Question

2) Gallum 68.9256 amu, "Ga is 70.92411 natural gallium? 3) 19 Bromine has molar mass is 79.904. It has two stable isotopes, one of them is 79Br! with mass number 78.918337 amu and content 50.666%. What is the mass number and content of another isotope of bromine?

Answer 1

Solution & Given molar mass of bromine = 79.904. amu. It has two isotop. mass of one isotop 18781918337 amu ..% of this isotop = 50666%. Let the mass of other igotop bere. % of Other (and) isotop = (100-50'666), 4.9.339./ 1 the mass of 50.666 % Off 1st isotope + 4913347 of an ass oq and isotop = molar mass of bromine T 5016664 of 78.918337 + 4913347.07 x1 = 79.904 TOTXETA O'50666 x 78.918.337 + 0.4933431 = 79.904 39:9847 +0:4933431 = 79.904. - 5 0.493343 = 79.904 - 39.9847 =) 049334x = 39.9198 => x = _39.919 - = 80:9164 0:49.334

. Mass of another isotop of Bromine is 8009164 amu. .another isotop is 81Br.