Wednesday
July 23, 2014

Posts by jakob


Total # Posts: 15

physics
i dunno

Physics
Two identical objects are in the same surroundings at 4.50oC. One is at a temperature of 1400 K, and the other is at 1040 K. Find the ratio of the net power emitted by the hotter object to the net power emitted by the cooler object.

Reading
What does the word distinct mean and can you use it in a sentence?

grade 5 math (please help)
The theater group performed on Friday and Saturday night. Three hundred and twenty four attended on Friday, and 33 more attended on Saturday. How many people saw the show? I need to write an equation for this.

Chemistry
I figured it out! Thanks!

Chemistry
Calculate the pH and pOH of a solution prepared by dissolving 0.93 g of HCl in enough water to give 0.40 L of solution.

Chemistry
Why is this Alkene structure: CH3 - CH = C - CH3 | Cl called 3, chloro - 2, butene and not 2, chloro - 2, butene? I thought that the counting starts at the end closes to the first substituent? Wouldn't that make it start from the right? Thanks!

Chemistry
What is the pH of a 0.001 M formic acid solution? Ka = 1.8 x 10^-4. I don't know what to do!

Chemistry
Sorry, I understand now... thank you very much for your help!

Chemistry
I don't understand... I thought OH is only raised to the 2nd power? Not multiplied by 2 and then raised to the 2nd power? So the Ksp should be [Fe][2OH]^2?

Chemistry
Approximately 1.5 10-3 g of iron(II) hydroxide, Fe(OH)2(s) dissolves per liter of water at 18°C. Calculate Ksp for Fe(OH)2(s) at this temperature. This is what I've done: 1.5x10^-3 g Fe(OH)2/L x 1mol Fe(OH)2/89.863g Fe(OH)2 = 1.669x10^-5 M Fe(OH)2 Fe(OH)2 = Fe + 2OH Ks...

Chemistry
How many individual hydroxide ions (OH)- are found in 13.4mL of 0.586M Ba(OH)2? I'm not quite sure how to do this. Thank you!

science
what is an example of an unseen reciever of a force?

Alabama History
what river forms the border between alabama and georgia

chem
I am posed with a question which, in order to be solved, needs the Van't Hoff Factor of ethylene glycol. Some research has shown me that ethylene glycol is an electrolyte, but I don't know how it dissociates in water. Any help would be appreciated. It is not an electro...

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