29 mols of na2So4 is how many grams

Explanation:

4118.2

Explanation:

Given: 29 moles of na²

To find: In grams.

Solution: Wrong

If 1 na² is 142 grams, then 29 grams will be found if a set of fraction has been set up;

Let be the variable

Cross multiply

Correct Solution

Multiply 29 by 142 = 4118

"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"

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