Physical Chemistry Answers

2 C8H18 + 25 O2 ———> 16 CO2 + 18 H2O

If 114 g of C8H18 used in the above reaction, how many grams of O2 would be needed for complete reaction?

What type of bond is KCN
Is it a single bond
Is it a double bond
Is it a triple bond

At 298 K, the equilibrium concentration of O2 is 1.6 x 10-2 M, and the equilibrium concentration of O3 is 2.86 x 10-28 M. What is the equilibrium constant of the reaction at this temperature?

In d treatment of aids, how is d genetic material of hiv subdued

(∂S/∂P)T=-∝V

A mixture of 50.0g of S and 1.10×10^2 g of Cl2 reacts completely to form S2Cl2 and SCl2. Find the mass of formed.

For the reaction IO3- + 5I- + 6H+ → 3I2 + 3H2O the rate of disappearance of I- at a particular time and concentration is 5.0 x 10-3 Ms-1. What is the rate of disappearance of H+ in Ms-1?
6.0 x 10-3
3.0 x 10-3
-5.0 x 10-3
1.0 x 10-3
5.0 x 10-3

The first order rate constant for the decomposition of N2O5 to NO2 and O2 at 700C is 6.82 x 10-3 s-1. Suppose we start with 0.300 mol of N2O5 in a 0.500 L container. How many moles of N2O5 will remain after 1.5 min?
0.162 mol
0.081 mol
0.205 mol
0.555 mol
0.297 mol

The complete mechanism for a reaction is considered to occur in two steps, one of which is slow and the other fast.


A + B → C + D slow


A + C → E + F fast


The stoichiometric equation for the reaction is:
2A + B = D + E + F
A + B + C = D + E + F
A + B = C + D
A + B = D + E + F
A + C = E + F

A 12 dm3 vessel contains a gaseous mixture of H2 and He at a total pressure of 1520 torr. If 0.198 mole He is present, find the partial pressures of H2 and He.