C. single replacement. A single replacement is represented by this formula : AB + C = AC + B
<span>An exothermic reaction is one in which there is the production of heat whereas an endothermic reaction is one in which heat is absorbed. For the choices above, the answer would be letter B. Ice melting in water and an ice pack turning cold absorbs heat which is why it is an endothermic reaction. Exploding fireworks and gasoline burning gives off heat which is why it is an exothermic reaction.</span>
Answer: C
Explanation: I got it right.
Answer:
1 and the element is hydrogen (there is an exception for the octet rule for the element hydrogen) hope this helps
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