Question

A sample of pure aluminum has a mass of 15.2 g Calculate the number of moles in the sample and aluminum atoms in the sample (a) moles in the same moles (h) aluminum atoms in the sample Need Help? Bbm An Another in -/10 POINTS SERCP11 10.4.P.034.MI. MY NOTES | ASK YOUR TEACHER a ted with air originally at 10.0°C and normal atmospheric pressure. During the process of its original volume and the temperature is increased An automobile tre 45.0 (a) What the tire pressure in (1) Arter the car is driven at high speed, there's a temperature to 65.0"C and there's interior volume increases by 3.004. What is the new tire pressure (absolute) pascals

Answer 1

Shift mass of a I mole of aluminium Number of males n= 15.2 m=26.998 - 0.563 male 26.90 (6 I male = 6.023x102 adoms so number of atoms in sample is N=0.563x6.023 x 1023 N= 3.39 x 23 atoms fra Initial temperature Ti=loc final temperature = 283.15k Initial volume V = V final volume = 0.26 Initial pressure Palatma 10 1325 Po Using Ideal gas law, PV = constant - P. Vi = PE U Is = 3=318.15k

(6) V = 175 101325 x x Px0. 26X = P x 0.26X Pa. - = Pf = 437883.5 9 283.15 318.15 New final volume V = 1.03x0.26 V, Newfinal. = 85c Temperaturo =358.15k Ps. Vf = Pf Vs 437883.5x0.26 V = P x 1.030.265 318-15 358.15 P = 478579.8 Pal

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