... mn = 1,00867u; mBe = 9,01219u; mC = 11,9967u; 1u = 931 MeV/c Nng lng ta t phn ng trờn l A 11,2MeV B 8,7MeV C 5 ,76 MeV D 7, 7MeV ht ca phn ng m = 4,0015u + 9,01219u 1,00867u 11,9967u = 8,32.103.u ... ln t ln 2.6 S mol Na24 cũn li sau 6h: n = n0 e- t = 10-5 e T = 10-5 e 15 = 0 ,75 79.10-5 mol 0 ,75 79.10 5.10 7, 578 = = 5,05l 5lit Chn A Th tớch mỏu ca bnh nhõn V = 1,5.10 1,5 Cõu 46: Ngi ta trn ... 48,590/1,52= 0,493 rt = 29, 570 rt = 600 29, 570 = 30,430 sinit = 1,52.sin30,430 = 0 ,77 it = 50,340 Gúc to bi tia lú mu vng v tia lú mu tớm cú giỏ tr xp x bng: 50,34-48,59 = 1 ,75 0 V Chn ỏp ỏn D T Cõu...