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Asked Oct 8, 2019
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how many moles of Cr are in 2.16 mol of Cr2O3?

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Expert Answer

Step 1

The concentration of any substance can be expressed in different ways such as molality, molarity, normality etc. Some other ways are ppm, ppb, mole fraction and mass percentage.

Step 2

The ppb or ppbm is used to measure the concentration of a substance usually for the pollutants in air and soils. Here 1 ppb can be defined as the 1 µg of substance found in per kg of solid, therefore it can be written as µg/kg.

Step 3

The molar mass of any substance is the mass of 1 mole of that substance. The unit of molar mass is gram/ mole.

1 mole of any substance ...

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