Practice Formulae Of Simple Compounds (3.4.1) - Atoms and Molecules

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9 questions

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6 sample questions

Question 1.
What is the chemical formula for hydrogen chloride?
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Think about the valencies of hydrogen and chlorine.
Question 2.
What are the constituent elements of water?
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Recall the chemical formula of water.
3Question 3.
What is a binary compound?
- A compound with more than two elements
- A compound with two different elements
- A pure element
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Think about the definition of 'binary'.
4Question 4.
True or False: The valency of oxygen is 1.
- True
- False
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Recall how many bonds oxygen can form.
Question 5.
Write the chemical formula for a compound containing two calcium ions and one carbonate ion.
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Consider the valency of calcium and carbonate.
Question 6.
Calculate the molecular mass of aluminum oxide (Al2O3).
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Add the atomic masses of all atoms in the formula.

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