Which number in this diagram represents the process of water vapor becoming liquid.

1

2

3

4

Option (c) is the correct answer.

Explanation:

The diagram represents water cycle. Step 1 shows liquid water from the sea evaporates into the atmosphere in step 2.

Then step 3 shows that water in the form of vapor again changes into liquid state and reaches back into the sea in step 4.

Hence, we can conclude that number 3 in this diagram represents the process of water vapor becoming liquid.

"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"