A ball is on a shelf 6.5 feet from the floor. The ball is bumped and rolls off the shelf, what is the velocity of the ball just before it hits the floor? the ball has a mass of 0.56 pounds. the height of the ball is m

the mass of the ball is Kg

The gravitational potential energy is J

the kinetic energy is J

the velocity of the ball is m/s

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

answerto predict;

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