HESI Chemistry Practice Test 1

Question 1

What is the atomic number of an unknown element with 45 protons and an atomic mass of 64?

Accepted Answer

45

Answer

64

Answer

22

Answer

Cannot be determined

Question 2

What is the usage of scientific notation?

Accepted Answer

The plan is to make it easier to deal with both tiny and large quantities.

Answer

The plan is to make it easier to deal with fewer numbers.

Answer

The plan is to make it easier to deal with larger numbers.

Answer

There is no point.

Question 3

In degrees Celsius, a typical human body temperature is

Accepted Answer

37 degrees

Answer

33 degrees

Answer

38 degrees

Answer

35 degrees

Question 4

What is the sodium charge in the compound NaCl?

Accepted Answer

+1

Answer

0

Answer

3

Answer

−1

Question 5

Which of the following causes cramps during strenuous exercise?

Accepted Answer

Lactate

Answer

Protein

Answer

Pyruvate

Answer

Glucose

Question 6

What does -COOH mean?

Accepted Answer

Carboxyl group

Answer

Carbonyl group

Answer

Amino group

Answer

Hydroxyl group

Question 7

Unstable nuclei, given enough time, will:

Accepted Answer

decay into a stable form

Answer

evolve

Answer

degrade into a further unstable form

Answer

None of the above

Question 8

Citric acid is found in lemon juice. Which of the following pH levels is most likely for lemon juice?

Accepted Answer

2

Answer

7

Answer

9

Answer

15

Question 9

If a specific reversible process reached equilibrium, what would happen if more reactants were added?

Accepted Answer

The equilibrium would change in favor of the formation of additional products.

Answer

The reaction would heat up

Answer

The equilibrium position would move, resulting in the formation of more reactants.

Answer

Nothing, because the reaction has reached equilibrium.

Question 10

What is the molarity of an aqueous solution containing 0.40 moles of sugar in 5 liters of water?

Accepted Answer

0.08 M

Answer

0.04 M

Answer

8.0 M

Answer

400.0 M