Calculate the difference in pressure between the top and the bottom of a container exactly 84 cm deep filled at 27 ℃ with: Water (d = 0.990 g/cm3 )
Copper (d = 13.6 g/cm3 )

"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"

explanation: no but i do not usually comment

i just learnt this recently but i need to look through my notes again

answer; talc and gypsum;