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Concept explainers
(a)
Interpretation:Mass in grams for 0.68 mol KMnO4 is to be calculated.
Concept introduction: The formula to convert moles to mass in grams is as follows:
Mass=(Number of moles)(molar mass)
The formula to convert number of atoms to moles is as follows:
Number of moles=Given number of molecules6.022×1023
(b)
Interpretation: Moles of O atoms in 8.18 g Ba(NO3)2 is to be calculated.
Concept introduction:The formula to convert mass in grams to moles is as follows:
Number of moles=Given massmolar mass
(c)
Interpretation:Number of O atoms in 7.3×10−3 g CaSO4⋅2H2O is to be calculated.
Concept introduction:The formula to convert number of atoms to moles is as follows:
Number of molecules=(Number of moles)(6.022×1023)
The formula to convert mass in grams to moles is as follows:
Number of moles=Given massmolar mass
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Chapter 3 Solutions
Principles of General Chemistry
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