Chemistry Answers

Which of the following equilibrium systems will shift to produce a greater yield

of products when the volume of the container is increased, decreasing the

total pressure?

A) C(s) + O2(g) ⇌ CO2(g)

B) 2NO2(g) ⇌ N2O4(g)

C) N2(g) + 3H2(g) ⇌ 2NH3(g)

D) C(s) + NO2(g) ⇌ CO(g) + NO(g)

( which answer is correct )

An example of a system at dynamic equilibrium is:

A) the steady colour of the hottest Bunsen-burner flame

B) the steady temperature of water boiling in an open beaker

C) a piece of magnesium metal in a beaker of hydrochloric acid

D) a glass of water with a lid on it

( which example is correct )

An example of a system at static equilibrium is:

A) a closed soft drink bottle

B) a saturated solution of table sugar with undissolved sugar crystals

evident

C) the ashes of burnt magnesium metal

D) a pot of boiling water with a lid

Solution X containing 0.020 mol of iron(II) sulfate requires 22.5 mL of potassium manganate(VII) for a complete reaction. The equation for the reaction is: 5Fe²⁺ + MnO^4- + 8H⁺ → Mn²⁺ + 4H₂O + 5Fe³⁺. What is the molarity of the KMnO₄ solution? (5 Points)

How much table salt should be added to 300 g water to lower its freezing point to -2.00°C? 

What is the molality of ions (individual elements) in the solution that contains 48 grams of Sugar (C2H6O) and 250 mL of water?

What is the mole fraction of the solvent that contains 10.0 grams of Phosphorus pentachloride that has been dissolved in 750 mL of water?

What is the mole fraction of the solute that contains 10.0 grams of Phosphorus pentachloride that has been dissolved in 750 mL of water?

What is the percentage by mass of the solution that contains 10.0 grams of Phosphorus pentachloride that has been dissolved in 750 mL of water?

How many mL of hydrogen peroxide are needed to make an 11.3% solution by volume of hydrogen peroxide if you want to make 689 mL of solution?