Question

va rog ajutor la chimie ex 2​

Answer 1

Răspuns:

Explicație:

a. ms=50g c=10%  md=(ms*c)/100  md=(50*10)/100=5g

b. ms=250g c=30% md=(ms*c)/100 md=(250*30)/100=75g

c. ms=0.8kg=800g c=14% md=(ms*c)/100 md=(800*14)/100=112g

d. ms=2kg=2000g c=2% md=(ms*c)/100  md=(2000*2)/100=40g