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The chlorofluorocarbon CCl2F2 was once used as a refrigerant. What mass of this substance must evaporate to freeze 2 mol water initially at 20°C? (ΔHvap for CCl2F2 is 289 J/g; ΔHfus for solid ice is 6.02 kJ/mol; specific heat capacity for liquid water is 4.184 J/g•°C)
A chemistry graduate student is designing a pressure vessel for an experiment. The vessel will contain gases at pressures up to 210.0 MPa.
To identify a diatomic gas (x2), a researcher carried out the following experiment: She weighed an empty 4.8- bulb, then filled it with the gas at 1.40atm and 20.0 degC and weighed it again. The difference in mass was 7.9g . Identify the gas. Expr..
xplain which cation(s) is(are) definitely present, which is(are) definitely absent as well as which is(are) uncertain in P1 and S1 based on the evidence give? State balanced net ionic equations to illustrate your reasoning.
the reaction of z-butenedioic acid fumaric acid with butadiene sulfone gives only one product. draw the product of this
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay.
What is the vapor pressure in mmHg of a solution prepared by dissolving 5.00g of benzoic acid (C7H6O2) in 100g of ethyl alcohol (C2H6O) at 35 C?
Give the formula of a compound that contains a secondary hydrogen and Give the formula of a compound that is a secondary alcohol
The mass spectrum of an organic compound shows the relative abundances of M to be 58.09% and M 1 to be 15.08%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound
In reference to question 6-88a: a. Explain why borane (BH3) reacts readily with the pi electron system of an alkene. b. Explain why diborane (B2H6) reacts only very slowly with C double bond C groups
give the structural formula of the organic products formed (if any) when (a) ethanal and (b) propanone are treated with:
how many grams of co2 are generated when 98.5 grams of aluminum oxide form, according to the equation al2(co3)3=>al203+3co2
How many minutes would a 12.5 ampere current have to be applied to plate out 12.5 grams of copper metal from aqueous copper(II) sulfate solution
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