How many grams are in 5.0 L of #H_2O#?

1 Answer
Aug 9, 2017

Answer:

#5000# #"g H"_2"O"#

Explanation:

We're asked to find the number of grams in #5.0# #"L H"_2"O"#.

To do this, we can use the density of water, which is #color(purple)(1color(white)(l)"g/mL"#, to convert from liters to moles:

#5.0cancel("L H"_2"O")((10^3cancel("mL"))/(1cancel("L")))((color(purple)(1color(white)(l)"g H"_2"O"))/(1cancel("mL"))) = color(red)(5.0xx10^3color(white)(l)"g H"_2"O"#

(rounded to #2# significant figures).

Thus, in five liters of water, there are #color(red)(5.0xx10^3color(white)(l)"grams of water"# (using #2# significant figures, the amount given in the problem).