Calculate the mass of `CaCO_3` formed when `CO_2` gas is passed into a solution containing 3.7 gm of calcium hydroxide.

0.46 gm of sodium metal on reaction with an acid gave 1.64 gm of sodium salt.  Calculate the equivalent weight of a…

How many molecules of water are present in 1 ml of water?

0.383 g of metal on reaction with an acid displace 131 cc of dry `H_2` at STP. The specific heat of metal is o.1. The ex…

Calculate the mass of `CaCl_2` formed when 5 gm of `CaCO_3` is added to 200 ml of 1M HCl solution.

Vapour density of a volatile substance is 4 in comparison to methane. Its molecular weight is:

The equivalent weight of divalent metal is 12. Find the molecular weight of the metal oxide.

A sample of oxygen consists of three isotopes O-16,O-17 and 0-18 in the relative abundance of 99.76% , 0.04% an 0,20% re…