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Zielflug [23.3K]
3 years ago
10

Determine the percentage composition (by mass) of oxygen in NH4NO3.

Chemistry
1 answer:
Brrunno [24]3 years ago
6 0

Answer:

60%

Explanation:

M(NH4NO3) = 2*14 +4*1 +3*16 = 80 g/mol

M(3O) = 3*16 = 48 g/mol

(48/80) *100 % =60% oxygen by mass.

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A material has an ASTM grain size number of 7. Determine the magnification, if the number of grains per square inch observed is:
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B)  total grain per inch^2 = 500 grain/inch^2

we know that number of grain per square inch is given as

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where M is magnification, n is grain size

therefore we have500 = 2^{7-1}(\frac{100}{M})^2

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Nm = 2^{n-1} (\frac{100}{M})^2

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solving for M we get

M = 178.88 X

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