learnwithvysakh

1. A 1.00 L vessel contains and unknown amount of PCl5 and0.020 mol each of PCl3 and Cl2 at equilibrium at 250°C. How many moles of PCl5 are in the vessel if Kc for thisreaction is 0.0415 at 250°C.

#Explain each and every step:-

Balance the redox reaction,

Fe(OH)3 (aq) + OCl- (aq) à FeO42- (aq) + Cl- (aq)

The reaction occurs in acidic solution.

1. Write the oxidation number above each element
2. Using the half-reaction method, balance the oxidation half-reaction
3. Using the half-reaction method, balance the reduction half-reaction
4. Write the balanced overall reaction.

The world’s largest cut diamond is the First Star of Africa. Its volume is 30.2 cubic centimeters.What is its volume in cubic inches? In cubic feet?

You measure the mass of an unknown object and obtain measurements of 25.6 g and 25.3 g. What is the percentage difference between the two measurements?

A sink hole on the ground created by the collapse of an old underground mine measures 43.5 m × 37.9 m × 9.6 m. How much volume of earth (soil and rocks) is needed to fill the sink hole? Express your answers in cubic meters and in the correct number of significant figures.

How many grams of AgNO₃ is needed to make 250 mL of a solution that is 0.135 M?

Specialized cells in the stomach release HCl to aid digestion. If 
they release too much, the excess can be neutralized with 
antacids. A common antacid contains magnesium hydroxide, 
Mg(OH)2, which reacts with the acid to form water and magnesium 
chloride solution. As a government chemist testing commercial 
antacids, you use 0.10 M HCl to simulate the acid concentration in 
the stomach. How many liters of “stomach acid” react with a tablet 
containing 0.10 g of magnesium hydroxide?