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The number of KNO3 molecules in 0.750 mol of KNO3 would be 4.52 x  [tex]10^{23}[/tex] molecules

Number of molecules

The number of molecules of a substance is defined by Avogadro's constant, such that:

1 mole = 6.022 x [tex]10^{23}[/tex] molecules

In this case, the number of mole is 0.750

Thus, the number of molecules in 0.750 moles of KNO3 can be calculated as:

        0.750 x 6.022 x [tex]10^{23}[/tex] = 4.52 x  [tex]10^{23}[/tex] molecules

More on number of molecules of substances can be found here: https://brainly.com/question/13272803

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