At standard temperature and pressure, a given sample of water vapor occupies a volume of 2.80 L. How many hydrogen atoms are present in the container?

What’s the percent by mass of carbon in c10h14n2

State one important difference between a physical change and a chemical change?

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.