Zn + 2HCl → ZnCl2 + H2 15 grams of HCl should theoretically produce 0.42 grams of H2 . The reaction actually produced 0.15 grams of H2 . What is the percent yield of H2?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world