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=​

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*​​

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Drag these tiles and drop them in the correct blank above

n

Vm

m

E

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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

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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 Blanks

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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