0973 03 Stoichiometry CORE

0973 03 Stoichiometry CORE

Assessment

Flashcard

Chemistry

10th Grade

Practice Problem

Easy

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10 questions

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1.

FLASHCARD QUESTION

Front

How does the mass of the products of a chemical reaction compare to the mass of the reactants?

Back

The mass of the products of a chemical reaction is equal to the mass of the reactants

2.

FLASHCARD QUESTION

Front

How can the mass of a reactant in a chemical reaction be calculated when the masses of the other substances in the reaction are known?

Back

Subtract the sum of the known masses of any other reactants from the sum of the known masses of the products

3.

FLASHCARD QUESTION

Front

What is the mass of one mole of any substance equal to?

Back

The substance’s relative formula mass (Mr), or relative atomic mass (Ar), in grams

4.

FLASHCARD QUESTION

Front

What do the numbers in front of substances in equations mean in terms of moles?

Back

How many moles of the substance are involved in the reaction

5.

FLASHCARD QUESTION

Front

Define molecular formula

Back

The actual numbers of elements (atoms) that are in a compound

6.

FLASHCARD QUESTION

Front

Define relative atomic mass

Back

The average mass of naturally occurring atoms of an element compared to 1/12th of the mass of an atom of carbon-12.

7.

FLASHCARD QUESTION

Front

Define relative molecular mass

Back

The sum of the relative atomic masses (Ar) of the atoms shown in the formula of a compound

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