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

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Find the number of moles of argon in 364g of argon.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.