What is the volume of 0.255 mole of helium with a pressure of 74.8 atm at 280. K. (R= 0.0821 L ∙ atm / mol ∙ K) A) 0.155 L B) 0.784 L C) 0.0842 L D) none of the above

The formula of lithium oxide is Li2O.  The formula of Ruthenium(IV) bromide is RuBr4.  What is the formula of the compound formed if the Ruthenium and oxide from the above combine?      (a)  Ru2O                   (b)  RuO                 (c)  RuO4                  (d)  Ru2O4                   (e)  RuO2

Which of the following pair of molecules below can have hydrogen bonding? (a)  HBr  + H2O                 (b)  HF + HBr                  (c) NH3  + HF                   (d)  H2O  + CH4               

How many molecules of acetone in 11.0 moles of C3H6O?  

Mixing a solution of BaCl2 with a solution of K3PO4 will result in the formation of        (a)  solid           (b)  water       (c)  gas     (d)  no reaction occurs.

Which of the following statements is incorrect (wrong)?

According to the lecture, which of the following is part of Kinetic Molecular Theory for gases? Gas particles are close to one another. Gas particles do not attract one another. The average energy of the particles depends on the volume. Pressure results from collisions of gas molecules with other gas molecules All of the statements are not part of Kinetic Molecular Theory.

Which gas law involved moles of the gas?

Which of the following formulas (Lewis structures) has a total of  7 bonding pair of electrons ( 14 electrons) and 3 non-bonding pair of electrons (6 electrons)? NH2OBr HCl (Hydrochloric acid) C2H5F CHBr3

A gas temperature is changed from 456oC to 303oC.  If the initial volume is 235 mL at constant pressure, what is the final volume?