Which of the following Group 2 elements has the lowest first ionization energy?

(1) Be (3) Ca

(2) Mg (4) Ba

What is the predominant intermolecular force between ibr molecules in liquid ibr?

Which gas is formed when any metal carbonate reacts with any acids? A) oxygen B) carbon dioxide C) hydrogen D) methane

What might have caused this canyon to form? A) winds blowing in zig-zag way B) frequent earthquakes in the area C) water breaking the rocks into pieces D) heavy rainfall flooding the part of the land

A mixture consisting of 0.250 M N2 (g) and 0.500 M H2 (g) reaches equilibrium according to the equation N2 (g) + 3 H2 (g) → 2 NH3 (g). At equilibrium, the concentration of ammonia is 0.150 M. Calculate the concentration of N2 (g) at equilibrium. A.

A 5.63 g sample of solid gold is heated from 21.0 ºC to 32.0 ºC. How much energy (in J and cal) is required?

Which substance is the oxidizing agent in this reaction? 2CuO+C→2Cu+CO2 Express your answer as a chemical formula.

Why does the light bulbs have to be part of the loop in order for it to be succesful?

Which best describes the transition from gas to liquid? Energy must be removed because particles in liquid move more slowly. Energy must be added because particles in liquid move more quickly.

Calculate the mass of a 0.255-ml sample of a liquid with density 0.660 g/ml.

Which statement correctly describes the interaction between magnetic poles? North and south poles attract each other. North and south poles repel each other. Two north poles will attract each other. Two south poles will attract each other.