Counting Atoms

How many hydrogen atoms are in the formula HBr?

• 1 H

• 1 Br

• 2 atoms

Tags

NGSS.MS-PS1-1

• 1 K

• 2 K

• 1 O

Tags

NGSS.MS-PS1-1

What does a chemical formula represent?

• The number of atoms of each element

• The molecular structure

• The chemical reaction

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NGSS.MS-PS1-1

What does the subscript in a chemical formula indicate?

• The number of atoms of a particular element

• The charge of the element

• The state of matter

What should be multiplied by the subscript to find the number of atoms of each element?

• The coefficient

• The chemical symbol

• The parenthesis

Tags

NGSS.MS-PS1-1

How many elements are in the compound C₂H₈O ?

• 2
• 1
• 3

Tags

NGSS.MS-PS1-1

How many total atoms are in the compound C₂H₈O ?

• 11
• 2
• 8

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7

Tags

NGSS.MS-PS1-1

How many atoms of Oxygen are in Fe(NO₃)₃ ?

• 6
• 3
• 9

Tags

NGSS.MS-PS1-1

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

Tags

NGSS.MS-PS1-1