What pressure of `H_2` would be required to make the e.m.f of hydrogen elecrode zero in pure water at `25^@C`?

what volume of oxygen would be required to burn completely 400 ml of acetylene [C2H2]?

Determine the osmotic pressure of a solution prepared by dissolving 25 mg of K_2SO_4 in 2 litre of water at 25° C, assuming that it is completely dissociated.

Parveen wanted to make a temporary shelter for her car, by making a box-like structure with tarpaulin that covers all the four sides and the top of the car (with the front face as a flap which can be rolled up). Assuming that the stitching margins are very small, and therefore negligible, how much, tarpaulin would be required to make the shelter of height 2.5 m. with base dimensions 4 m x 3 m ?

What is phase difference between the e.m.f. and current is an a.c. circuit contains a pure capacitance?

Hydrogen and oxygen combine in the ratio of 1 :8 by mass to from water. What mass of oxygen gas would be required to react completely with 3g of hydrogen?

One mole of H_2 gas is contained in a box of volume V = 1.00 m^3 at T = 300 K . The gas is heated to a temperature of T = 3000K and the gas gets converted to a gas of hydrogen atoms. The final pressure would be (considering all gases of be ideal)