General Chemistry Answers

9. What is the root mean square speed of Uranium Hexafluoride at 298 K and at 373 K?

11. Methane effuses through a pinhole in 64 seconds while it takes an unknown gas 124 seconds. What is the molecular mass of the unknown gas?

7. A sample of helium gas diffuses 15.0 cm in 3.0 minutes. How long would it take a sample of Cl2 gas to diffuse a distance of 15.0 cm under the same conditions? 

What is the boiling point in degrees Celsius of a solution formed by dissolving 3.75 mol of KCl in 1.00 kg of water?It is understood that the unit is ∘𝐶. Do not include units. Only enter the numerical value

When CO2(g) is put in a sealed container at 730 K and a pressure of 10.0 atm and is heated to 1420 K, the pressure rises to 24.1 atm. Some of the CO2 decomposes to CO and O2.

Calculate the mole percent of CO2 that decomposes. Express your answer using two significant figures.

What type of reagent is required to convert NO2- to HNO2?

Write a brief statement of a real world application of single replacement reactions

balance (𝐾+HO–)(𝑎𝑞) + (CO2+ 2𝑁𝑂−) → 𝐾+CO 2/3–

+ H2O 

1. What is the molarity of a solution that contains 0.5 moles of HCl in 200ml of water? 
2. What is the molarity of a solution that has 5g of H2SO4 in 150ml of water?
3. 15g of Sodium Chloride in 1.5L of water?
4. 22g of magnesium chloride in 750ml of water?
5. 2.7x 10-4g of sodium chloride in 15mL of water?

pH problems

1. What is the pH of a 0.2M HCl solution?
2. Find the pH of a 0.0015M solution of nitric acid.
3. 0.0025M sodium hydroxide solution
4. Find the pH when 5g of HCl is dissolved in 150ml of water
5. Find the pH when 4g of NaOH is added to 500ml of water

Nitric acid is formed by the reaction of nitrogen dioxide with water: 3NO₂(𝑔) + H₂O(ℓ) → NO(𝑔) + 2HNO₃(𝑎𝑞) How many grams of nitrogen monoxide, NO, are produced when 180.2 g of H₂O react with nitrogen dioxide?

For the reaction 2NO(g) + 2H2(g) yields N2(g) +2H2O(g), the equilibrium constant is 16.7/M. What is the concentration of H2O if NO = 0.34M, H2 = 0.23 M and N2 = 0.40M.

what is the mass of salt deposited if at 70 degree celsius 15.0gram of potassium trioxochlorate(v) saturates 50 centimeter cube, at 25 degree celsius 10.0gram of the salt saturate 40 centimeter cube of the salt is cooled from 70 degree celsius to 25 degree celsius