rithikasaravanan007 rithikasaravanan007
  • 15-12-2018
  • Mathematics
contestada

A chemist needs a solution of tannic acid 70% pure. How much distilled water must he add to 5 gallons of acid which was 90% pure to obtain the 70% solution?

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TypicalLeon2016
TypicalLeon2016 TypicalLeon2016
  • 15-12-2018
30; If you add and subtract these numbers you should get 30%
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Аноним Аноним
  • 02-12-2019

Answer: 1.4286 gallons

Step-by-step explanation: the equation would be:

0.9*5+0x=0.7(5+x)

then you can shorten it down to:

4.5=3.5+0.7x

subtract both sides by 3.5 and you end up with:

1=0.7x

divide both sides by 0.7 and you get 1.4286 gallons

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