Question

Problema 3 cat mai repede.Toate subpunctele.Va rog repede​

Answer 1

a.

m.apa = 200 mL x 1g/mL = 200g

md = 8g

ms = md+m.apa = 200+8 = 208 g

c% = mdx100/ms

8x100/208 = 3,85%

b.

md2 = md1 + 8 = 8+8 = 16g

ms2 = ms1+8 = 208+8 = 216g

c2% = 16x100/216 = 7,4%

c.

ms3 = ms2+100 = 216+100 = 316g

c3% = 16x100/316 = 5,06%

d.

solutia initiala

ms = 208g , md = 8g

solutia obtinuta;

ms= 300+8 = 308g , md = 8g

=>

md.final = 8+8 = 16g

ms.final = 208+308 = 516g

=> c% = 16x100/516 = 3,1%

e.

notam cu a = masa de zahar adaugata

md2 = md1 + a = 8+a

ms2 = ms1 + a = 208+a

13,79 = (8+a)100/(208+a)

=> a = 2068,32/86,21 = 24 g zahar adaugat (rezultat rotunjit)

=> 24/8 = 3 pliculete de zahar vanilat