Which of the following reactions will not take place?
A. solid zinc with hydrochloric acid
B. solid copper with hydrochloric acid
C. solid lead with hydrochloric acid
D. solid lithium with hydrochloric acid

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?