3 years ago

What is another name for the heat involved in a reaction?

Chemistry

1 answer:

wlad13 [49]3 years ago

4 0

There is your answer

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What liquid is the most vicious ?

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Viscosity is basically how thick a liquid is so pancake syrup would be the answer

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3 years ago

What coefficient should be placed before 02?<br> 2S+ __02 → 2S03

Trava [24]

Explanation:

$\tt{2S+6O_2\implies{2SO_3} }$

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3 years ago

Vitamin D has a percent composition of 42.98% C, and 57.02% H. Its molecular

Alex73 [517]

Answer:

Dont use alot of points

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people scam like me and ay the wrong answer and get the points :|

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3 years ago

1. A sample of polystyrene is found to have a number-average molar mass of 89,440 g mol−1 . Neglecting contributions from end gr

Snowcat [4.5K]

Answer:

The weight-average molar mass of polystyrene is 134,160 g/mol.

Explanation:

Molar mass of the monomer styrene , $C_8H_8$ , M=104 g/mol

Given , number average molar mass of the polymer , M'= 89,440 g/mol

Degree of polymerization = n

$n=\frac{M'}{M}=\frac{89,440 g/mol}{104 g/mol}=860$

The weight-average molar mass = $M_{avg}=?$

Molar mass dispersity is ratio of weight-average molar mass to the number average molar mass of the polymer.

$\text{Molar mass dispersity}=\frac{M_{avg}}{M'}$

$1.5=\frac{M_{avg}}{89,440 g/mol}$

$M_{avg}=89,440 g/mol\times 1.5 = 134,160 g/mol$

The weight-average molar mass of polystyrene is 134,160 g/mol.

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3 years ago

Humans have developed ways to increase the carrying capacity of their environment. True or false

gladu [14]

Answer:

false.nowadays humans are destroying forest,extracted more minerals,making pollution. in my view.

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