tolong plisss di kerjakan ya

1) n = JP/L
=3,01 • 10^24/6,02 • 10²³
= 5 mol
w = n x ar
= 5 x 59
= 295g

2)n = V/Vm
= 10/22,4
= 0,44 mol
w = n x mr
= 0,44 x 44
= 19,6g

3) n = V/Vm
= 5,6/22,4
= 0,25 mol
w = n x mr
= 0,25 x 16
= 4g

4) n NaOH = w/mr
=2/40
=0,05 mol
100mL = 0,1L
M = n/L
= 0,05/0,1
= 0,5M

5) n Urea = w/mr
= 3/60
= 0,05 mol
200g = 0,2kg
m = n/kg
= 0,05/0,2
= 0,25m

6) 12% = 12g glukosa dalam 100g larutan
g pelarut = 100-12 = 88g
88g = 0,088 kg
n glukosa = w/mr
= 12/180
= 0,067 mol
m = n/kg
= 0,067/0,088
= 0,76m

7) 20% = 20g urea dalam 100g larutan
g pelarut = 100-20 = 80g
mol pelarut = w/mr = 80/18 = 4,44 mol
mol urea = w/mr = 20/60 = 0,33 mol
f Urea = mol Urea/mol urea + mol air
= 0,33/0,33+4,44
= 0,33/4,77
= 0,07

8) b NaCl = 50g
b air = 150ml = 150g
% berat= 50/150+50 x 100%
= 50/200 x 100%
= 25%

9) V alkohol = 30mL
V air = 150mL
%volume = 30/150+30 x 100%
= 30/180 x 100%
= 16,67%