Question
DR Bob,
can you go through the steps to work this out please....
how many grams of alcohol with a density of 0.900 g/cm ^3 (cm cubed) will have the same volume as 20.0g of mercury,with a density of 13.6 g/cm ^3
Do you have to find the volume of mercury first???
I know the answer is 1.32....i just don't know how to get there....
Thanks ANDY
can you go through the steps to work this out please....
how many grams of alcohol with a density of 0.900 g/cm ^3 (cm cubed) will have the same volume as 20.0g of mercury,with a density of 13.6 g/cm ^3
Do you have to find the volume of mercury first???
I know the answer is 1.32....i just don't know how to get there....
Thanks ANDY
Answers
The volumes are the same. Volume in mass divided by density.
(mass/density) of mercury = (mass/density) of alcohol
Alcohol mass = [(alcohol density)/(mercury density)]*(mecury mass)
= (0.900/13.6)*20 = 1.324 g
Rouded to two figures, that is 1.32 g
(mass/density) of mercury = (mass/density) of alcohol
Alcohol mass = [(alcohol density)/(mercury density)]*(mecury mass)
= (0.900/13.6)*20 = 1.324 g
Rouded to two figures, that is 1.32 g
thanks..... andy
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