Chemical Formula and Gram-Mole Review

Chemical Formula and Gram-Mole Review

Assessment

Flashcard

Chemistry

10th - 11th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a chemical formula?

Back

A chemical formula is a symbolic representation of the composition of a chemical compound, indicating the types and numbers of atoms present.

2.

FLASHCARD QUESTION

Front

What does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element in one molecule of the compound.

3.

FLASHCARD QUESTION

Front

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

4.

FLASHCARD QUESTION

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the chemical formula, multiplied by their respective subscripts.

5.

FLASHCARD QUESTION

Front

What is the chemical formula for potassium sulfide?

Back

The chemical formula for potassium sulfide is K2S.

6.

FLASHCARD QUESTION

Front

What does the formula Mg(NO3)2 represent in terms of its components?

Back

The formula Mg(NO3)2 represents 1 magnesium (Mg), 2 nitrogen (N), and 6 oxygen (O) atoms.

7.

FLASHCARD QUESTION

Front

How many moles are in 27.8 grams of CaCl2?

Back

To find the number of moles, divide the mass (27.8 g) by the molar mass of CaCl2 (110.98 g/mol), which equals approximately 0.25 moles.

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