Which of these can be classified as a substance A) oxygen B) carbon dioxide C) air D) acid rain

Empirical formula for C2H6O4

How do you find the concentration of a solution

Why is gold usually found in its pure form

Which of the following elements would be predicted to be the best conductor of electricity? sodium (Na) germanium (Ge) sulfur (S) neon (Ne)

Both hydrogen sulfide and ammonia have strong, unpleasant odors. which gas had the higher effusion rate? if you opened a container of each gas in a corner of a large room, which odor would you detect first on the other side of the room?

How many moles of aluminum do 5.6*1024 aluminum atoms represent? express your answer using two significant figures?

What is the most accurate description of compounds?

A researcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increases.

If you have three moles of S2, how many moles of Al2S3 can be produced?

Predict whether each of the following reactions will occur in aqueous solutions. Explain your reasoning in each case. Note: Barium sulfate and silver bromide precipitate in aqueous solutions.