Chemistry Answers

Consider the following reaction:

H2O(g) + CO(g) H2(g) + CO2(g)

The equilibrium constant Kp for this reaction is 0.55 at 1023 K.

(i) In a reaction vessel, water vapour and carbon monoxide are introduced at a pressure of 3.50 atm, and allowed to reach equilibrium at 1023 K. Construct a table and use it to calculate the partial pressure of all the gases at equilibrium.

The reaction of 1.00 mol of solid phosphorus with chlorine gas to form PCl3(g) releases 287.0 kJ of heat energy. The reaction of 1.00 mol of solid phosphorus with chlorine gas to form PCl5(g) releases 374.9 kJ of heat energy. Using Hess’s law, indirectly calculate the enthalpy change (in kJ.mol-1 ) for the following reaction. [8 punte. / 8 marks.] PCl3 (g) + Cl2 (g) → PCl5 (g) 

Nitric acid is formed by the reaction of nitrogen dioxide with water: 3NO₂(𝑔) + H₂O(ℓ) → NO(𝑔) + 2HNO₃(𝑎𝑞) How many grams of nitrogen monoxide, NO, are produced when 180.2 g of H₂O react with nitrogen dioxide?

For the reaction 2NO(g) + 2H2(g) yields N2(g) +2H2O(g), the equilibrium constant is 16.7/M. What is the concentration of H2O if NO = 0.34M, H2 = 0.23 M and N2 = 0.40M.

what is the mass of salt deposited if at 70 degree celsius 15.0gram of potassium trioxochlorate(v) saturates 50 centimeter cube, at 25 degree celsius 10.0gram of the salt saturate 40 centimeter cube of the salt is cooled from 70 degree celsius to 25 degree celsius

An environmental chemist needs a carbonate buffer

of pH 10.00 to study the effects of acid rain on

limestone-rich soils. How many grams of Na2CO3

must she add to 1.5 L of freshly prepared 0.20 M

NaHCO3

to make the buffer? pKa of HCO3–

is 10.

at 70\deg c 15.0g of potassium trioxochlorate(v) saturates 50cm cube whole at 25\deg c 10.0g of the salt saturate 40cm cube of the salt is cooled from 70\deg c to 25\deg c calculate the mass of the salt deposited (oxygen=16, chlorine=35.5, potassium=39) 

for a sodium atom, the outermost orbit containing electrons is the?

A 2.30g sample of white solid was vaporized in a 345mL vessel.If the vapor has a pressure of 985 mmHg at 148°C , what is the molecular mass of the solid

What is the molarity of H₃PO₄ solution if 358 mL is completely titrated by 876 mL of 0.0102 M Ba(OH)₂ solution?