How can you tell, from the drawings, that gravity is greater on Earth
than on Venus?
‼️ Physics‼️
Answers
Answer:
hi basically also also Aussie
Related Questions
Is C6H1206 an element or compound
Answers
C6H1206 is a compound (of glucose).
How are weathering and erosion the same?
a
Both move sediment from one place to another.
b
Both break down rocks into smaller pieces.
c
Both change Earth's surface.
d
Both leave sediment in new places
Answers
solid calcium reacts rigorously with liquid water to form aqueous calcium hydroxide and hydrogen gas. enter a balanced equation for the reaction.
Answers
Solid calcium reacts rigorously with liquid water to form aqueous calcium hydroxide and hydrogen gas. The balanced equation can be given as
CaH\(_2\) +2H\(_2\)O → Ca (OH)\(_2\) + 2H\(_2\)
What is chemical reaction?A chemical reaction is indeed a procedure that causes one group of chemical components to change chemically into another. Chemical bonds that link atoms are formed.
This is broken by traditional chemical processes, which only affect the locations of electrons and do not affect the nuclei of the atoms. Solid calcium reacts rigorously with liquid water to form aqueous calcium hydroxide and hydrogen gas. The balanced equation can be given as
CaH\(_2\) +2H\(_2\)O → Ca (OH)\(_2\) + 2H\(_2\)
Therefore, the balanced equation can be given as CaH\(_2\) +2H\(_2\)O → Ca (OH)\(_2\) + 2H\(_2\).
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How many moles of sulfur are in 53.7 grams of sulfur?
Answers
THE ATOMICITY OF SULPHUR IS 8 AND ITS MASS NUMBER IS 32.
SO, THE ATOMIC MASS IS 256
NO.OF.MOLES= 53.7/256
= 537/2560
= 0.2097
Answer:
1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)
The specific heat capacity of silver is 0.24 J/g °C. How many joules of energy are needed
to warm 0.500 g of silver from 25.0°C to 27.5°C?
Answers
Answer:
0.3 J
Explanation:
The equation for heat capacity is Q = mcΔT where Q is the heat, m is the mass of the substance, c is the specific heat capacity of the substance and delta T is the change in temperature. Plugging those values into the equation, we have Q = (.500)(0.24)(27.5-25) = 0.3
the difference between the potential energy of the products and the potential energy of the reactants is equal to
Answers
Delta E represents the energy difference between reactants and products in a chemical reaction.
The contrast between the possible energy of the items and the likely energy of the reactants is known as the adjustment of expected energy or ΔE. In a synthetic response, this energy contrast addresses how much energy that is either delivered or consumed during the response.
Assuming the potential energy of the items is lower than that of the reactants, then the response discharges energy as intensity, light, or sound. This is known as an exothermic response. On the other hand, assuming the expected energy of the items is higher than that of the reactants, then, at that point, the response assimilates energy from its environmental elements. This is known as an endothermic response.
The size of ΔE relies upon a few variables, including the compound bond qualities and the temperature and tension of the response. Understanding the adjustment of potential energy is significant in fields like science and thermodynamics, as it permits researchers to anticipate and control the energy changes that happen during synthetic responses.
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The complete question is:
In a reaction, the potential energy of the reactants is 40 kJ/mol, the potential energy of the products is 10 kJ/mol and the potential energy of the activated complex is 55 kJ/mol. What is the activation energy for the reverse reaction?(answer: 45 kJ/mol)
The gas in an aerosol can is at a pressure of 3.10 atm at 25 degrees Celsius. Directions on the can warn the user not to keep the can in a place above 52 degrees Celsius. What would the gas pressure in the can be at 52 degrees Celsius
Answers
Answer:
\(\boxed {\boxed {\sf 6.4 \ atm}}\)
Explanation:
We are asked to find the pressure of a gas in a can given a change in temperature. We will use Gay-Lussac's Law, which states the pressure of a gas is directly proportional to the temperature. The formula for this law is:
\(\frac {P_1}{T_1}= \frac {P_2}{T_2}\)
Initially, the gas in the aerosol can has a pressure of 3.10 atmospheres at a temperature of 25 degrees Celsius.
\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{T_2}\)
The temperature is increased to 52 degrees Celsius, but the pressure is unknown.
\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C}\)
We are solving for the new pressure, so we must isolate the variable \(P_2\). It is being divided by 52 degrees Celsius. The inverse operation of division is multiplication, so we multiply both sides of the equation by 52 °C.
\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C} * 52 \textdegree C\)
\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=P_2\)
The units of degrees Celsius cancel.
\(52 *\frac { 3.10 \ atm}{25}=P_2\)
\(52 *0.124 \ atm = P_2\)
\(6.448 \ atm = P_2\)
The original values of pressure and temperature have 2 and 3 significant figures. Our answer must be rounded to the least number of sig figs, which is 2. For the number we calculated, that is the tenths place. The 4 in the hundredth place tells us to leave the 4 in the tenths place.
\(6.4 \ atm \approx P_2\)
The gas pressure in the can at 52 degrees Celsius is approximately 6.4 atmospheres.
What does the position of lithium on the periodic table tell you about its tendency to react with other elements? (2 points)
Answers
The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers. The elements are arranged in the increasing order of their atomic numbers.
Here the element Lithium is a alkali metal which is located in the group 1 of the periodic table and placed in the second period. Its atomic number is 3. Alkali metals are highly electropositive and are good reducing agents.
Lithium reacts with the elements of groups 16 and 17 and form compounds, they also burn in oxygen and react with water.
The reaction of lithium with water is:
2Li + 2H₂O → 2LiOH + H₂
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Why are triacylglycerols the major form of stored energy instead of glucose? Choose one or more: A. The fatty acids of a triacylglycerol have fewer carbons than a molecule of glucose, so it is easier to completely metabolize. B. Triacylglycerols are highly soluble in blood serum so can be readily transported. C. The hydrophobic nature of triacylglycerols means that they are not solvated by water and therefore have less mass per unit volume. The greater energy density translates into more energy stored in the same volume. D. Fatty acids are at a higher reduction state than that of glucose and therefore yield more energy for the same number of carbons upon oxidation.
Answers
Triacylglycerols are the major form of stored energy instead of glucose because they have a higher energy density due to their hydrophobic nature, they can be easily transported in the blood serum, and they yield more energy per carbon upon oxidation compared to glucose.
Triacylglycerols are more advantageous as a stored energy form compared to glucose for multiple reasons. Firstly, triacylglycerols have a higher energy density because of their hydrophobic nature. They are not solvated by water and therefore have less mass per unit volume, allowing for more energy to be stored in the same volume.
Secondly, triacylglycerols are highly soluble in blood serum, enabling efficient transportation to different parts of the body where energy is needed. This solubility facilitates the mobilization and delivery of stored energy to meet metabolic demands.
Lastly, the fatty acids in triacylglycerols are at a higher reduction state compared to glucose. This higher reduction state means that fatty acids yield more energy per carbon upon oxidation. Thus, the oxidation of fatty acids in triacylglycerols provides a greater amount of energy compared to the oxidation of glucose, making them an efficient energy source for the body.
Overall, the combination of higher energy density, easy transportability, and greater energy yield per carbon make triacylglycerols the preferred form of stored energy in the body compared to glucose.
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Which of the following is NOT an environmental threat from the use
of coal?
Select one:
O a Water Pollution
Ob Sound Pollution
Oa Solid Waste Buildup
O d. Air Pollution
Answers
if the reaction vessel initially contained only dinitrogen tetroxide, would you expect an overall increase or decrease in pressure as the reaction proceeds? justify your reasoning
Answers
If the reaction vessel initially contained only dinitrogen tetroxide, the overall increase in pressure occurs as the reaction proceeds.
The phrase "rate of response" refers to how quickly or slowly a reaction might occur, thus we would need to rapidly remind ourselves of this. We are aware that if a reaction happens quickly, we will claim that it happened quickly, and vice versa.
Let's keep in mind that in this situation, the relationship between the gas's volume and pressure is inverse. As a result, the volume of the gas would decrease as the pressure did. On the right side, there are two volumes, while on the left, there is one volume.
When there are two moles of gas on the right side and the gas pressure increases as we walk from left to right, it is what we would anticipate.
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What is the name of the following atoms?
An atom with 3 protons and 4 neutrons what is the name?
Answers
Answer:
an atom with 3 protons and 4 neutrons is a lithium atom
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A group of students simulates colliding air masses. Using an index card for separation, a jar of warm tap water with red food coloring is placed over a jar of cold water with yellow food coloring. The index card that separates the two bodies of water is removed. Students observe how the two fronts travel in relation to one another.
A.) Air masses are not distinguisable by color.
B.) Air masses are neither hot nor cold in temperature
C.) Air masses do not collide in real life
D.) Air masses cannot be modeled
Answers
Which statements about carbon fluxes are true? Select three.
a. oceans play a negligible role in storing carbon
b. a plan that includes a fast transition to no-carbon fuels would be required to keep global warming below the target set by the Paris Accord
c. Deforestation increases the amount of carbon released into the atmosphere
d. nearly all the flux of carbon from the atmosphere to land ecosystems occurs through photosynthesis
e. the amount of carbon removed from the atmosphere by natural processes is expected to stay the same during this century
Answers
The rate at which carbon is exchanged between different carbon sinks and reservoirs is known as carbon flux. Therefore, the statements which are true about carbon fluxes are B, C, and D.
The quantity of carbon exchanged between Earth's carbon pools – the oceans, atmosphere, land, and living organisms – is known as a carbon flux, and it is commonly measured in gigatonnes of carbon per year (GtC/yr). The carbon cycle is the process through which carbon from the Earth is exchanged globally. Each year, this cycle exchanges enormous amounts of carbon.
Fluxes are a normal part of all healthy ecosystems, including forests. However, as a result of climate change-related disturbances, positive carbon fluxes (net annual vegetation storage) may decline and finally turn negative.
The potential for a shift in the vegetation carbon sink over time highlights the need of protecting and restoring the world's forests, which are crucial to the fight against climate change and help reduce greenhouse gas emissions. This emphasizes how crucial it is to safeguard forests and trees as important carbon reserves.
Therefore, the statements which are true about carbon fluxes are B, C, and D.
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Read the two questions.
Question 1: Do heavy metals like lead and arsenic cause damage to human DNA?
Question 2: Should industries releasing heavy metals into land and water ecosystems be penalized?
Use complete sentences to explain whether both questions can be answered by science or not. Be sure to explain why for each question.
Answers
Question 2: This question is more complex, as it involves not just a scientific question, but also a moral and ethical one. Science can help inform the decision of whether industries releasing heavy metals into land and water ecosystems should be penalized by providing information on the environmental and health impacts of such releases. However, whether or not to penalize these industries is ultimately a decision that involves weighing scientific evidence against other considerations, such as economic and political factors. Therefore, while science can provide valuable information to help answer this question, the answer is not solely a matter of science.
Answer:
Question 1 can be answered by science. Scientists have conducted studies and research on the effects of heavy metals like lead and arsenic on human DNA. They have found that exposure to these metals can cause damage to DNA, leading to health problems and diseases.
Question 2 is a more complex question that cannot be answered solely by science. While science can provide information on the effects of heavy metals on ecosystems and human health, the decision of whether industries should be penalized for releasing heavy metals into the environment is a matter of policy and ethics. It involves weighing the economic benefits of the industry against the potential harm to the environment and human health. This decision requires input from multiple stakeholders, including scientists, policymakers, and members of the affected communities, and involves considerations beyond just scientific evidence.
At the candy store, gourmet jelly beans sell for $1.15 per ounce. There are 28 students in Alfred's class. If each student eats 0.035 kg of jelly beans, how much would it cost to feed the class a gourmet jelly bean treat?
Answers
Answer:
Total cost = $40.25 (Approx)
Explanation:
Given:
Per ounce = $1.15
Number of student = 28
Each student eat = 0.035 kg
Find:
Total cost
Computation:
Total weight of candy = 28 × 0.035 kg
Total weight of candy = 0.98 kg
1 ounce = 0.028 kg (approx).
Total weight of candy = 0.98 kg / 0.028
Total weight of candy = 35 ounce (Approx)
Total cost = 35 × $1.15
Total cost = $40.25 (Approx)
Chae and Bernie were ice-fihing at a frozen pond where the temperature wa –4⁰C. A the boy at on the ice, the thermal energy of the ice , and ome of the ice. One of Bernie’ glove became wet. A it at in the cold air, the thermal energy of the water on the glove , and the water on the glove
Answers
When Chae and Bernie were ice-fishing at a frozen pond where the temperature was -4⁰C, the thermal energy of the ice was transferred to the boys' bodies, as well as some of the water on the ice.
When Bernie stepped onto the ice, some of the thermal energy from his body was transferred to the water on his glove, causing it to become wet. As the water on the glove cooled in the cold air, the thermal energy of the water was released, causing the glove to become colder.
The thermal energy of ice is the energy that is released or absorbed when the temperature of the ice changes. When ice is heated, it absorbs energy from its surroundings, which is stored as thermal energy. Conversely, when ice is cooled, it releases energy which can be used as thermal energy
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how many molecules of h2s are required to form 79.0 g of sulfur according to the following reaction? assume excess so2.
Answers
9.89X10^23 molecules of H2S are required to form 79.0 g of sulfur
The molar mass of sulfur is 32.07g/mol. The calculation to determine the number of molecules of H2S using the balanced equation is
molecule H2S=79x 1/32.07gX 2moles H2S/3 moles S x 6.022x 10^23/1 mol H2S
molecule of H2S=9.89 X 10^23 molecules H2S
A substance's molar mass is the mass in grams of one mole of the substance. As demonstrated in this video, the molar mass of a substance can be calculated by adding the molar masses of its constituent atoms. The calculated molar mass can then be used to convert between mass and the number of moles of the substance.
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What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?
Answers
An element with 17 protons will ALWAYS be chlorine.
The mass number is found by adding the element’s protons and neutrons.
protons+neutrons=mass number
Here is the math if needed,
17+20=37
Therefore the mass number is 37
I hope this helped!
The temperature of a 0.65L sample of carbon dioxide gas is 580K. If the pressure remains constant, what is the new volume of the gas if the temperature increases to 1300K?
Answers
1. Which liquid is more us cous: evaporated milk or condensed milk? Explain your answer based on your observation.
2. To which of type of magma can you liken the evaporated milk or condensed milk? Explain your answer
Answer correctly please...
Answers
Condensed milk is more viscous than evaporated milk. This is because condensed milk has had the majority of its water content removed through evaporation, leaving a thicker, sweeter substance.
It is not appropriate to liken evaporated milk or condensed milk to a type of magma as Magma is molten rock that can be found under the Earth's surface while evaporated milk and condensed milk are dairy products. They do not have any relation with magma.
What is a molten rock?A molten rock, also known as magma when it is underground and lava when it erupts and flows on the surface, is a mixture of liquid rock, dissolved gases, and solid mineral crystals. It is formed deep within the Earth's crust and can be composed of a variety of elements such as silicon, oxygen, aluminum, and iron.
When it is erupted, the pressure and temperature decrease, causing the dissolved gases to escape and the solid mineral crystals to form, creating the solid rock we see on the surface.
Therefore, the correct answer is as given above
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Which of the compounds below would contain polar covalent bonds? F2, N2O, KCl A. KCl only B. N2O only C. F2 only D. Both F2 and N2O
Answers
The compound below that would contain polar covalent bonds is : B. N2O only .
What do you understand by polar covalent bonds?Polar covalent bond is a covalent bond in which electron density is unevenly shared between the two bonded atoms, due to the difference in electronegativity or due to the inductive effects.
An example of a polar bond is the bond in water between hydrogen and oxygen and bond is classified as polar bond because it has a large electronegativity difference of 1.4. Electrons in hydrogen are more attracted to the electrons in oxygen as oxygen is more electronegative.
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Mendeleev placed thallium (Tl) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn’t place thallium in this group. Use the periodic table to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also explain how thallium is different from the other five elements.
Answers
Answer:
When observing how thallium reacts with the air of the earth's atmosphere, its hardness or resistance resembled sodium, it was not investigated further to classify it correctly
Explanation:
Now it is known that they contain different numbers of valence electrons and that thallium is a heavy metal like lead and that they have similar characteristics except for their melting point where thallium is higher.
Mendeleev might have grouped thallium in the same group as lithium and sodium due to many reasons:
Since, all are metals so they need to be placed in the same group.The particular group is referred to (group one) is actually the most reactive metals on the periodic table. These are the elements that most easily loose their electron from their outer valence shell. Thus each element can easily give up their valence electron in a reaction to form a positive ion. These are the most easily reactive in this way.When observing how thallium reacts with the air of the earth's atmosphere, its hardness or resistance resembled sodium, it was not investigated further to classify it correctly.Now it is known that they contain different numbers of valence electrons and that thallium is a heavy metal like lead and that they have similar characteristics except for their melting point where thallium is higher.
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How does changing the shape of an elastic object increase potential
energy?
Answers
If you collect oxygen over water (by water displacement) at 763.0 torr total pressure and 22.3°C, what is the partial pressure of the oxygen?
Answers
The partial pressure of oxygen collected over water at 763.0 torr total pressure and 22.3°C is 741.9 torr.
How to find the partial pressure of the oxygen?
When collecting a gas over water by water displacement, the total pressure in the collection vessel will include both the pressure of the gas being collected and the vapor pressure of water at the given temperature.
We can use Dalton's Law of Partial Pressures to calculate the partial pressure of the oxygen:
P_total = P_oxygen + P_water vapor
Where
P_total is the total pressure P_oxygen is the partial pressure of the oxygen P_water vapor is the vapor pressure of water at the given temperatureAt 22.3°C, the vapor pressure of water is 21.1 torr. Therefore, we can rearrange the equation to solve for the partial pressure of the oxygen:
P_oxygen = P_total - P_water vapor
P_oxygen = 763.0 torr - 21.1 torr
P_oxygen = 741.9 torr
So, the partial pressure of oxygen collected over water at 763.0 torr total pressure and 22.3°C is 741.9 torr.
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If a 1.0 mm of 10.0 NaOH normal is added to a liter of buffer repair in the NaH2O4 Which is 0.042 and Na2HPO4 which is 0.058, how much will PH change
Answers
Answer:
Explanation:
Using H-H equation for the NaH2O4/Na2HPO4 buffer:
pH = pKa + log [Na2HPO4] / [NaH2PO4]
Where pKa of this buffer is 7.198, [Na2HPO4] = 0.058M = moles [NaH2PO4] = 0.042M = moles
Replacing:
pH = 7.198 + log [0.058M] / [0.042M]
Initial pH = 7.34
Now, NaOH reacts with NaH2PO4 as follows:
NaOH + NaH2PO4 → Na2HPO4 + H2O
That means, the moles of NaOH are additional moles of Na2HPO4 and subtracted moles of NaH2PO4.
The moles of NaOH added:
1.0mm³ = 1.0x10⁻³L * (10mol / L) = 0.01 moles
NaH2PO4:
0.042mol - 0.010mol = 0.032moles
Na2HPO4:
0.058mol + 0.010mol = 0.068moles
Replacing in H-H equation:
pH = 7.198 + log [0.068M] / [0.032M]
Final pH = 7.53
Change in pH = 7.53 - 7.34
The change in pH is 0.19 units
Based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. 101 105 106 107
Answers
Based on their pOH values, the difference in [OH– ] concentration between point A and point B is 10^6.
What is pH of a substance?The pH is determined by the concentration of Hydrogen ions [H+]. The higher the concentration of H+ ions, the lower the pH of a substance. If the concentration of H+ is greater than OH-, the material is acidic, i.e. the pH value is less than 7
In this case, the formula for this will be:
\(pH= -log[H+]\)
So we have:
\([OH]= 14-1= 10^{-13}\\[OH] = 14-7=10^{-7}\)
Therefore, the difference in [OH– ] concentration between point A and point B is 10^6.
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Answer: 10^6
Explanation: edge2023
If 2.09 mol of ethane (C₂H6) undergo combus-
tion according to the unbalanced equation
C₂H6+ O2 CO₂ + H₂O,
how many moles of O₂ is required?
Answer in units of mol. Answer in units of
mol.
Answers
For every mole of C2H6 you’ll get 2 moles of CO2 and 3 moles of H2O
We know this because the carbon and hydrogen has to be equivalent on both sides.
2.09 * 2 = 4.18 moles of CO2
2.09 * 3 = 6.27 moles of H2O
4.18 * 2 + 6.27 = 8.36 + 6.27 = 14.63 moles of O
14.63/2 = 7.32 moles of O2
PLEASE HELP BRAONLIST ANSWER
Answers
Explanation:
decrease since the photons have to travel through a cloudier substance
Which of these groups would be MOST concerned with technological developments in insect control?
A.
archaeologists
B.
paleontologists
C.
meteorologists
D.
agriculturists
Answers
Answer:
archaeologists
Explanation:
Meteorologist: weather man
Paleontologist: a scientist who studies the history of life on Earth through the fossil record.
Agriculturalist: One who practices agriculture, a farmer, a gardener.
archaeologists: Archaeologists can work for research organizations, consulting and cultural resource management firms, government agencies, and museums.