Math
The problem I have to solve is log with base 2 ^6 multiply by log base 6 ^ 8. I use the change of base formula and got log6/log2 * log8/log6 Which become log6/log2 * log2()^3/ log 6 I'm stuck here thanks.
Chemistry
So I did a lab that consist of baking cookies and the mass of the final products isn't equal to the ingredients used. Could there be mass lost as gas ? What other factors might there be? Thanks
Chemistry
Find the polar coordinate of the following. (0,-6) I know r = sq.root of 6 but tan theta = -6/0 doesn't exist so how will I find the degree? Thanks
Chemistry
Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 - Enthalpy is 160.9 kj H2 + 1/2O2 = H2O - Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 - Enthalpy is 288.6 I try using Hess Law but cannot solve it. Can anyone help me fin...
Chemistry
3-Pentene **
Chemistry
Name the compounds CH3CH2CHCH2CH3 - Is this 3-Pentane? Thanks
Chemistry
How much water must be added to 6 mL of a 0.05M stock solution to diltue it to 0.02M ? The answerI got is 15 mL. Is this correct? Thanks
Math
Is 2Cos x the same thing as Cos^2 x? Thanks
Precalculus
Verify the identities. Cos^2x - sin^2x = 2cos^2x - 1 When verifying identities, can I work on both side? Ex. 1 - sin^2x - sin^2x = 1 - 2sin^2x 1 - 2sin^2x = 1 - 2sin^2x
Chemistry
Now that you mention it, I checked and under those conditions , the first value should not be 3.21 mols. So I guess that why I was unable to get the correct answer for 5.29 mols.I think the point of the conditions was just to say that the condition for the change were the same...
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