Can someone please explain to me how to do these problems!
I have to find the density and I already have the mass and volume.
1. 5kg, 105 L.
2. 5kg, 110 L
3. 5kg, 102.50 L
4. 5kg, 101.25 L
I got the same answer for all of them, so I don't think I'm doing it right.
:/
Please don't just give me the answer, I have more problems to do and I need to figure out how to do it myself.
Thank you in advance for your help. :)
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Answers & Comments
Verified answer
density = mass / volume...
IF we assume 5kg is exact, then...
(1).. density = 5kg / 105L = 0.0476 kg/L
(2).. density = 5kg / 110L = 0.0454 kg/L.. (or 0.045 if the 110 has 2 sig figs)
(3).. density = 5kg / 102.50L = 0.048780 kg/L
(4).. density = 5kg / 101.25L = 0.049383 kg/L
but IF 5kg has only 1 sig fig
(1).. density = 5kg / 105L = 0.05 kg/L
(2).. density = 5kg / 110L = 0.04 kg/L
(3).. density = 5kg / 102.50L = 0.05 kg/L
(4).. density = 5kg / 101.25L = 0.05 kg/L
It appears that it is an exercise in sig figs. However, since 5 kg is only one sig fig, the four "answers" are all the same: 0.05 kg/L