Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g)

How many grams of F2 are needed to produce 199 g of PF3 if the reaction has a 73.4% yield?
I got 78.04888 and it says it wrong even tho i did sigfig and all

Drug abuse will not lead to physical and psychological dependence. true or false ?

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2:

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.