Chemistry » Page 13

Chemistry

For any chemical system, the goal of breaking or making bonds is to (decrease or increase) the overall potential energy of the system?

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Chemistry

If you purchased 2.31 μCi of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new?

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Dennis Fernandez

Chemistry

If the theoretical yield of a reaction is 0.110 g and the actual yield is 0.104 g, what is the percent yield?

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Chemistry

The two most abundant gases in the atmosphere are select one:

a. water vapor and carbon dioxide.

b. nitrogen and water vapor.

c. nitrogen and oxygen.

d. oxygen and carbon dioxide. previous page

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Chemistry

What has a higher temperature a match or an ice cube

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Chemistry

Compare S (secondary) waves and P (primary) waves. Why do they travel at different speeds?

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Chemistry

The universe contains only about one-tenth as many helium atoms as hydrogen atoms. But a hydrogen atom is only one-quarter the mass of a helium atom. So approximately what is the ratio of the universe's helium to hydrogen by mass

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Chemistry

3. How far is Earth from the Sun? -

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Chemistry

60.0 mL of 0.100 M Ca (OH) 2 solution is mixed with 50.0 mL of 0.100 M HNO3. Calculate the volume of 0.100 M H2SO4 needed to neutralize the resulting mixture.

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Chemistry

Calculate the number of moles of solute present in 185.0 mL of a 1.50 mol/L solution of HCl.

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Chemistry

How many percent of ca are in calcium carbonate

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Chemistry

Why do people have swollen lymph nodes when they are sick?

A. Bacteria are stored in the lymph nodes.

B. More white blood cells are being produced

C. Most viruses attack the lymph nodes.

D. Red blood cells stick together during illness.

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Chemistry

Which of the following formulas represents an ionic compound? A. CO2 B. CaCl2 C. H2O D. Br2

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Jayvon Valenzuela

Chemistry

How does changing the concentration change the ph of a solution

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Kaiya Rodriguez

Chemistry

What is the difference b/w thermodynamic cycle and mechanical cycle

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