9×27+2×31-28= 7,567
n=7,567
I would prominently take 10 hours til they are 4,800 miles apart
The new mixture has a total volume of 5 L + 9 L = 14 L.
70% of the 5 L alcohol solution is alcohol, so that it contributed 3.5 L of alcohol to the mixture. The pure water contributed no alcohol. So in the mixture, the concentration of alcohol is
3.5 L / 14 L = 0.25, or 25%
Do you have a picture of the question??
