Q: A student wants to convert $$2.00\ \mathrm{in}^3 to$$ $$\mathrm{cm}^3. $$Given $$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$, what is the correct conversion setup?

$$2.00\ \mathrm{in}^3 \times \left(\frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}\$$right)^3$$

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 molecule?

Accepted Answer

Two or more atoms joined together.

Question 2

Carbon monoxide (CO) is toxic because it binds to hemoglobin in blood. What is the consequence of this binding?

Accepted Answer

It prevents hemoglobin from carrying oxygen, leading to oxygen deprivation.

Question 3

Which statement about the scientific method is correct?

Accepted Answer

A scientific theory is a model explaining what nature does and why.

Question 4

Which of the following is a chemical change?

Accepted Answer

Iron rusting when exposed to oxygen.

Question 5

A student measures the mass of a nickel as 5 g. What is the SI unit for mass?

Accepted Answer

Kilogram (kg)

Question 6

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 7

A sample of lead has a volume of $$4.0\ \mathrm{cm}^3$$ and a density of $$11.3\ \mathrm{g/cm}^3. $$What is its mass?

Accepted Answer

$$45.2\ \mathrm{g}$$

Question 8

Which temperature scale is an absolute scale with no negative numbers and is directly proportional to average kinetic energy?

Accepted Answer

Kelvin

Question 9

Convert $$100.0\ ^\circ\mathrm{C} to $$Kelvin.

Accepted Answer

$$373.15\ \mathrm{K}$$

Question 10

Which of the following numbers has 4 significant figures?

Accepted Answer

$$0.001050$$

Question 11

A student records a measurement as $$1.050 	imes 10$$^{-3}$$. How many significant figures does this number have?

Accepted Answer

4

Question 12

Which of the following is an exact number?

Accepted Answer

The definition $$1\ \mathrm{cm} = 0.01\ \mathrm{m}$$

Question 13

Which of the following is a derived SI unit?

Accepted Answer

Cubic meter ($$\mathrm{m}^3)$$

Question 14

A student wants to convert $$2.00\ \mathrm{in}^3 to$$ $$\mathrm{cm}^3. $$Given $$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$, what is the correct conversion setup?

Accepted Answer

$$2.00\ \mathrm{in}^3 	imes \left(\frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}\$$right)^3$$

Question 15

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 16

A sample of water has a mass of $$250\ \mathrm{g}. If $$the density of water is $$1.0\ \mathrm{g/mL}$$, what is the volume of the sample?

Accepted Answer

$$250\ \mathrm{mL}$$

Question 17

Which of the following statements about mass and weight is correct?

Accepted Answer

Mass stays the same, but weight changes depending on gravitational pull.

Question 18

Which of the following is NOT a method for separating mixtures?

Accepted Answer

Combustion

Question 19

A measurement is recorded as $$12.0\ \mathrm{cm}$$, $$12.1\ \mathrm{cm}$$, and $$12.0\ \mathrm{cm} in $$three trials. The true value is $$13.0\ \mathrm{cm}. $$Which statement best describes the measurements?

Accepted Answer

Precise but not accurate

Question 20

Which of the following is the correct formula for density?

Accepted Answer

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

Chapter 1: Matter, Measurement, and Problem Solving – General Chemistry Study Notes

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