Which statement correctly describes why a compound is a pure susbstance?

If a sodium chloride (NaCl) solution in water at 40°C has reached a concentration 50% calculate the quantity of NaCl crystals that will form once crystallization has been started in per 100 g water. The solubility of NaCl at 40°C is 36.

2 3 4 5 6 What did Virchow observe that led him to determine one of the main components of cell theory?

4. If the heat of reaction is written on the reactant side of a chemical equation, what does that indicate about the reaction? ng It is an exothermic reaction. The energy of the products is less than the energy of the reactants.

Atomic number and mass of H

Solve for P2 when P1 = 2.0 atm V1 = 8.0 L and V2 = 32 L This is a Boyle's law has problem

Which molecules is amphoteric? A) NH4+ B) H2O C) H2CO3- D) H2SO4

Nickel (i) iodide reacts with chlorine to produce?

What are some examples of not all liquid's evaporating at the same rate?

Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen?

Which expression represents the ΔH for a chemical reaction in terms of the potential energy, PE, of its products and reactants?