Answer:
Is this the full question
Explanation:
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Water, H2O, HOH these are all the same compound just worded differently
Answer:
Organisms compete for the resources they need to which are survive- air, water, food, and space.
Reaction:

Magnesium is a stronger reducing agent than copper and is thus able to reduce copper(II) oxide.
Products of the reaction: Magnesium oxide and metallic copper.
With computer you have a wire you connect the nuclear and the computer together that is how it works in the in the computer there is a stopwatch of 30 minutes