Which statement correctly describes a chemical reaction?

1)reactants come out of a reaction.
2)energy is always released.
3)bonds between atoms break and new bonds form.
4)products go into a reaction.

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

What are the two largest greenhouse gases