Atoms and Molec...

The average relative atomic mass of chlorine is 35.45. It consists of two naturally occurring isotopes chlorine-35 and chlorine-37. What is the fractional abundance of chlorine-37?

The average molecular mass of a mixture of gas containing nitrogen and carbon dioxide is 36. The mixture contains 280 g of nitrogen. Therefore, the amount of $${ CO }_{ 2 }$$ present in the mixture is :

Which among the following is true about one mole of a gas?

$$2.40\  g$$ of the chloroplatinate of a mono acid-base on ignition gave $$0.8\  g$$ of platinum. Calculate the molecular weight of the base. (Given the atomic weight of $$Pt = 195\ g/mol$$).

$$0.3$$ g of chloroplatinic acid of an organic diacidic base left $$0.09$$ g of platinum on ignition. The molecular weight of the organic base is :

A glass vessel weighs $$50$$ g when empty, $$148.0$$ g when completely filled with liquid of density $$0.98 g\ { ml }^{ -1 }$$ and  $$50.5$$ g when filled with an ideal gas at $$760$$ mm of Hg at $$300$$ K. Determine the molecular weight of the gas.

What is the molar mass of diacidic organic Lewis base, if $$12$$ g of chloroplatinate salt on ignition produced $$5$$ g residue?

The percentage by mole of $${ NO }_{ 2 }(g)$$ in a mixture of $${ NO }_{ 2 }(g)$$ and $$NO(g)$$ having average molecular mass 34 is :

Which of the following statements is correct about the reaction given below?
$$\displaystyle 4Fe\left ( s \right )+3O_{2}\left ( g \right )\rightarrow 2Fe_{2}O_{3}\left ( g \right )$$

Which of the following is a suitable example for illustrating the law of conservation of mass?