How many carbon atoms are there in 200 molecules of C3H2O? O 1.20 x 1026
0 3.61 x 1026
200
600

Explanation:

We are given this compound with the formula: C₃H₂O

According the subscripts, 1 molecule contains 3 carbon atoms, 2 hydrogen atoms, and 1 oxygen atom.

We can make a ratio. There are 3 carbon atoms for every 1 molecule of C₃H₂O.

Since we want to calculate the number of atoms in 200 molecules, we can multiply the ratio by 200.

200 molecules of C₃H₂O contains 600 atoms of carbon.

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(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