Question

Va rog ! Dau coroana !​

Answer 1

Răspuns:

Explicație:

1.

ms= 600

c1=30%

md2=20g

cf

md1= c1.ms : 100

md1= 30 . 600 : 100=180g

-se afla md total

md t= 180 + 20=200 g

- ms este aceeasi

cf = mdf .100 : ms

c f= 200 .100: 600=33,3 %

2.

ms=500g

c=20%

md adaugat=30g

c f

md= c. ms : 100

md= 20 .500 : 100= 100g

mdtotal= 100 + 30= 130g

c f= 130 .100 : 500=26%

3.

ms1=400g

c1=30%

ms2=200g

c2=10%

mapa adaugata= 400 g

c f

md1= c1 . ms1 : 100

md1=30 . 400 : 100=120g

md2= 10 . 200 : 100= 20g

md f= 120 + 20= 140 g

ms f= 400 + 200 + 400 = 1000g

c f= md f .100 : ms f

c f= 140 .100 : 1000 = 14 %

4.

ms1=1200g

c1=10%

c2= 20%

mapa evaporata

c1= md .100 : ms1

md= c1 . ms1 : 100

md= 10 . 1200 : 100=120g

c2= md .100 : ms2

ms2= md.100 : c2

ms2= 120. 100 : 20=600g

m apa evap.= ms1 - ms2

                  = 1200 - 600= 600 g

sau :se calculeaza m1 apa din prima sol.    

           se calc. m2apa din a doua sol.

           mapa evap. = m1apa - m2 apa