Free Printable 7AE_Unit 4 Lesson 2 Quizizz

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7AE_Unit 4 Lesson 2 Quizizz

Total questions: 50

Worksheet time: 2hrs 0mins

Name

Class

Date

Cho thanh magie cháy trong không khí thu được hợp chất magie oxit. Biết m_Mg = 7,2 g. Tính khối lượng hợp chất.

(Mg = 24, O =16)

2,4 g

9,6 g

4,8 g

12 g

Ba + 2HCl → BaCl₂ + H₂

Để thu dược 4,16 g BaCl₂ cần bao nhiêu mol HCl.

(Ba=137, H=1, Cl=35,5)

0,04 mol

0,01 mol

0,02 mol

0,5 mol

Cho 13,7 g Ba tác dụng với 3,2 g oxi thu được hợp chất oxit. Tính khối lượng oxi sau phản ứng.

(Ba=137, O=16)

3,2 g

1,6 g

6,4 g

0,8 g

Cho 2,7 g aluminium tác dụng với oxygen, sau phản ứng thu được bao nhiêu gam aluminium oxide?

A. 1,02 gam.

B. 20,4 gam.

C. 10,2 gam

D. 5,1 gam

Người ta điều chế được 24g Cu bằng cách dùng H₂ khử đồng (II) oxit. Khối lượng đồng (II) oxit bị khử là: (Biết sản phẩm còn tạo thành nước)

A. 20g

B. 30g

C. 40g

D. 45g

Cho phương trình nung đá vôi (thành phần chính là calcium carbonate) như sau: CaCO₃ → CO₂ + CaO. Để thu được 5,6 gam CaO cần dùng bao nhiêu mol CaCO₃?

A. 0,1 mol.

B. 0,3 mol.

C. 0,2 mol.

D. 0,4 mol

Trộn 10,8 gam bột aluminium (nhôm) với bột sulfur (lưu huỳnh) dư. Cho hỗn hợp vào ống nghiệm và đun nóng để phản ứng xảy ra thu được 25,5 gam Al₂S₃. Tính hiệu suất phản ứng ?

A. 85%

B. 80%

C. 90%

D. 92%

Fe + 2HCl $\rightarrow$ $FeCl_2$ + $H_2$

Hòa tan 1,2 gam Mg bằng dung dịch HCl sau phản ứng thu được bao nhiêu gam $H_2$

0,1 gam

0,05 gam

2 gam

1,5 gam

Ba + 2HCl → BaCl₂ + H₂

Để thu dược 4,16 g BaCl₂ cần bao nhiêu mol HCl.

(Ba=137, H=1, Cl=35,5)

0,04 mol

0,01 mol

0,02 mol

0,5 mol

10.

$xAl+yHCl\rightarrow zAlCl_3+tH_2$ ; trong phương trình trên hệ số x:y:z:t lần lượt là:

2:3:2:3

2:6:2:3

1:3:1:3

1:6:1:6

11.

What is the molar mass of C₆H₁₂O₆?

180.18 g/mol

180.12 g/mol

180.24 g/mol

180.06 g/mol

12.

If you start with atoms of NaOH and are going to moles of NaOH, how many steps is it?

13.

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 6 moles H₂?

4 moles Fe

6 moles Fe

9 moles Fe

2 moles Fe

14.

N₂ + 3H₂ → 2NH₃
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

6 mol H

2 mol H

3 mol H

1 mol H

15.

2H₂ + O₂ → 2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

4 moles

8 moles

16 moles

2 moles

16.

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

256 g of O₂

576 g of O₂

288 g O₂

17.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

124 g O₂

18.

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum would be needed to completely react with 45 grams of O₂?

1.05 moles

3.75 moles

1.875 grams

1.875 moles

19.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

20.

Mg(s) + 2 HCl(aq) --> MgCl₂(aq) + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

3.8 moles

15 moles

7.5 moles

23 moles

21.

Balance the following reaction :

CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

1,2,2,2

1,2,1,1

2,1,1,1

2,1,2,1

22.

CaC₂(s) + 2H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

119 g

21.2 g

114 g

237 g

23.

Use the following equation:
NaIO₃(aq) + 6HI(aq) --> 3I₂(s) + NaI(aq) + 3H₂O(l)
How many moles of iodine can be made from 6.55 moles of NaIO₃?

4.55 moles I₂

23.18 moles I₂

19.65 moles I₂

34.99 moles I₂

24.

Using the following equation:
4NH₃(g) + 5O₂(g) --> 4NO(g) + 6H₂O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?

45.08 g O₂

133.33 g O₂

260.77 g O₂

75.92 g O₂

25.

Cl₂ + 2KBr → Br₂ + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

749 g

223 g

479 g

814 g

26.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

125.2 g O₂

27.

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum would be needed to completely react with 45 grams of O₂?

1.05 moles

3.75 moles

0.875 grams

1.875 moles

28.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

29.

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

5.2 g

2.6 g

690 g

45 g

30.

SiO₂ + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?

96 g

0.67 g

2.67 g

48 g

31.

What is a limiting reactant?

the reactant that determines how much product can be made

the reactant that is in excess

the product that you can make the most of

the amount of reactants that react with each other

32.

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

bread

jelly

peanut butter

sandwich

33.

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈what is the limiting reactant? C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

Oxygen

C₁₀H₈

Water

Carbon Dioxide

34.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl₃

Cl₂

35.

The limiting reactant

slows the reaction down

is used up first

is the reactant that is left over

controls the speed of the reaction

36.

It refers to the substance(s) that are considered to be "ingredients" of a chemical reaction.

reactants

products

catalysts

enhancers

37.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl₃

Cl₂

38.

When does a chemical reaction stop?

When the lab is finished

When the excess reactant is used up

When the limiting reactant is used up

Chemical reactions never stop

39.

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

NH₃

N₂

water

40.

1 Cheese + 2 Bread --> 1 grilled cheese

How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese?

41.

The excess reactant

is used up first

is the reactant that is left over

42.

The Formula to make S'mores is:

2C + 1M + G₂→ C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

43.

A reactant that remains after a chemical reaction stops

stoichiometry

mole ratio

excess reactant

limiting reactant

44.

Why is it important to identify the limiting reagent?

The limiting reagent speeds up the reaction.

The limiting reagent controls the amount of product formed.

If there is no limiting reagent, the reaction will not occur.

No stoichiometry calculations can be done without a limiting reagent.

45.

Using the diagram, determine the limiting reactant, the product formed is water.

oxygen

hydrogen

none of the reactant are limiting

both hydrogen and oxygen

46.

2. True or False?
A chemical reaction stops before the limiting reagent is used up.

True

False

47.

1 Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies?

48.

1 Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies?
In this senario the tires would be the _____________ reactant.

Limiting

Excess

49.

The Formula to make S'mores is:

2C + 1M + G₂→ C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), what is the limiting reactant?

Chocolate pieces (C)

Marshmallows (M)

Graham Cracker Halves (G)

There is not a limiting reactant present

50.

CH₄ + 2O₂ → CO₂ + 2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

66 grams

132 grams

33 grams

8.72

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7AE_Unit 4 Lesson 2 Quizizz

Total questions: 50

Worksheet time: 2hrs 0mins

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