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Problem- For similar light intensity, compact flourescent bulbs use about 25% of the energy of incandesant bulbs. Lets say you replaced a bulb of 75 W with a flourescent bulb and that your utility charges $0.15/kW-hour. How many dollars would you save in electricity in the 10,000-hour lifetime of the bulb?
Please show me how work it out above problem
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 9.00 mL of a 0.290 M Hcl solution to the beaker. How much will the pH change. The pKa of acetic acid is 4.760.
Finding creative ways to generate energy in a clean manner is an significant area of debate. Define how we obtain energy from nuclear fuel and carbon sources. Which method do you prefer. Why
5 grams of water are evaporated converted to gaseous water vapor. is the mass of the water less than equal to or
The operations manager of a large production plant would like to estimate the mean amount of time a worker takes to assemble a new electronic component. Assume that the standard deviation of this assembly time is 3.6 minutes.
The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0x10^- 13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm.What fraction of the space within the atom is occupied by the nucleus?
What mass of Na2C2O4 was present initially?
To prepare a solution of 50% sulfuric acid, a dilute waste acid containing 28% h2SO4 is fortified with a purchased acid containing 96% H2SO4. How many kilograms of the purchased acid must be bought for each 100 kg of dilute acid
the preparation of the esters given in this reaction, the reaction product is extracted with 5% sodium bicarbonate solution (NaHCO3) in the isolation step
Calculate how many joules are needed to heat and calculate the theoretical volumes of 1.0 M Tris base?
Based on your intuitive knowledge of chemistry and physics, suggest WHY rubber is an elastomer @ room temperature but glass is not.
Explain which of the following will drive the equilibrium system to the right. The thermo chemical equation for the formation of ammonia from elemental nitrogen and hydrogen is as follows.
Show the orbital-filling diagram for rm N (nitrogen). Stack the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
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