(i) Calculate the mass of 2.5 mole of oxygen atom. (ii) Calculate the number of molecules in 11g of CO_2 . (iii) Calculate the number of moles in 81g of aluminium.

(i) What is the mass of 1 mole of nitrogen atom? (ii) How many moles of SO_(2) have same mass as 3 moles of oxygen? (iii) How many molecules are present in 1 ml of water?

Which contains the greatest number of mole of oxygen atoms?

Which contains the greatest number of moles of oxygen atoms i) 1 mol of ethanol ii) 1 mol of formic acid iii) 1 mol of H_(2)O

Which contains the greatest number of moles of oxygen atoms (i) 1 mol of ehtanol (ii) 1 mol of formic acid (iii) 1 mol of h2o

Which contains the greatest number of moles of oxygen atoms? (i) 1 mol of ethanol (ii) 1 mol of formic acid (iii) 1 mol of H_(2)O

Calculate the mass of 0.5 mole of iron.