Answer:Number of mole of H₃PO₄ = 0.306 moleExplanation:From the question given above, the following data were obtained:Mass of H₃PO₄ = 30 gNumber of mole of H₃PO₄ =?Next, we shall determine the molar mass of H₃PO₄. This can be obtained as follow:Molar mass of H₃PO₄ = (3×1) + 31 + (4×16)= 3 + 31 + 64= 98 g/molFinally, we shall determine the number of mole in 30 g of H₃PO₄ as follow:Mass of H₃PO₄ = 30 gMolar mass of H₃PO₄ = 98Number of mole of H₃PO₄ =?Mole = mass / molar massNumber of mole of H₃PO₄ = 30 / 98Number of mole of H₃PO₄ = 0.306 mole...

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