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Molar Mass and Percent Composition

Molar Mass and Percent Composition

Assessment

Flashcard

Chemistry, Science

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a chemical formula.

2.

FLASHCARD QUESTION

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.

3.

FLASHCARD QUESTION

Front

What is percent composition?

Back

Percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of the element by the total molar mass of the compound and multiplying by 100.

4.

FLASHCARD QUESTION

Front

How do you find the percent composition of an element in a compound?

Back

To find the percent composition, use the formula: (mass of element in 1 mole of compound / molar mass of compound) x 100.

5.

FLASHCARD QUESTION

Front

Calculate the molar mass of Ba(C2H3O2)2.

Back

The molar mass is 255.3 g/mol.

6.

FLASHCARD QUESTION

Front

Find the percentage composition of Mg in Mg3(PO4)2.

Back

The percentage composition of Mg is 27.48%.

7.

FLASHCARD QUESTION

Front

What is the percent composition by mass of sulfur in MgSO4?

Back

The percent composition by mass of sulfur in MgSO4 is 27%.

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