[A] A solid mixture weighing `5.00g` containing lead nitrate and sodium nitrate was heated below `600^(@)C` until the mass of the residue was constant. If the loss of mass is `28%` find the mass of lead nitrate and sodium nitrate in the mixture.

A solid mixture 5 g consists of lead nitrate and sodium nitrate was heated below 600^(@)C until weight of residue was constant. If the loss in weight is 28% find the amount of lead nitrate and sodium nitrate in mixture.

Find the mass of oxygen contained in 1 kg of potassium nitrate (KNO_(3)) .

A vessel of volume 20 L contains a mixture o hydrogen and helium at temperature of 27^(@)C and pressure 2.0 atm The mass of the mixture is 5 g . Assuming the gases to be ideal, the ratio of the mass of hydrogen to heat of helium in the given mixture will be