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Consider the combustion of propane gas, C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(l) Ho = -2,220 kJ/mol Propane (just C3H8) is often used for gas grills. Anyone who has every filled or moved those tanks knows they can get pretty heavy. a) How many grams of propane are in 14 pounds of propane? Use the conversion 1 lb = 454 g. (Express your answers for the next three questions in scientific notation. For example use 2.3e-5 to indicate a number such as 2.3 x 10-5.) grams b) How many moles of propane are in 14 pounds of propane? moles c)How much heat can be obtained by burning 14 pounds of propane? (Remember to look at this from the viewpoint of the surroundings, since the question asks how much heat can be OBTAINED.) kJ What is the enthalpy change for 9 CO2(g) + 12 H2O(l) 3 C3H8(g) + 15 O2(g) (Hint: compare this equation to the combustion equation for propane. kJ
Write a formula for the conjugate base formed when each of the following behaves as a bronzed acid.
what will be the concentration of dichlobenil in the pond? The following conversion factors will be helpful: 1 acre=43,560ft2 1ft=12in 1in=2.54cm 1cm3=1mL 1ft3=28,317cm3
Explain how you arrived at this conclusions. Write a balance chemical equation for the reaction that occurs when sodium cyanide dissolves in water.
Detremine the concentration of chromate solution - Potassium chromate has an absorbance value
calculate the mass of a sample of gold that occupies 5.0 X 10^-3 cm3 if the density of gold is 19.3 g/cm
Determine how many grams of C 6 H 12 O 6 should be mixed in 563 grams of C 2 H 5 OH) to form a 2.40X10^-2 m solution?
When 0.228 g of the hydrate ZnSO4•xH2O is heated, 0.128 grams of anhydrous ZnSO4 remains. What is the value of x in the formula for the hydrate?
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.
Assuming that the water is contaminated, devise a method for disposing of the contaminated water without contaminating the environment, but allowing the recycling plant to resume operations as soon as possible.
A 4.5 g nugget of gold absorbed 276 j of heat. What was the final temperature of the gold if the initial temperature was 25 OC ? The specific heat of gold is 0.129 j/g OC.
Give the balanced thermochemical equation for the following reactions. show the correct physical state in each equation.
A 0.100 M solution of a weak acid, HX, has a pH of 2.110. What is the value of Ka for HX?
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