List the two main kinds of changes that you can observe when chemical reactions occur.

WILL How does one determine a percent composition from an empirical formula?

A 49.48-mL sample of an ammonia solution is analyzed by titration with HCl. It took 38.73 mL of 0.0952 M HCl to titrate the ammonia. What is the concentration of the original ammonia solution?

Why does aluminium react with iron oxide!

How does an acid-base indicator react when placed in an acidic solution? It changes color. It dissolves. It increases the pH of the solution. It releases hydroxide ions.

Convert 1.2030 moles of sodium chloride to grams

When studying atoms, scientists can ignore the force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.

How should a stopper be handled after is has been removed from a reagent bottle?

Which of the following would most likely contain carbon? a. trees b. uranium c. water d. salt

Water becomes a gas. what step is this?

If 125 mL of a 1.1 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution? Express your answer using two significant figures.