Срочно Сделайте пожалуйста пятую первую и десятую

Question

Срочно Сделайте пожалуйста пятую первую и десятую

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Answer 1

Ответ:

1. 20%

2. 15%

3. 21.7%

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Answer 2

1. m(HCl 1) = 150*0.2 = 30g

m (HCl 2) = 230*0.2 = 46g

w(HCl) = 76/(230+150) = 0.2 = 20%

5. m(H3PO4 в 10%) = 250*0.1 = 25g

m(H3PO4 в 20%) = 250*0.2 = 50g

m(H3PO4) = 50+25= 75g

w(H3PO4)= 75/(250+250)= 0.15 = 15%

10. m(KOH в 15%) = 350*0.15 = 52.5g

m(KOH) = 52.5+30= 82.5g

w(KOH) = 82.5/(350+30)= 0.21 = 21%

Comments

1. m(HCl 1) = 150*0.2 = 30g

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m (HCl 2) = 230*0.2 = 46g

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w(HCl) = 76/(230+150) = 0.2 = 20%

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Спасибо большое