HEL!! Nitrogen and hydrogen react to produce ammonia.

N2(g) + 3H2(g)—>2NH3(g)

How many grams of hydrogen are needed to produce 15.0 mol of ammonia if the reaction goes to completion?

A. 15.0 g
B. 22.5 g
C. 90.0 8
D. 45.0 g

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?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f