mckayboyd1
14.10.2019 •
Chemistry
How much of 90% ethanol must be mixed with 10% ethanol to make 1 pint of a 40% ethanol solution?
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Ответ:
Amount of 10% Ethanol=0.625 pint
Because:
90x+10y=40
x+y=1
x=1-y
90(1-y)+10y=40
90-90y+10y=40
90-80y=40
80y=50
y=5/8
x=1-5/8=3/8
Ответ:
i hope this helps
Explanation:
Electromagnetic Induction by a Moving Magnet
Then the action of moving a coil or loop of wire through a magnetic field induces a voltage in the coil with the magnitude of this induced voltage being proportional to the speed or velocity of the movement.