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An effective treatment for some cancerous tumors involve irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.2 x 10^7 m/s. If the velocities of the individual neutrons are known to within 2% of this value, what is the uncertainty in this position of one of them?
the products formed are sodium bromide and hydrogen sulphite. Calculate the mass of sodium bromide produced.
What are some of the differences between water obtained from a river that flows past farmland and water obtained five miles
A 25.0 mL sample of a solution of the weak base aniline, C6H5NH2, requires 25.67 mL of 0.175 M HCl to reach the equivalence point. (Kb for aniline = 4.0 x 10-10)
A student was asked to determine the strength of the acetic acid in a vinegar solution. For 25.00 mL of vinegar he used 32.05 mL of a 0.4235M solution of sodium hydroxide to neutralize using phenolphthalein as indicator. What was the concentration..
A buffer (pH 3.70) was prepared by mixing 1.00 mole of formic acid and 1.00 mole of sodium formate to form an aqueous solution with a total volume of 1.00 L.
proportional only to the numbers of hydrogens that give each product when substituted for by chlorine. What would be the relative yield of each product?
Write the half-reactions for the silver-silver chloride and calomel reference electrodes.
How to Name and Define Acids, How can you know that HNO3 is nitric acid and HNO2 is nitrous acid? How do you know the difference in endings?
A balloon has a volume of 1.20 at 24.0 degrees Celsius. the balloon is heated to 48.0 degrees Celsius. calculate the new volume of the balloon.
If 4.00 mL of vinegar needs 41.5 mL of 0.150 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.80 qt sample of this vinegar?
What is the entropy change for the reaction 2H(g) + O2(g)-------- 2H2O(l) at 25 degree and 300 atm
Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 275mL of coffee from 25.0 ?C to 62.0 ?C?
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