Question

1. for every unit of oxygen collected, how many units of hydrogen gas were collected?

2
1
3
4

1. true or false, this is the correct balanced equation for the burning of hydrogen in oxygen

2h₂(g) + o₂(g) → 2h₂o(l)
true
false

Explanation:

Question 1

Step1: Recall the reaction

The reaction for hydrogen burning in oxygen is \(2\text{H}_2(\text{g}) + \text{O}_2(\text{g})
ightarrow 2\text{H}_2\text{O}(\text{l})\). From the balanced equation, the mole ratio (or unit ratio) of \(\text{H}_2\) to \(\text{O}_2\) is \(2:1\). So for 1 unit of \(\text{O}_2\), we have 2 units of \(\text{H}_2\).

Step1: Check atom balance

For the equation \(2\text{H}_2(\text{g}) + \text{O}_2(\text{g})
ightarrow 2\text{H}_2\text{O}(\text{l})\):

• Hydrogen: Left side has \(2\times2 = 4\) H atoms, right side has \(2\times2 = 4\) H atoms.
• Oxygen: Left side has \(2\) O atoms, right side has \(2\times1 = 2\) O atoms.

So the equation is balanced.

Answer:

A. 2

Question 2