Recent content by Douglas Tavares

  1. D

    Chemistry Find the mass of one element of a sample

    The correct answer is 1.7, not 1.66 or 1.67. This question it's from coursera! 0.67gK* (1molK/39.098gK)*(1molK2CrO4)*(194.188gK2CrO4/1molK2CrO4) = 1.7g (not 1.66g or 1.67g) K = 2*39.098 Cr=51.996 O=4*15.999 K2CrO4=194.188 g