find the percent composition of cu₂s? %cu= 35...
find the percent composition of cu₂s? %cu= 35.946 %s= 64.054 %cu= 67.987 %s= 32.013 %cu= 79.854 %s= 20.145
Answer
# Explanation:
## Step1: Calculate molar mass of \(Cu_2S\)
Molar mass of \(Cu = 63.546\space g/mol\), molar mass of \(S=32.065\space g/mol\).
Molar mass of \(Cu_2S=(2\times63.546)+32.065 = 127.092 + 32.065=159.157\space g/mol\)
## Step2: Calculate percent composition of \(Cu\)
Percent composition of \(Cu=\frac{2\times63.546}{159.157}\times100=\frac{127.092}{159.157}\times100\approx67.987\%\)
## Step3: Calculate percent composition of \(S\)
Percent composition of \(S=\frac{32.065}{159.157}\times100\approx32.013\%\)
# Answer:
\(\%Cu = 67.987\), \(\%S=32.013\) (the blue - colored option)