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A balloon is filled with He gas to a volume of 3.22 L at 32oC. The balloon is placed in liquid nitrogen until its temperature reaches -132oC. Assuming the pressure remains constant, what is the volume of the cooled balloon?
calorimetry is used to find ?h for the reaction ba2aq so42-aq rarr baso4s. when 1.00 l of 1.00 m bano32 is mixed with
During the synthesis of methyl 3-nitrobenzoate, when the reaction mixture is poured on ice, the product separates out as a solid. Why
Breathalyzers determine the alcohol content in a person's breath by the following (unbalanced) redox reaction:
Element X has two natural isotopes: X-6 (6.015 amu) and X-7 (7.016 amu). Calculate the atomic mass of the element X given the abundance of X-7 is 92.5%
When 10.0 g of calcium carbonate was mixed with 150.0 ml of 1.00 M hydrochloric acid, a gas formed. What is the theoretical yield,in liters, of the gas measured at 300 torr of pressure and a temperature of 27.0 degre celcius?
A soft drink contains 44 mg of sodium in 325 g of {rm H_2O}. What is the concentration of sodium in the soft drink in mass percent?
Write two equations to show the reaction of 4-Methylcyclohexene with (a)Br2/CH2Cl2 (b)KmnO4
what is the purpose of placing a lead apron on a person who is receiving routine dental X-rays? d)why are the walls in a radiation lab built of thick concrete blocks
what is the ph at the half-stoichiometric point half-way to the endpoint for the titration of 0.22 m hno2aq with 0.10 m
calculate the pKa value of the acid and determine the number of moles of acid initially present.b) when the reaction is complete, what is the concentration ratio of conjugate base to acid?
Assign an oxidation state to each atom in each polyatomic ion. Express answers as a signed integer. 1. CrO4^2- 2. Cr2O7^2- 3. PO4^3- 4. MnO4^-
Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water. Kf = 1.86°C/m and Kb = 0.512°C/m. Use 100°C as the boiling point of water.
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