Chemistry » Page 32

Chemistry

Keenan Mccullough

What is the molar mass of an unknown hydrocarbon whose density is measured to be 1.97 g/l at stp?

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Chemistry

Guest

Which is an example of flow of heat through conduction

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Chemistry

Genevieve Stanton

Which of the following is an extensive physical property of matter? volume viscosity odor density

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Chemistry

Warren Mercer

When is Ksp determined for a system?

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Chemistry

Nylah Hanna

What is the average surface temperature of Uranus

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Chemistry

Emilee Maxwell

Consider the following statements.

A. Molecules of hot water have less kinetic energy than those of cold water.

B. For most solids, solubility increases when temperature increases.

C. Water dissolves most ionic compounds because the ends of a water molecule are similarly charged.

Which of the statements is/are true?

1. None is true.

2. All are true.

3. B only

4. A and B only

5. B and C only

6. A only

7. C only

8. A and C only

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Chemistry

Bailey Richmond

Which describes the fourth state of matter known as plasma?

A It is a liquid containing nuclei and electrons.

B It is a gas containing nuclei and electrons.

C It is a liquid containing electrons created by fusion.

D It is a gas containing nuclei created by fusion.

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Chemistry

Kayley Roman

The process of using dna to produce complementary rna molecules is called

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Chemistry

Averie Wallace

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound?

A.

CaCl

B.

Ca0.9Cl1.8

C.

CaCl2

D.

Ca2Cl4

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Chemistry

Yadira Fitzgerald

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g. (a) What is the empirical formula of bismuth chloride?

(b) What is the theoretical percent of Bi in the bismuth chloride, based on this formula?

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Chemistry

Guest

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

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Chemistry

Austin Spencer

1. How is pressure affected as depth increases?

2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers?

3. How is temperature affected when?

(a) the depth increases

(b) the latitude increases

4. How is salinity affected?

(a) evaporation increases

(b) freezing increases

(c) melting increases

(d) precipitation increases

5. How is density affected when?

(a) the temperature increases

(b) the depth increases

(c) the latitude increases

(d) the salinity increases

6. Where does the energy that causes evaporation come from?

7. What role does gravity play in the water cycle?

8. Describe the flow of one molecule of water through the water cycle, beginning in the ocean.

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Chemistry

Bridget Ortiz

Are nails in a jar with water a chemical change

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Chemistry

Guest

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.

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Chemistry

Yoselin Boyd

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.

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