4. Write a chemical formula for a compound that has two atoms of oxygen (0) and

three atoms of iron (Fe).

Which of the following is a Brønsted-Lowry base? A - HCl B - HCO C - H3O+ D - H3PO4

Which of the following is an oxidation-reduction reaction? SO2 (g) + H2O (l) H2SO3 (aq) CaCO3 (s) CaO (s) + CO2 (g) Ca (OH) 2 (s) + H2CO3 (l) CaCO3 (aq) + 2H2O (l) C6H12O6 (s) + 6O2 (g) 6CO2 (g) + 6H2O (l)

What is strontiums ion charge?

What do you think happens to the length of time it takes the planets to orbit the sun as they get further away? Explain answer.

What diffuses more quickly: tetracarbon decahydride (C4H10) or iodine (12) ? By how much?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction