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2 years ago

How many repeat units are required to make a nylon polymer with a formula weight of 15,000 amu?

Chemistry

1 answer:

Y_Kistochka [10]2 years ago

5 0

This problem is giving information about a nylon polymer whose molar mass is 15,000 amu (atomic mass units).

The first subject of matter here, is to recall the monomeric molecular formula of nylon which is C₁₂H₂₂N₂O₂, and the definition of monomer (basic molecule able to react and form a polymer) and polymer (assembling of monomers).

Next, we calculate the molar mass of the monomer of nylon:

$12*12.01+22*1.01+2*14.01+2*16.00=226.31amu$

Finally, the number of units is calculated by dividing the molar mass of the polymer and the monomers:

$n=\frac{15000}{226.31} =66.2$

Which is about 66 monomers.

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$\huge\boxed{\sf 36\ H\ atoms}$

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In 1 mole of Glucose, there are 12 hydrogen atoms.

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$\rule[225]{225}{2}$

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How molecules of N2 gas can be present in a 2.5 L flask at 50°C and 650 mmHg?

ratelena [41]

Answer:

0.482 ×10²³ molecules

Explanation:

Given data:

Volume of gas = 2.5 L

Temperature of gas = 50°C (50+273 = 323 k)

Pressure of gas = 650 mmHg (650/760 =0.86 atm)

Molecules of N₂= ?

Solution:

PV= nRT

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one mole = 6.022 ×10²³ molecules

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