During the % By Mass of Sugar in Soda Lab a group found the mass of soda used was 40.0 grams.
After all the water was evaporated, what was left in the evaporating dish weighed 5.0 grams. The
mass of the water would be
A.. unable to be calculated
B... 40.0 grams
C... 35.0 grams
D... 45.0 grams

it is b that is the answer.

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied