How many protons are in 4.78g of K?

Answer 1

4.78 grams K (1 mole K/39.10 grams)(6.022 X 1023/1 mole K)(19 protons/1 atom K)

= 1.40 X 1024 protons in that mass potassium

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Answer 2

To find the number of protons in 4.78g of potassium (K), first calculate the number of moles of K using its molar mass (39.10 g/mol). Then, since potassium has 19 protons in each atom, multiply the number of moles by Avogadro's number (6.022 x 10^23 mol^-1) to get the number of protons.