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3 years ago

How many grams of K2Cr207 are in 250. mL of 0.500M of K2Cr207:

Chemistry

1 answer:

goldenfox [79]3 years ago

7 0

Analysing the Question:

We are given a 250 mL solution of 0.5M K₂Cr₂O₇

Which means that we have:

0.5 Mole in 1L of the solution

0.125 moles in 250 mL of the solution [dividing both the numbers by 4]

Mass of K₂Cr₂O₇ in the given solution:

Molar mass of K₂Cr₂O₇(Potassium Dichromate) = 194 g/mol

we know that we have 0.125 moles in the 250 mL solution provided

Mass = Number of moles * Molar mass

Mass = 0.125 * 194

Mass = 36.75 grams

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3 years ago