When 6.25 grams of pure iron are allowed to react with oxygen, a black oxide forms. if the product weighs 8.15g, what is the empirical formula of the oxide?

Progesterone is a hormone that contains two ketone groups. The oxygen in the ketone group can function as a hydrogen bond acceptor. Select the amino acids that have side chains that can form a hydrogen bond with progesterone at pH 7. a. threonine. b.

Discuss the distribution of earthquakes and volcanoes in relation to the crustal plates. Are they scattered all over the plates or is there a pattern? Describe.

Which of the molecule is a major contributor to acid rain? A. SO₂ B. SiH₄ C. CO₂ D. CaO E. NO

Which of the following best describes what causes water molecules to exhibit properties such as cohesive and adhesive behavior? A. Water molecules are polar, having partially positive and partially negative ends. B.

Why does the bottom of the boat appear to be longer than the top of the boat

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom