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U6 Day 3 - Empirical and Molecular Formulas

U6 Day 3 - Empirical and Molecular Formulas

Assessment

Flashcard

Chemistry

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 empirical formula?

Back

The empirical formula is the formula that shows the simplest whole-number ratio of elements in a compound.

2.

FLASHCARD QUESTION

Front

What is the molecular formula?

Back

The molecular formula shows the actual number and kinds of atoms present in one molecule of a compound.

3.

FLASHCARD QUESTION

Front

How do you determine the empirical formula from percent composition?

Back

Convert the percent composition to grams, then to moles, and find the simplest whole-number ratio.

4.

FLASHCARD QUESTION

Front

What is the relationship between empirical and molecular formulas?

Back

The molecular formula is a multiple of the empirical formula.

5.

FLASHCARD QUESTION

Front

What is the empirical formula for a compound with 72.2% magnesium and 27.8% nitrogen?

Back

Mg3N2

6.

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

7.

FLASHCARD QUESTION

Front

If a compound has an empirical formula of K2SO4 and a molecular mass of 696g, what is its molecular formula?

Back

K8S4O16

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