ChemLover

A 30.9 L cylinder containing C2H4F2 at a pressure of 114.0 torr is connected by a valve to 0.865 L cylinder containing C4H10 at 114.0 torr pressure. Calculate the partial pressure (atm) of C4H10 when the valve is opened.

What intermolecular force exists between the CH3CH2CH3 , CH4 , or the "CH3CH2" end of the ethanol molecule and the water molecules? A. dipole-dipole forces B. hydrogen bonding C. London Dispersion forces D. no intermolecular interaction exists

Silver crystallizes in a face centered cubic unit cell with an edge length of 0.40836 nm. Calculate the density of silver in grams per cubic centimeter i know the answer is 10.5 g/cm^3 but i keep getting lost in figure it out.

An element has ccp packing with face-centered cubic unit cell. Its density is 3.78 g/cm^3 and the unit cell volume is 2.31 x 10^-25 L. Calculate the molar mass (g/mol) of the element to 3 sig figs. the answer is 131 g/mol i first changed 2.31 x 10^-25 L t...

Is the following reaction spontaneous at 25*C? delta s reaction = -217 J/K*mol delta H rxn = -1202 KJ 2Mg (s) + O2 (g) -> 2MgO (s) delta suniverse = delta s system - delta H system / T i got positive (+) 3.81 x 10 ^ 3 J/K and my notes says it is spontaneo...

A sample of zinc metal reacts completly with an excess of hydrochloric acid: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) The hydrogen gas produced is collected over water at 25.0 °C. The volume of the gas is 78.0 L & the pressure is 0.980 atm. Calculate the am...

Calculate the change in internal energy at 1 atm & 25°C. H2 (g) + 1/2 O2 (g) ---> H2O (l) delta(H)= -286 KJ/mol Okay so i started with the equation: delta(E) = delta(H) - RTdelta(n) P= 1 atm T= 298 K but i don't exactly know what to do from here..please h...

I know this is simple arithmetic but i just cant seem to figure out the proccess in how to figure it out. X = 0.11X + 3.366 i know that X = 3.8 but i don't now how to get it

0.98 is correct but the second part is not right

i just need to know how to solve it i already know the answer

thankk you sooo much but what is what is P2???

ohhhh waitt nevermind i got it:)

for some reason i keep getting 2.63 i got 1.79 x 10^-22 g / 6.823 x 10-23 cm^3 and i keep getting 2.63...what an i doing wrong???

ohhhh never mind i forgot to multiply by 4....thank you

DS = -217 J/(K)mol DH = -1202 KJ -> -1202 x 10^3 J does this make any sense?

nvm i figure it out :)