Harry has a sample of an unknown material. The sample has a mass of 81 grams and a volume of 0.9 cubic centimeters. What is the density of the sample in grams per cubic centimeter?

Give two examples of how our society uses isotopes

Which two elements in the periodic table have the same number of electrons in their outer orbitals?

4. Is the mass of the products of a nuclear fission reaction compared to the mass 11 1 F of the original reactants the same, greater, or less?

Which equation obeys the law of conservation of mass? 2Fe + 3O2 → 2Fe2O3 4Fe + O2 → 2Fe2O3 Fe + O2 → Fe2O2 4Fe + 3O2 → 2Fe2O3

Which of these statements indicates an experiment is systematic? A. The experiment is repeated many times. B. The experiment is about a testable question. C. The experiment is very complicated and uses lots of chemicals. D.

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?