these problems, but you are not allowed to ask or discuss with each other. The d

Question

these problems, but you are not allowed to ask or discuss with each other. The deadline is 924 ah D 1. High above the stratosphere, the atmospheric temperature may reac not burn up because the concentration of molecules is very low and mol transfer very little energy. Calculate the root-mean-square velocity, in m (Write out your calculation, otherwise you will score zero if you only give a number for your answer.) h 1091 K. However, spacecraft and astronauts do ecular impacts on spaceships or astronauts /s, of ozone molecules at that temperature? 2. Write out examples of an ionic compound, a covalent compound, an oxoacid, and a base respectively. Then name the four chemicals. Give your most familiar or most favorable electron transfer reaction and balance it. Point out the oxidizing and

Explanation / Answer

1)

We shall employ the equation

vrms =(3RT/M)

where vrms is the root mean square velocity, R is the universal gas constant (8.314 J/mol.K 8.314 kg m2/s2mol.K); T is the absolute temperature ( = 1364 K here) and M is the molar mass in kg = (48/1000)kg/mol = 0.048 kg/mol

Hence, we obtain

vrms = [3.(8.314 kg m2/s2mol.K).(1364 K)/(0.048 kg/mol)]

or, vrms = 841.88 m/sec

Ans: The rms velocity of ozone molecules at 1091°C is 841.88 m/sec

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