Question

in comparing the mass% of c in ch3cooh and ch2o, a mass% of c in ch3cooh is same as in ch2o b mass% of c in ch3cooh is higher than in ch2o c mass% of c in ch2o is higher than in ch3cooh d mass% of c in ch3cooh is indeterminate

Explanation:

Step1: Calculate molar mass of CH3COOH

The molar mass of C is 12 g/mol, H is 1 g/mol, and O is 16 g/mol. For CH3COOH (C₂H₄O₂), molar - mass \(M_{CH3COOH}=2\times12 + 4\times1+2\times16=60\) g/mol.

Step2: Calculate mass of C in CH3COOH

There are 2 C atoms in CH3COOH, so mass of C in CH3COOH is \(m_{C - CH3COOH}=2\times12 = 24\) g. Then mass% of C in CH3COOH is \(\frac{24}{60}\times100\% = 40\%\).

Step3: Calculate molar mass of CH2O

For CH2O, molar - mass \(M_{CH2O}=12 + 2\times1+16 = 30\) g/mol.

Step4: Calculate mass of C in CH2O

There is 1 C atom in CH2O, so mass of C in CH2O is 12 g. Then mass% of C in CH2O is \(\frac{12}{30}\times100\%=40\%\).

Answer:

A. mass% of C in CH3COOH is same as in CH2O