If a liquid has a density of #rho=1.30*g*mL^-1#, what is the mass of a #300*mL# volume?

1 Answer
anor277
Jan 13, 2018

#"Mass"=390.0*g#

Explanation:

By definition, #rho_"density"#, is given by the quotient....

#rho="Mass of substance"/"Volume of substance"#...and typically for chemists we use the units #g*mL^-1-=g*cm^-3#, which units the quotient gives us...

And so for mass we take the product, #rhoxx"volume"="mass"#...

And such a product certainly gives us the required units. We want an answer with units of grams, and the product gives us...

#g*mL^-1xxmL-=g# as required....

And so we just multiply...

#300*mLxx1.30*g*mL^-1-=??*g#

This is approx. the density of the Dead Sea. Would you be more buoyant or less buoyant in this water with respect to fresh water?

Happy with this spray?

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