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A crucible is known to weigh 24.3162 g. Three students in the class determine the weight of the crucible by repeated weighings on a simple balance. (A) Using the following information, which student has done the most accurate determination? (B) Which student has done the more precise determination?
Student Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
A 24.8 24.0 24.2 24.1 24.3
B 24.5 24.3 24.5 24.4 24.3
C 24.8 24.9 24.8 24.9 24.8
10. A solid block of titanium that is 2.1 cm x 1.21 cm x 6.5 mm has a mass of 7.515 grams.
What is the density in g/cm3?
The equivalence point is reached after addition of 25.0 ml Naoh a) calculate the ionication ka for the acid HA
what volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?
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What is the density of lead (in ) if a rectangular bar measuring 0.500 in height, 1.55 in width, and 25.00 in length has a mass of 220.9 ?
An enzyme-catalyzed reaction produces a product that has a maximum absorbance at 412 nm. The extinction coefficient is 4000 M^-1 cm^-1. A 10-to-1 dilution of the enzyme is made and 20 microliter of the dilution are put into a cuvette with 80 micro..
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100g (water) that increases temperature from -100 degrees Celsius to 200 degrees Celsius. How much energy in a Kilo Joule is absorbed?
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
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Propose a method to accurately measure the melting point of vegetable oil both before and after hydrogenation. Keep in mind that it will be too thick and greasy to insert in a capillary tube
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