Chemisty STAAR Level 4

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Element or compound?
H₂O

• element
• compound

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

How many atoms in all are in a molecule of serotonin? C₁₀H₁₂N₂O

• 10

• 24

• 25

• 1

Tags

NGSS.MS-PS1-1

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

What do we call the 4 in front of the Barium Hydroxide molecule?

• subscript
• number
• coefficient
• multiply

Black = Carbon (C)
White = Hydrogen (H)
What would be the formula for ethane?

• CH₄
• CH₆
• C₂H₂
• C₂H₆

Tags

NGSS.MS-PS1-1

8.5C A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?

• Nitrogen (N)
• Sulfur (S)
• Arsenic (As)
• Silicon (Si)

8.5F In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

8.5F Is this equation balanced?

• yes
• no
• Not enough information