$$1 \text{ in} = 2.54 \text{ cm}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

A combination of two or more elements in fixed proportions.

Question 2

Which physical state of matter has molecules that are closely packed together in fixed positions?

Accepted Answer

Solid

Question 3

What is the SI base unit for temperature?

Accepted Answer

Kelvin

Question 4

Convert 1 kilogram to milligrams using SI prefixes.

Accepted Answer

$$1 	imes 10^6$ mg

Question 5

A solution has a density of $$4.23 	ext{ g/mL}. $$What is the mass of 25 mL of this solution?

Accepted Answer

$$105.75 	ext{ g}$$

Question 6

Which of the following numbers has four significant figures?

Accepted Answer

5.007

Question 7

What is the temperature in Fahrenheit of a human body at $$37.2^{\circ}C$?

Accepted Answer

$$99.0^{\circ}F$

Question 8

Which statement about accuracy and precision is correct?

Accepted Answer

Accuracy refers to the closeness of a measurement to the true value, while precision refers to the closeness of repeated measurements to each other.

Question 9

How many significant figures are in the number $$0.03500$$?

Accepted Answer

4

Question 10

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad

Question 11

Express $$0.000418 in $$scientific notation.

Accepted Answer

$$4.18 	imes 10$$^{-4}$$

Question 12

When adding $$23.4$$, $$2.4$$, and $$0.24$$, how many decimal places should the answer have?

Accepted Answer

1

Question 13

Which conversion factor would you use to convert centimeters to inches?

Accepted Answer

$$1 	ext{ in} = 2.54 	ext{ cm}$$

Question 14

A rod is $$7.89$$ meters long. Convert its length to inches. ($$1 	ext{ in} = 2.54 	ext{ cm})$$

Accepted Answer

$$311 	ext{ in}$$

Question 15

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 16

What is the density of a sample with a mass of $$100 	ext{ g}$$ and a volume of $$25 	ext{ mL}$$?

Accepted Answer

$$4.0 	ext{ g/mL}$$

Question 17

Which element has the symbol 'Na'?

Accepted Answer

Sodium

Question 18

Which statement about scientific notation is correct?

Accepted Answer

The number before the power of ten must be between 1 and 10.

Question 19

If the leftmost non-significant digit is 5 or greater, what should you do when rounding?

Accepted Answer

Round up

Question 20

Which of the following is a pure substance?

Accepted Answer

Salt (NaCl)

Introduction to Matter, Measurement, and Scientific Calculations in Chemistry

Study Guide - Practice Questions