What does the number on the top left of the symbol show?

Can atoms be created or destroyed during a chemical reaction?

Suppose you increase the mass of wood you are burning in a fireplace. what will happen to the total mass of ash what will happen to the total mass of ash, gases, and water vapor

Suppose you place an ice cube into a cup of hot tea? What will happen to the temperature of the ice cube and the tea? A) The temperature of the ice will increase quickly, while the temperature of the tea will drop slowly.

What is a chemical equilibrium?

What state of matter is achieved if a large amount of energy is added to a gas? vapor liquid plasma solid

A certain ore is 34.4% nickel by mass. How many kilograms of this ore would need to dig up to have 30.0g of nickel?

Are the chemical reactions that take place when a battery connected endothermic or exothermic

What are 3 properties of carbon?

A (1. pathogen 2. Germ 3. Bacterium) is an agent that causes disease. All (1. bacteria 2. fungi 3. Viruses) are pathogens.

Calculate the solubility (in g/l) of calcium fluoride in water at 25°c if the ksp for caf2 is 1.5 * 10-10.