Q: What is the volume in $$km^3 of a $$room with a volume of $$1.15 \times 10^8$ cm^3$?

$$1.15 \times 10$$^{-7}$$ km^3$

Question 1

Which of the following best describes a compound?

Accepted Answer

Matter composed of two or more different elements that are chemically bonded together.

Question 2

Which of the following is an example of a homogeneous mixture?

Accepted Answer

A cup of black coffee

Question 3

Which process is a chemical change?

Accepted Answer

Cooking an egg

Question 4

Which of the following is a reversible change?

Accepted Answer

Melting a chocolate bar then re-solidifying it in the freezer.

Question 5

Which of the following represents a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen gas.

Question 6

Which of the following is NOT a physical property?

Accepted Answer

An iron bar rusts.

Question 7

Which of the following is NOT an example of an intensive property?

Accepted Answer

Milligrams

Question 8

Which of the following is an extensive property of a nitrogen molecule?

Accepted Answer

Moles

Question 9

What is the correct formula to convert Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 10

Which of the following scientific notation values is written correctly?

Accepted Answer

$$5.220 x 10^3$$

Question 11

Which SI base unit is used to measure the amount of substance?

Accepted Answer

Mole (mol)

Question 12

What is the volume in $$km^3 of a $$room with a volume of $$1.15 	imes 10^8$ cm^3$?

Accepted Answer

$$1.15 	imes 10$$^{-7}$$ km^3$

Question 13

How many significant figures are in the measurement 3,482,005 mg?

Accepted Answer

7

Question 14

When multiplying and dividing numbers, the final answer should contain:

Accepted Answer

The least number of significant figures from the original numbers.

Question 15

A TA can grade 4 assignments per hour. If each assignment has 12 questions, how many questions can the TA grade in 130 minutes?

Accepted Answer

104 questions

Question 16

If the density of an unknown metal is 21.4 $$g/cm^3$$, express its density in $$lb/ft^3. (1 lb = 453.6 g$$, 1 $$ft^3 = 28$$,316 $$cm^3)$$

Accepted Answer

1,340 $$lb/ft^3$$

Question 17

A piece of unknown solid weighs approximately 0.045 lbs. When placed in a glass beaker, the water level increases from 200 mL to 260 mL. What is the density of the unknown solid in g/mL? (1 lb = 453.6 g)

Accepted Answer

0.75 g/mL

Question 18

Lipitor pills weigh 2.5 g each and contain 4.0% active ingredient by mass. What mass in kg of the active ingredient is present in one bottle of 120 pills?

Accepted Answer

0.012 kg

Question 19

Which of the following is the correct formula for the volume of a cube?

Accepted Answer

$$V = a^3$

General Chemistry: Matter, Properties, Measurement, and Calculations

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