Question

calculate the percent composition of hydrogen in ammonium sulfide.
10.1%
25.3%
17.9%
11.8%
question 4
1 pts
a 0.356 gram sample of acetylene, c₂h₂ was found to have the following
percent composition of carbon and hydrogen:
element number mass percent composition
h 2 1.0079 7.7%
c 2 12.01 92.3%
how many grams of carbon are present in a 100 gram sample of acetylene?
24.02 g
there is insufficient information
36.6 g
92.3 g

Explanation:

Step1: Use the percent composition formula

The formula for mass of an element in a sample is \(m=\text{Percent Composition}\times\text{Mass of sample}\).

Step2: Substitute the values

Given percent composition of carbon is \(92.3\%\) (or \(0.923\) in decimal) and mass of sample \(m_{sample} = 100\space g\). Then \(m_{C}=0.923\times100\space g\).

Answer:

\(92.3\space g\)