A, C-1-1-1-1 B.
1:
1
::
c. 1-1-7-1-
D. I-i-
:
1
What is the Lewis structure for carbon tetraiodide, which contains
one carbon atom and four iodine atoms?
Select one:
a. A
b. B
Oc. c
d. D

"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"

where are the choice options?

a electronegativity decreases beacuse the size of nucleus is bigger.