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- @AtGraphic 130,100
- '@Picture AEC20_01.bmp
- @At 135,15
- If 4.6g of sodium is heated and plunged into a gas jar of chlorine
- what is the mass of chlorine that would react?
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- @PlaySoundFile AEC20_01.wav
- @WaitForSoundToFinish
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- @Prompt
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- @At 134,88
- Step 1 Write the equation #[N36]
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- @Answer 1
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- @Feedback Wrong
- #bNo#b, two sodium atoms are needed to react with each chlorine
- molecule.
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- @Animation BoseGrim
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- @Feedback Correct
- #bCorrect#b
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- @Animation BoseSmile
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- @Question
- @Prompt
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- @AtGraphic 129,191
- @Picture AEC20_03.bmp
- @At 132,129
- Step 2 calculate number of moles of sodium
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- No of moles = #^mass = #^4.6 = #[N36]
- #tRAM #t#[N36]
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- @Answer 23,0.2
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- @Feedback Wrong
- #bNo#b, No, the RAM of sodium is 23. 4.6/23 = 0.2 therefore the
- number of moles is 0.2.
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- @Animation BoseGrim
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- @Feedback Correct
- #bCorrect!#b
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- @Animation BoseSmile
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- @Question
- @Prompt
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- @At 133,205
- Step 3 work out the mole ratioThe mole ratio of Na to Cl2 is #[N36]:#[N36]
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- @Answer 2,1
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- @Feedback Wrong
- #bNo#b, 2 moles of sodium react with 1 mole of chlorine so the
- ratio is 2:1.
- @Animation BoseGrim
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- @Feedback Correct
- #bCorrect!#b
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- @Animation BoseSmile
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- @Question
- @Prompt
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- @At 135,250
- Step 4 work out the number of moles of the second substanceNumber
- of moles of Cl2 = #[N36]
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- @Answer 0.1
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- @Feedback Wrong
- #bNo#b, the number of moles of chlorine is 0.1.
- The mole ratio is 2:1 therefore the number
- of moles of sodium chloride is 0.5 x 0.2 = 0.1
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- @Animation BoseGrim
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- @Feedback Correct
- #bYes#b,
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- @Animation BoseSmile
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- @Question
- @Prompt
- @At 135,300
- Step 5 work out the mass of the second substance
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- Mass = No of Moles x RMMMass of Cl2 = 0.1 x #[N36] = #[N36]g
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- @Answer 71,7.1
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- @Feedback Wrong
- #bNo#b, the RMM of chlorine is 2 x 35.5 = 71. Multiplying
- this by 0.1 gives you 7.1g of chlorine.
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- @Animation BoseGrim
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- @Feedback Correct
- #bYes#b,
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- @Animation BoseSmile
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- '#bYes#b,
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- '@Animation BoseSmile
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