I believe a good hypothesis must be testable, as suggesting an idea must be accompanied by scientific procedures and ways to figure out if the hypothesis holds true or not.
Explanation:
Start with a balanced equation.
2H2 + O2 → 2H2O
Assuming that H2 is in excess, multiply the given moles H2O by the mole ratio between O2 and H2O in the balanced equation so that moles H2O cancel.
5 mol H2O × (1 mol O2/2 mol H2O) = 2.5 mol O2
Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.
The temp. increase was 8.50 degrees <span>C. (my b)
It requires 4.184J to increase the temp. of a 1g solution by 1 degrees </span><span>C.
Total heat required is 16,143J.
Molar Mass NaOH is 40g/mol
Evolved heat/mol NaOH = 51,045J.</span>
Answer:
C
In an exothermic reeaction, the energy of products is less than the energy of reactants.
Explanation: