Question 1

Which of the following elements is a noble gas and has the atomic symbol $$\mathrm{Xe}$$?

Accepted Answer

Xenon

Question 2

A sample of a compound has a mass of $$25.0\ \mathrm{g}$$ and a volume of $$10.0\ \mathrm{mL}. $$What is its density?

Accepted Answer

$$2.50\ \mathrm{g/mL}$$

Question 3

Which of the following ions has a $$+2$$ charge and is commonly found in Group 2 of the periodic table?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$

Question 4

Which process describes the conversion of a solid directly into a gas?

Accepted Answer

Sublimation

Question 5

How many moles are present in $$18.0\ \mathrm{g} of $$water ($$\mathrm{H_2O}$$)? (Molar mass of $$\mathrm{H_2O} is$$ $$18.0\ \mathrm{g/mol})$$

Accepted Answer

$$1.00\ \mathrm{mol}$$

Question 6

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

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 7

A mixture contains $$3.0\ \mathrm{mol} of$$ $$\mathrm{NaCl}$$ and $$2.0\ \mathrm{mol} of$$ $$\mathrm{KBr}. $$What is the total number of formula units present?

Accepted Answer

$$5.0\ \mathrm{mol}$$

Question 8

Which isotope of carbon has 7 neutrons?

Accepted Answer

$$\mathrm{^{13}C}$$

Question 9

What is the correct name for the compound $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 10

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 11

A student needs to convert $$500\ \mathrm{mg} to $$grams. What is the correct value?

Accepted Answer

$$0.500\ \mathrm{g}$$

Question 12

Which element is in Group 1 and is essential for nerve function in humans?

Accepted Answer

Potassium

Question 13

What is the total number of protons in an atom of $$\mathrm{Ag} ($$silver)?

Accepted Answer

$$47$$

Question 14

Which of the following best describes the process of condensation?

Accepted Answer

Gas to liquid

Question 15

A compound contains $$2$$ atoms of hydrogen, $$1$$ atom of oxygen, and $$1$$ atom of sulfur. What is its chemical formula?

Accepted Answer

$$\mathrm{H_2SO}$$

Question 16

Which of the following conversions is correct for $$1.5\ \mathrm{kg} to $$grams?

Accepted Answer

$$1500\ \mathrm{g}$$

Question 17

What is the molecular mass of $$\mathrm{CO_2$}$$? (C: $$12.0\ \mathrm{g/mol}$$, O: $$16.0\ \mathrm{g/mol})$$

Accepted Answer

$$44.0\ \mathrm{g/mol}$$

Question 18

Which of the following is the correct name for $$\mathrm{$$HNO_3$$}$$?

Accepted Answer

Nitric acid

Question 19

A neutral atom of $$\mathrm{Ne} ($$neon) has how many electrons?

Accepted Answer

$$10$$

Question 20

Which of the following is a correct statement about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

General Chemistry Study Guide: Periodic Table, Atomic Structure, and Chemical Calculations

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