Molecules involved in a chemical reaction must meet to react. What is this concept called?

Enthalpy

Collision theory

Enthropy

Reaction rate

The burning of coal, a fossil fuel, produces water and carbon dioxide. How is this similar to cellular respiration? A) Both require high temperatures. B) Heat energy is lost in both cases. Eliminate C) Both involve the breakdown of carbon compounds.

Why do you think adding water (dilution) changes how acidic or basic the liquid is? Explain your thinking.

Calculate the volume of a gas with a pressure of 100 kPa, if its volume at 120 kPa is 1.50 L.

Why is the melting of ice a physical change?

What are some interesting facts about Dmitri Mendeleev?

how many grams of silver chloride are produced when 45 g of calcium chloride react with excess silver nitrate?

The atoms 14N7, 15N7 and 16N7 are? A same in p B different in n C same in e D isotopes E all of these

Which temperature represents the highest average kinetic energy of the particles in a sample of matter? A) 298 K B) 267 K C) 27 degrees Celsius D) 12 degrees Celsius

Give me the summary of the movie "interstellar" in your own words.

The discovery of the sixth quark was accomplished by