Chemistry Answers

Determine the ppm of K+ ions in an aqueous solution, given that there are 0.300 g of KCl in 1.50 L of water. Assume the density of water is 1.00 g mL-1 .

Determine all possible ratios for the following balanced chemical equations.

a) 4Al(s) + 3O2(g)→2Al2O3(s)

b) 3Fe(s) + 4H2O(l) → Fe3O4(s) + 4H2(g)

It is appropriate to return any excess solvent or solution back into the reagent bottle

For the following reaction at 373 K, Kc = 0.50. If the initial concentration of N2O4 is 0.152 M, what is the equilibrium concentration of NO2?

N2O4 (g) ⇆ NO2 (g)

Нашел место, где делают зеркала на заказ, зеркальные панно и прочие предметы для интерьера. Посмотрите их сайт

[url=https://panno-zerkalnoe.ru/]зеркальное панно на заказ[/url]

[url=https://panno-zerkalnoe.ru]https://panno-zerkalnoe.ru[/url]

[url=https://www.google.dj/url?q=http://panno-zerkalnoe.ru]http://gadgets.gearlive.com/?URL=panno-zerkalnoe.ru[/url]

The four successive ionization energies for an unknown element are;

I1=896kJ/mol

I2=1752kJ/mol

I3=14807kJ/mol

I4=17948kJ/mol

To which family in the periodic table does the unknown element most likely belong?

 A real gas behaves most like an ideal gas under the following conditions:

Steel wool , which is made of pure iron metal, burns with oxygen gas to produce ferric oxide (Fe2O3). Fe(s) + O2(g) ( Fe2O3

If there are 1.25 moles of Fe and 1.25 moles of O2,

How many moles of Fe2O3 will be produced? What is its mass?

If the actual laboratory yield is 95.8g Fe2O3, what is the rection’s percent yield?

20cm^3 of carbon dioxide has sparked with 20cm^3 of oxygen. If all the volume of gases are measured at stp calculate the volume of residual gas after sparking