CHAPTER 7 REVIEW

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CHAPTER 6 PRACTICE TEST

Chemical Formulas and Chemical Compounds

Always show your work!

MIXED REVIEW

1.Write formulas for the following compounds. Do your work in the space to the right below.

a.copper(II) sulfate

b.sodium sulfide

c.c calcium cyanide

d.tin (IV) oxide

e.nitrous acid

__________________ f. sodium carbonate decahydrate (a hydrate!)

__________________ g. carbonic acid = hydrogen carbonate

__________________ h. aluminum hydroxide

__________________ i. carbon tetrafluoride (covalent)

__________________ j. diphosphorous pentasulfide (covalent)

2.Use Roman Numerals to name the following compounds:

a.Cu(ClO4)2

b.Fe(NO3)2

c.Fe(NO2)3

d.CoS

e.SnO2

3.a.What is the molar mass, in grams, of Ca(HSO4)2?

b.How many grams are in a 0.50 mole sample of this compound?

4. Write formulas and find the formula mass (in amu) for:     silicon (IV) bromide

     nickel (II) hydroxide

5.a.What is the formula for magnesium hydroxide?

b.What is the molar mass of magnesium hydroxide?

c.What is the mass in grams of 0.25 mol of magnesium hydroxide?

____________________d. How many moles are in 5.00 grams of magnesium hydroxide?

6.What is the percentage composition of each element in octane gas, C8H18?

How many molecules of octane are in 5.25 grams of octane?

What is the empirical formula of octane?

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Modern Chemistry62Chemical Bonding