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# chemistry

### Resolved Question:

1.     Balance the following equation:
___NH3 + ___O2 ? ___NO2 + ___H2O

2.     Write a balanced equation for the combustion of acetaldehyde, CH3CHO.

3.     Balance the following equation with the SMALLEST WHOLE NUMBER COEFFICIENTS possible. Select the number that is the sum of the coefficients in the balanced equation:
___KClO3 ? ___KCl + ___O2

4.     Write a balanced equation for the combustion of propane, C3H8.

When properly balanced, the equation indicates that ___ moles of O2 are required for each mole of C3H8.

5.     What is the total mass of products formed when 16 grams of CH4 is burned with excess oxygen?

6.     Calculate the mass of hydrogen formed when 25 g of aluminum reacts with excess hydrochloric acid.
2Al + 6HCl ? 2 AlCl3 + 3 H2

7.     How many grams of the mixed oxide, Fe3O4, are formed when 6.00 g of O2 react with Fe according to 3Fe + 2O2 ? Fe3O4

8.     For the reaction:
2MnO2 + 4KOH + O2 + Cl2 ?
2KMnO4 + 2KCl + 2H2O
there is 100. g of each reactant available. Which reagent is the limiting reagent?
[Molar Masses: MnO2=86.9; KOH=56.1; O2=32.0; Cl2=70.9]

9.     How many grams of nitric acid, HNO3, can be prepared from the reaction of 92.0 g of NO2 with 36.0 g H2O?
3NO2 + H2O ? 2HNO3 + NO

10.     How many grams of H2O will be formed when 16.0 g H2 is allowed to react with 16.0 g O2 according to
2H2 + O2 ? 2H2O?

1.     Balance the following equation:
___NH3 + ___O2 ? ___NO2 + ___H2O

2.     Write a balanced equation for the combustion of acetaldehyde, CH3CHO.

3.     Balance the following equation with the SMALLEST WHOLE NUMBER COEFFICIENTS possible. Select the number that is the sum of the coefficients in the balanced equation:
___KClO3 ? ___KCl + ___O2

4.     Write a balanced equation for the combustion of propane, C3H8.

When properly balanced, the equation indicates that ___ moles of O2 are required for each mole of C3H8.

5.     What is the total mass of products formed when 16 grams of CH4 is burned with excess oxygen?

6.     Calculate the mass of hydrogen formed when 25 g of aluminum reacts with excess hydrochloric acid.
2Al + 6HCl ? 2 AlCl3 + 3 H2

7.     How many grams of the mixed oxide, Fe3O4, are formed when 6.00 g of O2 react with Fe according to 3Fe + 2O2 ? Fe3O4

8.     For the reaction:
2MnO2 + 4KOH + O2 + Cl2 ?
2KMnO4 + 2KCl + 2H2O
there is 100. g of each reactant available. Which reagent is the limiting reagent?
[Molar Masses: MnO2=86.9; KOH=56.1; O2=32.0; Cl2=70.9]

9.     How many grams of nitric acid, HNO3, can be prepared from the reaction of 92.0 g of NO2 with 36.0 g H2O?
3NO2 + H2O ? 2HNO3 + NO

10.     How many grams of H2O will be formed when 16.0 g H2 is allowed to react with 16.0 g O2 according to
2H2 + O2 ? 2H2O?

Submitted: 10 years ago.
Category: Homework
Expert:  Sarah replied 10 years ago.