3. A 0.821-mol sample of a substance composed of diatomic molecules (of the same atom) has a

mass of 131.3 g. Identify this molecule.

What mass in kilograms does 4.41 moles of copper have?

Write equations for the initiation and propagation steps for the formation of dichloromethane by free radical

One isotope of oxygen has 8 protons and 10 neutrons. Which is the correct reference for this isotope? A. oxygen-18 B. oxygen-2 C. oxygen-8 D. oxygen-10

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? The molar mass of the compound is 156.12 g/mol

Which change will decrease the number of effective collisions during a chemical reaction? A. adding a catalyst B. increasing the surface area C. decreasing the temperature D. increasing the reactant concentrations E.

The requirements for one type of atom to substitute for another in a solid solution are:

How could you separate items that are different densities? explain

Why do elements within a period of the periodic table have different properties

A professional technician maintains and operates specialized scientific equipment. True False

What is the distance from the highest part of one wave to the highest part of the next wave.