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Honda developed a car that utilize a hydrogen fuel cell to power the car instead of gasoline. The estimated mileage for this fuel cell is 72 mi/kg. How many L of hydrogen are needed to drive to the Grand Canyon, 789 miles away?. The density of hydrogen is 8.99x10 to the negative 5 g/cm cube.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4.
a 45 kg person drinks 390. g of milk which has a caloric value of approximately 3.0 kjg. if only 18 of the energy in
Consider a 2710-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). If the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car? in mph
What is the final concentration (in M) of 18.5 mL sodium chloride solution with an initial concentration of 1.78 M which is diluted with 15 mL of solvent? Assume the volumes are additive.
Compare the pH of an H2CO3 buffer (the first buffer) that contains 0.10 M H2CO3 and 0.10 M NaHCO3 with another H2CO3 buffer (the second buffer) that contains 0.15 M H2CO3 and 0.050. M NaCO3 Carbonic acid has a Ka of 4.3X 10^-7
At pH 12, magnesium hydroxide is insoluble and does not react with EDTA. The titration of a hard water sample at pH 12 thus yields results for calcium only. A 250.0-mL sample of tap water was adjusted to pH 12 and titrated with 0.01056 EDTA using ..
The compound trichlorosilane (SiCl3H) has a vapor pressure of 0.258 atm at -2 degrees celsius. What is the normal boiling point ( the molar heat of vaporization of Trichlorosilane is 28.8 kj/mol)
There are about 1,200,000 autos .each auto emits 3.1g NO2 and 1.6g CH4 per vehicle mile. Each auto travels 30 miles round trip per day. How much NO2 and CH4 in g/day is emmited in the air daily?
A mixture of 1.07 g H2 and 1.50 g He is placed in a 1.00-L container at 30.°C. Calculate the partial pressure of each gas and the total pressure.
One synthetic preparation of aniline involves reducing nitro benzene with iron and HCL, and then steam distilling the resultant aniline at 99 degrees Celsius. How much aniline codistills with each gram of water during the steam distillation.
if a 1500 rm kg car can accelerate from 30 kmh to 50 kmh in 3.1 s how long will it take to accelerate from 50 kmh to 75
A 782 mL gas sample at STP is compressed to a volume of 131 mL, and the temperature is increased to 22?C. What is the new pressure of the gas in Pa?Answer in units of Pa.
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