Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

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

Question 2

Which of the following is an example of a physical change?

Accepted Answer

Dissolving sugar in water.

Question 3

Which of the following is NOT a chemical property?

Accepted Answer

Has a yellow-orange color.

Question 4

Which of the following is an intensive property?

Accepted Answer

Density

Question 5

Which of the following is an extensive property?

Accepted Answer

Moles

Question 6

A sample of blood has a density of $$1.060 \ \mathrm{g/cm^3$}. $$What is the mass of $$400.00 \ \mathrm{mL} of $$blood?

Accepted Answer

$$424 \ \mathrm{g}$$

Question 7

Which of the following is a homogeneous mixture?

Accepted Answer

A cup of black coffee

Question 8

Convert $$3.20 	imes 10$$^{-9}$$ to standard notation.

Accepted Answer

$$0.0000000032$$

Question 9

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

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

Question 10

How many significant figures are in the measurement $$0.003840$$?

Accepted Answer

4

Question 11

A cube of silver measures $$0.56 \ \mathrm{m} on $$each side. If the density of silver is $$10.5 \ \mathrm{g/cm^3$}$$, what is the mass of the cube in kilograms?

Accepted Answer

$$1.85 \ \mathrm{kg}$$

Question 12

Which of the following is a correct example of scientific notation?

Accepted Answer

$$5.220 	imes 10$$^{3}$$

Question 13

Which of the following is a chemical change?

Accepted Answer

Cooking an egg

Question 14

A copper wire (density $$= 8.96 \ \mathrm{g/cm^3$}) $$has a diameter of $$0.32 \ \mathrm{mm}. If a $$sample of this wire has a mass of $$21.7 \ \mathrm{g}$$, what is its length in cm? (Use $$V = \pi r^2$ h)$$

Accepted Answer

$$300.6 \ \mathrm{cm}$$

Question 15

Which of the following is NOT a physical property?

Accepted Answer

An iron bar rusts

Question 16

Which of the following is a reversible change?

Accepted Answer

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

Question 17

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$$

Question 18

A pharmaceutical pill weighs $$2.5 \ \mathrm{g}$$ and contains $$4.0\%$$ active ingredient by mass. What mass of active ingredient is present in a bottle of $$120$$ pills (in kg)?

Accepted Answer

$$0.012 \ \mathrm{kg}$$

Question 19

Which of the following is NOT an SI base unit?

Accepted Answer

Liter

General Chemistry Chapter 1: Matter, Energy, and Measurement – Structured Study Notes

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