NAME: _____________________________

CHAPTER 3 ASSIGNMENT

The MOLE!

1. Find the molar mass of each compound.

- sulfuric acid, H2SO4 ___________

- Potassium bicarbonate, KHCO3 ___________

2. A sample of mercury(II) bromide, HgBr2, weighs 6.58 g. How many moles are in this sample? Show all calculations that were used to find the answer.

3. How many molecules are contained in 20.4 grams of chlorine gas, Cl2? Show all calculations that were used to find the answer.

4. What is the percent composition of each element in calcium sulfate, CaSO4 ? Show all calculations that were used to find the answer.

Ca __________ S _________ O ________

5. An organic compound is analyzed and found to be carbon 59.90%, hydrogen 9.80%, and chlorine 38.30%. What is the empirical formula of this compound? Show all calculations that were used to find the answer.

IONIC COMPOUNDS, MOLECULAR (COVALENT)COMPOUNDS & ORGANIC COMPOUNDS

6. When writing the name of an ionic compound that contains a transition metal, what do you have to include? What is the purpose of it?

7. Ionic Compound Formation & Naming: Given the following Cation and Anion elements, determine the formula and name.

**If the compound is in parenthesis, that means it is a polyatomic ion

Cation	Anion	Compound Formula	Ionic Name
Li+1	O-2
Ca+2	(NO3)-1
K+1	F-1
Ba+2	(OH)-1
Zn+2	(PO4)-3
Ni+2	Br-1

8. What is the one thing you have to include when writing the chemical name of a covalent compound? **this is different from ionic compounds**

9. Covalent Compound & Acids Formation & Naming: Given either the formula or name of a covalent compound or acid, fill in the rest of the blanks.

Formula	Name
	Carbon tetrachloride
SO3
	Hydroflouric Acid
BF3
	diphosphorous pentasulfide
HCN

10. Given the following formula or name, determine if it is an inorganic compound or an organic compound.

Formula or Name	Inorganic or Organic
C4H9
Calcium sulfide
LiF
CH3CH3
Heptane
Chromium (II) carbonate