Chemistry Daily 10’s

Week 11

1

1. What is the mass of 0.240 mol glucose, C6H12O6?

a. 24.0 gb. 43.2 gc. 180.16 gd. 750. g

2. What is the percentage composition of CF4?

A. 20% C, 80% FB. 13.6% C, 86.4% FC. 16.8% C, 83.2% FD. 81% C, 19% F

2

1. A compound contains 259.2 g of F and 40.8 g of C. What is the empirical formula for this compound?

a. CF4

b. C4F

c. CFd. CF2

2. A compound's empirical formula is NO2. If the formula mass is 92 amu, what is the molecular formula?

A. NOB. N2O2

C. NO4

D. N2O4

3

1. The kinetic-molecular theory explains the behavior of

A. gases only.B. solids and liquids only.C. liquids and gases only.D. solids, liquids, and gases.

2. What is the process by which molecules of a gas randomly encounter and pass through a small opening in a container?

a. diffusionb. osmosisc. distillationd. effusion

4

1. The particles in both gases and liquidsA. consist only of atoms.B. can change positions with other particles.C. can only vibrate in fixed positions.D. are packed closely together.

• 2. Which substance's solid state consists of covalent molecular crystals?

• A. salt• B. water• C. sodium• D. diamond

5

1. Whenever a liquid changes to a vapor, itA. absorbs energy from its surroundings.B. is in equilibrium with its vapor.C. is boiling.D. is condensing.

2. When water is warmed from its freezing temperature to its temperature of maximum density, it

A. contracts.B. expands.C. maintains a constant volume.D. increases in weight.

Answers & Standards

• 1.1 b sc2c• 1.2 b sc2c• 2.1 a sc2c• 2.2 d sc2c• 3.1 d sc6a• 3.2 d sc6a• 4.1 b sc6a• 4.2 b sc6a• 5.1 a sc6c• 5.2 a sc1b sc3e