4. Calculate the mass of each element:
a) 3.25 mol of He
b) 0.0455 mol of Ni
c) 1.33 mo...
Chemistry, 07.03.2021 16:50 yuhhhhh2801
4. Calculate the mass of each element:
a) 3.25 mol of He
b) 0.0455 mol of Ni
c) 1.33 mol of K
Answers: 2
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Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.
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11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
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An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?
Answers: 1
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