Which is the number placed in front of an element's symbol in a chemical formula?

There are many lewis structures you could draw for sulfuric acid, h2so4 (each h is bonded to an o). part a what lewis structure (s) would you draw to satisfy the octet rule?

Crude oil is a mixture of many compounds that can be separated using which process

Suppose a solution is described as concentrated. Which of the following statements can be concluded? Select the correct answer below: Question 4 options: The solution is supersaturated. The solution is not supersaturated. The solute is insoluble.

If the valence electrons were removed, what would be the ion charge of the element? Al

A 125 mL bubble of hot gases at 213 ∘C and 1.77 atm is emitted from an active volcano. Part A What is the final temperature, in degrees Celsius, of the gas in the bubble outside the volcano if the final volume of the bubble is 136 mL and the

What happens to the volume of a substance as temperatures rises?

Find the total number of atoms in a sample of cocaine hydrochloride, c17h22clno4, of mass 22.5 mg.

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction

What is the valence of Fluorine

When liquid helium is exposed to room temperature, it forms a gas. Which best explains why this happens? The liquid helium absorbs energy from the air in the room. The particles in the air absorb the energy of the liquid helium.