A spherical ball of lead has a diameter of 2.5 cm. What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The volume of a sphere is (43) πr3 where r is the radius.)

What does the sign represent with respect to electrons

A double covalent bond involves two atoms sharing two electrons? True or false

Which arrow best dedcribes the process that arrow one represents

Calculate the mass of 12.044*10^23atom of carbon

The big bang theory suggests that our universe formed approximately years ago.

A 1.50-g sample of hydrated copper (II) sulfate was heated carefully until it had changed completely to anhydrous copper (II) sulfate () with a mass of 0.957 g. Determine the value of x.

The reaction rate between reactants Z and Y is proportional to the cube of [Z]. What is the rate law for this reaction?

A metal surface becomes dull because of continued abrasion. chemical or physical

What types of tissues build the digestive system?

Chemical bonds? A.) Combine compounds to form elements B.) Hold atoms together to form compounds C.) Are always covalent D.) Are always ionic