Isotopes percent abundance of antimony

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

How many grams of aluminum will there be in 98g of al2o3?

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm