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

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.

An unknown substance has been shown to have metallic bonds. which of the following is most likely a property of this substance? a. low conductivity b. low boiling point c. high malleability d. high solubility in water