Calculate the mass of bromine that will react with butene -1 weighing 10 g.

Reaction equation: CH3 = CH-CH2-CH3 + Br2 = Br-CH2-CH (Br) -CH2-CH3

Find the amount of butene-1 substance n (b) = m (b) / M (b), where m (b) and M (b) are the mass and molar mass of butene-1, respectively.

n (b) = 10/56 = 0.18 mol.

The amount of bromine substance n (br) = n (b) (from the reaction equation).

Let us find the mass of bromine m (br) = n (br) * M (br), where M (br) is the molar mass of bromine, M (br) = 160 g / mol.

m (br) = 0.18 * 160 = 28.8 g.