What is the amount of solution if 25mL of ethanol is used to make an 12.5% solution?

200 mL

Explanation:

If 25 mL = 12.5%

100% = 25*100/12.5 = 200 mL

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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