An unknown compound contains only carbon, hydrogen, and oxygen (C2H,02). Combustion of 4.00 g of this compound produced 5.87 g of carbon dioxide and 2.40 g of water.
How many moles of hydrogen, H, were in the original sample?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.