Deter- mine how many moles of vitamin a2 contain the same number of atoms as 1.000 mol vitamin a.

1.041 mol

Explanation:

1.000 mol of vitamin A (C₂₀H₃₀O) has 20 + 30 + 1 = 51 moles of atoms. The moles of atoms in 1.000 mol of vitamin A are:

1.000 mol Vit A × (51 mol Atoms/ 1 mol Vit A) = 51.00 mol Atoms

If vitamin A2 has the same number of atoms, it also has the same number of moles of atoms, that is, 51.00 moles of atoms.

1 mol of vitamin A2 (C₂₀H₂₈O) has 20 + 28 + 1 = 49 moles of atoms. The moles of vitamin A2 that contains 51.00 moles of atoms are:

51.00 mol Atoms × (1 mol Vit A2/49 mol Atoms) = 1.041 mol Vit A2

(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