Chemistry word Problem

The Apparatus shown below consists of 3 temperature-jacketed 1.000 L bulbs connected by stopcocks.Bulb A conatains a mixture of H2O(g),CO2(g),and N2(g) at 25 degees C and a total pressure of 564 mmHg.Bulb B is empty and is held at a temp of -70 degrees C.Bulb C is also empty and is held at a temp of -196 degrees C.You may neglect the volume of the lines connecting the Bulbs. A)The Stopcock between A and B is opened,and the system is allowed to come to equilibrium.The pressure in A and B is now 219 mmHg.What do bulbs A and B each contain? B)How many moles of H2O are in the system? C)Both stopcocks are opened,and the system is again allowed to come to equilibrium.The pressure throughout... click for more

Chemistry word problem

10.1 g CaO is dropped into a styrofoam coffee cup containing 157 g H2O at 18.0 degrees C.If the following reaction occurs,then what temp will the water reach,assuming the cup is a perfect insulator and the cup absorbs only a negligible amount of heat? CaO(s) + H2O(l) yields Ca(OH)2(s) delta H rxn= -64.8 kJ/mol

Chemitry word problem

The surface temperature of Venus is about 1050K and the pressure is about 75 Earth atmospheres.Assuming that these conditions represent a Venerian "STP",what is the standard molar volume (in liters)of a gas on Venus?(Extra Credit: "Venusian",while commonj,is incorrect.Give another adjective,beginning with the letter C,that refers to things Venerian.)

Isooctane problem: balanced combustion equation, standard volume, heat of combustion

Isooctane, C8H18, is the component of gasoline from which the term octane derives. A) Write a balanced equation for the combustion of one mole of isooctane to yield CO2(g) and H2O(l). B) What is the volume (in liters) of CO2 at STP? C )The standard molar heat of combustion (delta Hrxn for the reaction is -5,456.6 kJ/mol. Calculate delta Hf for isooctane.

Mole Concept, molecules in a drop of water

How many molecules are contained in one drop (0.050 mL) of water (density 1.0 g/mL)?