Total number of electrons present in `48g Mg^(2+)` are :

The total number of electrons present in 18 mL of water (density of water is 1 g mL^(-1) is:

The total number of neutrons present in 54mL H_2O(l) are :

The total number of neutrons present in 54mL H_2O(l) are :

Calculate the total number of electrons present in 1.6 g of methane

Mg is present in

The number of electrons present in 3d of Cu^(o+) is

The number of electrons present in -1 C of charge is

The number of electrons present in 3d of Cu^(o+) is

Calculate the total number of electrons present in 3.2 g of oxygen gas.

(i) Calculate the total number of electrons present in 1 mole of methane . (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of .^(14) C . (Assume that mass of a neutron = 1 . 6 75 xx 10 ^(-27) g) (iii) Find (a) the total number of protons and (b) the total mass of protons in 32 mg of NH_3 at STP . ( mass of proton = 1 . 6 72 xx 10^(-27) g) Will the answer change if the temperature and pressure are changed ?