Question

Which of the following statements is/are correct?
a. $1$ mole of $CH_4$ and $17\, g$ of $NH_3$ occupy same volume at $NTP$
b. $2$ moles of $K$ weight less than that of $1$ mole of $Ag$
c. $1$ atom of silver weights $\frac{108}{6.022\,\times\,10^{23}} g$
d. $1$ amu of $CO_2$ is $6.023 \times 10^{23}$ times heavier than $1$ molecule of $CO_2$

• A. a, b & c
• B. a, b & d
• C. b, c & d
• D. a, c & d

Answer 1

Answer: (A)

a. $17$ $g$ of $NH_3 = 1$ mole
b. Atomic weight of $K = 39$, so $2$ mole $K = 74$ $g$
c. Atomic weight of $Ag = 108$,
So $1$ mol $Ag = 108$ $g$
d. $44$ amu of $CO_2 = 1$ molecule
$1$ amu of $CO_2$ $\frac{1}{44}$ molecules