1.masa molecular de cloruro de calcio: CaCl2
Mm CaCl2
Ca: 1 x 10 = 40 g/mol
Cl: 2 x 35.45 = 70.9 g/mol
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Mm = 110.9 g/mol
Calcula el numero de moles que habrá en
a. 49 g de H2SO4
Mm H2SO4 = 98 g/mol
n = masa/Mm
n = 49 g / 98 g/mol
n = 0.5 mol de H2SO4
b. 20*10 a la 20 moléculas de H2SO4
1 mol ---- 6.022 x 10²³ moléculas
x ----- 20 x 10 ²⁰ moléculas
x = 0.00332 moles H2SO4
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1.masa molecular de cloruro de calcio: CaCl2
Mm CaCl2
Ca: 1 x 10 = 40 g/mol
Cl: 2 x 35.45 = 70.9 g/mol
``````````````````````````````````````````````````````
Mm = 110.9 g/mol
Calcula el numero de moles que habrá en
a. 49 g de H2SO4
Mm H2SO4 = 98 g/mol
n = masa/Mm
n = 49 g / 98 g/mol
n = 0.5 mol de H2SO4
b. 20*10 a la 20 moléculas de H2SO4
1 mol ---- 6.022 x 10²³ moléculas
x ----- 20 x 10 ²⁰ moléculas
x = 0.00332 moles H2SO4