Final answer:
The formula for Calcium Citrate is Ca3(C6H5O7)2. It is an ionic compound where three Ca2+ ions balance the charge of two C6H5O7- ions. Calcium carbonate is a compound with a ratio of 1:1:3 for Ca:C:O atoms.
Step-by-step explanation:
The formula for Calcium Citrate is b) Ca3(C6H5O7)2. This is because in calcium citrate, three calcium ions, each with a charge of +2, are needed to balance the charge of two citrate ions, each with a charge of -3. Therefore, the correct formula must have a ratio of 3 calcium ions to 2 citrate ions.
1. Calcium carbonate, with the formula CaCO3, is a compound because it is made up of different elements chemically combined in a fixed ratio. The ratio of Ca : C : O atoms in calcium carbonate is 1:1:3 respectively.
2. Examples of correctly written formulas for ionic compounds include Calcium bromide (CaBr2), Aluminum oxide (Al2O3), and Carbon tetrachloride (CCl4).