General Chemistry Answers

Consider a 0.10 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given below. Calculate the contributions to [H3O+] from the second ionization step.

N2(g)+3H2(g) 2NH3(g) if H= -92.2KJ and S = -0.2987KJ what is G for the reaction at 475 degrees celcius and at 5 degree celcius? Provide the answer in KJ. In each case is the reaction spontaneous?

With solution

If the volume of a gas is 19.4 L at 4.99 atm, what is the volume at 1580 mmHg

____ B (s)   +   ____Br2 (g)   —>   ____BBr3 (g)

With whom tungsten reacts?

A. What is the pH of the solution containing 0.20 M NH₃ and 0.15 M NH₄Cl?

A. Calculate the pH of a buffer made from 0.28 M HNO₂ and 0.23 M NO_2-. The Ka for HNO₂ is 4.6 x 10-4.

:What would you expect the products to be from the reaction of cis-2-pentene with m-chloro-peroxybenzoic acid? 

The half-life for a first-order reaction is 32s. What was the original concentration if, after 2.0 minutes, the reactant concentration is 0.062

solutions were prepared to contain 0.1 mole of each of the following compounds in 1000 g of h20. which compound would give the lowest freezing point?

a. CO2

b. C6H12O6

c. KBr

d. MgCl