2C2H6+7O2=4CO2+6H2O. In the above balanced equation, how many molecules are there of each of the following(hint: convert moles to molecules):
a. C, H.
b. 02

C. CO,
d. H2O

It would be (at) + cu (s)

It’s b. mass i searched it up

Particle exchange energy though elastic collision , hope this .

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.