chemistry
You didn't convert to moles correctly. The molar mass of O2 is 22.4 L/mole ONLY at STP and 25C is not STP. Use PV = nRT, solve for n, then n/1L = M and I get 0.00126M. (Note: IF you could use 22.4, you should have divided 0.0309/22.4 = 0.00138 but that would be at 273K (ze...
chemistry
(atomic mass O/molar mass C8H8O)*100 = ??
chemistry
5% NaCl w/v means 5 g NaCl/100 mL soln. So for 250 mL soln you will need 5g x (250/100) = ?? You can look at it another way. (grams/mL)*100 = % (X/250)*100 = 5 Solve for X.
chemistry
What's the problem in doing this? I should be easy enough. Tell me your trouble; perhaps I can figure out the mental block.
chemistry
KOH is a strong base in aqueous solution; therefore, the (KOH) = (OH%-). For pH = 11.53, use pH + pOH = pKw = 14 to solve for pOH, then from pOH = -log (OH^-), solve for OH^-. That will give you the molarity of the KOH you want for that pH. Then M = moles/L. Substitute L and s...
science
delta Hrxn = (sum delta H products)-(sum delta H reactants). Look these values up in a set of tables (one probably is in your text), substitute and solve.
Chemistry
I believe amides hydrolyze to the acid and NH3 CH3CH2COOH + NH3
Chemistry
Note the correct spelling of celsius. 1a. The work you did is ok but you didn't answer the question. The answer is no, the volume will not be doubled by doubling the celsius T. 2b. You halved the volume but the temperature went up. Something wrong here. I would use 29.4 mL...
Chemistry
A Bunsen burner, if hooked to a gas supply, is a device for heating materials.
chemistry
Use the Ka expression (or the Henderson-Hasselbalch expression). Ka = (H^+)(CH3COO^-)/(CH3COOH) You are given CH3COO^- and CH3COOH, solve for H^+, then convert to pH.
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