which of the following describes how ice could have once covered warm places such as australia and india

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

What physical property of gold makes panning a useful way to get gold from streams?