Predict whether the following reactions will be exothermic or endothermic.

a. n2(g)+3h2(> 2nh3
b. s(g)+o2(g) > so2(g)
c. 2h2o(g) > 2h2(g)+o2(g)
d. 2f(g) > f2(g)

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?

8. how much enthalpy/heat is transferred when 0.5113gof ammonia (nh3) reacts with excess oxygen according| to the following equation: 4nh3 +502 - 4n0+ 6h20ah = -905.4j