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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 observed melting point of camphor is often low. Look up the molal freezing point depression constant K for camphor and calculate the expected depression of the melting point of a quantity
The specific heat of a certain type of cooking oil is 1.75 J/(g·°C). How much heat energy is needed to raise the temperature of 2.69 kg of this oil from 23 °C to 191 °C
Calculate the experimental percent by mass of copper in the sample and the theoretical mass percent of copper in copper (II) acetate monohydrate.
A student placed 18.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100
Define why the steric influence of the methoxy group on the substitution pattern of anisole is so different from the steric influence of the N-acetyl group on the substitution pattern of acetanilide
A 0.150-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant of Co(NH3)62 is 5.0× 1031.
Use this information to compare how long it will take to obtain molecular scale mixing of such a gas over i) distance 1*10^-4 m and ii) 10m
Problem- The maximum rate at which 0.05? M carbonic anhydrase can break down sodium bicarbonate is 20 mMs-1. Carbonic anhydrase has a km of 26 mM. How fast can 0.05? M carbonic anhydrase break down sodium bicarbonate if [HCO3-] = 20 mM
During the compression, a heat transfer of 1.6 Btu occurs from the nitrogen to its surroundings. Assuming ideal gas behavior, determine A.) the mass, in lb of the nitrogen B.)the work in Btu.
Vigorous oxidation of P with hot acidic KMnO4 produce merely two compounds, with a ratio of 2 moles of "R" (C3H6O to 1 mole of "S" (C5H8O4). Compound S was as well optically active. Assume possible structures for P,Q,R and S. Define the reasons for..
This diluted sample is placed in a variable pathlength cell. The absorbance of the reference and the sample solutions match when the pathlength is 2.55 cm. 1) What is the concentration of iron in the well water. For each solution the zero is set wi..
what is percentage of 12.0 g quantity of methane was used and collected 22.0 g of carbon
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