The equation for the chemical reaction shown below is not balanced. What number should replace the question mark to balance this equation? 2Al + ? Cl2 → 2AlCl3 A. the number 2 B. the number 3 C. the number 4 D. the number 5

Which factors would increase the speed at which a solid solute such as sugar will dissolve, but not affect the solubility limit of the substance? Select all that apply. temperature surface area pressure stirring

Explain how you would prepare a solution of sucrose with a molarity of 0.25.

The electrical resistance of a circuit is influenced by three primary factors: 1. conductivity 2. shape 3. insulation 4. the diameter 5. length

31 gof phosphorousreacted with oxygengas to form 71 gof a phosphorousoxide. what is the empirical formulaof the oxide

Identify the type of chemical bond in a molecule reactant O2 (g) + energy - - - > O (g) + O (g)

Does beryllium or sodium have the same inside electron arrangement as magnesium

How do carbohydrates relate to organic chemistry

Periodic table, chemistry questions who discovered lanthanides. how did they discover it, when did they discover it.

A flask containing 155cm^3 of hydrogen was collected under a pressure of 22.5kPa. What pressure would have been required in order for the volume of the gas to have been 90.0 cm^3 at constant temperature?

Which change is most likely to occur when a molecule of H2 and a molecule of I2 collide with proper orientation and sufficient energy? 1. a chemical change, because a compound is formed 2. a chemical change, because an element is formed 3.