I just need some quick help with these 2 test questions (timed)

What overall charge must all compounds have

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)