Only number 3 please

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction

Chortling is used to clean water. another possible atom that would also work is a. sodium b. sulfur c. bromine

In ccl4 is there a certain length that the main atom carbon is a certain distance from the chlorine’s?