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| Questions:
TimeLeft: Posted: |
Chemistry
Which one of the following chemical equations is balanced?
A. 2NaCl + H2SO4 ¨ HCL + NaSO4
B. NH3 + H2O ¨ 2NH4OH
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Apr 30th |
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An industrial plant that specializes in cleaning up waste liquids is confronted with a problem of separating the metal ions found in a large vat of s more... |
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Apr 29th |
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An industrial plant that specializes in cleaning up waste liquids is confronted with a problem of separating the metal ions found in a large vat of s more... |
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Apr 29th |
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The gaseous reaction:CO +H20---->CO2 + H2. has and equilibrium constant, Kc=4.06 when it reaches the equilibrium at 773 K. If 0.053 moles of CO rea more... |
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Apr 28th |
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The reaction A------>B has an activation energy, Ea, of 411kJ/mol. AT 400 degrees Celsius, k=7.8 mol^-1 L s^-1. Find the temperature in Celsius deg more... |
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Apr 28th |
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Find the final concentration (in mol/L) of A after 1 minute in a first-order reaction (k=0.000622s^-1). The initial concentration of A is 0.5 mol/L. more... |
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Apr 28th |
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What are the units of the kinetic constant (k) of the following kinetic expression:rx=k[A][B]^2 more... |
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Apr 28th |
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Find the final concentration (in mol/L) of A after 1 minute in a first-order reaction (k=0.000622s^-1). The initial concentration of A is 0.5 mol/L. more... |
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Apr 28th |
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What are the units of the kinetic constant (k) of the following kinetic expression:rx= k[A][B]^2 more... |
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Apr 28th |
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Subtance A, B, and C have Rf values of 0.90, 0.35 and 0.60 respetively. Draw the spots and the solvent front that would be consistant with these value more... |
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Apr 23rd |
a lab procedure requires .75 kg of a solvent 3m (3 molal) Nacl
what is the mass of NaCl needed? i need to no how to do this exactly.
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Apr 20th |
how many atoms are there in a chromium sample with a mass of 13 grams?
show all work please
answer asap please more... |
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Apr 17th |
1. A cylinder contains a mixture of hydrogen and chlorine molecules. Compare without doing any calculations the following:
a. the relative mass o more... |
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Apr 12th |
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2Cu + S ->Cu2S more... |
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Apr 8th |
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Estrogen is a female sex hormone that is known to contain 80.0% carbon, 8.2% hydrogen, and the remainder oxygen. If 793mL of estrogen is found to have more... |
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Apr 1st |
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