Chemistry Forum

olwap wrote:PCl5 + H2O = H2PO4 + HCl

How will i balance it using the online balancer?

There is no such compound as H2PO4.
It should be H3PO4 - phosphoric acid:
PCl5 + H2O = H3PO4 + HCl
(click on it to see balanced equation)

Hwguy wrote:cool trick but i would not want to try it. If those bottles go off early they can and have removed fingers and in one case a guys genitals...

As far as I remember my supervisor has shown this experiment to freshmen during the lecture.
... I should probably warn her

here are the problems--- A compound analyzes to be 37.5% C, 12.5% H, and 50.0% O. The molecular mass of the compound is 93.0. What is the molecular formula of the compound? (Type your answer using the format CH4 for CH4. Keep the elements in the order given.) ---------------------------------------...

Hey guys. I put this equation in the balancer. But it didn't work. Could you help me out ASAP? H{+}+HgS+CI{-}+NO{3-} ----> HgCl4{2-}+S+NO+H2O First you have enetered Cl as C(carbon) and l(iodine), and the second is that you most probably want NO3{-} instead of NO{3-}: H{+} + HgS + Cl{-} + NO3{-} = ...

Lawrence260 wrote:calculate the mass of NaCl produced from a 0.5g sample of pure sodium carbonate

Na2CO3 + 2HCl = 2NaCl + H2O + CO2
m(NaCl) = 2*M(NaCl)*m(Na2CO3)/M(Na2CO3)

I am trying to balance the following ionic reaction but nothing works, either the atoms don't balance or the charges on both sides of the reaction don't balance. Can you please show me the steps how to balance it. The charges are in curly brackets. IO3{-}(aq) + I{-}(aq) = I3{-} (aq) I first balance...

venugokul wrote:What reaction held strountium acetate+ zinc acetate themal decompose?

Strontium acetate thermal decomposition:
Sr(CH3COO)2 = SrCO3 + (CH3)2CO

Zinc acetate thermal decomposition:
Zn(CH3COO)2 = ZnO + CO2 + (CH3)2CO

dmarks wrote:I have no being able to get the right answer, I think my brain blocks anything with a % sign on it (childhood trauma)
need a 500 g of a 5% HCl solution, a 37% by mass of HCl stock solution will be used to prepare.
Help

m(HCl) = 500 g * 5% /100%

m(37% HCl) = m(HCl) / 37% * 100% = 500 g * 5 % / 37 %

The problem is this: The heat of formation of ethanol, C2H5OH, is -227.0 kJ/mol at 298.15 K. Calculate the heat of combustion of one mole of ethanol, assuming that the products are CO2 and H2O. My issue is that I can't seem to balance the chemical equation! I put it in the balancer on this site and...

How do you calculate the frequency of light that has a wavelength of 4.7X10^-7 and what is the color? :shock: wavelength = 4.7X10^-7 m frequency = c / wavelength = 3x10^8 / 4.7X10^-7 color = blue Color Wavelength (nm) Red 780 - 622 Orange 622 - 597 Yellow 597 - 577 Green 577 - 492 B...

Hi! can someone PLEASE help me balance this equations!! its been boggling my mind!! (NH4)2C2O4+H+NO3 -> CI2+NO2+N2O+H2O This is equation is not correct since you have Cl2(?) among products, and do not have it in reagents. If you've meant CO2 instead of CI2: (NH4)2C2O4 + 4 HNO3 = 2 CO2 + 2 N2O + 2 N...

NATA758 wrote:HOW MANY GRAMS OF CuO ARE NEEDED TO PORDUCE 150G OF COPPER?

HOW MANY GRAMS OF AG2S ARE NEEDED TO PRODUCE 10.5G OF SILVER?

1) (150 / M(Cu)) * M(CuO)

2) ((10.5 / M(Ag)) / 2) * M(Ag2S)

M - is a molar mass

If from a 50.0g sample of an iron ore containing Fe3O4, 2.09g of Fe is obtained by the (unbalanced) reaction: Fe3O4 + 2C yeilds 3Fe + 2CO2 What is the percent of Fe3O4 in the iron ore? Fe3O4 + 2C = 3Fe + 2CO2 1) Calculate mass of Fe3O4: m(Fe3O4) = m(Fe) / M(Fe) / 3 * M(Fe3O4) 2) Caculate the percen...

scuba2 wrote:I was trying to balance this equation from my homework:
H2SO4 + Zn = ZnSO4 + H2O
Balancer tells 'an imposible reaction'.
Does anybody know why? and what am I doing wrong?

It's indeed an imposible reaction.
There should be H2 instead of H2O:
H2SO4 + Zn = ZnSO4 + H2

admin wrote:Two new vesrions of periodic table have been added!
Printable Periodic Table
B/W Printable Periodic Table

Nice!