Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn for the equation C2H4(g)+HBr(g)⟶C2H5Br(g)

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.