Sulfur and magnesium both have two valence electrons.

a. True

b. False

The number of polar covalent bonds in NH₃ is?

Which of the mole ratios would be used to set up the below problem? How many liters of ammonia gas (NH3), can be formed from 54.

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of NaCl solute needed to prepare 275.

Which of the following is NOT an assumption of the kinetic theory of gases?

What are the three main groups in the periodic table

Calculate the coulombic force (in Newtons) felt by an electron and a proton separated by a distance of 1 angstrom. An angstrom is 10-10 meters.

Why does stirring increase the rate of dissolution? A. Stirring the solution decreases the kinetic energy of the solution. B. Stirring the solution increases the surface area of the solution. C.

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09

When The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper