< Back to Content 4.02 Quiz: Origin of the Universe
QUIZ:
Origin of the Universe
If the universe was contracting, what would happen to light from other galaxies as it reached Earth?
It would be blue shifted.
It would be dimmer
It would be brighter
O
It would be red shifted.

i believe it is a.) released into

explanation:

"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"

the answer for sodium is 0.186

the answer for rubidium is 0.251

girl imma just put my comment here because i need a couple point okurrttt