What will be the mass of one atom of $^{12}C$ in grams?

In the standardization of $Na_2S_2O_3$ using $K_2Cr_2O_7$ by iodometry,the equivalent weight of $K_2Cr_2O_7$ is:

The oxide of a metal has $32\%$ oxygen. Its equivalent weight would be

The element whose $1$ atom has a mass of $10.86 \times 10^{-26} \ kg$ is

Many atoms have non-integral atomic masses because

The ratio of the mass of '$x$' atoms of an element to the mass of '$x$' carbon atoms is $9:1$. Find the molar mass of the element if the molar mass of carbon is $12 \text{ g/mol}$. (in $\text{ g/mol}$)