Gen Chem 1 Exam 1 Review

Elements

100

The number of neutrons in Carbon-14. 

8

200

The element Neon is correctly classified as a 

Noble Gas

300

These particles carry a negative charge

Electrons

400

Name the 7 groups on the periodic table

• The Alkali Metals.
• The Alkaline Earth Metals.
• The Transition Metals.
• The Metalloids.
• Other Metals.
• The Non-metals.
• The Halogens.
• The Noble Gases.

500

The element carbon has two stable isotopes. Carbon-12 and carbon-13. What is the natural abundance of each isotope approximately? 

99 % Carbon 12 

1 % Carbon 13

Calculations

100

The number of sig figs in this number. 

1.0090

5

200

Give the correct number of sig figs with units

974.59 m2 / 14.2 m=

68.6 m

300

Convert 7 gigameters to centimeters

700000000000

400

Balance the following equation and solve this problem.

__C8H18 + __ O2 ----> __CO2 +  __H2O

If the reaction produces 5.3 mg of carbon dioxide how many grams of water are produced?  

2.4e-3 g H2O

500

CH4 + 2 H2O -----> 4 H2(g) + CO2(g)

How many liters of hydrogen can be produced from the reaction of 80.0 g of CH4 and 16.3 g of water? What is the limiting reactant?

Can make a LOT more hydrogen with the carbon tetrahydride, so the carbon tetrahydride is in excess and the water is limiting. You make 40.5 L Hydrogen.

Yield of a chemical reaction

100

Define theoretical yield

Maximum amount of product possible given the quantities of reactants 

200

Give the percent yield equation.

(actual yield/ Theoretical yield) x 100% = % yield

300

Balance the following formula

__Fe2O3 + ___ C ------> ___ Fe +  ___CO2

 2 Fe2O3 + 3 C ------> 4 Fe + 3 CO2

400

Actual yield: 4.00 g 

Theoretical yield: 5.56

Calculate percent yield

71.9%

500

15.4 g of methanol (CH3OH 32.042 g/mol) reacts completely according to the following reaction: 

CH3OH (g) --------> CH2O (g) + H2 (g)

If 12.35 g of formaldehyde (30.026 g/mol) is produced, what is the percent yield for this reaction? 

85.8%

Naming

100

What type of compound is KCl?

ionic

200

Give the name for Si4O2

Tetrasilicon dioxide

300

Give the formula for Magnesium Nitrate

Mg(NO3)2

400

Give the name for H2SO3

Sulfurous acid

500

How do you know if an acid should end in -ic or -ous?

ate - ic 

ite- ous

Mystery

100

When a gas goes to a solid that is called....

desposition

200

How many moles of POCl4 are in 14.5 kg of POCl4?

76.8 moles

300

A compound is found to contain 63.52 % iron and 36.48% sulfur. Find its empirical formula.

FeS

400

What are the possible charges of Nickel?

2+, 3+

500

Zinc reacts with hydrochloric acid according to the reaction equation:

_____Zn (s) + _____ HCl (aq) --> _____ ZnCl2 (aq) + _____ H2 (g)

a. When 6.45 g of HCl are reacted with excess Zn(s), how many grams of ZnCl2

are produced?

12.1 grams ZnCl2