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Problem- Using the same radioactive source, and placing the different materials listed below from the same distance, arranges the follow materials in descending order of penetration-
(a) Concrete (b) Plastic (c) Cardboard (d) Wood (e) Alcohol (f) Lead
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Compute the molality of a solution containing 327 g glucose(C6H12O6) dissolved in 1.52 L of water. (Assume a density of 1.00 g/mL for water.)
The decomposition of potassium chlorate (KClO3) is used as a source of oxygen in the laboratory. How much potassium chlorate is needed to produce 20.7 mol of oxygen?
Calculate the cost of 40 mL of sulfuric acid. given that Sulfuric acid (18 M) = $54.30/2.2 L
Which of the following signs on q and w represent ( work is done on the systemby gaining heat from the surrounding) ? a- q=+, w=- b- q=-, w=+ c- q= + ,w=+ d- q=- , w= -
Calculate molar concentration of a 4.50 l solution that contains 35.5 g of dissolved sodium hydrogen carbonate. Why should solute be added to water rather than water added to solute.
Question- hey I really need some help with it this one I am really struggling with it. I would really appreciate it if you would really explain each step thoroughly thank you so much. A sample of ammonia (NH3) has a mass of 56.6g. How many molecule..
Which of the following below applies to the addition of nucleophiles toalpha, beta-unsaturated carbonyl compounds
Predict the geometries of the following species using the VSEPR method- (a) PCl3, (b) CHCl3, (c) SiH4, (d) TeCl4.
a researcher is often required to prepare solutions in the lab. typically a lab provides a concentrated solution. this
When 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system
Determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%
How would this computed ? compare with the dimensions of a typical atom? (-1 if much smaller, 0 if about the same magnitude, +1 if much bigger)
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