Ammonia (NH3) clouds are present around some planets. Calculate the number of grams of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen N2 + 3 H2 -> 2 NH3

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

If a solution had a ph of 7 what is the solution