At higher temperatures, molecules have more energy
It is not, because the mass is being conserved and not changed.
A
M (O) = M x n
M (O) = 16g/mol
n (O) = 3 x n (NaHCO3)
n (NaHCO3) = m/M
m (NaHCO3) = 0.72g
M (NaHCO3) = 23 + 1 + 14 + 16 x 3 = 86g/mol
n (NaHCO3) = 0.72/86 = 0.008372mol
n (O) = 3 x 0.008372 = 0.02512
m (O) = 16 x 0.02512 = 0.402g
Answer:
1. 0.00040 calories
2. 8.57 calories
3. 0.196 calories
4. 68 calories
5. 243 calories
6. 83680 joules
7. 1,054,368 joules
8. 2.45 calories
9. 556 (it says calories to calories so it wouldn't change)
10. 28367.52 joules
11. 59.6 calories
12. 449.6 joules
13. 0.00234 calories
14. 23292.328 joules
15. 22877693.6 joules
Hope this helps!
Explanation: