Answer:
The reaction type is Synthesis
a because the spoon is a solid and the hot chocolate is a liquid.So that means that spoon moves slower than a liquid.
Answer is: the oxidation number of oxygen must decrease.
Oxidizing agent is element (substance) that gain electrons in chemical reaction.
For example, balanced chemical reaction: C + O₂ → CO₂.
Oxygen change oxidation number from 0 to oxidation number -2 (reduction) and carbon change from 0 to +4 (oxidation)
Mass number = number of protons + number of neutrons
mass number= 8 + 7= 15 ---> the answer is B.
It's a FUSION reaction because Iron and Oxygen react together to make Iron Oxide (rust) and it's EXOTHERMIC because the reaction forms heat (stated above), which means it's releasing energy.
