Relative formula mass
10th grade (Year 11 in England) · 16 questions · Common Core: NGSS.HS-PS1-7 · England: KS4 Combined Science: Chemical changes (quantitative chemistry)
Name
Date
Score/ 16
Question 1
What is the percentage by mass of chlorine in HCl? Relative atomic masses: H = 1, Cl = 35.5. Give 1 decimal place.
Answer%
Question 2
Calculate the relative formula mass (Mr) of aluminium (aluminum) oxide, Al₂O₃. Relative atomic masses: Al = 27, O = 16.
Answer
Question 3
Calculate the relative formula mass (Mr) of CO₂. Relative atomic masses: C = 12, O = 16.
Answer
Question 4
What is the percentage by mass of carbon in C₆H₁₂O₆? Relative atomic masses: C = 12, H = 1, O = 16. Give 1 decimal place.
Answer%
Question 5
Calculate the relative formula mass (Mr) of glucose, C₆H₁₂O₆. Relative atomic masses: C = 12, H = 1, O = 16.
Answer
Question 6
Calculate the relative formula mass (Mr) of CO₂. Relative atomic masses: C = 12, O = 16.
Answer
Question 7
What is the percentage by mass of sodium in NaCl? Relative atomic masses: Na = 23, Cl = 35.5. Give 1 decimal place.
Answer%
Question 8
Calculate the relative formula mass (Mr) of magnesium nitrate, Mg(NO₃)₂. Relative atomic masses: Mg = 24, N = 14, O = 16.
Answer
Question 9
Calculate the relative formula mass (Mr) of H₂SO₄. Relative atomic masses: H = 1, S = 32, O = 16.
Answer
Question 10
What is the percentage by mass of oxygen in CO₂? Relative atomic masses: C = 12, O = 16. Give 1 decimal place.
Answer%
Question 11
Calculate the relative formula mass (Mr) of sodium hydroxide, NaOH. Relative atomic masses: Na = 23, O = 16, H = 1.
Answer
Question 12
Calculate the relative formula mass (Mr) of NH₃. Relative atomic masses: N = 14, H = 1.
Answer
Question 13
What is the percentage by mass of oxygen in H₂O? Relative atomic masses: H = 1, O = 16. Give 1 decimal place.
Answer%
Question 14
Calculate the relative formula mass (Mr) of iron(III) oxide, Fe₂O₃. Relative atomic masses: Fe = 56, O = 16.
Answer
Question 15
Calculate the relative formula mass (Mr) of CaCO₃. Relative atomic masses: Ca = 40, C = 12, O = 16.
Answer
Question 16
What is the percentage by mass of nitrogen in (NH₄)₂SO₄? Relative atomic masses: N = 14, H = 1, S = 32, O = 16. Give 1 decimal place.
Answer%
Write your answers right on the page. · Free from eurekami.com