Okay, 1 mole of any substance contains 6.02x1023 representative particles. So, if you have a mole of C2H6 (ethane), you have Avogadro's number of molecules. You're asking about atoms, so if you look at the formula for ethane, you see 2 carbons and 6 hydrogens for a total of 8 atoms per molecule. Multiply Avogadro by 8 to get the total number of atoms. Then multiply by the given number of moles.
6.02x1023 x 8 (#of atoms) x 5.6 (number of moles) = 269.7x1023 = approximately 2.7x1025 atoms.
56
560 grams is exactly .560 Kilograms.
0.250 mol
560 / 8 = 70
It is: 560/7 = 80
There are 70 8s in 560
This enthalpy of reaction is 560 joules, for liquid water at 25 oC.
560 kilograms = 1,234.5 pounds.
560 kilometers = 1,837,270.34 feet
560 ÷ 16 = 35
5.6 meters = 560 centimeters
560 Milliliters