How many atoms are in 43.5 grams of potassium sulfate?

Answer 1

There are 1.895X10^23 atoms in 12.3 grams of potassium. Potassium is a chemical element with the symbol K and the atomic number 19. The Atomic Mass of potassium is 39.0983 unified atomic mass units.

Answer 2

What a random amount of Potassium. Let me answer generally first so that you can solve this question for any atom and amount.

First you want to find a Periodic Table. There are generally two numbers for each element (although some periodic table have many more than two) The whole number is the atomic number or the number of protons. The other number is the average atomic mass. This is mass in grams of one mole (a term like dozen or gross used to count large numbers) of the element. Potassium's atomic mass is 39.098 g/mol.

Lets divide 106.2 g by 39.098 g/mol to find the number of moles. There are 2.716 moles of Potassium. Before we said that a mole was a way to count large numbers. One mole of anything is 6.022 x 10^23 things. That is a 6 with 23 zeros following it. Since we have 2.716 moles we will multiply this by 6.022 x 10^23.

There are 1.636 x 10^24 atoms in 106.2 g of Potassium. Another way to write that number is 1,636,000,000,000,000,000,000,000 atoms.

Answer 3

The formula of potassium sulfate is K2SO4, and the gram formula unit mass is 174.25. The formula shows that each formula unit contains 7 total atoms, and a full gram formula unit always contains Avogadro's Number of formula units. Therefore, the answer is 7(43.5/174.25)(6.022 X 1023) or about 1.50 X 1024 atoms, to the justified number of significant digits.

Answer 4

6.023×10^23