The minimum amount of energy that has to be added to start a reaction is the

a. exothermic energy.

b. endothermic energy.

c. activation energy.

d. chemical energy.

What is the process of determining the volume of an irregular solid called?

Question. What gas caused the change to the appearance of limewater?

Where do you find elements grouped that have the most similar physical and chemical properties? left side of the table horizontal periods O in vertical groups or families Oright side of the table

Rank the following compounds in order of increasing acidity. A: h5ch17p19b1 B: h5ch17p19a1 C: h5ch17p19c1

A 0.72 mg sample of phosphorus reacts with bromine to form 10.01 mg of the bromide. part a what is the empirical formula of the phosphorus bromide

Ions that consist of a single atom are called ... ions

Ecosystems are clearly separated from one another. Where one ecosystem stops, another begins A: True B: False

Mass_mole relationship

What is the momentum of an 800-kg car | traveling at a velocity of 10 m/s? What is its momentum if it speeds up to 50 m/s?

How many grams of CuSO4 are there in 100.0 g of hydrate? How many moles?