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To facilitate traffic flow, many stoplights now have a sensing system based on inductance to determine if a car is waiting at a red light. If that is the case, the light is then switched to green.
Using the Internet, write a paragraph explaining how the system works.
The magnesium and calcium ions present in seawater([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH.
carboxylic acids react with alcohols to form esters which are found in all plants and animals. what is the percent by mass of carbon in each of the following esters?
Evaluate the opportunities for the development of research using biogenetic therapeutic cancer data and apply its implications for action research regarding the non-Hodgkin's Lymphoma form of cancer.
The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100 mL. What volume of 0.00300 M HCL is needed to neutralize 14.0 mL of saturated Ca(OH)2 solution
How many moles of water, H2O, are present in 75.0g H20? A. 4.17 moles B. 4.41 moles C. 75.0 moles D. 1.35 x 10^3 moles C 7.50 moles
Estimate the magnitude of the absoulte error and percent error in the measured sample volumes. Compare those errors to the errors that occur when measuring volumes of approximately 8mL
how many grams of precipitate are formed if 0.27 grams of barium nitrate is mixed with 0.2 l of 0.8 m potassium
The total volume of seawater is 1.5X10^21 L. Assume that seawater contains 3.1 percent sodium chloride by mass that its density 1s 1.03 g/mL. Calculate the total mass of sodium chloride.
2 liquids, A and B, have the same molecular weight. Samples of each are placed on temperature probes and allowed to evaporate. After a period of time Liquid A had a change in temp
What volume of each of the following acids will react completely with 50.31 mL of 0.146 M NaOH?
Lactic acid has a pka of 3.86. If the concentration of lactate is 0.42 M and the concentration of lactic acid is 2.25 M what is the pH of the solution
Calculate the reflection loss when a beam of radiant energy passes through an empty quartz cell assuming the refractive index of quartz is 1.55.
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