Which of these reactions is an addition reaction? H4C2 + Br2 →H5C2Br + HBr
OH4C2 + HBr +H5C2Br
OH5C2CI + NaOH → H5C20H + NaCl

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?