<p>Name:……………………………………………………. Date: ……………………</p><p>Quantitative Chemistry Worksheet This worksheet accompanies Formulae and Equations Summary and Quantitative Chemistry Summary.</p><p>1. State the number of atoms of each element in the following compounds.</p><p> a) H2O ……………………………………………….………</p><p> b) NH3 ……………………………………………….………</p><p> c) HCl …………………………………………….……….…</p><p> d) HNO3 ………………………………………………..……</p><p> e) CaCl2 …………………………………………….….……</p><p> f) H2SO4 ………………………………………………..……</p><p> g) Na2SO4 ……………………………………………...……</p><p> h) Ca(NO3)2 ………………………………………….………</p><p> i) NH4NO3 ……………………………………………….…..</p><p> j) Fe2(SO4)3 ……………………………………………..……</p><p>2. Using a periodic table, work out the relative formula mass of the following compounds.</p><p> a) NaCl ………………………………………………………</p><p> b) MgO …………………………………………….…...…… Mg</p><p> c) O2 …………………………………………………....……</p><p> d) HNO3 ………………………………………………..……</p><p> e) Al2O3 ……………………………………………..…….…</p><p> f) H2SO4 ………………………………………………...……</p><p>© Boardworks Ltd 2011 1</p><p>Name:……………………………………………………. Date: ……………………</p><p> g) NaHSO4 ……………………………………………..……</p><p> h) Al(NO3)3 ……………………………………………..……</p><p>3. Work out the percentage by mass of the following compounds.</p><p> a) What percentage by mass of chlorine is in sodium chloride (NaCl)?</p><p>……………………………………………………………..…………………………………………….</p><p> b) What percentage by mass of nitrogen is in nitric acid (HNO3)?</p><p>………………………………………………………………………………………………..………….</p><p> c) What percentage by mass of oxygen is in sulfuric acid (H2SO4)?</p><p>...... </p><p> d) What percentage by mass of nitrogen is in aluminium nitrate (Al(NO3)3)?</p><p>…………………………………………………………………………………………….…...…..……</p><p> e) What percentage by mass of phosphate is in potassium phosphate (K3PO4)?</p><p>………………………………………………………………………………………….……………….</p><p>4. Balance the following equations.</p><p> a) K + H2O → KOH + H2</p><p> b) Na + Cl2 → NaCl</p><p> c) Zn + HNO3 → Zn(NO3)2 + H2</p><p> d) LiOH + H2SO4 → Li2SO4 + H2O</p><p> e) Fe2O3 + CO → Fe + CO2</p><p> f) C2H6 + O2 → CO + H2O</p><p>5. a) Calculate the mass of sulfur dioxide produced when 1 kg of sulfur burns in oxygen. </p><p>S + O2 → SO2</p><p>© Boardworks Ltd 2011 2</p><p>Name:……………………………………………………. Date: ……………………</p><p>..………………………………………………………………………………………..</p><p>……………………………………………………………………………………………………………</p><p>……………………………………………………………………………………………………………</p><p>………………</p><p>© Boardworks Ltd 2011 3</p><p>Name:……………………………………………………. Date: ……………………</p><p> b) Calculate the mass of magnesium oxide formed when 25 g of magnesium reacts with oxygen.</p><p>2Mg + O2 → 2MgO Mg</p><p>..……………………………………………………………………...…………………..</p><p>……………………………………………………………………………………………………………</p><p>……………………………………………………………………………………………………………</p><p>………………</p><p> c) Calculate the maximum mass of aluminium which can be extracted from 10 kg of aluminium oxide.</p><p>2Al2O3 + 3C → 4Al + 3CO2</p><p>..………………………………………………………………………………………..…………….</p><p>…………………………………………………………………………………………………...... …….</p><p>……………………………………………………………………………………………………………</p><p>…</p><p> d) Calculate the mass of carbon dioxide produced when extracting 100 kg of iron using the equation.</p><p>Fe2O3 + 3CO → 2Fe + 3CO2</p><p>..………………………………………………………………………………………..…………...</p><p>…………………………………………………………………………………..</p><p>…………………………….</p><p>……………………………………………………………………………………………………………</p><p> e) Calculate the mass of sodium chloride formed when 100g of sodium is burnt in chlorine.</p><p>2Na + Cl2 → 2NaCl</p><p>© Boardworks Ltd 2011 4</p><p>Name:……………………………………………………. Date: ……………………</p><p>..………………………………………………………………………………………………………..</p><p>….………….…..…………………………………………………………………………...</p><p>……………………………….……..…………………………………………………………………...</p><p>………………</p><p>© Boardworks Ltd 2011 5</p>