Calculate the energy of combustion of a theoretical compound X if
it takes 5.69 grams of...
Calculate the energy of combustion of a theoretical compound X if
it takes 5.69 grams of that compound to turn 123.5 grams to liquid
of a 15.570 kilogtam piece of ice that started at -15 degree C.
Calculate the theoretical A/F ratio for the complete combustion
of propane (C3H8) on mole basis and mass basis. Also, calculate the
equivalence ratio for the following reaction:
C3H8 + 7O2 + 26.32N2 → 3CO2 + 4H2O + 2O2 + 26.32N2
Calculate the theoretical yield of aspirin a) in moles and b) in
grams. Assume use of 1.0 g salicylic acid and 2.5 mL acetic
anhydride. Show all calculations.
Calculate the theoretical density of the compound CaTiO3 (perowskite) which has a crystalline structure with a
elemental cell FCC: Atomic mass Ca 40.08 g / mol, atomic radius of Ca+2 0.099 nm; Atomic Mass Ti 47.88
g / mol, atomic radius of Ti 0.061 nm; Atomic mass O 16.00 g / mol, atomic radius of Ca-2 0.140 nm; (1 atom of
Ca / cell, vertices; 1 Ti atom / cell, central; 3 O atoms / cell, centered on faces)
Reasonable efficiency for converting chemical energy to
electrical energy via combustion is 30%. Calculate how many pounds
of coal must be burned to run your reading lamp for two hours of
studying for a chemistry exam. A typical reading lamP has a 75 W
bulb. Assume that coal is pure graphite. (1 W = 1 J/s.)
_______lbs
What is the theoretical yield of ammonia (in grams) if 17.15
grams of nitrogen gas and 10.95 grams of hydrogen gas are allowed
to react?Based on your theoretical yield, what is the percent yield
of ammonia if only 11.5 grams of ammonia is produced?
A compound contains 0.643 grams hydrogen and 3.857 grams of carbon.
a) Find its empirical formula.
b) Find its molecular formula if its molecular weight is 56.0 g/mol.
Calculate the total energy (in joules) needed to convert 15.0
grams of liquid ethanol at 25 0C to gas at 78 0C (boiling point).
The specific heat of ethanol is 2.46 J/g 0C and the heat of
vaporization is 841 J/g.
A combustion reaction of a hydrocarbon is defined as the
reaction of the compound into carbon dioxide and water.
CmHn(g) + (m+(1/4)n)O2(g) ---> mCO2 + (1/2)nH2O(l)
1. Demonstrate that this chemical reaction is balanced.
2a. From this definition, write down the chemical reaction for
the combustion of cyclopropane, C3H6(g).
2b. The enthalpy of reaction for the combustion of cyclopropane
(i.e., the reaction in 2a) is measured to be ΔH° rxn = −2091 kJ/mol
in the standard state at 25° C....