Question

Question #0cfa7

Answer 1

mass = `23.17g`

Explanation:

First, we'll find the number of moles of `(NH_4)_2SO_4` needed. To do this, we'll use the equation: moles = concentration * volume:
moles = 0.25 * 0.07L (Convert volume to litres)
= 0.0175mol of `(NH_4)_2SO_4`

But because the question asks for mass, so we'll need to find that using the question: mass = moles * molar mass.
mass = `0.175`mol * `((14.01+1.008*4)*2+32.07+16.00*4)`
mass = `0.175*132.154`
mass = `23.17g` (result will always be in grams)

Note if you need help finding molar mass, please say so