The energy needed to get a reaction started is the

a. enzyme energy.

b. activation energy.

c. catalyst energy.

d. chemical energy.

Equal molar quantities of gases abc and d are put into an evacuated flask. The pressure of the sample is measured as 160. kPA. The pressure of gas C is

What is a chemical equilibrium?

Explain What makes the rock cycle a cycle?

Which of the following could result from a substance that undergoes a physical change? A. It changes irreversibly. B. It undergoes phase change. C. It's elements composition is altered. D. its atoms rearrange to form a new molecule.

What is the formula for barium nitride trihydrate

Which of the following is the best indication that a chemical change has taken place? a. The matter changes color. b. A mixture separates into layers. c. The change is reversible. d. The shape of the substance changes.

This is not lost in a chemical Reaction (4 letter word second letter is A)

Which type of soil holds the least water

Eq-43 which type of fire extinguisher should be onboard a vessel with a permanently installed fuel tank

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below