Who was the inventor of the lightbulb?

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

What causes most sediment to wash or fall into a river

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car