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The molar mass of Potassium dichromate (K2Cr2O7) is A. 294 g/molB. 194 g/molC. 492 g/molD. 140 g/mol

User Acroyear
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1 Answer

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Step-by-step explanation

To find the molar mass of K2Cr2O7 are needed the atomic masses of each element that the molecule contains.

(Please, the periodic table is useful)

The atomic masses:

K) 39.0

Cr) 52.0

O) 16.0

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The molar mass = 2 x 39.0 (K) + 2 x 52.0 (Cr) + 7 x 16.0 (O) = 294 g/mol

Answer: A. 294 g/mol

User Pravnar
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