Which is not a true statement about the evidence to support the origin of our universe?A. Galaxies are expanding at an exponential rate in the universeB. The universe is continually heating up and gaining energyC. Leftover light from the oldest light in the universe is observableD. Hydrogen makes up about 73%, and helium makes up about 25% of all the mass in the universe

"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"

c.

explanation:

i would say b

explanation:

but i think i would need more information than that