the ph of a solution is 3.40. what is the [h3o+] for the solution?

2.51 × 10−4 m

3.98 × 10−4 m

2.51 × 103 m

3.98 × 104 m

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

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.