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1. What volume (in mLs) of 0.789M ethanol contain 0.0657 moles of solute?

V x 0.789moles/L = 0.0657moles. V = 0.0657/0.789 =       (in L)

1 Answers Ā· Science & Mathematics Ā· 11/11/2012

2. How much NaCl is needed if you have 100 mL of a 1 g% solution?

1mg NaCl to 100ml would would yeild a 1% solution. (assuming pure NaCl), now if you talking about molarity then that may be a bit different.

2 Answers Ā· Science & Mathematics Ā· 06/05/2011

3. Easy concentration titration question?

...67 x 0.200)/1000 = 0.000934 moles of H+ Since you have 10 mLs . . . that's (0.000934 moles) / 10 mL x (1000 mL/1L...

1 Answers Ā· Science & Mathematics Ā· 12/03/2012

4. Can you help me with this quick lab question (wont take more than 5 minutes to answer)?

Sounds like a titration? If you got an air bubble then the volume effectively changes, therefore the number of moles delivered is changed as well. MLS (ASCP) MB

2 Answers Ā· Science & Mathematics Ā· 19/07/2013

5. Chemistry Questions, PLZ!!!?

...the reactive part of the solution) which is why you need not worry about a few mLs from a wash bottle. Hope this helps!

2 Answers Ā· Science & Mathematics Ā· 02/06/2010

6. how does salt affect carboantion?

If I understand your experiment, it sounds like as the carbonation comes out of the pop it is contained in the test tube and the pressure pushes the pop out of the test tube and into a beaker? The principle here is there is carbon dioxide that...

2 Answers Ā· Science & Mathematics Ā· 04/02/2009

7. 9.97mL of cobalt nitrate to moles?

if you have a solution whose concentration is given in moles, you don't even need the molar mass to do this! your concentration was 0.200 but you left out the units.. a common reason why people get confused.. it is 0.200 moles per litre so...

1 Answers Ā· Science & Mathematics Ā· 02/10/2013

8. Synthesis of benzocaine. Solvent question. HELP?

Yes: the reaction would be slower and the yield much lower.

2 Answers Ā· Science & Mathematics Ā· 11/03/2013

9. buffer and pH question?

From the Henderson-Hasselbalch equation pH = pKa + log[CH3COO-]/[CH3COOH] pKa = 4.74 5.00 = 4.74 + log[CH3COO-]/[CH3COOH] [CH3COO-]/[CH3COOH] = 1.82 all of the CH3COO- comes...

1 Answers Ā· Science & Mathematics Ā· 26/11/2013