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Molality

What mass of ...

Question

What mass of sodium hydroxide is dissolved in 295 g of a solution that is 12.0 % by mass NaOH ?

A

4.07 g

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B

40.7 g

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C

35.4 g

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D

65.4 g

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Solution

The correct option is C
35.4 g

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Q. The teacher instructed three students A, B and C respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (

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Q. Question 19
The teacher instructed three students 'A'. 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). A' dissolved 50g of NaOH in 100 mL of water. 'B' dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

Q. Question 19
The teacher instructed three students 'A'. 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). A' dissolved 50g of NaOH in 100 mL of water. 'B' dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

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