Two molecules of Chlorine (Cl2) and one molecule of Magnesium Sulfide (MgS) combine in a reaction. How many atoms should be in the products?

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?