Example How many moles of cobalt (Co) atoms are there in 6 * 109 Co a SOLUTION number of atoms Mol of Co = = 0.996 * Avogadro's number %3D %3D 6.022 * 1023 Example How many atoms are in 16.3 g of S? SOLUTION number or atoms Mol of S %3D Avogadro's number mass of S 16.3 Mol of S = =0.51 mol %3D atomic mass of S 32 number of atoms 0.51 = 6.022 * 1023 number of atoms = 0.51 * 6.022 * 1023 = 3.067 * 1023 a

What is the percent by mass of a solution made with 43.11 g KOH and 385.0g water?

The correct amount of KF and of water that must be mixed to prepare 225 grams of a 4.18% by mass aqueous KF solution is:   a 4.18 g KF and 225 g water   b 9.41 g KF and 215.6 g water   c 4.18 g KF and 221 g water   d 9.41 g KF and 225 g water

What is the freezing point of a 1.389 m solution of C6H12O6? What is the boiling point of the same solution?   Freezing Point=? boiling point = ?