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1. How many trees are required to offset the carbon dioxide emissions from an individual who drives 15000 miles every year at a fuel efficiency of 30mpg? Average tree removes 610 kg of CO2 every year, formula for gas is C8H18 with density of .73 mL Only products of combustion are CO2 and H2O.
2. New carpet is installed in the bedroom of a house is 15 feet by 12 feet by 10 feet. if the carpet emits formaldehyde gas at a rate of 4.3 x 10-6 mol/hour. How many hours will it take to exceed .10 ppm by volume?
3. How many kg of water must be processed to obtain 1.1 L of D2 at 25 degrees and .900 atm. D2 abundance is .015 and recovery is 80%
4. A 375 gallon tank is filled with water containing 168 g of bromine to form Br- ions. how many liters of CL2 gas at 1 atm and 20 degrees C will be rwquired to oxidize all the bromide to molecular bromine?
Another student was in a hurry and stopped heating, even though bubbles were still emerging from the rubber tubing. 3.) A student used the measure of Flask no.1 to be 250mL, without measuring the volume as directed
Which of the following is the strongest oxidizing agent and which one is the weakest in acidic solution: Br2, H2O2, Zn, Cr2O7^2-
A sample of carbon monoxide, CO, occupies a volume of 350. mL and exerts a pressure of 1020. torr at 25°C. If the volume expands to 500. mL with no temperature change, what pressure will the gas exert
given that the density of a given solid and liquid of molar mass 147.2 gmolnbsp 992.6 kg m-3 and 933.4 kg m-3 . at its
a gasous mixture of oxygen and nitrogen contains 32.8% nitrogen by mass. what is the partial pressure of oxygen in the mixture if the total pressure is 405mmHG?
How much heat is required to vaporize 18.5g of water at 100c. The heat of vaporization of water at 100c is 40.7kj/mole.
A compound contains 43.64% P with the remainder being oxygen. What is the empirical formula of the compound?
calculate the concentrations of h+, oh-, f-, and undissociated hf molecules in 0.10 M hf. Ka for HF is 7.1x10^(-4).
A silver electrode of the first kind was used to measure the Ag+ ion concentration in solution. When the [Ag+] is 1.44 x 10-3 the Ecell is determined to be 0.626. Calculate the temperature (oC) using the Nernst equation.
a monoprotic acid with a solution of sodium hydroxide of known concentration, what quantities are equal at the equivalence point
a gas company in massachusetts charges $2.80 for 15ft^3 of natural gas at 20 degrees C and 1 atm. Calculate the cost of heating 200mL of water from 20 degrees C to 100 degrees C.
A 326 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 640. mmHg. Calculate the moles of Ar present.
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