A nickel coin is a mixture of metals called an alloy. It is 75% copper and 25% nickel. Design and conduct an experiment to find out how many nickel and copper atoms there are in one 5 cent coin.

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answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.