Question

what mass of NH4oH will be needed to prepare 250ml of 20m solution​

Answer 1

Explanation:

Explanation: My question is this x-x-1/2=1-x-2/3 give me a answer and I give a answer of your question

Answer 2

Answer:

Explanation:

Molarity = moles of solute/ volume of solution (in litres)

20= moles × 1000/ 250

20 = moles × 4

moles of NH₄OH = 5 mole

molar mass of NH₄OH = 14 + 1 × 4 + 16 + 1     (∵ N = 14, H= 1, O= 16)

                                    =  14 +4 + 16  + 1

                                   =35 g

moles = mass/ molar mass

5= mass of NH₄OH/ 35

mass of NH₄OH = 5 × 35

mass of NH₄OH = 175 g