Topic 6 Chemical calculations

Poll

Do you understand so far? 明白了吗？

• yes I fully understand, 是的，明白了

• yes, but I a question, 是的，可是我有问题

• no, I do not understand, 不是， 不懂

Drag and Drop

V=​

Placeholder

*​​

Placeholder

Drag these tiles and drop them in the correct blank above

n

Vm

m

E

Fill in the Blank

type in the answer (moles) for 1a

.

Fill in the Blank

type in the answer (moles) for 1b

Fill in the Blank

type in the answer (moles) for 1c

.

Fill in the Blank

type in the answer (moles) for 1c

.

Fill in the Blank

type in the answer (moles) for 2a

Fill in the Blank

type in the answer (moles) for 2b

.

Fill in the Blank

type in the answer (moles) for 2c

.

Dropdown

what is the volume of oxygen and carbon dioxide in B?

oxygen​

Select answer

cm3 and carbon dioxide​

Select answer

cm3

Dropdown

what is the volume of oxygen and carbon dioxide in C?

oxygen​

Select answer

cm3 and carbon dioxide​

Select answer

cm3

Dropdown

what is the volume of oxygen and carbon dioxide in D?

oxygen​

Select answer

cm3 and carbon dioxide​

Select answer

cm3

Multiple Choice

1) moles of Mg​ ​

2) mole of hydrogen

3) volume of hydrogen

• 1) 0.02

  2) 0.01

  3) 0.24

• 1) 0.02

  2) 0.02

  3) 0.48

• 1) 0.01

  2) 0.01

  3) 0.24

• 1) 0.01

  2) 0.02

  3) 0.48

Fill in the Blank

type in the final answer, mass of KNO3. make sure you use your notebook and write notes/how you calculated the answer

.

Reorder

Reorder the following into a->b->c

• 0.05 mol/dm3

• 0.8 mol/dm3

• 0.054 mol/dm3

1

2

3

• 1
• 2
• 3

Fill in the Blank

what is the mass of barium sulfate?

.

Fill in the Blank

1.calculate moles of sodium hydroxide

2.find moles of sulfuric acid from the equation

3.calculate the volume of sulfuric acid

type in the final answer (the volume) in cm3

Fill in the Blank

1.calculate moles of calcium carbonate

2.find moles of hydrochloric acid from the equation

3.calculate the volume of hydrochloric acid

type in the final answer (the volume) in cm3

Hotspot

choose the one in excess for a,b,c

Multiple Choice

What is the mass of 0.25 moles of hydrated copper(II) sulfate, CuSO₄.5H₂O? Relative formula mass (M ): H₂O = 18 CuSO₄= 160

• 62.5 g
• 50 g
• 75 g
• 100 g

Multiple Choice

Calculate the concentration, in mol / dm³, of a solution produced when 6.9 g of potassium carbonate, K₂CO₃, dissolves in 200 cm³ of water. [Mr of K₂CO₃ = 138 ]

• 0.05

• 0.20

• 0.25

• 0.50