Chemistry 9 Gen - Term 3 Review
Authored by Lim Wilson
Chemistry
9th Grade
Used 42+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Stoichiometry, the ratio of moles is equal with the ratio of ...
volumes
coefficients
masses
concentrations
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which statement is correct about Stoichiometry?
Ratio of moles is the same with ratio of volumes.
At the same pressure and temperature, gases with the same coefficients will have equal volume.
The moles of all substances in the same chemical reaction are always the same.
Ratio of moles is the same with ratio of masses.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4 Li + O2 → 2Li2O
The ratio of moles between Li and O2 is ...
2 : 1
1 : 2
1 : 4
4 : 1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Use the information below to answer questions No. 4, 5 and 6.
150 cm3 of hydrochloric acid 0.2 mol/dm3 is used to neutralise 200 cm3 of magnesium hydroxide as shown in the reaction below.
Mg(OH)2(aq) + 2 HCl(aq) → MgCl2(aq) + 2 H2O(l).
What is the moles of hydrochloric acid?
0.0300 moles
0.750 moles
30.0 moles
750. moles
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the information below to answer questions No. 4, 5 and 6.
150 cm3 of hydrochloric acid 0.2 mol/dm3 is used to neutralise 200 cm3 of magnesium hydroxide as shown in the reaction below.
Mg(OH)2(aq) + 2 HCl(aq) → MgCl2(aq) + 2 H2O(l).
What is the mole ratio between hydrochloric acid and magnesium hydroxide?
2 : 1
1 : 2
1 : 1
2 : 2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Use the information below to answer questions No. 4, 5 and 6.
150 cm3 of hydrochloric acid 0.2 mol/dm3 is used to neutralise 200 cm3 of magnesium hydroxide as shown in the reaction below.
Mg(OH)2(aq) + 2 HCl(aq) → MgCl2(aq) + 2 H2O(l).
What is the concentration of magnesium hydroxide solution?
0.100 mol / dm3
0.150 mol / dm3
0.0750 mol / dm3
0.0250 mol / dm3
7.
FILL IN THE BLANKS QUESTION
2 mins • 1 pt
Fe2O3(s) → Fe(s) + O2(g) [NOT BALANCED]
What is the mass of iron produced when 20 g of iron(III) oxide is decomposed?
[Ar Fe = 56 ; O = 16]
(a)
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