Answer:
5.84 M
Explanation:
First you have to convert grams of Ca(OH)2 to moles,
since molar mass is 74.093 g/mol, we divide the amount you have by the molar mass: (86.5 g)/(74.093 g/mol)= 1.1675 moles of Ca(OH)2
Then, knowing molarity is (moles/ volume in liters), we have to convert 200 mL to liters, which is 0.200 L
Putting it together, molarity = (1.1675/0.200) M= 5.84 M
