How many milliliters of calcium, with a density of 1.55 g/mL, are needed to produce 85.8 grams of calcium fluoride in the single replacement reaction below? Show all steps of your calculation as well as the final answer.

Unbalanced equation: Ca + HF yields CaF2 + H2

I don't know, but there are many. I prefer Ca + HF. CaF2 + H2. CaF0 + H0 is better. I don't know. I like free choice. It is not a true answer if you want to know the truth. It is just provoking g-e-r-d symptoms. I miss him. Remember to tell him that I like him and no matter if he's got whatever girlfriends I still like him. He's sweet.