$\mathrm{SH} = \dfrac{\text{heat}}{\text{grams} \times \Delta T}$

Question 1

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

Accepted Answer

Salt dissolved in water

Question 2

Which statement best describes a compound?

Accepted Answer

A pure substance made of two or more elements chemically joined together

Question 3

How many atoms of hydrogen are present in one molecule of water ($\mathrm{H_2O}$)?

Accepted Answer

Two

Question 4

Which of the following is a physical change?

Accepted Answer

Melting ice

Question 5

A chemical equation must be balanced to satisfy which law?

Accepted Answer

Law of conservation of mass

Question 6

Which of the following is the correct conversion factor to convert 1.5 liters to milliliters?

Accepted Answer

$1 \mathrm{~L} = 1000 \mathrm{~mL}$

Question 7

Which number has three significant figures?

Accepted Answer

0.00450

Question 8

What is the density of a substance if its mass is $25.0 \mathrm{~g}$ and its volume is $10.0 \mathrm{~mL}$?

Accepted Answer

$2.50 \mathrm{~g/mL}$

Question 9

Which temperature is equivalent to $25.0^{\circ}\mathrm{C}$ in Kelvin?

Accepted Answer

$298.0~\mathrm{K}$

Question 10

A patient’s body temperature is measured at $102.2^{\circ}\mathrm{F}$. What is this temperature in Celsius?

Accepted Answer

$39.0^{\circ}\mathrm{C}$

Question 11

Which of the following best describes the arrangement and movement of particles in a gas?

Accepted Answer

Far apart, moving rapidly and randomly

Question 12

Which of the following is the correct formula for specific heat?

Accepted Answer

$\mathrm{SH} = \dfrac{	ext{heat}}{	ext{grams} 	imes \Delta T}$

Question 13

A medication is prescribed at $0.5~\mathrm{mg/kg}$ for a patient weighing $70~\mathrm{kg}$. What is the total dose?

Accepted Answer

$35~\mathrm{mg}$

Question 14

Which of the following is an example of a micronutrient essential for human health?

Accepted Answer

Iron

Question 15

Which of the following is true about specific gravity?

Accepted Answer

It is the ratio of the density of a sample to the density of water

Question 16

Which of the following numbers is correctly written in scientific notation with three significant figures?

Accepted Answer

$4.50 	imes 10^3$

Question 17

A sample has a mass of $8.0~\mathrm{g}$ and a volume of $2.0~\mathrm{mL}$. What is its specific gravity?

Accepted Answer

$4.0$

Question 18

Which of the following statements about energy is correct?

Accepted Answer

Potential energy is stored energy

Question 19

A nutrition label states that a serving contains $200~\mathrm{Cal}$. How many joules is this?

Accepted Answer

$836,800~\mathrm{J}$

Chapter 1: Chemistry Basics—Matter and Measurement (GOB Chemistry Study Notes)

Study Guide - Practice Questions