Chemical Reactions Review 2024

The law of conservation of mass states that

• The mass of a system (reaction) increases from beginning to end

• The mass of a system (reaction) stays the same from beginning to end

• The mass of a system (reaction) decreases from beginning to end

Tags

NGSS.MS-PS1-5

Which are the reactants in the equation shown?

• H₂O and CO₂
• O₂ and CH₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the product in the reaction shown?

• Al₂O₃

• Al

• O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.MS-PS1-1

How many Oxygen (O) atoms are in one molecule of C₂HO₈C_l2

• 2

• 16

• 8

• 5

Tags

NGSS.MS-PS1-1

Smallest particle of an element

• Matter

• Atom

• Molecule

• Crystal

Tags

NGSS.MS-PS1-1

Which are NOT elements?

• NaCl

• H₂O

• C₆H₁₂O₆

• h

• N

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Tags

NGSS.MS-PS1-1

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

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

How many atoms of Hydrogen are in this compound

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1