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- 9-10 Microwaves are a form of electromagnetic radiation that is used for the rapid heating of foods. What is the frequency of a microwave with a wavelength of 5.8 cm?A group of students compiled the data shown in data table 1 below. What is the exact calculated order for IO3-(aq) to 2 decimal places? Exp. # [IO3-]0 (M) [I-]0 (M) [H+]0 (M) Time (s) 1 0.005 0.05 2 x 10-5 22.12 2 0.010 0.05 2 x 10-5 86.84 3 0.005 0.10 2 x 10-5 5.35 4 0.005 0.05 4 x 10-5 2.65 Question 4 options: 2.44 -2.49 1.81 2.09 -1.72 -2.13 -2.36 1.49 2.24 -1.97 -1.53 1.65The thermogram in the figure below shows the change in mass for a sample of calcium oxalate monohydrate, CaC2O4 × H2O. The original sample weighed 42.50 mg and was heated from room temperature to1500 °C at a rate of 5 °C min. The following changes in mass and corresponding temperature ranges were observed: • Loss of 4.03 mg from 100–250 °C• Loss of 5.72 mg from 400–500 °C• Loss of 8.41 mg from 700–850 °CDetermine the identities of the volatilization products and the solid residue at each step of the thermal decomposition.
- 2 HOF(g) ------->2 HF(g) + O2(g) If ∆[HOF ]/∆t = - 4.8 x 10-6 M/s, what is the value of ∆[O2]/∆t during the same time interval?Using unit analysis determine the radius of fireball in a 100kT explosion at t = 0.010 seconds. Hint 4.184 * 10 ^ 12 * J = 1.0kT and G.I. Taylor.Nn.122. Subject :- Chemistry With explain
- A certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM = 114.22), methyl tert-butyl ether (C5H12O; FM = 88.15), and tetraethyl lead (C8H20Pb; FM = 323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pbd. % (w/w) Pb (FM = 207.2) Answer a to c onlyA certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM = 114.22), methyl tert-butyl ether (C5H12O; FM = 88.15), and tetraethyl lead (C8H20Pb; FM = 323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pbd. % (w/w) Pb (FM = 207.2) Answer Letter D onlyA certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM=114.22), methyl tert-butyl ether (C5H12O); FM=88.15), and tetraethyl lead (C8H20Pb; FM=323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pb
- A dead body was found within a closed room of a house where the temperature was a constant 70° F. At the time of discovery the core temperature of the body was determined to be 90° F. One hour later a second measurement showed that the core temperature of the body was 85° F. Assume that the time of death corresponds to t = 0 and that the core temperature at that time was 98.6° F. Determine how many hours elapsed before the body was found. [Hint: Let t1 > 0 denote the time that the body was discovered.] (Round your answer to one decimal place.)7b Preparing solutions MultiMedia Activities Solve AsapNn.174 Subject :- Chemistry