When a writer uses "common knowledge" in an essay, why does it NOT require a citation nor is it considered plagiarism?

Apply the theory to Distinguish between solid liquid and gas

What is the volume of one mole of any gass at STP?

Each small square on the periodic table of elements represents a different what does each square on the periodic table of elements represent

Braddy connected the lose wire to the battery and created an electromagnet. He picked up 45 thumb tacks with his electromagnet, though his goal was to pick up 50 thumb tacks.

Are phosphorous and oxygen covalently or ionically bonded?

What was concluded about the structure of the atom as the result of the gold foil experiment? (1) A positively charged nucleus is surrounded by positively charged particles. (2) A positively charged nucleus is surrounded by mostly empty space.

Andre is predicting the products of chemical reactions. In one reaction, a hydrocarbon is the only reactant. What is the best prediction and explanation of this reaction? Two new compounds form as the hydrocarbon undergoes a synthesis reaction.

What evidence is there that electrons move around in definite pathways around the nucleus? What evidence is there that electrons m

Are greenhouse gases good for us?

How to convert metric units?