Which statement correctly contrasts science and pseudoscience

One of the few xenon compounds that form is cesium xenon heptafluoride (csxef7). how many moles of csxef7 can be produced from the reaction of 13.0 mol cesium fluoride with 12.5 mol xenon hexafluoride? csf(s) + xef6(s) csxef7(s)

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

What is the molar mass of ca(cio4)2