PS Balancing Equations

PS Balancing Equations

Assessment

Flashcard

Chemistry

7th - 10th 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 a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or atoms of that substance are involved in the reaction.

2.

FLASHCARD QUESTION

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means making sure that the number of atoms of each element is the same on both sides of the equation, following the law of conservation of mass.

3.

FLASHCARD QUESTION

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

4.

FLASHCARD QUESTION

Front

How do you balance the equation: N2 + H2 → NH3?

Back

The balanced equation is: 1 N2 + 3 H2 → 2 NH3.

5.

FLASHCARD QUESTION

Front

What are the coefficients for the equation: Ag2O → Ag + O2?

Back

The coefficients are 2, 4, 1.

6.

FLASHCARD QUESTION

Front

What is the total mass of reactants compared to products in a balanced equation?

Back

The total mass of the reactants is the same as the total mass of the products.

7.

FLASHCARD QUESTION

Front

How do you balance the equation: Al + HCl → H2 + AlCl3?

Back

The balanced equation is: 2 Al + 6 HCl → 3 H2 + 2 AlCl3.

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