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)

At stp, what is the volume of 1 mole of co2?

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.