Question

5,81 White The phaphorus gas effect meles at a anel rate then vaporize at high Temperature that Ts 0,404 times that of neon & The How many White same apparatus atom are in phosphorus? nuclear the a molecule same of couchition. gasous .

Answer 1

Stepwise approach to such problems is discussed below, hence it is requested to go through it-

Que. white phosphorus melts and then vaporizes at high e that temperature. Gaseous white phosphones effuses at a rate to is 0.404 times that of neon in the same apparatus under the same conditions. How many atoms are in a molecule of gaseous white phosphones ? Let ip = rate of effusion of phosphones and Tine = rote of effusion of neon. Given : Phosphones effuses at a rate that is 0.404 times that of neon in the same apparatus under the same conditions - Tp = 0.404 x t ne Now, we know that, rate of effusion (r) of any gas having molar mass (M) is given by - ra VM Thus, we can calculate the rne - The Vie - Voce = 0.222 Now substitute the value of rne in equation - tp = 0.404 x 0.222 = 0.08968 We also know the formula to cal wate rp - vp = me Rearrange the equation - VMPO = typ = 609968 square both the sides - Mpe = (11.1497)2 = 124.32 Lastly, 31 g/mol -: 11.1497 pro . 124:32 8/mol moi 4 Thus, there are 4 atoms in a molecule of gaseous phosphones.