What is the mass of 1 mol of oxygen?

What is the mass of 1 gm atom of oxygen?

1L of air contains 21% of oxygen by volume at STP. What is the number of moles of oxygen in 1L of air?

What is the mass of 1L of hydrogen gas at STP?

What is the volume of 1 mol of any gas at STP?

What is the chemical symbol of oxygen?

Density of oxygen at STP is 1.429 g.L^-1 What will be the mass of 2.5 L of oxygen gas at 27^@C and at 780 mmHg pressure?

Calculate the mass of 1 mol of electrons if the mass of one electron be 9.11xx10^(-31)kg .

What will be the volume of one mole of oxygen at 27^@C and at a pressure twice the standard atmosphere R=8.31 times 10^7 erg.mol^-1K^-1 .

If Avogadro number N_A is changed from 6.022 xx 10^23 mol^(-1) to 6.022 xx 10^20 mol^(-1) this would change the mass of one mole of carbon

Write down the thermochemical equations for the following reactions: (i) A 1 mol sample of methane gas reacts with 2 mol of oxygen gas to form 1 mol of carbon dioxide and 2 mol of water. In this reaction, 890.5 kJ of heat is produced. (ii) A 1 mol sample of carbon (graphite) reacts with 1 mol of oxygen tof orm 1 mol fo carbon dioxide gas. the heat evolved in this reaction is 393.5 kJ. (iii) 6 mol of carbon dioxide gas reacts with 6 mol of water to form 6 mol of oxygen gas and 1 mol of glucose. the heat absorbed in this reaction is 2200 kJ.