990
40
990
m 1 =
040
050
0 130

erbk5tnfyhunum7569580e5ru47jn895k4r4r654-+5+544+rg+454++445454=r++33432

Explanation:

50

Explanation:

a triangle adds up to 180 ° and 90 is given and we know the bottom angle is 40 because it is the same as the other 40 which also only leaves 50 to M1 because 90+40=130

180-130=50

*tilts head* sounds more like a statement

"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"