What is one result of a chemical change?

A. Energy is created.

B. A new material is formed.

C. Materials change from one state to another.

D. Elements are permanently destroyed.

If we removed the producers from this food web, how would it affect the balance of the ecosystem? There would be a decrease in consumers and decomposers. There would be an increase in primary consumers and a decrease in secondary consumers.

Which one of these factors most affects colligative properties of solutions? A) density B) luster C) molarity D) volume

A 5.00 L evacuated flask is filled with 1.86 moles NOBr. After equilibrium is established at 298 K, it is found that there are 0.082 moles of bromine gas present. Determine Kc and amp for the reaction.

You carefully weigh out 20.00 g of CaCO3 powder and add it to 81.00 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g. The relevant equation is:

In a double-replacement reaction, one of the products

Consider a triprotic acid like phosphoric acid or citric acid. which expression correctly describes the relative magnitudes of the three ka equilibrium constants?

If 14g of ethene reacts with excess amount of steam to give 17.25g of ethanol what is the percentage yield

The electrical conductivity of an aqueous solution depends on the concentration of which particle in the solution

What changes in physical properties can be used as evidence that a chemical reaction has occured?

What distance is travled by a police car that moves at a constant speed of 1.5 km/min for 5.0 min?