Question 1

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the gravitational pull on that matter.

Question 2

A scientist measures the temperature of a solution as $25.0\ ^\circ\mathrm{C}$. What is this temperature in Kelvin?

Accepted Answer

$298.15\ \mathrm{K}$

Question 3

Which of the following is an example of a chemical property?

Accepted Answer

The flammability of gasoline

Question 4

A block of aluminum has a mass of $54.0\ \mathrm{g}$ and a volume of $20.0\ \mathrm{mL}$. What is its density?

Accepted Answer

$2.70\ \mathrm{g/mL}$

Question 5

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand in water

Question 6

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros after a decimal point are significant.

Question 7

A student records the mass of a sample as $0.0520\ \mathrm{g}$. How many significant figures does this measurement have?

Accepted Answer

3

Question 8

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

Accepted Answer

The melting of ice

Question 9

A solution is prepared by dissolving $5.00\ \mathrm{g}$ of NaCl in $100.0\ \mathrm{g}$ of water. Which term best describes this solution?

Accepted Answer

Homogeneous mixture

Question 10

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

Accepted Answer

Density

Question 11

A sample of water is heated from $20.0\ ^\circ\mathrm{C}$ to $80.0\ ^\circ\mathrm{C}$. What is the temperature change in Kelvin?

Accepted Answer

$60.0\ \mathrm{K}$

Question 12

Which of the following best describes a scientific law?

Accepted Answer

A brief statement that summarizes past observations and predicts future ones.

Question 13

Convert $4.00 	imes 10^{-6}$ to standard notation.

Accepted Answer

0.00000400

Question 14

Which of the following is a derived unit in the SI system?

Accepted Answer

Liter (L)

Question 15

A student multiplies $2.50$ (3 sig figs) by $3.1$ (2 sig figs). What is the correct number of significant figures in the answer?

Accepted Answer

2

Question 16

Which of the following is an example of a systematic error?

Accepted Answer

A scale that always reads 0.5 g too high

Question 17

Which of the following is a correct conversion factor for changing centimeters squared to inches squared?

Accepted Answer

$\frac{6.45\ \mathrm{cm}^2}{1\ \mathrm{in}^2}$

Question 18

Which of the following best describes the scientific method?

Accepted Answer

A way of learning that emphasizes observation and experimentation

Question 19

Which of the following is a chemical change?

Accepted Answer

The burning of lamp oil

Question 20

A sample of gold has a mass of $38.6\ \mathrm{g}$ and a density of $19.3\ \mathrm{g/mL}$. What is its volume?

Accepted Answer

$2.00\ \mathrm{mL}$

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

Study Guide - Practice Questions