MHT CET · Chemistry · Some Basic Concepts of Chemistry
Which of the following species has highest mass?
- A \(1 \mathrm{~g}\) atom of carbon
- B \(3.011 \times 10^{23}\) atoms of oxygen
- C \(10 \mathrm{~mL}\) of water at room temperature
- D \(\frac{1}{2}\) mole of \(\mathrm{CH}_4\)
Answer & Solution
Correct Answer
(A) \(1 \mathrm{~g}\) atom of carbon
Step-by-step Solution
Detailed explanation
Mass of \(1 \mathrm{~g}\) atom of carbon \(=12 \mathrm{~g}\)
\(3.011 \times 10^{23}\) atoms of oxygen \(=0.5 \mathrm{~mol}\) atom
\(\begin{aligned} & =0.5 \times 16=5 \mathrm{~g} \\ & 10 \mathrm{ml} \mathrm{H}_2 \mathrm{O}=10 \mathrm{~g} \mathrm{H}_2 \mathrm{O} \\ & \frac{1}{2} \mathrm{~mol} \mathrm{CH}_4=\frac{1}{2} \times 16=8 \mathrm{~g}\end{aligned}\)
\(3.011 \times 10^{23}\) atoms of oxygen \(=0.5 \mathrm{~mol}\) atom
\(\begin{aligned} & =0.5 \times 16=5 \mathrm{~g} \\ & 10 \mathrm{ml} \mathrm{H}_2 \mathrm{O}=10 \mathrm{~g} \mathrm{H}_2 \mathrm{O} \\ & \frac{1}{2} \mathrm{~mol} \mathrm{CH}_4=\frac{1}{2} \times 16=8 \mathrm{~g}\end{aligned}\)
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