What makes a pure substance different from a heterogeneous mixture? a.) the components of a pure substance are mixed unevenly instead of evenly within the pure substance. b.) insoluble instead of soluble particles are suspended within the pure substance. c.) two liquids that normally are not mixable are mixed in a heterogeneous mixture. d.) the components of a pure substance are single elements or compounds instead of a mixture of compounds.

D.) The components of a pure substance are single elements or compounds instead of a mixture of compounds.

Explanation:

A pure substance is made up of the same type of atoms. An example of a pure substance is an element, which is made up of the same atoms. Gold element is made up of all gold atoms.  

A heterogeneous mixture contains two or more components and each component may or may not be in a different phase. Such in a bowl of salad the lettuce is solid and the dressing is a liquid, so a salad is a heterogeneous mixture.  

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.