LOCOM Counting Atoms

How many Hydrogen are in 4 H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

How many Magnesium are in 10 MgCl₂?

• 10
• 5
• 20

Tags

NGSS.MS-PS1-1

What is the product?

2 H₂ + O₂ → 2 H₂O

• ------>
• 2H₂O
• 2H₂+ O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many atoms of Carbon are in the compound C₂H₈O ?

• 8
• 2
• 1
• 11

Tags

NGSS.MS-PS1-1

Why is the following chemical equation not balanced?
H_{2 +} O₂ →  H₂O

• each side of the equation has a different number of oxygen atoms
• each side of the equation has a different number of hydrogen atoms
• each side has the same mass

Tags

NGSS.MS-PS1-5

Is the following equation balanced or unbalanced?
Fe + S → FeS

• balanced
• unbalanced

Tags

NGSS.MS-PS1-5

What is the part of the chemical equation in green (left side) called? 
Fe + S → FeS

• products
• reactants
• yield
• chemical formula

How many Sodium atoms are in 6 NaCl?

• 1

• 12

• 6

Tags

NGSS.MS-PS1-1

Which equation follows the Law of Conservation of Matter?

• H₂ + O₂ ------> H₂O

• C + 2H₂ ----> CH₄

• 2Fe₂O₃ ------> 2O₂ + 4Fe

Tags

NGSS.MS-PS1-5

How many atoms of aluminum are on each side of the following equation:

4 Al + 3 O₂ → 2 Al₂O₃

• 2

• 6

• 1

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5