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Harlamova29_29 [7]
2 years ago
13

If 1 mol of XO₂ contains the same number of atoms as 60 g of XOs, what is the molar mass of XO₂?

Chemistry
1 answer:
Lena [83]2 years ago
5 0

Answer:

44 grams/mole

Explanation:

<u>If 1 mol of XO₂ contains the same number of atoms as 60 g of XO3, what is the molar mass of XO₂?</u>

<u></u>

60 grams of XO3 is one mole XO3, since it has the same number of atoms as 1 mole of XO2.

Let c be the molar mass of X.  The molar mass of XO3 is comprised of:

X:  c

3O:  3 x 16 = 48

Total molar mass of XO3 is = <u>48 + c</u>

We know that the molar mass of XO3 = 60 g/mole, so:

48 + c  = 60 g/mole

c = 12 g/mole

The molar mass of XO2 would be:

1 X = 12

2 O = 32

Molar mass = 44 grams/mole, same as carbon dioxide.  Carbon's molar mass is 12 grams.

<u></u>

<u></u>

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Given the data in the question;

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48,000-56,000         52,000       0.07           0.12          3640              6240

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a)  the number-average molecular weight

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Mn = ∑Mixi = 32,400

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b) the weight-average molecular weight

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so from the table above; summation of Row Miwi

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now, for polypropylene { CH₂ = CH - CH₃ }

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now we find the repeat unit molecular weight of polypropylene

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so we substitute

DP = 32,400 / 42.078

DP = 769.9985 ≈ 770

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