What type of bond will result if the atoms below combine? The electro negativity of each atom is given

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

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.