A dot cointaining carbon has 1 microgram weight. Calculate number of carbon atoms used to make the dot.

Calculate number of atoms in 1 mole of nitrogen (N2)

In three moles of ethane. calculate the number of moles of carbon atoms.

Calculate the number of atoms in 0.25 mole atoms of carbon

Calculate number of atoms in 1 mole of phosphorous (P4)

Which allotrope of carbon is used in making electrodes ?

Chlorophyll, the green colouring matter of plant contains 2.68% of magnesium by weight. Calculate the number of magnesium atom in 2.0g chlorophyll.

2 xx 10^(8) atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 2.4 cm.

A ballon has 5.0 g mole of helium at 7^@C calculate the number of atoms of helium in the ballon.

Calculate the number of electron, proton and neutron in carbonate ion .