Question 1

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$5.2 	imes 10^{-4}$

Question 2

How many significant figures are in the measurement $0.02030$ g?

Accepted Answer

4

Question 3

A student measures the mass of a sample as $12.30$ g and its volume as $4.1$ mL. What is the density of the sample, reported with the correct number of significant figures?

Accepted Answer

$3.0$ g/mL

Question 4

Which of the following is the correct conversion factor for converting kilometers to meters?

Accepted Answer

$1 \ \mathrm{km} = 1000 \ \mathrm{m}$

Question 5

Which of the following statements best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically bonded in fixed ratios

Question 6

Which element is a metalloid?

Accepted Answer

Silicon

Question 7

What is the charge on an ion formed by a Group 2A (alkaline earth metal) element?

Accepted Answer

$+2$

Question 8

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$(NH_4)_2SO_4$

Question 9

How many moles are in $18.0$ g of water ($H_2O$)? (Molar mass of $H_2O = 18.0$ g/mol)

Accepted Answer

$1.0$ 	ext{ mole}$

Question 10

A chemical reaction has a theoretical yield of $10.0$ g and an actual yield of $8.0$ g. What is the percent yield?

Accepted Answer

$80\%$

Question 11

Which of the following is a strong electrolyte?

Accepted Answer

Hydrochloric acid ($HCl$)

Question 12

What is the molarity of a solution prepared by dissolving $5.0$ moles of NaCl in $2.0$ liters of solution?

Accepted Answer

$2.5$ 	ext{ M}$

Question 13

Which of the following best describes the difference between a mixture and a compound?

Accepted Answer

A mixture can be separated by physical means, a compound cannot

Question 14

Which of the following ions is polyatomic?

Accepted Answer

$NO_3^-$

Question 15

What is the empirical formula for a compound containing $40.0\%$ carbon, $6.7\%$ hydrogen, and $53.3\%$ oxygen by mass?

Accepted Answer

$CH_2O$

Question 16

A solution is prepared by diluting $50.0$ mL of $6.0$ M HCl to a final volume of $300.0$ mL. What is the final concentration?

Accepted Answer

$1.0$ 	ext{ M}$

Question 17

Which of the following is the correct balanced equation for the reaction of hydrogen gas with oxygen gas to form water?

Accepted Answer

$2H_2 + O_2 \rightarrow 2H_2O$

Question 18

Which of the following statements about metals is correct?

Accepted Answer

Metals are malleable and ductile

Question 19

How many atoms are in $2.00$ moles of carbon?

Accepted Answer

$1.20 	imes 10^{24}$

Question 20

Which of the following is the correct name for $FeCl_3$?

Accepted Answer

Iron(III) chloride

General Chemistry Study Notes: Measurement, Atoms, Molecules, and Mass Relationships

Study Guide - Practice Questions

Study Guide - Flashcards