Answer: 121.95587 g/mol
Explanation:
- The atomic mass of aluminum is 26.98154 g/mol.
- The atomic mass of phosphorous is 30.97673 g/mol.
- The atomic mass of oxygen is 15.9994 g/mol.
Therefore, the molecular mass is:
Prokaryotes are organisms whose cells lack a nucleus and other organelles
Answer:
ΔH of CH4(g)+2O2(g)→CO2(g)+2H2O(l) is -899 KJ
Explanation:
step 1: write down thye reaction and rearrange them in a way that similar contents cancel out to produce the required reaction and add the enthalpy change of each.
CH4(g)+O2(g)→CH2O(g)+H2O(g) ΔH = -284 KJ
CH2O(g)+O2(g)→CO2(g)+H2O(g) ΔH = -527 KJ
2H2O(g)→2H2O(l) ΔH = 44 KJ x -2
the minus is because the last reaction has been reversed and multiplied by 2 so that the gaseous state H2O cancels with the others to leave liquid H2O in the required final reaction.
ΔHrxn = (-284)+(-527)+[44 x (-2)] = -899 KJ