Use an energy profile diagram to illustrate the effect of a positive catalyst on the rate of the forward reaction N2 + 3H2 = 2NH3​

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .