Chem Final Review

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.MS-PS1-1

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

Tags

NGSS.MS-PS1-1

Number of C's in 2Na₂CO₃

• 1
• 2
• 3
• 5

How many atoms of Carbon are in the compound C₂H₈O ?

• 8
• 2
• 1
• 11

How many Magnesium are in 10MgCl₂?

• 10
• 5
• 20

Tags

NGSS.MS-PS1-1

2H₂ + O₂ --------> 2H₂O What  are the reactants?

• ----->
• 2H₂O
• 2H₂ +O₂

Number of C's in CO

• 1
• 2
• 3
• 4

The law of conservation of matter states that

• chemical reactions change matter.
• in chemical reactions, the identity of reactants and products is conserved.
• atoms are neither created nor destroyed in chemical reactions.
• a chemical equation must be balanced.

Tags

NGSS.HS-PS1-7

Is this balanced?...
Al + O₂ --> 2Al₂O₃

• YES!
• NO!