How many grams of co are in 125 ml of a 0.25 m solution? 0.87 g 1.1 g 14 g 880 g?

1 answer:

6 0

The number of grams of Co that are in 125 Ml of 0.25 M solution is 0.87 grams

calculation
find the number of moles
moles= molarity x volume in liters
volume in liters = 125/1000 = 0.125 L
molarity = 0.25 M

moles is therefore = 0.125 x 0.25=0.0313 moles
mass = moles x molar mass

molar mass of Co= 12 +16 =28g/mol

mass is therefore = 28 g/mol x0.0313 moles= 0.87 grams

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