Which of the following are the correct number of atoms when this reaction is balanced : Fe + HCl ---> FeCl3 + H2

a
2, 3, 3
b
1,2,2
c
2, 6, 3
d
this is reaction is balanced


Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?