Which of the following diatomic molecules is joined by a double covalent bond?

O2

Cl2

N2

He2

What is the law of conservation and what happens when two substances at different temperatures come into contact.

A rigid container (volume cannot change) is filled with carbon dioxide gas at room temperature. The container is then placed in a sub-zero freezer with temperatures around - 40 °C. The amount of gas in the container is fixed and cannot change.

An object has a constant mmass. A constant force on the object produces a constant?

A balloon contains 5470cm3 of gas and has a mass of 10.24g. The mass of the empty balloon is2.42g. What is the density of the gas.

CuCO3 (s) + 2HCl (aq) → CuCl2 (aq) + H2O (l) + CO2 (g). Which statement correctly describes the substances in this reaction? A. Exactly one product and two reactants are either liquid or dissolved in water. B.

Which of the following correctly identifies steps used in the fractional distillation of petroleum? The mixture is cooled, condenses, then heated and boils. The mixture is cooled, boils, then heated and condense.

What is the formula of the most stable oxide of francium?

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.