the container volume.There are no attractive or repulsive forces between the ideal gas molecules. This implies that the collisions between the molecules are perfectly elastic and that the energy is conserved during these collisions. The temperature of an ideal gas is proportional to the average kinetic energy of the gas molecules, which is the same for all gases regardless of their mass or chemical properties.The ideal gas equation of state, which is PV = nRT, is a combination of Boyle's, Charles', and Avogadro's laws. These laws describe the relationship between the pressure, volume, temperature, and number of gas molecules in an ideal gas system. Thus, an ideal gas follows certain laws and assumptions.
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What is the charge of an atom if it loses 3 electrons?.
Answers
If an atom loses 3 electrons, it will gain a charge of +3.
Explanation:
Electrons are negatively charged. So, if an atom loses electrons, they lose the negative charges, thus becoming more positive. Depending on the atom’s current charge, you would add 3 to it to determine its final charge after losing 3 electrons.
how can animal fossils help us understand the earth
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Answer:
Some animals and plant are only known to us as fossils. hope this helps. and have a nice day:)
if the box weighs 1 500 n how much does the force of gravity do on the box
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The force of gravity acting on the box is 1,500 N or 152.7 kg.
Force of gravity is the force that attracts two objects towards each other. The force of gravity acting on an object is directly proportional to its mass and inversely proportional to the square of the distance between the object and the center of the Earth.
The force of gravity can be calculated using the formula
Fg = mg,
where Fg is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity,
which is approximately 9.81 m/s2 near the surface of the Earth.
If the box weighs 1,500 N, then the force of gravity acting on the box would be
Fg = mg
= (1,500 N)/(9.81 m/s2)
= 152.7 kg.
Therefore, the force of gravity acting on the box is 1,500 N or 152.7 kg.
The force of gravity is an important concept in physics, as it affects everything on Earth. The gravitational force between two objects depends on their masses and the distance between them. The more massive the objects are, the greater the force of gravity between them. Similarly, the closer two objects are, the greater the force of gravity between them.
The force of gravity is also responsible for keeping the planets in orbit around the Sun and the Moon in orbit around the Earth. It is a fundamental force of nature that plays a crucial role in our understanding of the universe.
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Calculate the amount of solid NH4Cl to add to 60.0 mL of 0.100 M ammonia to form a mixture that has a pH
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To calculate the amount of solid NH4Cl to add to 60.0 mL of 0.100 M ammonia to form a mixture that has a pH, let's first write the balanced equation for the reaction between ammonia and ammonium chloride:NH4Cl(s) + NH3(aq) ⇌ NH4+(aq) + NH2-(aq)Now, let's write the equilibrium constant expression for the above reaction:Kb = ([NH4+][NH2-])/[NH3]
Since we want to form a mixture with a specific pH, we can use the following relationship:pH + pOH = pKwwhere Kw is the ion product constant for water (1.00 x 10^-14 at 25°C).At 25°C, pKw = 14.00, so:pOH = 14.00 - pHNow, we can use the relationship between pH, pOH, and the hydroxide ion concentration to solve for the hydroxide ion concentration:[OH-] = 10^-pOHNow, we can use the Kb expression to solve for the ammonium ion concentration:Kb = ([NH4+][NH2-])/[NH3][NH4+] = (Kb[NH3])/[NH2-]We can assume that the initial concentration of NH3 is equal to the concentration of ammonia in the mixture, which is 0.100 M. We can also assume that the initial concentration of NH4+ is zero. Therefore:[NH4+] = (Kb[NH3])/[OH-]Next, we can use the mass balance equation to calculate the amount of NH4Cl needed to form the desired mixture:m1 = m2 x (M2/M1)where m1 is the mass of NH4Cl needed, m2 is the mass of ammonia in the mixture, M1 is the molar mass of NH4Cl, and M2 is the molar mass of NH3.Substituting the given values into the above equation:m1 = (0.060 L x 0.100 mol/L x (10^-pH))/((Kb x 0.100 mol/L) / 10^-pH))(53.5 g/mol / 17.0 g/mol)where the factor (53.5 g/mol / 17.0 g/mol) is used to convert moles of NH4Cl to grams of NH4Cl. Simplifying the above expression yields:m1 = 0.108 gTherefore, 0.108 g of NH4Cl should be added to 60.0 mL of 0.100 M ammonia to form a mixture that has a pH of the desired value.For such more question on equilibrium
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An object has a mass of 20 g and a volume of 100 mL. What is the density of the object?
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Answer:
The answer is
0.2 g/mLExplanation:
The density of a substance can be found by using the formula
\(Density = \frac{mass}{volume} \)From the question
mass of object = 20 g
volume = 100 mL
Substitute the values into the above formula and solve
That's
\(Density = \frac{20}{100} \\ = \frac{2}{10} \\ = \frac{1}{5} \)
We have the final answer as
0.2 g/mLHope this helps you
Compare the volumes of naoh titrated at the endpoint and the equivalence point for a single titration. Which of these volumes is more accurate for determining the exact amount of a neutralized species? why?.
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The endpoint and equivalence point are two significant phases that are attained throughout the procedure.
The chemical equivalent between the added titrant and the sample analyte is referred to as the point of equivalence in a titration. Endpoint, on the other hand, is the location where the color of the solution changes. The equivalence point, or the ideal point for the termination of the titration, occurs when the moles of a standard solution (the titrant) equal the moles of a solution of unknown concentration (the analyte). At the titration's equivalence point, just enough titrant is given to totally neutralize the analyte solution.
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What is the concentration, in grams of solute per mL solvent) at 20.5 °C? mass solute Mass of solute = 0.078 g Mass of solvent = 0.100 g volume solvent Remember: 1 g H₂O = 1 mL H₂O A. 0.780 g/mL C. 0.078 g/mL B. 0.022 g/mL D. 0.0078 g/mL 2012
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The concentration, in grams of solute per mL solvent) at 20.5 °C is 0.780 g/mL, hence option A is correct.
Divide the solute's mass by the solvent's volume to get the concentration in grammes of solute per millilitre of solvent.
Mass of solute = 0.078 g
Mass of solvent = 0.100 g
Volume of solvent = 0.100 g (since 1 g H₂O = 1 mL H₂O)
Concentration = Mass of solute / Volume of solvent
Concentration = 0.078 g / 0.100 mL
Divide the supplied mass of the solute by the volume of the solvent to obtain the concentration in grams of solute per mL of solvent. Let's figure it out:
Concentration = 0.078 g / 0.100 mL = 0.78 g/mL
Thus, the concentration is 0.78 g/mL.
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CHEMISTRY PUNKS PLEASE HELP ME OUT!!!!!!!!!!!!!!!!! PLS. ILL LOVE U FOREVER N EVER! any point stealers will be reported <3
Answers
Answer: 25.0 L
Explanation:
For this problem, we will need to use Boyle's Law.
Boyle's Law: P₁V₁=P₂V₂
Since we are looking for V₂, we can rewrite the equation.
V₂=P₁V₁/P₂
The pressure should be in atm, so let's convert kPa to atm.
P₁=100 kPa=0.99 atm
P₂=200 kPa=1.97 atm
Now that we know the pressure in atm, we can plug it into the equation and solve.
\(V_{2} =\frac{(0.99 atm)(50.0L)}{1.97atm}\)
\(V_{2} =25.0 L\)
if an electron in an atom has the quantum numbers n = 3, ℓ = 2, mℓ = 1, and ms = 1/2, what state is it in?
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The given quantum numbers (n=3, ℓ=2, mℓ=1, and ms=1/2), the electron is in the 3d subshell, specifically in the 3d orbital with mℓ=1 and a spin up state (ms=1/2).
Based on the given quantum numbers, the electron is in the 3d state. The quantum number n refers to the principal quantum number, which determines the energy level of the electron. The quantum number ℓ refers to the angular momentum quantum number, which describes the shape of the electron's orbital. The quantum number mℓ refers to the magnetic quantum number, which describes the orientation of the orbital in space. Finally, the quantum number ms refers to the spin quantum number, which describes the direction of the electron's spin. Together, these quantum numbers provide a complete description of the electron's state within the atom.
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students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured.
what is the independent variable?
what is thw dependent variable?
what is the constant?
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Answer:
1. Age
2. Time
3. Same Puzzle
Explanation: Independent variable are what changes in the experiment and allow you to get a result. Dependent variables measure what you are trying to find from an experiment. Constants are what remain the same throughout all trials.
Will mark Brainliest!!! PLEASE HELP
Answers
2= B
3= E
4= F
5= A
Propose A Structural Formula For The Product Of This Reaction C10H22CINO2 CH-CОСH,CH,CI Et3N +
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The proposed structural formula for the product of the given reaction is not provided in the question.
What is the expected product formed from the reaction between C10H22CINO2, CH-CОСH, CH, CI, and Et3N?Without the specific structural formula or reaction conditions, it is challenging to provide an accurate and valid answer.
The structural formula for the product would depend on the functional groups present in the reactants and the specific reaction conditions, such as temperature, pressure, and catalysts used.
To propose a structural formula for the product, more information about the reaction mechanism and the functional groups involved is necessary. Without these details, it is not possible to determine the exact product.
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Balance the equation choose the coefficient for blank 3 (in front of KBr)___ KOH + ___ HBr --> ___ KBr + ___ H2O
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Balancing the equation :
KOH(aq) + HBr(aq) --> KBr(aq) + H2O(l)
This is the balanced chemical reaction because it follows the following ionic reaction:
H ^(aq)+ + Br^(aq)- + K^+(aq) + OH ^- (aq) → K^+(aq) + Br^-(aq) + H2O (l)
consider the following equilibrium of nitrous acid (HNO2) a weak acidHNO2 (aq) + H2O (l) <---> H3O+ (aq) + NO2^- (aq)which direction will the equilibrium shift if,a. NaOH is addedb. HCl is added
Answers
The addition of NaOH will shift the equilibrium to the left, while the addition of HCl will shift the equilibrium to the right. The direction of the shift depends on the reactants added and their reaction with the components of the equilibrium.
If NaOH is added to the solution, it will react with HNO2 to form the conjugate base NO2^- and water. This will increase the concentration of NO2^- and decrease the concentration of HNO2, causing the equilibrium to shift towards the left to restore equilibrium.
As a result, there will be a decrease in the concentration of H3O+ ions and an increase in the concentration of NO2^- ions.
On the other hand, if HCl is added to the solution, it will react with the conjugate base NO2^- to form HNO2 and chloride ions. This will increase the concentration of HNO2 and decrease the concentration of NO2^-, causing the equilibrium to shift towards the right to restore equilibrium.
As a result, there will be an increase in the concentration of H3O+ ions and a decrease in the concentration of NO2^- ions.
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determine the mass of co2 prodeced by burning enough carbon to produce 5 x 10^2 kj
Answers
= 55.7g
Explanation:
12g of carbon burnt to produce 5x10^2KJ
So, 5x10^2KJ(12g/393.5KJ)=15.2g
Then mas of CO2 is 44g
So, 15.2g(12g/44g)=57.7g
what’s the name of the compound AgNO3
Answers
Answer:
Silver nitrate
Explanation: