Question

Cuantos gramos de metano, CH4 hay en 1.20 x 10-4 moléculas? Mm CH4 = 16 g/mol

Answer 1

Mm CH4 = 16 g/mol

calcular moles

 1 mol ----- 6.022 x 10²³ moléculas
     x    -----   1.20 x 10⁻⁴ moléculas

     x = 1.99 x 10⁻²⁸ mol

calcular gramos

g = 1.99 X 10⁻²⁸  mol  x  16 g CH4
                                       ``````````````
                                        1 mol CH4

g = 3.188 x 10⁻²⁷ gramos de CH4