Which type of bond results when one or more valence electrons are transferred from one atom to another?

(1) a hydrogen bond

(2) an ionic bond

(3) a nonpolar covalent bond

(4) a polar covalent bond

Determine how many moles of hydrogen are needed to produce 50 grams of ammonia.

Identify each of the following as either a physical change or a chemical change. Explain your answers. A. a piece of wood is sawed in half. B. milk turns sour. C. melted butter solidifies in the refrigerator.

A student measures the mass of a metal bar as 57.21 g. the student fills a graduated cylinder with water and determines the volume of water to be 53.70 mL. The student places the metal bar into the graduated cylinder and records the new volume as 58.

How many grams are in 0.572 moles of glucose, C6H12O6

Calculate the molar mass of the following compounds in g/mol. CH3CO2H

Before a race, an athlete warms up by jogging around the track shown below at a constant rate of 2.3 m/s. What statement best describes his motion as he jogs around the curved part of the track?

What physical property is changed when a waitress pours coffee from a pot into four mugs? temperature density volume color

Calcule o calor especifico do estanho sabendo que foram necessarias 100 cal para elevar em 20ºC a temperatura de 100 g de estanho

What's the smallest part of a compound

The inertness of the noble gases is due to a. the outermost shell has six electrons. b. the bonds they form with other elements. c. the number of protons and neutrons. d.