What are some possible problems associated with the use of qualitative tests?

2) Calculate the mass (g) of the following substances: b) 0.119 mole MgCl2

5. On what organ does alcohol have the most noticeable effect?

Oxygen gas is a compound or element

Why are hydrogen molecules called elements but water molecules are called compounds?

Which phrase describes the molarity of a solution? (1) liters of solute per mole of solution (2) liters of solution per mole of solution (3) moles of solute per liter of solution (4) moles of solution per liter of solution

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?