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svet-max [94.6K]
4 years ago
13

Calculate the molecular weights for nh3 and sf6

Chemistry
2 answers:
avanturin [10]4 years ago
7 0
<span>no.of moles of SF6 = 0.35/molar mass of SF6 = 0.35/146.06 = 2.396 X 10^-3  </span>

<span>so you need 2.396 X 10^-3 moles of NH3 molecules </span>

<span>molar mass of NH3 = 17.031 g/mole </span>

<span>that means 1 mole of NH3 = 17.031 g </span>

<span>so 2.396 X 10^-3 moles of NH3 = 17.031 X 2.396 X 10^-3 = 0.041 g</span>
jeyben [28]4 years ago
5 0

Answer:

a) NH_{3} = 17 g/mol

b) SF_{6} = 146 g/mol

Explanation:

The molecular weight of a compound is equal to the sum of the atomic weights of the constituent elements.

a) NH_{3}

Atomic weight of N = 14 g/mol

Atomic weight of H = 1 g/mol

Molecular weight = 14\ g/mol + 3(1\ g/mol) = 14 + 3 = 17\ g/mol

b) SF_{6}

Atomic weight of S = 32 g/mol

Atomic weight of F = 19 g/mol

Molecular weight = 32\ g/mol + 6(19\ g/mol) = 32 + 114 = 146\ g/mol

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