Chemistry mole & stoichiometry concepts are essential to learning for every level in chemistry courses. Here, we have compiled many chemistry mole and stoichiometry quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical and engineering students (MDCAT, ECAT, NUST, NUMS, JEE, NEET).
Before taking this quiz, you can revise your fundamental concepts in chemistry by using the following of our free resources.
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Results
#1. Given the unbalance equation below, determine how many liters of H2 gas will be produced when 51 grams of NH3 decompose completely @ STP. NH3(g) → N2(g) + H2(g)
#2. Propane burns in the presence of oxygen to produce carbon dioxide and water vapor. How many total moles of gas are produced when 50% of a 88.2 gram sample of propane combusts?
#3. An aqueous solution of NaCl gives H2(g), Cl2(g), and NaOH when an electrical current is passed through the solution. 2NaCl(aq) + 2H2O(l) → H2(g) + Cl2(g) + 2NaOH(aq) If you begin with 10. liters of 0.15 M NaCl, how many grams of NaOH can be formed?
#4. How many total liters of gas can be produced @STP if 9.0 grams of aluminum metal react with 200 mL of 10.0 M HCl? 2Al(s) + 6H+(aq) → 2Al3+(aq) + 3H2(g)
#5. Pentacarbonyliron (Fe(CO)5) reacts with phosphorous trifluoride (PF3) and hydrogen, releasing carbon monoxide: Fe(CO)5 + PF3 + H2 → Fe(CO)2(PF3)(H)2 + CO (not balanced) The reaction of 5.0 mol of Fe(CO)5, 8.0 mol of PF3 and 6.0 mol of H2 will release __________ mol of CO.
#6. Consider the following redox reaction. What is the amount of Cr3+ formed If 100.0 mL of 0.200M Cr2O7 is mixed with 100.0 mL of 0.300M Cl- solution that contains a large excess of H+? 14H+ + Cr2O7 + 6Cl- → 3Cl2 + 2Cr3+ + 7H2O
#7. Consider the following reaction. If 31.6grams of magnesium hydroxide is combined with 68.0 mL of 0.725 M HBr, how many moles of the excess reagent will be left over when the reaction is complete Mg(OH)2 (s) + 2HBr (aq) → MgBr2 (aq)+ 2H2O (l)
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