General Chemistry Answers

 In the presence of a red-hot platinum catalyst at 1000oC, ammonia gas, NH3, reacts with oxygen gas to form gaseous nitrogen monoxide and water vapour. This reaction is the first step in the commercial production of nitric acid by the Ostwald Process. Write a balanced equation to represent the reaction.

Calculate the boiling point of a 0.44 m aqueous solution of AlCl3

What is the osmotic pressure of 0.9% m/v solution of NaCl at 25°C?

C. Calculate the grams of lead (II) iodide that can be reproduced from 75.00 grams of potassium iodide

B. Calculate the grams of lead(II) iodide that can be produced from 5.00 moles of potassium iodide.

The analysis of drug methylamide (formula weight = 195 g/mol) was performed using a UV-Vis spectrometer. The methylamide has a molar absorptivity of 828 L mol-1 cm-1 at 501 nm. One tablet is dissolved in 2.5 L of water. If the solution exhibits an absorbance of 0.773 at 501 nm in a 1.0 cm cell, how many grams of methylamide are contained in the tablet?

What is the molarity of a solution that contains 0.175 moles KOH in 0.350 L of solution?

What is the molarity of a solution that contains 1.35 moles of a solute in 750.0 mL of solution?

What volume in mL of 0.220 M HBr solution is required to produce 0.0170 moles of HBr?

How many moles of KBr are there in 63.3 mL of 0.150 M KBr?

How many moles of KBr are there in 225.0 mL of 0.145 M KBr?

How many moles of KCl are there in 50.0 mL of 0.186 M KCl?

How many moles of NaI are there in 175.0 mL of 0.280 M NaI?

How many moles of NH₃ are there in 65.7 mL of 0.200 M NH₃?

THE AIT BAG EXPERIMENT:

1.the balanced chemical equation for the reaction of sulfuric acid and sodium bicarbonate is:

Na₂SO₄ + H₂O + CO₂

2.the volume of the bag (in liters): 1.20L

3.pressure: 1.0 atm

4.temperature: 23.0 degrees

5.calculate the moles of carbon dioxide needed to fill the bag using the ideal gas law (PV=nRT) equation. Show the calculations:

1x1.20/(0.082x296) = 0.05 moles

6.calculate the grams of sodium bicarbonate needed to generate enough carbon dioxide to fill the zip-lock bag taut with an excess of sulfuric acid. (show calculations)

7.calculate the mL of sulfuric acid needed to generate enough carbon dioxide to fill the zip lock bag taut with an excess of sodium bicarbonate:(show the calculations)

answer questions 6 and 7.

Explain why in some cases we obtain less absorption bands than number of mode predicted from the theoretical calculation?

Nitration of benzene followed by chlorination of the product in presence of FeBr3 gives what? a)1-chloro-2-nitrobenzene b)1-chloro-3-nitrobenzene c) 1-chloro-4-nitrobenzene d) negative