Intro to Balancing Equations

Intro to Balancing Equations

Assessment

Flashcard

Chemistry

10th Grade

Hard

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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 to indicate how many molecules or atoms of that substance are involved in the reaction.

2.

FLASHCARD QUESTION

Front

How do you determine the number of atoms of an element in a chemical equation?

Back

Count the coefficients and subscripts in the chemical formula. For example, in 4Al + 3O2 --> 2Al2O3, there are 4 aluminum atoms on the left side.

3.

FLASHCARD QUESTION

Front

What are the products in a chemical equation?

Back

The products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

4.

FLASHCARD QUESTION

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change, found on the left side of the equation.

5.

FLASHCARD QUESTION

Front

How many total atoms are in H2SO4?

Back

There are 7 total atoms in H2SO4: 2 hydrogen, 1 sulfur, and 4 oxygen.

6.

FLASHCARD QUESTION

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

7.

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.

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