Two chemical reactions are shown: 2Mg + O2 → 2MgO
CaCO3 → CaO + CO2
Which statement is true? (5 points)

a
Both are synthesis reactions.

b
Both are decomposition reactions.

c
A is a synthesis reaction, and B is a decomposition reaction.

d
A is a decomposition reaction, and B is a synthesis reaction.

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates

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? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.

What is the mass of 0.750 mole of aluminum oxide, al2o3?