How many moles are in 1.2 x 103 grams of ammonia, NH3?

An atom has the following electron configuration. 1s22s22p63s23p4s23d3 How many valence electrons does this atom have?

Aluminum foil is often incorrectly termed tin foil. If the density of tin is 7.28g/cm³, what is the thickness of a piece of tin foil that measures 5.70cm by 4.25cm and has a mass of 0.655g

What are scientific models used for? Give an example of each of the following types of models: Idea, Physical, Compute

What mass of hydrogen is produced when 49.0 grams of sodium reacts with 30.0 grams of water

Mia is researching famous scientists and their contributions to biology, chemistry, and physics. Which of the following scientists developed the current naming system used to classify organisms? A. Mendel B. Darwin C. DeBakey D. Linnaeus

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.