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2 years ago

How do you calculate the mass of an element in a compound using percent composition?

Chemistry

1 answer:

Dmitry_Shevchenko [17]2 years ago

7 0

Answer:

Find the molar mass of all the elements in the compound in grams per mole.

Find the molecular mass of the entire compound.

Divide the component's molar mass by the entire molecular mass.

You will now have a number between 0 and 1. Multiply it by 100% to get percent composition.

Explanation:

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2 years ago

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If you combine 27.1 g of a solute that has a molar mass of 27.1 g/mol with 100.0 g of a solvent, what is the molality of the res

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Answer: The molality of the solution is 0.1 m.

Explanation:

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Putting values in above equation, we get:

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3 years ago

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Determine the change in volume that takes place when a 2.00 L sample of N2 gas is heated from 250 C to 500 C.

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Answer:

V₂ = 2.96 L

Explanation:

Given data:

Initial volume = 2.00 L

Initial temperature = 250°C

Final volume = ?

Final temperature = 500°C

Solution:

First of all we will convert the temperature into kelvin.

250+273 = 523 k

500+273= 773 k

According to Charles's law,

V∝ T

V = KT

V₁/T₁ = V₂/T₂

V₂ = T₂V₁/T₁

V₂ = 2 L × 773 K / 523 k

V₂ = 1546 L.K / 523 k

V₂ = 2.96 L

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3 years ago