(chem) this will make me or break me :(
All of these can be worked with (P1V1/T1) = (P2V2/T2)
Chemistry
If the solution is saturated it will stay saturated although the solid form and the aqueous form still will exchange places; i.e. some of the excess solid will dissolve but at the same time some of the material in solution will come out of solution so that the net effect is th...
chemistry
I don't think the shape has much to do with reaction rate other than how much surface area is exposed. Increasing the surface area increases the rate of reaction.
chemistry
Generally adding more (higher conc) acid will increase rate and lower M will decrease rate. Changing the volume up or down will not impact the rate assuming you have enough to begin with to have a reaction.
Chemistry
Tmofey, you didn't do anything wrong in your chemistry. I think the problem is math. I see 20g and 30g as having 2 significant figures so you can't report more than 2 in your answer. If you are keying this into a database, as I suspect, those things are notoriously unf...
Wavelength PLEASE HELP
c = fw c = speed of light (3E8 m/s) f = frequency in Hz (convert MHz to Hz) w = wavelength in meters. For time, distance = rate x time. d = 33.4 km converted to meters. r = 3E8 m/s t = seconds.
gen chem 1
Something about this problem doesn't add up. If you go with 20 g CaCO3, that is 20/100 = 0.2 mol and that will produce 0.2 x 44 = 8.80g CO2. However, if you add 81.00 g to 20 g to make 101 g total and you reweigh after the CO2 is expelled, the loss in mass is 101.0-92.80 =...
Chemistry
4.44E34 atoms C x (1 mol C/6.02E23 atom C) x (1 mol C2H2/2 mols C) x (26 C2H2/1 mol C2H2) = ? Note: 4.44E34 atoms C x (1 mol C/6.02E23 atoms C) converts atoms C to mols C atoms. ? x (1 mol C2H2/2 mols C) converts mols C atoms to mols C2H2 molecules. ? x (26 C2H2/1 mol C2H2) co...
Chemistry
Use P1V1 = P2V2
chemistry
E = 2.18E-18(1/4 - 1/25) That is E in J/atom That x 6.02E23 = E in J/mol Then convert to kJ. 1/4 = 1/n^2 1/25 = 1/5^2
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