How many moles of electrons are required to reduce one mole of bromine gas (Br2) to two moles of bromide ions (Br-) ? 1 e - 2 e - 3 e - 4 e-

The chemical equation below shows the burning of magnesium with oxygen to form magnesium oxide 2Mg + 02 - - > 2MgO the molar mass of O2 is 32.0g/mol. what mass, in grams, of O2, is required to react completely with 4.00 mol of Mg? a. 2.00 b. 64.0 c.

How can stability and toxicity work together to increase the effects of a chemical on the environment?

Magnesium reacts with hydrochloric acid, hcl, to produce hydrogen gas (hint: a diatomic molecule) and magnesium chloride. write a balanced equation for this reaction.

If the density of gold is 19.3 g/cm3 what would be the volume of 550 g of gold?

Which of the following is a difference between electromagnetic waves and sound waves?

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which of the following account for this difference? a. Hydrogen has stronger intermolecular forces than chloromethane. b.

Magnesium burns with a very bright light. When the flame goes out, a White powder is left behind. what is the word equation for this reaction.

Identify the types of intermolecular forces found for each of the liquids and relate these to the shape of the drop as seen from the side. Include the terms cohesive and adhesive forces properly in your explanations.

Which type of experiment follows ethical standards?

What kind of change occurs when a compound is separated into its components?