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larisa86 [58]
3 years ago
8

2 human activities that contribute to runoff into water systems

Chemistry
1 answer:
Elodia [21]3 years ago
6 0
Urinating respiration crying flooding
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<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

 </span>5.31×10^21 platinum atoms ( 1 mol / 6.022 x 10^23 atoms ) ( 78 grams / 1 mol ) = 0.6878 grams platinum
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