The most common source of copper (cu) is the mineral chalcopyrite (cufes2). how many kilograms of chalcopyrite must be mined to obtain 370. g of pure cu?

What is the noble gas notation for carbon?

The lighter elements of Group I and II have distinctly different chemistry from their heavier congeners. For example, Be and Li both have a strong tendency to form polymer-like structures with bridging atoms whereas the heavier elements do not.

If you combine 25.0 gg of a solute that has a molar mass of 25.0 g/molg/mol with 100.0 gg of a solvent, what is the molality of the resulting solution?

Write a balanced chemical equation for the standard formation reaction of gaseous formaldehyde CH2O

The element 238 and 92 has how many neutrons? 330 238 184 146 92

What does the chemical formula of an ionic compound represent?

The wavelength of some yellow light is 580.0 nm. What is the frequency of this yellow light?

A sample of chlorine gas contracts from 550 mL to 376 mL when it is cooled from 63 °C to 12 °C. If the initial pressure of the chlorine was 725 torr, what is the final pressure of the chlorine?

The skin and lungs get rid of this waste? What does it het rid of?

What is the molarity of a solution which contains 58.5 g of sodium chloride dissolved in 0.500 l of solution?