Chemical formulas Pre test

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

• 3
• 6
• 12
• 24

Element or compound?
H₂O

• element
• compound

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

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

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

How many carbon atoms (C) are in a CO₂ molecule?

• 1
• 2
• 3
• 0

How many Oxygen atoms (O) are in a  molecule  of CO₂

• 1
• 2
• 3
• 0

How many Hydrogen atoms (H) are in a molecule of H₂O?

• 1
• 2
• 3
• 0

How many oxygens atoms ( O )atoms in a molecule of H₂O?

• 1
• 2
• 3
• 0

The small number to the right of an elemental symbol  ( H₂₎ is called?

•  a subscript 
• a coefficient 
• a variable 
• a divisor