HELP ME PLSSS

1- C6H9OG
2- C4H5O4
3- C1H1.5O4
4- C9H12O9
5- C4H7O4

100mg magnesium reacts with 20ml of 1.0m hcl

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)