CER: A chemist analyzed four different substances and obtained the given data below. Three of the four substances are known For the unknown substance , determine whether it utilizes ionic or covalent bonds. Us evidence from the given data to support your claim Explain your reasoning by referring to common properties of ionic compounds

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

"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"