Which of the following contains maximum number of molecules
`4gm` of hydrogen
`22.4l trs` of oxygen at S.T.P
Carbon dioxide obtained by heating `1` mole of calcium carbonate
`4gm` of helium

The maximum number of reducing hydrogens are contained in which of the following molecule/s ?

A balanced equation for combustion of methane is given below: CH_(4(g)) + 2O_(2(g)) to CO_(2(g)) + 2H_2O_(g) Which of the following statements is not correct on the basis of the above chemical equation? (A) one mole of CH4 reacts with 2 moles of oxygen to give one mole of CO2 (B) one molecule of CH4 reacts with 2 molecules of oxygen to give one molecule of CO2 and 2 molecules of water (C) 22.4L methane reacts with 44.8L of oxygen to give 44.8L of CO2 and 22.4L of water (D) 16g of methane reacts with 64g of O2 to give 44g of CO2 and 36g of water

Which of the following weighs most (a) 2 gram-atom of oxygen (b) 25 g of Fe (c) 4 xx 10^(23) atoms of carbon (d) 22.4 litres of CO_(2)

Calculate the weight of carbon which is burnt with excess of oxygen to form 22.4 L of CO2 at NTP

What is the molecular mass of substance, each molecule of which contains 4 atoms of carbon and 10 atoms of hydrogen?

4.4 gm of CO_(2) and 2.24 "litre" of H_(2) at STP are mixed in a container. The total number of molecules present in the container will be:

A sample of ammonium phosphate, (NH_4)_3PO_4, contains 6 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is :

A sample of ammonium phosphate, (NH_4)_3PO_4 contains 18 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is

Consider a sample containing (NH_4)_2Cr_2O_7 Number of gm molecules of (NH_4)_2Cr_2O_7 present in the sample if mass of hydrogen obtained from the sample is 2g

1 gm of a mixture of calcium carbonate and magnesium carbonate gave on ignition 240 mL of carbon dioxide at S.T.P. What is the percentage composition of the mixture ?