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About 30% of crude oil is processed eventually into automobile gasoline. As petroleum prices rise and resources dwindle, alternatives must be found. However, automobile engines can be tuned so that they will run on simple alcohols. Methanol, and ethanol can be derived from coal or plant biomass, respectively. While the alcohols produce fewer pollutants than gasoline, they also reduce the travel radius of a tank of fuel. What percent increase in the size of fuel tank is needed to give an equivalent travel radius if gasoline is replaced by alcohol? Base your calculations on 40 kilojoules per gram of gasoline having a specific gravity of 0.84, and the product water as a gas. Make the calculations for (a) methanol; (b) ethanol.
Aluminum metal shaving (10g) was placed in 100mL of 6.00M hydrochloric acid. What is the mass of hydrogen gas that can be produced. 2Al (s) + 6HCl (aq) -----> 2AlCl3 + 3H2 (g)
Calculate the equilibrium constant kc for a reaction occuring at a temp 0f -19 degree C and when delta G of 1.6 KJ/mol(use R =8.314 J/mol and 273 for kelvin conversion)
Give the theoretical yield, in moles, of CO2 from the reaction of 4.00 moles of C8H18 with 4.00 moles of O2. 2 C8H18 + 25 O2 ? 16 CO2 + 18 H2O
if the vapor of a volatile liquid of 2.31grams nbspis able to fill a flask of 498-ml at 100 degree celsius and 775 mm
a reaction mixture initially contains a br2 partial pressure of 755 torr and a cl2 partial pressure of 725 torr at 150
The frequency of vibration in a quartz watch is 33 kHz. What is the energy required to excite this vibration? Also compute omega for this vibration.
The density of liquid octane, C8H18, is 0.7025 g/ml. If 1.00 mL of liquid octane is vaporized at 100 degrees Celsius and 725 torr, what volume does the vapor occupy?
What information does a chemist obtain from the mass spectrum of a compound?
How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion? Calculate the molarity of the solution.
What is the balanced chemical reactions that takes place when h2o2, concentrated h2so4, and Cu(s) is placed in solution. One of the byproducts should be copper sulfate (CuSO4) and there is some gas evolution during the reaction.
A quantity of 18.68 ml of a KOH solution is needed to neutralize 0.4218g of a KHP what is the concentration of the KOH solution
The half life of mercury-197, used for kidney scans, is 64.1 hours. If a patient undergoing such a scan is given 5.0 ng of mercury-197, how much will remain after 7 days? After 14 days? After 21 days
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