How many moles are there in 3.41*1022 molecules of methane (CH4)?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

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.