EASY BRAINLIEST, PLEASE HELP!! (if you answer correctly ill give you brainliest which will give you 25pts.)

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3