Physical Chemistry Answers

The concept of determining which reactant is limiting and which is in excess is akin to determining the number of sandwiches that can be made from a set number of ingredients.

Assuming that a cheese sandwich consists of 2 slices of bread and 3 slices of cheese, determine the number of whole cheese sandwiches that can be prepared from 36 slices of bread and 63 slices of cheese.

Write a balanced overall reaction from these unbalanced half-reactions.

In⟶In3+

Cd2+⟶Cd

Write the net ionic equation, including phases, that corresponds to the reaction

Zn(ClO4)2(aq)+K2S(aq)⟶ZnS(s)+2KClO4(aq)

Calculate the number of pounds of CO2 released into the atmosphere when a 16.0 gallon tank of gasoline is burned in an automobile engine. Assume that gasoline is primarily octane, C8H18, and that the density of gasoline is 0.692 g⋅mL−1. This assumption ignores additives. Also, assume complete combustion.
Useful conversion factors:
1 gallon=3.785 L
1 kg=2.204 lb

2Al + 6HCl(s) ---------------------------> 2ACl3(s) + 3 H2(g)

how many moles of hydrogen would be obtained if 2.7g of aluminum reacts with excess hydrochloric acid?

Complete and balance the molecular equation for the reaction of aqueous sodium sulfate, Na2SO4, and aqueous barium nitrate, Ba(NO3)2.
What is the molecular equation?
what is the net ionic equation?

What is the maximum mass of S8 that can be produced by combining 79.0 g of each reactant?

8SO2+16H2S⟶3S8+16H2O

Assuming an efficiency of 49.40%, calculate the actual yield of magnesium nitrate formed from 130.8 g of magnesium and excess copper(II) nitrate.

Mg+Cu(NO3)2⟶Mg(NO3)2+Cu

An aqueous solution containing 6.16 g of lead(II) nitrate is added to an aqueous solution containing 6.62 g of potassium chloride.
what is the balanced chemical equation for this reaction?
what is the limiting reactant?The percent yield for the reaction is 79.7% . How many grams of precipitate is recovered?
How many grams of the excess reactant remain?

Write and balance the equation for the complete combustion of acetylene, C2H2. Phase symbols and energy changes are optional.