Complete and balance the equation for this single-displacement reaction. phases are optional. li+naoh-->

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

The balanced chemical equation is :

This is a single replacement reaction in which lithium replaces sodium from its aqueous solution. As lithium is more reactive than sodium, it easily loses electrons to convert to in and in accepts electrons to form .

"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"

i think   the answer is c hope i'm right