What is a symbol?

A. a repeated element

B. a message or main idea

C. something that is used to stand for something else

D. the main idea

How many grams of sodium carbonate would be required to produce 85.0 g of barium carbonate? (the molar mass of Na2CO3 is 106 g per mole, and the molar mass of BaCO3 is 197 grams per mole)

Cuales son las reservas de petróleo en argentina?

Zinc is a pure substance. How could you make a mixture from a 1.0-g zinc disc? A) Place the disc in a beaker with 200 mL of sulfuric acid. B) Divide the disc into 5 small pieces. C) Compress the disc into a flatter shape.

Identify examples of the list below. Check all that apply

A 0.050 M aqueous solution of which compound is the best conductor of electric current

The activation energy of a chemical reaction is the energy that

Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power?

Generally, when going down a group on the periodic table: atomic radii decrease ionic radii increase electronegativity increases reactivity decreases

Predict: What element would result from the beta decay of Bromine?

How many carbon atoms are present in 1.84 moles of C2H6O?