6. Challenge yourself: Suppose you wanted to make 100 grams of water. A.
10
What is the molar mass of water (H2O)?
B.
How many moles of water are in 100 grams?
5.5
C. How many moles of hydrogen will you need?
10
D.
How many moles of oxygen
will
you
need?
80
E.
How many grams of hydrogen and oxygen will you need?
Ну
Ox
L}
Is your answer reasonable? Why or why not?

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

(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