Answer:
1) B. The change in energy in a system during an exothermir reaction
2) B. In the air, only the oxygen is part of the system
3) B. The energy found in the reactants....
4) D. This is an endothermic reaction because the system took energy from the surroundings.
5) B. Energy is released by the formation of chemical bonds
Explanation:
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I believe it is 700N Right
Answer:
is this the one u were asking about in the comment but ill just answer this anyway-
Explanation:
a).3
b).85/85%/ 17/20 - idk what form its asking for but this the general idea
c) about a 285 hour battery life