Atoms and Molec...

Specific volume of cylindrical virus particle is $$6.02 \times {10^{ - 2}}\,\,cc/gm$$ whose radius and length are 7 A and 10 A respectively. If $${N_A} = 6.02 \times {10^{23}}.$$ Find molecular weight of virus.

The number of electrons in $$3.1\ mg\ NO_{3}^{-}$$ is ______.

Arrange the following in order of decreasing masses:

The number of moles in $$ 1.6 \times 10^4 $$ grams of $$ Ca(OH)_2 $$ are

The present atomic weight scale is based on :-

The weight of sulphuric acid needed for dissolving $$3 \mathrm { gm }$$ magnesium carbonate is:

The relative formula mass $$(M_{r})$$ of calcium carbonate $$(CaCO_{3})$$ is $$100$$. What is the mass of carbon present in $$100\ g$$ of calcium carbonate?

A compound contains $$7$$ carbon atoms, $$2$$ oxygen atoms and $$9.96\times 10^{-24}\,g$$ of other elements. The molecular mass of compound is $$(N_A =6\times 10^{23})$$

The volume of one mole of water at $$277\ K$$ is $$18\ ml$$. One $$ml$$ of water contains $$20$$ drops. The number of molecules in one drop of water will be $$(N_{A}=6\times 10^{23})$$

For $$CuSO_4.5H_2O,$$ which is the correct mole relationship?