Find mass when density of first liquid is 1.44g/cm3 and density of second liquid is 1.48g/cm3 and both having a volume of 25cm3?

1 Answer
anor277
Aug 1, 2018

I make it approx. #73*g#..

Explanation:

By definition...

#rho_"density"="mass"/"volume"#, so all we have to do to get the mass is to take the PRODUCT...

#"mass"=rhoxx"volume"#.

And so #"mass"_"liquid 1"=1.44*g*cancel(cm^-3)xx25*cancel(cm^3)=36*g.#

#"mass"_"liquid 2"=1.48*g*cancel(cm^-3)xx25*cancel(cm^3)=37*g.#

And so what is #(36+37)*g#?

Note that here we have performed the calculation dimensionally and included the units. We got an answer with units of volume, the which persuades us that we got the order of operations right, and have not ballsed up.

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