Chemistry, General Chemistry Year 1 kinetics problem -------------------------------------------------------------------------------- The problem states In the reaction 2 A + 2 B -------arrow C + 3 D the rate of disappearance of A is -2.2 X 10^-4 M s -1. What is the rate of formation of C and the answer states is ...continues
Automobile fuel economy in the US. Calculate fuel consumption savings
Petroleum consumption in the US in 1990 supplied about 35.9E15 kJ of energy. Of this quantity, about 15.3E15 kJ was supplied by foreign sources. The transportation sector is the major user of petroleum, accounting for 23.2E15 kJ of consumption. Overall automobile fuel economy in the US was about 20 miles per gallon in 1990. Auto ...continues
Calculating energy and cost for solar heater
The average home has a 200 liter (50-60 gallon) hot-water tank, which is effectively drained and replenished three times per day. Assume that the entering tap water is 16 degrees C and is heated to 56 degrees C. Given an average energy from sunlight of 1.53 kJ/cm^2 per day, how large would the collection area (in m^2) of a solar ...continues
Conversions of oxygen radicals from ppmv
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius. Convert this value to: a. partial pressure in atm b. the molarity scale c. the molecules per cm-3 scale
Volume of sulfuric acid produced from coal
One metric ton (1000 kg) of coal is required to produce 7.3 MW-hr of electrical energy. In 1993, the Thomas Hill power plant (a small, coal-fired plant supplying rural electric cooperatives) produced 5900000.0 MW-hr. If low sulfur (1%) coal were used, and the gaseous effluent were the only means of discharging the sulfur, what v ...continues
Stokes' Law describing partial sedimentation is given by: Rate = [(gd^2)(Δρ)]/18η where g = 9.81 m s^-2 is gravitational acceleration. Δρ is the density difference between particles and the air, air viscosity of η = 1.67E-4 g cm^-1 s^-1 and d is the particle diameter in centimeters. a. Calcula ...continues
How Much Energy is Needed to Heat [Amount] of Water by [Amount] of Degrees (and what is the cost)?
The average home has a 200 liter (50-60 gallon) hot-water tank, which is effectively drained and replenished three times per day. Assume that the entering tap water is 10 degrees C and is heated to 57 degrees C. Given an average energy from sunlight of 1.53 kJ/cm2 per day, how large would the collection area (in m2) of a sol ...continues
Petroleum consumption in the US in 1990 supplied about 35.6E15 kJ of energy. Of this quantity, about 14.4E15 kJ was supplied by foreign sources. The transportation sector is the major user of petroleum, accounting for 23.2E15 kJ of consumption. Overall automobile fuel economy in the US was about 21 miles per gallon in 1990. Auto ...continues
Petroleum consumption in the US in 1990 supplied about 35.6E15 kJ of energy. Of this quantity, about 14.4E15 kJ was supplied by foreign sources. The transportation sector is the major user of petroleum, accounting for 23.2E15 kJ of consumption. Overall automobile fuel economy in the US was about 21 miles per gallon in 1990. ...continues
47. a) Photosynthesis is estimated to produce 390.0 g (dry weight) of plant matter per square meter, 50% of which is carbon. Calculate the total number of grams of carbon "fixed" each year by 1000 square meters. b) The photosynthetic reaction can be represented as: 6CO2 + 6H2O -> C6H12O6 + 6O2 Of the glucose produced, 40.0% ...continues
