Question 1

Which of the following best describes a chemical change?

Accepted Answer

Iron rusting when exposed to air

Question 2

A sample of matter is uniform throughout and cannot be separated into simpler substances by physical means. Which classification best fits this sample?

Accepted Answer

Element

Question 3

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Saltwater

Question 4

Which of the following statements about the states of matter is correct?

Accepted Answer

A solid has a definite shape and volume.

Question 5

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

Accepted Answer

Na

Question 6

Which of the following best represents a chemical reaction?

Accepted Answer

$$ \mathrm{H_2O(l)} \rightarrow \mathrm{H_2$(g)} + \mathrm{O_2$(g)} $$

Question 7

A student measures the mass of a sample as 0.000215 g. Express this value in scientific notation.

Accepted Answer

$$ 2.15 	imes 10$$^{-4}$$  g$$

Question 8

Which of the following is a derived SI unit?

Accepted Answer

Gram per cubic centimeter $$(g/cm^3)$$

Question 9

Which prefix represents a factor of $$ 10$$^{-6}$$ $$?

Accepted Answer

Micro-

Question 10

A patient’s blood sample has a volume of 5.0 mL. What is this volume in liters?

Accepted Answer

$$ 5.0 	imes 10$$^{-3}$$  L$$

Question 11

Which of the following is a physical property?

Accepted Answer

Color

Question 12

Which of the following best describes the scientific method?

Accepted Answer

A process involving observation, hypothesis, and experiment

Question 13

Which of the following is a compound?

Accepted Answer

Sodium chloride ($$ \mathrm{NaCl} )$$

Question 14

A student needs to convert 2.5 kilometers to meters. What is the correct conversion?

Accepted Answer

$$ 2.5 	imes 10^3$  m$$

Question 15

Which of the following is NOT a property used to identify a substance?

Accepted Answer

Shape of the container

Question 16

Which of the following is a correct statement about elements and compounds?

Accepted Answer

Compounds can be broken down into elements by chemical reactions.

Question 17

A sample of water is electrolyzed to produce hydrogen and oxygen gases. Which of the following best describes this process?

Accepted Answer

Chemical change

Question 18

Which of the following is the correct way to write 0.000000120 m using scientific notation?

Accepted Answer

$$ 1.20 	imes 10$$^{-7}$$  m$$

Question 19

Which of the following is a heterogeneous mixture?

Accepted Answer

Vanilla ice cream with chocolate chips

Question 20

Which of the following is the correct chemical formula for a compound containing 2 hydrogen atoms and 1 oxygen atom?

Accepted Answer

$$ \mathrm{H_2O} $$

Chapter 1: Matter and Measurements – Fundamentals of General, Organic, and Biological Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard