Question 4 012 What mass of water must be added to 350.0 g of formaldehyde to...

Question

Question

Answer 1

Answer #1

Given:

Mass % = 30.0 %

Mass of formaldehyde = 350.0 g

Use:

Mass % = mass of formaldehyde * 100 / mass of solution

30.0 = 350.0 * 100 / mass of solution

mass of solution = 1166.7 g

Now use:

Mass of water = mass of solution - mass of formaldehyde

= 1166.7 g - 350.0 g

= 816.7 g

Answer: 816.7 g

Answer 2

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