First Online Quiz
15 Questions
| Total Attempts: 177
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This is a quiz about the types of chemical reactions and their stoichiometry. Equip yourself with a periodic table, calculator and scratch papers before starting this quiz. Don't include the units in all your answers. GOOD LUCK!
Questions and Answers
- 1.Consider oxalic acid, H2C2O4.The reaction of oxalic acid with magnesium metal produces hydrogen gas and magnesium oxalate. What type of reaction is this (called reaction 1 - write this equation for later questions)? [acid/base, precipitation or redox]
- 2.The reaction of oxalic acid with calcium chloride produces calcium oxalate and hydrogen chloride. What type of reaction is this(called reaction 2 - write this equation for later questions)? [acid/base, precipitation or redox]
- 3.The reaction of oxalic acid with potassium hydroxide produces potassium oxalate and water. What type of reaction is this(called reaction 3 -write this equation for later questions)? [acid/base, precipitation or redox]
- 4.In the balanced equation of reaction 1, what is the coefficient of hydrogen gas?
- 5.In the balanced equation of reaction 2, what is the coefficient of calcium chloride?
- 6.In the balanced equation of reaction 3, what is the coefficient of potassium hydroxide?
- 7.136C is an isotope of carbon. What will be the element produced when it undergoes beta decay?
- 8.136C is an isotope of carbon. What will be the element produced when it undergoes electron capture?
- 9.136C is an isotope of carbon. What will be the element produced when it undergoes positron emission?
- 10.How many moles (in 3 significant figures) are there in 10.0 grams of magnesium? [AW, Mg = 24.3 g/mol]
- 11.How many molecules (in ___ x 1023, 3 significant figures) are there in 10.0 grams of magnesium? [AW, Mg = 24.3 g/mol]
- 12.In the reaction (oxalic acid + magnesium), how many grams (3 significant figures) of oxalic acid will exactly react with 10.0 g magnesium? [atomic weights: Mg = 24.3 g/mol, H = 1 g/mol, C = 12 g/mol, O = 16 g/mol]
- 13.If 10.0 grams magnesium reacts with excess oxalic acid, how many grams (3 significant figures) of magnesium oxalate will be produced? [atomic weights: Mg = 24.3 g/mol, H = 1 g/mol, C = 12 g/mol, O = 16 g/mol]
- 14.If 10.0 grams magnesium reacts with 10.0 g oxalic acid, how many grams(3 significant figures) of hydrogen gas will be produced? [atomic weights: Mg = 24.3 g/mol, H = 1 g/mol, C = 12 g/mol, O = 16 g/mol]
- 15.What is the mass percent (3 significant figures)of C in oxalic acid? [atomic weights:H = 1 g/mol, C = 12 g/mol, O = 16 g/mol]
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