Question 1

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

Accepted Answer

Density

Question 2

A sample contains 0.0200 g of a substance. How many significant figures does this measurement have?

Accepted Answer

3

Question 3

Which statement best describes a homogeneous mixture?

Accepted Answer

It is uniform throughout and has a variable composition.

Question 4

Which of the following is the correct chemical symbol for potassium?

Accepted Answer

K

Question 5

A student measures the mass of a sample five times and gets values very close to each other, but far from the true value. This is an example of:

Accepted Answer

Inaccurate but precise measurements

Question 6

Which of the following numbers has 4 significant figures?

Accepted Answer

123.5

Question 7

What is the empirical formula for C6H12O6?

Accepted Answer

CH2O

Question 8

Which subatomic particle has a charge of +1 and is found in the nucleus?

Accepted Answer

Proton

Question 9

Calculate the average atomic mass of magnesium given the following data: $$^{24}Mg (78.99$$%, 23.98504 amu), $$^{25}Mg (10.00$$%, 24.98584 amu), $$^{26}Mg (11.01$$%, 25.98259 amu).

Accepted Answer

$$24.305$$ amu

Question 10

Which of the following best describes the difference between empirical and molecular formulas?

Accepted Answer

Empirical formulas give the lowest whole-number ratio, while molecular formulas give the exact number of atoms.

Question 11

Which of the following is a pure substance?

Accepted Answer

Copper metal

Question 12

If you add $$2.50 g $$and $$0.003 g$$, how many decimal places should your answer have?

Accepted Answer

2 decimal places

Question 13

Which of the following is NOT a correct rule for determining significant figures?

Accepted Answer

Zeros at the beginning of a number are significant.

Question 14

Which of the following is the correct symbol for gold?

Accepted Answer

Au

Question 15

A compound contains only hydrogen and oxygen. Which of the following could be its empirical formula?

Accepted Answer

HO

Question 16

Which of the following statements about mixtures is correct?

Accepted Answer

A homogeneous mixture has a uniform composition throughout.

Question 17

Which of the following is an extensive property?

Accepted Answer

Volume

Question 18

What is the charge and location of a neutron?

Accepted Answer

Neutral, in the nucleus

Question 19

Which of the following is the correct way to express a number with three significant figures using scientific notation?

Accepted Answer

$$2.00 	imes 10^2$

Question 20

Which of the following best describes the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

General Chemistry I: Chapters 1–11 Comprehensive Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards