Q: A patient receives a dose of medication that is $0.75 \ \text{mg}$. Express this mass in grams using the correct metric prefix.

$7.5 \times 10^{-4} \ \text{g}$

Question 1

Which of the following is the correct SI unit for temperature, and what is its abbreviation?

Accepted Answer

Kelvin, K

Question 2

A chemist needs to prepare 0.250 L of a solution. Express this volume in milliliters using the correct metric prefix.

Accepted Answer

$250 \ 	ext{mL}$

Question 3

Which of the following correctly matches the polyatomic ion with its formula?

Accepted Answer

Sulfate: $	ext{SO}_4^{2-}$

Question 4

A sample contains $3.01 	imes 10^{23}$ molecules of water. How many moles of water are present in the sample?

Accepted Answer

$0.500 \ 	ext{mol}$

Question 5

Which transition metal ion is correctly paired with its charge?

Accepted Answer

Zn: $2+$

Question 6

What is the correct name for the compound $	ext{N}_2	ext{O}_5$?

Accepted Answer

Dinitrogen pentoxide

Question 7

Convert $5.0 \ 	ext{cm}^3$ to milliliters.

Accepted Answer

$5.0 \ 	ext{mL}$

Question 8

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

Accepted Answer

$	ext{NH}_4^+$

Question 9

A solution contains $1.5 	imes 10^{-3}$ moles of sodium chloride. How many formula units of sodium chloride are present? (Use $1 \ 	ext{mol} = 6.022 	imes 10^{23}$ particles)

Accepted Answer

$9.03 	imes 10^{20}$

Question 10

Which of the following correctly matches the metric prefix with its meaning?

Accepted Answer

micro: $10^{-6}$

Question 11

Which of the following ions is polyatomic and carries a $2-$ charge?

Accepted Answer

Sulfate, $	ext{SO}_4^{2-}$

Question 12

Which of the following is the correct name for $	ext{CO}_2$?

Accepted Answer

Carbon dioxide

Question 13

A patient receives a dose of medication that is $0.75 \ 	ext{mg}$. Express this mass in grams using the correct metric prefix.

Accepted Answer

$7.5 	imes 10^{-4} \ 	ext{g}$

Question 14

Which of the following elements is a noble gas?

Accepted Answer

Neon

Question 15

What is the correct formula for the phosphate ion?

Accepted Answer

$	ext{PO}_4^{3-}$

Question 16

Which of the following transition metals can have a $3+$ charge?

Accepted Answer

Fe

Question 17

A laboratory procedure requires $0.0025 \ 	ext{kg}$ of a substance. Express this mass in milligrams.

Accepted Answer

$2.5 	imes 10^3 \ 	ext{mg}$

Question 18

Which of the following is the correct name for $	ext{P}_4	ext{O}_{10}$?

Accepted Answer

Tetraphosphorus decaoxide

Question 19

Which of the following is the correct formula for the dichromate ion?

Accepted Answer

$	ext{Cr}_2	ext{O}_7^{2-}$

Question 20

A solution contains $0.020 \ 	ext{mol}$ of sulfate ions. How many sulfate ions are present in the solution?

Accepted Answer

$1.2 	imes 10^{22}$

General Chemistry Exam 1 Study Guide: SI Units, Metric Prefixes, Naming, Ions, and Elements

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