How many grams of phosphorus are represented by 2.34 x 10^23 phosphorus trichloride molecules? (answer is 12.0 grams, i don't understand how to do it)

Iknow #2 is d. i just need to know why

How does the motion of particles in a gas change as the gas cools

Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)