Question 1

Which of the following is NOT a state of matter commonly found on Earth?

Accepted Answer

Plasma

Question 2

Which of the following is a chemical compound?

Accepted Answer

Water

Question 3

Which of the following is an example of a mixture?

Accepted Answer

Air

Question 4

Which statement about mixtures is INCORRECT?

Accepted Answer

Mixtures are always homogeneous.

Question 5

An atom contains $$1.50 	imes 10$$^{24}$$ atoms of sodium. What is this mass in units of grams?

Accepted Answer

$$57.5 g$$

Question 6

How many moles of $$Fe_2O_3$$ are in a can that contains $$618 g$$?

Accepted Answer

$$3.87$$ mol

Question 7

The proprietor of a rock shop insists that a nugget is pure gold. If the nugget occupies a volume of $$5.40 mL$$, what would its mass have to be if it were truly pure gold? (Density of gold = $$19.3 g/mL)$$

Accepted Answer

$$104 g$$

Question 8

Which of the following is NOT an example of a chemical property?

Accepted Answer

Sugar will dissolve in water.

Question 9

The number $$0.009525$$ correctly expressed in scientific notation is:

Accepted Answer

$$9.525 	imes 10$$^{-3}$$

Question 10

Match the type of measurement to the unit given below: 1) cm$$^3$$

Accepted Answer

Volume

Question 11

Select the correct prefix to complete the equality: $$1 	ext{ g} = \underline{\hspace{0.5cm}} 	ext{ mg}$$

Accepted Answer

$$1000$$

Question 12

Identify each of the following transformations as a chemical or physical change: Burning a piece of paper.

Accepted Answer

Chemical

Question 13

How many centimeters are in one meter?

Accepted Answer

$$100 cm$$

Question 14

How many millimeters are in one centimeter?

Accepted Answer

$$10 mm$$

Question 15

How many seconds are there in $$8.0$$ hours?

Accepted Answer

$$28,800 s$$

Question 16

What is the density of a cube that has a mass of $$100.0 g $$and is a cube that is $$5.00 cm on $$each side?

Accepted Answer

$$0.80 g/cm$^3$$

Question 17

How many calories of energy are required to increase the temperature of $$25$$ grams of water from $$10^\circC to$$ $$50^\circC$$? (Specific heat of water = $$1$$ cal/g$$\cdot$$°C)

Accepted Answer

$$1000$$ cal

Question 18

A 6-year-old was diagnosed with a sinus infection. She weighs $$52.0$$ lbs. If the recommended pediatric dose of amoxicillin is $$8.50 mg $$per kg, how many mg should she have in a day? (1 kg = 2.2 lbs)

Accepted Answer

$$201 mg$$

Introductory Chemistry Exam Study Guide with Step-by-Step Guidance

Guida di studio - Domande di pratica

Study guide - Flashcard