A small beaker contains 55.0 mL of water. What would be the mass of the water?

1 Answer
Jun 30, 2018

Answer:

Surely it would be #55*g#?

Explanation:

For water, #rho_"density"=1.0*g*mL^-1#...

And thus the product...#rhoxx"volume"="mass"#

#-=1.0*g*cancel(mL^-1)xx55*cancel(mL)-=55.0*g#...

...this is an example of dimensional analysis where we include the units in the calculation in order to inform us whether we divide or multiply...by definition...#rho_"density"="mass"/"volume"#...