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On Level  % Composition and Empirical/Molecular Formulas

On Level % Composition and Empirical/Molecular Formulas

Assessment

Flashcard

Science, Chemistry

10th - 11th 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 the chemical formula for magnesium bromide?

Back

MgBr₂

2.

FLASHCARD QUESTION

Front

Which element has a greater atomic mass in carbon monoxide (CO)?

Back

Oxygen

3.

FLASHCARD QUESTION

Front

What is the empirical formula of a compound containing 0.473 g of nitrogen, 33.8% carbon, and 1.41% hydrogen by mass?

Back

C₂HNO₂

4.

FLASHCARD QUESTION

Front

What is the molecular formula for glycerol with a molar mass of 92.09 g/mol and percent composition of 39.12% C, 8.75% H, and 51.12% O?

Back

C₃H₈O₃

5.

FLASHCARD QUESTION

Front

What percentage of the total atomic mass of carbon monoxide (CO) is composed of carbon?

Back

43%

6.

FLASHCARD QUESTION

Front

Define percent composition in chemistry.

Back

Percent composition is the percentage by mass of each element in a compound.

7.

FLASHCARD QUESTION

Front

What is the difference between empirical and molecular formulas?

Back

Empirical formula shows the simplest whole-number ratio of elements, while molecular formula shows the actual number of atoms of each element in a molecule.

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