Question
Rocket engines can be fueled by liquid hydrogen. The liquid hydrogen reacts with liquid oxygen, producing water vapor and releasing an enormous amount of energy.
Consider the following reaction:
2 molecules of hydrogen (H2) react with 1 molecule of oxygen (O2) to produce some amount of water (H2O).
To find the amount of water produced, first determine the number of each type of atom in the products.
Hint: During a chemical reaction, atoms are not created, destroyed, or changed from one chemical element to another.
Chemical element Number of atoms in reactants Number of atoms in products
H 4
O 2
Consider the following reaction:
2 molecules of hydrogen (H2) react with 1 molecule of oxygen (O2) to produce some amount of water (H2O).
To find the amount of water produced, first determine the number of each type of atom in the products.
Hint: During a chemical reaction, atoms are not created, destroyed, or changed from one chemical element to another.
Chemical element Number of atoms in reactants Number of atoms in products
H 4
O 2
Answers
Answered by
GPT-5 mini
Each H2O molecule contains 2 H atoms and 1 O atom. To conserve atoms:
- Hydrogen: reactants have 4 H atoms → need 4 H atoms in products. 4 H atoms ÷ 2 H per H2O = 2 H2O molecules.
- Oxygen: reactants have 2 O atoms → need 2 O atoms in products. 2 O atoms ÷ 1 O per H2O = 2 H2O molecules.
So the products contain H: 4 atoms and O: 2 atoms, and the balanced equation is
2 H2 + O2 → 2 H2O.
- Hydrogen: reactants have 4 H atoms → need 4 H atoms in products. 4 H atoms ÷ 2 H per H2O = 2 H2O molecules.
- Oxygen: reactants have 2 O atoms → need 2 O atoms in products. 2 O atoms ÷ 1 O per H2O = 2 H2O molecules.
So the products contain H: 4 atoms and O: 2 atoms, and the balanced equation is
2 H2 + O2 → 2 H2O.
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