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

Pragya tested the solubility of three different substances at different temperatures - and collected the data as given below (results are given in thefollowing table, as grams of substance dissolved in 100 grams of water to form a saturated solution). What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate to 50 grams of water at 313K?

Write the names of isotopes of hydrogen. What is the mass ratio of these isotopes?

How many mL of 0.1 M HCl are required to react completely with 1g mixture of Na_2CO_3 and NaHCO_3 containing equimolar amounts of both?

Sodium form a crystalline ionic solid with dihydrogen. The solid is non-volatile and non-conducting in nature. It reacts violectly with water to produce dihydrogen gas. Write the formula of this compound and its reaction with water. What will happen on electroysis of the melt of this solid?

An organic compound contains 69.77% carbon, 11.63% hydrogen and the rest is oxygen. The molecular mass of the compound is 86u. The compound does not reduce Tollens reagent but reacts with Brady's reagent to give yellow precipitate. On vigorous oxidation the molecule produces ethanoic acid and propanoic acid. The compound also shows iodoform test. Identify and name the compound and write the reactions.

The mass of 16.4 dm^3 of a gas at STP is 22g. What is the molar mass of the gas?

One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What 'is the ratio of molar volume to the atomic volume of a mole of hydrogen?

A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume?