(03.02 lc) lithium has a 1+ charge, and oxygen has a 2− charge. a lewis dot diagram should contain one lithium atom and two oxygen atoms to show how these atoms form an ionic bond. true false

false,

the lewis dot structure of lithium oxide will not include only one lithium atom and two oxygen atom,

it will include 2 lithium atom and one oxygen atom so that an ionic compound is formed.

lithium contains +1 positive charge and oxygen contains -2 negative charge so as to make an ionic bond, two lithium should give its 2 electrons to 1 atom of oxygen.

2[Li]⁺ [O]⁻²

"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"