What is the pressure of 4 moles of helium in a 50 L tank at 308 K? Use PV = nRT.
A. 2.02 atm
B. 0.13 atm
C. 24.64 atm
D. 0.51 atm

How many moles of oxygen react with 12 moles of aluminum

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals