Consider sodium oxide, Na2O. Choose the best explanation for the subscript, 2, from the list provided.

What determines how many bond an atom will form?

Is Helium a compound, element, or. mixture

8. What is the molecular formula of a compound if 0.50 moles of it contains 0.50 moles of Strontium, 35.5 grams of chlorine and 1.81 x 1024 atoms of oxygen?

Which of the following would require the largest volume of 0.100 M sodium hydroxide solution for neutralization?: (A) 20.0 mL of 0.0500 M nitric acid (B) 15.0 mL of 0.0500 M hydrobromic acid (C) 5.0 mL of 0.0100 M sulfuric acid (D) 10.0 mL of 0.

The Earth's mantle is A. hotter than the crust but cooler than the core. B. hotter than both the crust and the core. C. cooler than both the crust and the core. D. cooler than the crust but hotter than the core.

What are the properties of all metals

What happens when carbon dioxide at 74°C is placed in thermal contact with water at 14°C? Energy leaves the carbon dioxide and enters the water. The water gets hotter than the carbon dioxide. The temperatures of the two substances equalize.

What scientific knowledge was necessary for Kroto, Smalley, and Curl to discover buckyballs? Check all that apply. All matter is made of atoms. Atoms bond together in certain ways. Carbon atoms have a specific mass.

A 20.0 ml sample of 0.150 m ethylamine is titrated with 0.0981 m hcl. what is the ph after the addition of 5.0 ml of hcl? for ethylamine, pkb = 3.25

1. An atom that has an outer shell that is NOT full is (more likely OR less likely) to be reactive than an atom that has a full outer shell.