Questions: In the reaction 2 H2O -> 2 H2 + O2, 2.0 mol water will produce how many grams of O2? 16 32 36 64 Which of the following reactions is correctly balanced? N2 + H -> 2 NH3 2 H2O + C -> CO + 2 H2

In the reaction 2 H2O -> 2 H2 + O2, 2.0 mol water will produce how many grams of O2?
16
32
36
64

Which of the following reactions is correctly balanced?
N2 + H -> 2 NH3
2 H2O + C -> CO + 2 H2

Transcript text: In the reaction $2 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{H}_{2}+\mathrm{O}_{2}, 2.0 \mathrm{~mol}$ water will produce how many grams of $\mathrm{O}_{2}$ ? 16 32 36 64 Which of the following reactions is correctly balanced? $\mathrm{N}_{2}+\mathrm{H} \rightarrow 2 \mathrm{NH}_{3}$ $2 \mathrm{H}_{2} \mathrm{O}+\mathrm{C} \rightarrow \mathrm{CO}+2 \mathrm{H}_{2}$

Solution

Solution Steps

Step 1: Identify the given information

We are given the reaction: \[ 2 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{H}_{2} + \mathrm{O}_{2} \] and we need to determine how many grams of $\mathrm{O}_{2}$ are produced from 2.0 moles of water.

Step 2: Determine the molar ratio

From the balanced chemical equation, we see that 2 moles of $\mathrm{H}_{2}\mathrm{O}$ produce 1 mole of $\mathrm{O}_{2}$.

Step 3: Calculate moles of $\mathrm{O}_{2}$

Given 2.0 moles of $\mathrm{H}_{2}\mathrm{O}$, we use the molar ratio to find the moles of $\mathrm{O}_{2}$: \[ \text{Moles of } \mathrm{O}_{2} = \frac{2.0 \text{ moles of } \mathrm{H}_{2}\mathrm{O}}{2} = 1.0 \text{ mole of } \mathrm{O}_{2} \]

Step 4: Convert moles of $\mathrm{O}_{2}$ to grams

The molar mass of $\mathrm{O}_{2}$ is $32.00 \text{ g/mol}$. Therefore, the mass of 1.0 mole of $\mathrm{O}_{2}$ is: \[ \text{Mass of } \mathrm{O}_{2} = 1.0 \text{ mole} \times 32.00 \text{ g/mol} = 32.00 \text{ g} \]

Final Answer

$\boxed{32 \text{ g}}$

Step 1: Identify the given reactions

We need to determine which of the following reactions is correctly balanced:

$\mathrm{N}_{2} + \mathrm{H} \rightarrow 2 \mathrm{NH}_{3}$
$2 \mathrm{H}_{2} \mathrm{O} + \mathrm{C} \rightarrow \mathrm{CO} + 2 \mathrm{H}_{2}$

Step 2: Check the balance of each reaction

For $\mathrm{N}_{2} + \mathrm{H} \rightarrow 2 \mathrm{NH}_{3}$:
- Reactants: 2 N, 1 H
- Products: 2 N, 6 H
- This reaction is not balanced.
For $2 \mathrm{H}_{2} \mathrm{O} + \mathrm{C} \rightarrow \mathrm{CO} + 2 \mathrm{H}_{2}$:
- Reactants: 2 H, 2 O, 1 C
- Products: 2 H, 1 O, 1 C
- This reaction is not balanced.

Final Answer

None of the given reactions are correctly balanced.

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