How many aluminum atoms are in 3.86 g of aluminum?

What forms when chemical reactions combine pollution with sunlight?

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

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)