There are $6.02 \times 10^{22}$ molecules each of $N_2$,$O_2$,and $H_2$ which are mixed together at $760 \ mm$ and $273 \ K$. The mass of the mixture in grams is:

What is the total number of neutrons present in $1.7 \ g$ of ammonia $(NH_3)$?

The total number of electrons present in $18 \ mL$ water (density $= 1 \ g/mL$) is

Which of the following has the largest number of atoms?

Find the number of hydrogen atoms present in $6.0 \ g$ of urea $(NH_2CONH_2)$:

If the market prices of table salt $(NaCl)$ and table sugar $(C_{12}H_{22}O_{11})$ are $Rs. 4$ per $kg$ and $Rs. 30$ per $kg$ respectively,then the market price of $1$ mole of each will be,respectively,..... $Rs$.