What causes lightning?

a) thunder

b) an electric discharge

c) rising warm air

d) air masses meeting

How does fluorine react with ethene?

If 0.492 moles of a substance weighs 56.2 g, what is the molar mass of the substance in units of g/mol?

Which element is always present in a combustion reaction?

In chemistry to be classified as an organic substance a substance must contain?

Why is copper so widely sought on the world market?

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?