Blog

Balance the following chemical equation:          Fe2O3 (s)   +          C (s)    →           Fe (s)  +         CO2 (g) What is the correct coefficient for carbon?

The combustion of propane (C3H8) in the presence of oxygen yields the following reaction: C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g) (Ch. 3) What mass of H2O (in g) can be produced when 2.00 moles of propane reacts with 5.00 moles of oxygen?

Which of the following is best classified as a combination reaction?

A sample of pure gold contains 2.89 x 1023 atoms of gold. What is the mass (in g) of this sample of gold?  

What, if any, precipitate would form when solutions of NiCl2 (aq) and AgNO3 (aq) are mixed together? Hint:  Consult the solubiltiy rules to determine the correct answer.

What is the correct chemical formula of a compound composed of calcium ions and sulfate ions? 

Calculate the percentage by mass (in %) of hydrogen in cisplatin, PtCl2(NH3)2.

What, if any, precipitate would form when solutions of KOH (aq) and Ba(NO3)2 (aq) are mixed together? Hint:  Consult the solubiltiy rules to determine the correct answer.

A sample of pure copper contains 2.89 x 1023 atoms of copper. What is the mass (in g) of this sample of copper?

A sample of pure silver contains 2.89 x 1023 atoms of silver. What is the mass (in g) of this sample of silver?