First, find the number of moles of UF6
Avagadro's number = 6.023 x 10^23
Number of moles = 8.0 x 10^26 / Avagadro's number = 8.0 x 10^26 / 6.023 x 10^23 = 1.328 x 10³ moles
Molecular weight of UF6 = Molecular weight of U (238.02891) + Molecular weight of F6 (6 x 18.9984032) = 238.02891 + 113.9904192 = 352.0193292 g/mol
Therefore mass of 8.0 x 10^26 UF6 molecules = 352.0193292 g/mol x 1.328 x 10³ moles = 467.481669 x 10³ grams
(N2) = to 65.3 is the right answer plus 21 = 63
Answer:
0.726 mol·L⁻¹
Step-by-step explanation:
c = moles/litres
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Moles = 29.8 × 1/342.30
Moles = 0.087 06 mol
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Litres = 120 × 1/1000
Litres = 0.120 L
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c = 0.087 06/0.120
c = 0.725 mol·L⁻¹
Mg is magnesium. NO3 is nitrate. This gives you magnesium nitrate as an answer.
