What is the empirical formula for a compound that has 1.5 moles of copper and 0.5 moles of phosphorus

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

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size