Chemistry Answers

Calculate the number of grams of AgNO3 needed to make 8.35 L of a 2.23 molar solution of AgNO3 ?

The noble gas configuration of oxygen is

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

What is the identity of element X in this equation? ⁴²19K-->42₂₀X + 0-1ß

H₂S + NO₃ S₈ + NO

Calculate the concentration of OH^- in a 0.15 M solution of NH₃. K_b = 1.8 × 10^-5

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?

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