Chemical Formulae

NaCl represents 

• Sodium bicarbonate
• Sodium carbonate
• Sodium Chloride
• Calcium Carbonate

NaOH represents 

• Sodium bicarbonate
• Sodium carbonate
• Sodium Chloride
• Sodium Hydroxide

CaCO₃ represents

• Sodium bicarbonate

• Sodium carbonate

• Sodium Chloride

• Calcium Carbonate

MgO represents 

• Magnesium  Hydroxide
• Magnesium  Chloride
• Magnesium Oxide
• Sodium Nitrate

The smallest unit of matter which can exist independently is called

• an atom

• a molecule

• a compound

• an element

How many atoms of sulfur are in each molecule of H₂SO₄?

• 1

• 4

• 2

• 7

Tags

NGSS.MS-PS1-1

How many atoms are there in the compound MgCO₃?

• 3

• 4

• 5

• 6

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

Which elements are in this compound?

H₂O

• helium and oxide

• hydrogen and oxygen

• water

• waterium and oxygen

What is the correct way to write the formula for the model of this compound?

• 2H₂0

• 2H₂O

• 2HO₂

• H₂O₂