Since propane has the formula C3H8, each mole of propane will have 8 moles of hydrogen atoms, so 5 moles of propane will contain 5x8=40 moles of hydrogen.
6,35 moles of S contain 38,24059444195.10e23 sulfur atoms.
2,50 moles of silicon contain 15,055352142.10e23 atoms.
5,26 moles of oxygen contain 31,676.10e23 atoms.
Two moles of neon contain 12,044281714.10e23 atoms.
Since propane has the formula C3H8, each mole of propane will have 8 moles of hydrogen atoms, so 5 moles of propane will contain 5x8=40 moles of hydrogen.
6,35 moles of S contain 38,24059444195.10e23 sulfur atoms.
0,2 moles contain approx. 1,2.10e+23 atoms, molecules etc.
2.6 moles C9H8O4 (9 moles C/1 mole C9H8O4)(6.022 X 10^23/ 1mole C) = 1.4 X 10^25 atoms of carbon
1,638 moles contain 9,864266723766.10e23 atoms.
Since molecules of potassium contain only single potassium atoms, molecules of iodine contain two atoms, and moles of potassium iodide contain one atom of each element, 2.5 moles of iodine are needed to react completely with 5 moles of potassium.
0.75 moles of any substance is 0.75(6.02x1023) = 4.52x1023 particles. If those particles are CO2 molecules, and each molecule has 2 oxygen atoms, then it's 2(4.52x1023) = 9.04x1023 oxygen atoms.
2,50 moles of silicon contain 15,055352142.10e23 atoms.
23 moles of oxygen contain 138,509.10e23 molecules.
5,26 moles of oxygen contain 31,676.10e23 atoms.
Two moles of neon contain 12,044281714.10e23 atoms.
2,89 moles of aluminium contain 17,40398707673.1023 atoms.