It is important to recognize different H1 NMR spin systems and the resulting coupling patterns. Match the following common fragments with the expected pattern. R, R1 and R2 represent generic alkyl groups. Each structure will give two resonances in a H1 NMR spectrum. Predict the splitting pattern of the two resonances, in no particular order. A. A central carbon is bonded to an R group, a methyl group and two hydrogens. Predict the splitting pattern for A. doublet, singlet quartet, quartet triplet, quartet triplet, triplet B. A central carbon is bonded to two methyl groups, a hydrogen and an R group. Predict the splitting pattern for B. doublet, hextet singlet, hextet singlet, heptet doublet, heptet C. The compound is R one C H 2 C H 2 bonded to R two Predict the splitting pattern for C. doublet, doublet doublet, triplet triplet, triplet singlet, singlet

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Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap