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2 years ago

Please i need your help asap!

Chemistry

1 answer:

denis23 [38]2 years ago

6 0

Answer:

Density is mass over volume.

Explanation:

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The word elliptical refers to what type of shape?

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The word elliptical refers to an Oval.

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A chemical equation does not give information about what

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A chemical equation does not give information about the following:

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3 years ago

How do elements differ going from left to right across a period on the periodic table?

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2 years ago

Which element in the third period would you expect to have the larger atomic radius, sodium (Na) or Sulfur

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3 years ago

A sample of natural rubber (200.0 g) is vulcanized, with the complete consumption of 4.8 g of sulfur. Natural rubber is a polyme

nasty-shy [4]

Answer: 1.3% many crosslinks as isoprene units,

Explanation:

Given:

mass pf natural rubber= 200.0g

mass of sulphur = 4.8g

molar mass of sulphur =32g/mol

molar mass of isoprene = C5H8=( 12x5) +(1x8)= 68g/mol

Solution: we first find no of moles present in each using

no of moles = $\frac{mass}{molarmass}$

Isoprene: 200.0g x [1mole / 68g] = 2.94moles.

Sulfur: 4.8g x [1mole / 32g] x [1 mole crosslinks / 4 moles S] = 0.0375 moles crosslinks.

to find % crosslinked units, we have

0.0375 / 2.94 = 1.3% as many crosslinks as isoprene units,

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3 years ago