Q.1.
What is the relative formula mass of copper sulfate CuSO ?
Q.2.
What is the relative formula mass of MgF ?
Q.3.
What % mass of magnesium oxide is magnesium?
Q.4.
What is the % mass of hydrogen in methane CH ?
Q.5.
Calcium reacts with oxygen as shown by this reaction 2Ca + O → 2CaO. What mass of oxygen will react with 60g of calcium?
Q.6.
Sodium hydroxide reacts with chlorine to make bleach as shown by this reaction. 2NaOH + Cl → NaOCl + NaCl + H O. If we have a solution containing 100g of sodium hydroxide, how much chlorine gas should we pass through the solution to make bleach?
Q.7.
If 9g of aluminum reacts with 35.5g of chlorine, what is the empirical formula of the compound formed?
Q.8.
A compound contains 13.5g of calcium, 10.8g of oxygen and 0.675g of hydrogen. What is its empirical formula?
Q.9.
A reaction that could theoretically produce 200g of product only produces 140g. What is its % yield?
Q.10.
Ammonium nitrate NH NO is used as a fertilizer. What is the % mass of nitrogen in it?