How many molecules of NaCl are in 280 ml of .8M NaCl?
I need help on studying these materials.....i have finals next week, and chemistry is not my subject......but i need at least a B in the class. Plz Help me......
2007-01-23 16:22:40 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Can you show me how you did it?
2007-01-23 16:27:27 · update #1
.8 Molar NaCl means "0.8 moles per liter of solution"
.8 moles/liter x .280 liters = .224 moles of NaCl
(Note: 280 milliliters = .280 liters)
.224 moles of NaCl x 6.02 x 10^23 molecules/mole = =1.348 x 10^23 molecules of NaCl
2007-01-23 16:33:50 · answer #1 · answered by actuator 5 · 1⤊ 0⤋
first guy said it before i could.
2007-01-24 00:27:33 · answer #2 · answered by Hi 1 · 0⤊ 1⤋
15
Easy as Pi.
2007-01-24 00:26:30 · answer #3 · answered by Knowledgeable One 3 · 0⤊ 1⤋