Question

ex 5 VA ROG muuuulttt

Answer 1

sol 1

m.apa1 = 20 g

c%1 = 20%

stim ca c% = mdx100/ms, unde ms = md + m.apa

=> 20 = md1x100/(md1+m.apa1)

=> 100md1 = 20(md1+m.apa1)

=> 100md1 = 20md1 + 20m.apa1

=> md1 = 0,5 g

sol 2

m.apa2 = 30 g

c%2 = 40%

stim ca c% = mdx100/ms, unde ms = md + m.apa

=> 40 = md2x100/(md2+m.apa2)

=> 100md2 = 40(md2+m.apa2)

=> 100md2 = 40md2 + 40m.apa2

=> md2 = 2 g

sol. finala va avea:

md.total = md1 + md2

ms.final = md.total + m.apa1 + m.apa2

=> md.total = 0,5 + 2 = 2,5 g

=> ms.final = 2,5 + 20 + 30 = 52,5 g

=> c%.finala = md.totx100/ms.final

=> c%final = 2,5x100/52,5

=> c5.final = 4,76%