Chemical formulas

What is chemical formula of water?

• H₂O

• HO₂

• H₂O₂

• All

What is the chemical formula of table salt?

• NaCl

• H₂O

• CO₂

• CaCO₃

Which gas do plants use for photosynthesis?

• O₂

• CO₂

• N₂

• H₂

What is the chemical symbol for gold?

• Au

• Ag

• Fe

• Cu

Emperical formula of table sugar is CH₂O.

• Yes

• No

• I don't know

Which of the following is your favourite subject?

• Chemistry

• Biology

• Physics

• Mathematics

Water is

• Polar

• Nonpolar

• solvent of life

• important

How many atoms of hydrogen are in a molecule of glucose (C₆H₁₂O₆)?

• 12

• 6

• 18

• 4

Which of the following accurately describes the chemical formula of the molecule shown above?

• 3CH₈O

• C₃H₇O

• C₄H₈O₂

• C₃H₈O

Which of the following molecules has the formula CH₂O?

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