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How many grams of manganese (III) oxide (157.87 g/mol) can be produced from the reaction of 13.00 g of MnO2 (86.94 g/mol) with 11.00 grams of zinc (65.38 g/mol) according to the following balanced reaction? 2 MnO2(s) + Zn(s)  →  Mn2O3 + ZnO (aq)

What are the units of molar concentration, M?  

10.0 g of hydrogen gas (2.016 g/mol) is reacted with excess oxygen gas to produce water vapor (18.0 g/mol) at 0.982 atm and 300.15 K. What volume of water vapor in L will be produced by this reaction?  2H2(g) + O2(g) –> 2H2O(g) Do not include units in your answer, just the number in L.

How many sigma and pi bonds are in the molecule below? Hint: some of the bonds may be hidden! [sigma] number of sigma bonds [pi] number of pi bonds

A balloon is filled with 3.00L of helium at a pressure of 765 torr. What is the volume of the balloon at an altitude where the pressure is 530 torr if the temperature remains constant?

Which of the following statements regarding how gases occupy container volumes is NOT correct?

How many chlorine atoms are there in 16.0 g of carbon tetrachloride (CCl4, 153.82 g/mol)?

Which of the following statements regarding the kinetic molecular theory of gases is NOT correct?

Which of the following is most soluble in water?

NH3 forms a strong electrolyte in an aqueous solution.