3.Use this equation to answer the questions below: Br2 + Cl2 → 2BrCl. a. How many grams of BrCl form when 318.5 g Cl2 react with excess Br2?

c. How many grams of Br2 are needed to react with 3.36 × 1025 molecules Cl2?

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why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.