Balancing and Counting Atoms

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

Number of C's in 2Na₂CO₃

• 1
• 2
• 3
• 5

Tags

NGSS.MS-PS1-1

How many Elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

Tags

NGSS.MS-PS1-1

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

Tags

NGSS.MS-PS1-1

How many Chlorine are in MgCl₂?

• 2
• 1
• 3

Tags

NGSS.MS-PS1-1

How many atoms of Hydrogen are in this compound

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many atoms of Oxygen are in this compound?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many TOTAL atoms are in this compound?
H₂C₃O₄N₅

• 5
• 14
• 15
• 19

Tags

NGSS.MS-PS1-1

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5