Answer:
There are 14 cm in 0.14 m
The opportunity costs of working part-time while attending high school could be studying time, grades, and your own free time. It depends on the person, how they do in school, but if it were for me, I would say the benefits outweigh the costs. I have enough time to study and still get good grades in school.
Answer: 15.62 moles of 
are needed to produce 250.0 g of 
Explanation:
To calculate the moles :
According to stoichiometry :
1 mole of is produced from decomposition of = 2 moles of
Thus 7.812 moles of will be produced from decomposition of =
of
Thus 15.62 moles of are needed to produce 250.0 g of
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It's an atom with the same number of protons but a different number of neutrons and thus, a different mass number.
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