Question

e
Milan is measuring the density of ethanol. He weighs a bottle three times:
first, empty; then filled with water; then filled with ethanol. Here are his
results:
mass of empty bottle =
30.0g
mass of bottle filled with water = 90.0g
mass of bottle filled with ethanol = 78.0g
i Calculate the volume of the bottle.
ii Calculate the mass of the ethanol.
iii Calculate the density of ethanol.​

Answer 1

Answer:

HELLO! ☺✔️

Morningfox got i by:

mass water = 90 g - 30 g = 60 g

the problem tells you that 1 g of water has a volume of 1 cm^3, so 60 g of water has a volume of 60 cm^2.

This part really is that easy.

ii. This is also easy: 78 g - 30g = __?__ g.

iii. You know the volume of the bottle. You know the mass of the ethanol. Density = mass divided by volume.

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