Question

A scientist measures the mass of Substance A as 1.789 grams. She measures the mass of Substance B as 2.185 grams. How much greater is the mass of Substance B than the mass of Substance A?

Answer 1

mass of substance A=1.789

mass of substance B=2.185

now,

mass of substance B - mass of substance A

=2.185-1.789

=0.396

hence

mass of substance B is 0.396 gram greater than the mass of substance A