Question

# Using the periodic able, how many atoms are contained in one mole Using the periodic table, what is the mass of

1. of phosphorus? A. 15 B. 30.974 C. 1 million D. 6.022 x 1023
2. one mole of sulfur atoms? A. 32.065 amu B. 6.022 x 1023 g C. 16 amu D. 32.065 g
3. What is the mass of one atom of aluminum? A. 26.982 g B. 13 g C. 13 amu D. 26.982 amu
4. In the following reaction of sodium metal with water to produce sodium hydroxide and hydrogen gas, what coefficients should be placed in the blanks from left to right, when balancing? __Na + __H2O __NaOH + __H2
• A. 1; 1; 1; 1
• B. 1; 3; 2; 1
• C. 2; 2; 2; 1
• D. 1; 1; 1; 2

5.Below is an unbalanced equation for the combustion of methanol. What coefficients should be placed in the blanks from left to right when balanced? __CH3OH + __O2  __CO2 + ­­__H2O

• A. 2; 3; 2; 4
• B. 1; 2; 1; 2
• C. 3; 6; 4; 8
• D. 2; 1; 2; 3

6.The following unbalanced equation represents the formation of sulfuric acid, a highly corrosive compound found in acid rain. When the equation is balanced, which coefficient should be placed in front of SO2? __SO2 + __O2 + __H2O  __H2SO4

7.The following unbalanced chemical equation represents the combustion of butane (C4H10), a fuel used in lighters and portable stoves. What coefficient should be placed in front of C4H10, when balanced? __C4H10 + __O2 → __CO2 + __H2O

8.Choose the chemical reaction that accurately represents the combustion of methane (CH4).

A. CH+ 2 O2CO2 + 2 H2O

B. CH+ 2 H2OCO2 + 4 H2

C. CH4CO2 + 2 H2O

D. CO2 + 2 H2OCH4  + 2 O2