Counting Atoms

Counting Atoms

Assessment

Flashcard

Science

8th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

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.

2.

FLASHCARD QUESTION

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

3.

FLASHCARD QUESTION

Front

How do you determine the number of atoms in a molecule?

Back

To determine the number of atoms in a molecule, add the subscripts of each element in the chemical formula. For example, in C6H12O6, there are 6 carbon, 12 hydrogen, and 6 oxygen atoms.

4.

FLASHCARD QUESTION

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction, appearing on the left side of a chemical equation.

5.

FLASHCARD QUESTION

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction, appearing on the right side of a chemical equation.

6.

FLASHCARD QUESTION

Front

How many different elements are in the compound H2SO4?

Back

There are 3 different elements in H2SO4: Hydrogen (H), Sulfur (S), and Oxygen (O).

7.

FLASHCARD QUESTION

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts in a chemical formula indicate the number of atoms of each element present in a molecule. For example, in H2O, the subscript '2' indicates there are 2 hydrogen atoms.

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