8th Science 8.5DE

Front

What is the total number of atoms in a molecule of glucose (C6H12O6)?

Back

6

Front

How many atoms of oxygen are present in a molecule of glucose (C6H12O6)?

Back

6

Front

What evidence indicates a chemical reaction when vinegar and baking soda are combined?

Back

Bubbles form, indicating a gas is released.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the chemical formula for sodium sulfate?

Back

Na2SO4

Front

What are the components of a chemical formula?

Back

Elements and their respective quantities in a compound.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.