Question

the 10.00 g sample contains 7.494 g c and 1.260 g h. how many grams of oxygen are in the carbohydrate sample?
? g o
do not round! include lots of digits in your answer since this is part of a larger calculation.

Explanation:

Step1: Recall total mass formula

The total mass of the sample is the sum of the masses of C, H, and O. So, \( m_{\text{total}} = m_{\text{C}} + m_{\text{H}} + m_{\text{O}} \). We can rearrange this to find \( m_{\text{O}} = m_{\text{total}} - m_{\text{C}} - m_{\text{H}} \).

Step2: Substitute the given values

We know \( m_{\text{total}} = 10.00 \, \text{g} \), \( m_{\text{C}} = 7.494 \, \text{g} \), and \( m_{\text{H}} = 1.260 \, \text{g} \). Plugging these into the formula: \( m_{\text{O}} = 10.00 - 7.494 - 1.260 \).

Step3: Perform the subtraction

First, \( 10.00 - 7.494 = 2.506 \). Then, \( 2.506 - 1.260 = 1.246 \).

Answer:

\( 1.246 \)