Part A What is the chemical formula for the base Nickel(II) hydroxide? Express your answer as a chemical formula. View Available Hint(s) nothing Part B The formula for the carbonate ion is CO32−. Predict the formula for carbonic acid. Express your answer as a chemical formula. View Available Hint(s) nothing Part C Match each acid formula to the name. Drag the appropriate items to their respective bins. View Available Hint(s) ResetHelp Nitric Nitrous Chloric Hydrochloric

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Explanation:

Part A

Nickel(II) hydroxide: in this compound, Nickel has oxidation state of 2+, and we can safely assume hydroxide ion OH- has -1 oxidation. Hence, our chemical formula would be:

Part B

Acids give off hydrogen ion as the only positively charged ions in solution. Since oxidation number of hydrogen is 1+, chemical formula of carbonic acid is :

Part C

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"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"