Okay. I need help with this really simple problem that I keep getting wrong.
If you measure out 49.95 mL of 0.113 molar HCl solution, how many moles of HCl would be contained in that volume of HCl? (The units for your answer is moles, but just enter the number. Use exponential form, thus 4,900 is 4.90e03)
The answer has to have correct significant figures.
My answer was 6.00e-03, but it says that its wrong. How should I do this problem to get the right answer?
2007-04-26 05:49:00 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
0.04995L * 0.113M = 0.00564 moles
= 5.64 * 10^-3 moles HCl
2007-04-26 05:54:41 · answer #1 · answered by Dr Dave P 7 · 0⤊ 0⤋
Convert the volume to liters: 49.95 mL = 0.04995 L
Multiply that by the molarity to get moles: 0.04995 X 0.113 = 5.64 X 10^-3 mol
3 significant figures because the molarity has only 3.
2007-04-26 12:53:51 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋