General Chemistry Answers

When calculating the mass of Cu2Se formed when 40.0g copper metal reacts with 28.0g selenium. What is the amount of excess reactant that is left over.

When done calculating the mass of Cu2Se formed when 40.0g copper metal reacts with 28.0g selenium. What is the limiting reactant?

the mass of Cu2Se formed when 40.0g copper metal reacts with 28.0g selenium

General chemistry

Using the balanced equation above, how many moles ofAl2(SO4)3 would be produced if you began the reaction with 5.8 mol of Al(OH)3?

Using the balanced equation above, how many moles of CO2 would be produced alongside 30.5 mol of H2O?

Consider the following reaction:

5Fe2+ + 2MnO4-  + 8H+ → Mn2+ + Fe3++ 4H2O 

1. Which substance is oxidized? 
2. Which substance is reduced?
3. Which substance is the oxidizing agent?
4. Which substance is the reducing agent?

The SO2 present in air is mainly responsible for the phenomenon of acid rain. The concentration of SO2 can be determined by titrating against a standard permanganate solution as follows:

5SO2 + 2MnO4 negative + 2H2O —> 5SO4 2 negative + 2Mn 2 positive + 4H positive

Calculate the number of grams of SO2 in a sample of air if 7.37 ml of 0.00800 M KMnO4 solution are required for the titration

If the silver phosphate solubility product –
Ag3PO4 for pKs = 18.2; the concentration of silver in a
saturated solution will be:

Find the percent by mass of oxygen (O) in potassium chlorate, KClO3.