Potassium superoxide, KO2, reacts with carbon dioxide to form potassium carbonate and oxygen: 4KO2 +2CO2 ---> 2K2CO3 + 3CO2

This reaction makes potassium superoxide useful in a self-contained breathing apparatus. How much O2 could be produced from 2.59 g of KO2 and 4.56 g of CO2?

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mixture , because iron gets attracted to magnet .

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hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.