Counting Atoms Subscripts and Coefficients

How many atoms of oxygen are in the 3O₂?

• 3

• 2

• 6

• 5

How many atoms of oxygen are in this compound: 2AlCO₃?

• 3

• 2

• 6

• 5

Tags

NGSS.MS-PS1-1

How many elements are here?

• 2

• 3

• 6

• 12

Tags

NGSS.MS-PS1-1

What is the arrow pointing to?

• coefficient
• subscript
• banana
• a number

What are the arrows pointing to?

• coefficient
• subscript
• pineapple
• a number

How many total hydrogen are in 2NaOH?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which of the following properly shows a situation where there are eight oxygen atoms?  Assume you start with H₂SO₄

• 2H₂SO₄
• H₂S2O₄
• H₂(SO₄)₂
• H₂SO₈

Tags

NGSS.MS-PS1-1

In a chemical equation, you can never change the ____.

• Coefficient

• Subscript

In a chemical equation, if it is not "balanced" (aka not demonstrating the law of conservation of matter), than the only thing that can be changed is the _______.

• coefficient

• subscript

Tags

NGSS.MS-PS1-5

The substances found left of the arrow (HNO3 and Ca(OH)2) are known as the __________.

• catalyst

• yield

• product

• reactant

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5