The number of grams of bromine that will completely react with 5 g of pentene is: [Atomic mass of Br =80 u ]

Step-by-step solution

The chemical formula for pentene is C₅H₁₀ . The reaction of pentene with bromine is an addition reaction: C₅H₁₀ + Br₂ C₅H₁₀Br₂ The molar mass of pentene ( C₅H₁₀ ) is 5 12 + 10 1 = 70 g/mol. The molar mass of bromine ( Br₂ ) is 2 80 = 160 g/mol. From the stoichiometry of the reaction, 1 mole of pentene reacts with 1 mole of bromine. Therefore, 70 g of pentene reacts with 160 g of bromine. For 5 g of pentene, the mass of bromine required is: Mass of Br₂ = 160 70 5 = 800 70 = 80 7 11.428 g. Rounding to the nearest pro