General Chemistry Answers

a buffer solution contains 0.5M of potassium carbonate and 0.5M of potassium hydrogen carbonate

estimate pH in this solution

estimate the buffer capacity against acid addition

ionisation constant of the acid is pK2 = 10.32

What is the mass of 15 • 10²² molecules of NaOH

the following set of lead determinations on seperate aliquots of a pooled blood serum were reported 103,106,107 and 114 meq/L.one value appears suspect.should the suspect be retained or discarded at 95% confidence level

H₂S + NO₃ S₈ + NO

How many grams of C2,H2,O2,CO2 and H2O are present after the reaction complete

Tom wants his balloon back to normal size so he decides to put it on a heating vent. If

the balloon initially has a volume of 0.6 L and a temperature of 293 K, what will be the volume of

the balloon when it heats up to a temperature of 176°C?

_______________________________________________

The following set of determination on separate aliquote of a pooled blood serum were reported 103,106,107 and 114meq/L one of the values appears suspect. Should the suspected be retained or discarded at 95% confidence level?

Determine the Keq for the following equilibrium:

2CH4(g) ⇌ C2H2(g) + 3H2(g)

(CH4 = 2.5 x 10-3 M ; C2H2 = 0.01375 ; H2 = 0.04125)

Find the formula of the compound with the percent composition shown

O, 41.26

P, 19.97

Ca 38.76

In a reaction between Mg and hydrochloric acid:

Mg(s) + HCl(aq) —> MgCl₂(aq) + H₂(g)

Given the data below. Examine the data. What is the average rate of reaction?

Time

2

6

8

Mass of Magnesium

0.012

0.010

0.006

0.004