When copper (ii) sulfate pentahydrate (cuso4•5h2o) is heated, the water is driven off, leaving behind solid copper (ii) sulfate (cuso4) according to the equation below: cuso4•5h2o → cuso4 + 5h2o describe how a chemist should set up his or her stoichiometric calculation to predict the mass of cuso4 that forms when a specified mass of cuso4•5h2o is heated.

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)