If the heat produced by the reaction of combustion of 1 mole of ethanol is 8 kJ/mol, (see the thermochemical equation below), how much heat in kJ is produced by the combustion of 155 g of ethanol at the same conditions (MMethanol= 46.07 g/mol)? C2H6O(g) + 3O2(g)  → 2CO2(g) + 3H2O(g);       ∆H°rxn=−1366.8 kJ/mol  

120.0g  of helium occupies a 15.25 L cylinder which is heated until the pressure is 150 atm. What is the temperature (in oC) of the gas?

Consider the following balanced reaction: Pb(s) + 2 Cl2(g)  → PbCl4(s) Starting with 30.0g of Cl2 (MMCl2= 70.90 g/mol) and excess Pb, determine the theoretical yield of PbCl4(MMPbCl4= 349.01 g/mol).

What is the percent by mass of oxygen in (NH4)2SO3?

Which is the correct coefficient for O2 in the following equation after balancing?       _C4H10  +  _O2  →  _CO2 + _H2O

Use the Lewis dot structure (make sure you show all electron pairs) to predict the electronic geometry (EG) and the shape of the molecule H2O?

Convert 1.35 atm to mm Hg.   

An important cultural change from Paleolithic to Neolithic is

An _____ reaction results when the energy required to break bonds in the reactants is greater than the energy released by the formation of products.

Use the Lewis dot structure (make sure you show all electron pairs) and VSEPR theory to predict which of the following molecules is polar