Answer:
The first one
Explanation:
Out of those I'd say the first ones the most right, chemical bonds have to be broken to start a chemical reaction which is exothermic and does release energy.
So yea the top one I reckon.
Answer:
Molecular Mass:
1. 40g per mole
2. 19g per mole
3. 64g per mole
4. 32 g per mole
5. 17g per mole
6. 59.5g per mole
7.58.5 g per mole
8.220g per mole
9. 78g per mole
10. 200g per mole
Explanation:
Molecular Mass = Number of atom x atomic mass of an element
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A molecule of ammonia clearly contains 1 nitrogen (N) atom and 3 of the hydrogen (H) atoms combined by sharing of the valence electrons of the atoms. Ammonia is a colorless gas and is usually characterized by its pungent odor.
Carbon tetra chloride = CCl4
calcium bromide = CaBr2