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

Sulfate: $$\text{SO}_4$$^{2-}$$

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

Sulfate, $$\text{SO}_4$$^{2-}$$

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}$$ \ \text{g}$$

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

$$2.5 \times 10^3$ \ \text{mg}$$

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

$$\text{Cr}_2\text{O}_7$$^{2-}$$

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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