Consider the reaction between hydrogen and oxygen gases to form water. Which of the following is/are not conserved in the reaction?
2H2(g) + O2(g) → 2H2O(l)
Atoms
Mass
Both moles of molecules and moles of atoms
Moles of molecules
Moles of molecules are not conserved in the reaction.
What is the mass of:
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules?
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. How many moles of Oxygen gas escape in the time required for half a mole of the hydrogen to escape?