← CSEC Chemistry quizzes
0 / 21 marks

7.4 - Mole and Chemical Reactions

Question 1 of 210 correct · 0 wrong

No need to finish in one go. Your answers save automatically, so you can do a section and come back anytime.

✅EvaluateQuestion 1 of 21

Which statement best defines one mole of a substance?

0 / 1 marks
✅EvaluateQuestion 2 of 21

Which of the following represents a correct chemical formula?

0 / 1 marks
✅EvaluateQuestion 3 of 21

The molar mass of carbon dioxide (CO₂) is:

0 / 1 marks
✅EvaluateQuestion 4 of 21

How many moles are present in 18 g of water (H₂O)? (M = 18 g/mol)

0 / 1 marks
✅EvaluateQuestion 5 of 21

Which of the following correctly represents Avogadro’s number?

0 / 1 marks
✅EvaluateQuestion 6 of 21

The balanced equation for water formation is:

0 / 1 marks
✅EvaluateQuestion 7 of 21

What is the molar mass of calcium hydroxide, Ca(OH)₂?

0 / 1 marks
✅EvaluateQuestion 8 of 21

Calculate the number of moles in 48 g of magnesium. (M = 24 g/mol)

0 / 1 marks
✅EvaluateQuestion 9 of 21

How many molecules are there in 0.5 mol of CO₂?

0 / 1 marks
✅EvaluateQuestion 10 of 21

The number of moles of oxygen atoms in 2 mol of CO₂ is:

0 / 1 marks
✅EvaluateQuestion 11 of 21

In the reaction 2Mg + O₂ → 2MgO, 24 g of magnesium reacts completely with how many grams of oxygen? (M(Mg)=24, M(O₂)=32)

0 / 1 marks
✅EvaluateQuestion 12 of 21

If 2 mol of hydrogen reacts with 1 mol of oxygen, how many moles of water are formed?

0 / 1 marks
✅EvaluateQuestion 13 of 21

Which equation represents a mole ratio of 1:3:2?

0 / 1 marks
✅EvaluateQuestion 14 of 21

Calculate the mass of CO₂ produced from 2 mol of C reacting with O₂. (M(CO₂)=44 g/mol)

0 / 1 marks
✅EvaluateQuestion 15 of 21

3 mol of hydrogen gas reacts with nitrogen to form ammonia. How many moles of ammonia are formed?

0 / 1 marks
✅EvaluateQuestion 16 of 21

20 g of calcium reacts with chlorine gas to form calcium chloride (CaCl₂). (M(Ca)=40, M(CaCl₂)=111) What mass of CaCl₂ is produced?

0 / 1 marks
✅EvaluateQuestion 17 of 21

What mass of aluminium oxide (Al₂O₃) is formed from 27 g of aluminium? (M(Al)=27, M(Al₂O₃)=102)

0 / 1 marks
✅EvaluateQuestion 18 of 21

Which step must always be performed first in a mole calculation involving a chemical equation?

0 / 1 marks
✅EvaluateQuestion 19 of 21

How many oxygen atoms are in 0.25 mol of H₂O?

0 / 1 marks
✅EvaluateQuestion 20 of 21

A 5 g sample of calcium carbonate (CaCO₃) decomposes completely. How many grams of carbon dioxide (CO₂) are produced? (M(CaCO₃)=100, M(CO₂)=44)

0 / 1 marks
✅EvaluateQuestion 21 of 21

Which equation represents the law of conservation of mass?

0 / 1 marks
✅EvaluateQuestion 1 of 21

Which statement best defines one mole of a substance?

0 / 1 marks

← swipe to move between questions →