Aphysical property of halite (table salt) is its a. acidity b. basicity c. high melting point d. chemical composition

C. high melting point

Explanation:

Physical property is defined as the property of a substance which becomes evident during physical changes. Example: melting point

Chemical property is defined as the property of a substance which becomes evident during chemical changes. Example: Reactivity with other substances , acidity, basicity , chemical composition

Acidity is the number of ions a substance releases on dissolving in water.

Basicity is the number of ions a substance releases on dissolving in water.

Thus high melting point is the physical property of halite.

"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"