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3 years ago

What is the solution to the proportion 3/m = 12/15

Chemistry

2 answers:

Naddik [55]3 years ago

6 0

Answer:The correct answer is option B.

Explanation:

Proportion the given solution:

$\frac{3}{m}=\frac{12}{15}$

$\frac{3}{12}=\frac{m}{15}$

$m=\frac{3\times 15}{12}=3.75$

The value of the 'm' is 3.75.

The correct answer is option B.

slega [8]3 years ago

5 0

The answer is
B.
m=3.75

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3 years ago

Read 2 more answers

2. Calculate the number-average molecular weight of a random poly (isobutylene-isoprene) copolymer in which the fraction of isob

Phoenix [80]

Answer : The number-average molecular weight is, 97500 g/mol

Explanation :

First we have to calculate the molecular weight of isobutylene and isoprene.

The molecular formula of isobutylene and isoprene is, $C_4H_8$ and $C_5H_8$

Molecular weight of $C_4H_8$ = 4(12 g//mol) + 8(1 g/mol) = 56 g/mol

Molecular weight of $C_5H_8$ = 5(12 g//mol) + 8(1 g/mol) = 68 g/mol

Now we have to calculate the average repeat molecular weight.

Average repeat molecular weight = $0.25\times (56g/mol)+(1-0.25)\times (68g/mol)$

Average repeat molecular weight = 65 g/mol

Now we have to calculate the number-average molecular weight.

Number-average molecular weight = Average repeat molecular weight × Degree of polymerization

Number-average molecular weight = (65 g/mol) × (1500)

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Thus, the number-average molecular weight is, 97500 g/mol

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3 years ago