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Debora [2.8K]
2 years ago
14

6. Three ice cubes are placed inside a glass of hot chocolate. Which of the following best

Chemistry
1 answer:
ycow [4]2 years ago
4 0
It’s the first 1 M yea it’s the first one
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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
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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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Which combination of factors is most suitable for increasing the electrical conductivity of metals
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More valence electrons and larger atomic radius are facts most suitable for increasing the electrical conductivity of metals.
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Are ions of alkali metals larger or smaller than ions of alkaline earth metals from the same period
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How many atoms are in 2.85x10^3 g of gallium
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2850 grams I hope this help

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