Question 1

Which of the following is the correct name for the compound $$\mathrm{Cr_2$(SO_4$)_3}$$?

Accepted Answer

Chromium(III) sulfate

Question 2

What is the correct formula for barium nitrite?

Accepted Answer

$$\mathrm{Ba(NO_2$)_2}$$

Question 3

A compound contains 62.04 g of C, 10.44 g of H, and 27.52 g of O. What is the empirical formula?

Accepted Answer

$$\mathrm{C_3H_6O}$$

Question 4

Which of the following is a molecular compound?

Accepted Answer

Phosphorus trichloride

Question 5

What is the molar mass of $$\mathrm{CO_2$}$$?

Accepted Answer

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

Question 6

How many molecules are in 0.0153 moles of $$\mathrm{CO_2$}$$? (Use Avogadro's number $$6.022 	imes 10$$^{23}$$)

Accepted Answer

$$9.21 	imes 10$$^{21}$$

Question 7

A compound is found to contain 2.231 g of Se and 3.221 g of F. What is the empirical formula?

Accepted Answer

$$\mathrm{$$SeF_6$$}$$

Question 8

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

Accepted Answer

Titanium(II) sulfide

Question 9

What is the correct formula for potassium sulfide?

Accepted Answer

$$\mathrm{K_2S}$$

Question 10

Which of the following is the correct name for $$\mathrm{$$BeBr_2$$}$$?

Accepted Answer

Beryllium bromide

Question 11

If you have 6330 g of $$\mathrm{N_2O}$$, how many moles do you have? (Molar mass $$= 44.0\ \mathrm{g/mol})$$

Accepted Answer

$$144$$ moles

Question 12

Which of the following is a common mistake when naming molecular compounds?

Accepted Answer

Using Roman numerals to state the number of atoms

Question 13

What is the molecular formula of a compound with an empirical formula $$\mathrm{C_3H_6O}$$ and a molar mass of $$290.0\ \mathrm{g/mol}$$?

Accepted Answer

$$\mathrm{C$$_{21}$$H_{42}O_7$}$$

Question 14

Which of the following is the correct name for $$\mathrm{$$SbBr_3$$}$$?

Accepted Answer

Antimony tribromide

Question 15

Which process is used to determine the empirical formula from mass data?

Accepted Answer

Convert mass to moles, divide by the lowest number of moles, use as subscripts

Question 16

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 17

What is the correct formula for aluminum chloride?

Accepted Answer

$$\mathrm{$$AlCl_3$$}$$

Question 18

Which of the following is the correct name for $$\mathrm{$$VPO_4$$}$$?

Accepted Answer

Vanadium(III) phosphate

Question 19

Which of the following is the correct formula for selenium tetrafluoride?

Accepted Answer

$$\mathrm{$$SeF_4$$}$$

Introduction to Chemistry: Nomenclature, Formula Writing, and Mole Calculations Study Guide

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