Atoms and Molecules Quiz 4

Valency of Carbon is ……

A positively charged ion is called ……

A negatively charged ion is called ………

In $NH_4OH$ the anion is ….

Standard reference for measuring atomic masses of other elements is

The number of times one atom of given element is heavier than 1/12th part of atomic mass of carbon – 12 is called as ……

Atomic mass of Magnesium is ……

Formula of silver nitrate ……

Molecular mass of sodium carbonate is …… U.

Avogadro constant NA = …

Molar mass of water = …… u.

Number of particles present in 32 g of oxygen molecule are ……

Number of moles of 22g of carbon dioxide is ……

The valency of Copper in $Cu_2O$ is ……

Number of particles in 7.75 g of phosphorous is ………