Chemical formulae
8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-1 · England: KS3 Chemistry: Atoms, elements and compounds, KS4 Combined Science: Chemical changes
Name
Date
Score/ 16
Question 1
How many different elements are in calcium hydroxide, Ca(OH)₂?
Answer
Question 2
How many oxygen atoms (O) are in C₆H₁₂O₆?
Answer
Question 3
How many atoms in total are in one molecule (formula unit) of sodium chloride, NaCl?
Answer
Question 4
How many different elements are in calcium hydroxide, Ca(OH)₂?
Answer
Question 5
How many hydrogen atoms (H) are in NH₃?
Answer
Question 6
How many atoms in total are in one molecule (formula unit) of methane, CH₄?
Answer
Question 7
How many different elements are in sodium hydroxide, NaOH?
Answer
Question 8
How many oxygen atoms (O) are in Fe₂O₃?
Answer
Question 9
How many atoms in total are in one molecule (formula unit) of sodium hydroxide, NaOH?
Answer
Question 10
How many different elements are in ethanol, C₂H₅OH?
Answer
Question 11
How many magnesium atoms (Mg) are in MgO?
Answer
Question 12
How many atoms in total are in one molecule (formula unit) of ammonia, NH₃?
Answer
Question 13
How many different elements are in ethanol, C₂H₅OH?
Answer
Question 14
How many oxygen atoms (O) are in H₂O?
Answer
Question 15
How many atoms in total are in one molecule (formula unit) of carbon dioxide, CO₂?
Answer
Question 16
How many different elements are in glucose, C₆H₁₂O₆?
Answer
Write your answers right on the page. · Free from eurekami.com