Emergency! will mark brainliest

1. in the reaction of beryllium with fluorine, which atom is oxidized?
• fluorine
• beryllium
• neither of them
• both of them
2. ag - - > ag ^+ +1 e^- this equation represents the type of reaction called *
• hydrolysis
• oxidation
• redox
• reduction
what is the reducing agent in the following reaction? 2k + s - - > k2s *
• k
• s
• k2s
• none of the above
what is the oxidation number for each atom in nh4f? *
• n=+3, h=-4, f=+1
• n=-3, h=+1, f=-1
• n=+3, h+1, f=-1
• n=-3, h=-1, f=+1
which atom has a change in oxidation number of +4 in the following redox + h2o + s - - > koh + cr2o3 + so2 *
• k
• cr
• o
• s
what is the reduction half reaction for the following equation: cr2o7^-2 +fe+2 - - > cr^+3 + fe^+3 *
• cr2o7^-2> cr^+3
• fe^+2- - > fe^+3
• fe^+3- - > fe^+2
• cr^+3- -> cr2o7^-2
of the following metals, which ions are most easily reduced? use the above table to answer the question. *
• magnesium
• lead
• copper
• sodium
in a zinc-copper cell, zn(s) | zn^+2(1m) || cu^+2(1m) | cu(s), which electrode is positive?
• cu^+2
• cu(s)
• zn(s)
• zn^+2
what is the standard cell potential of a cell made of theoretical metals ma/ma^+2 and mb/mb^+2 if the reduction potentials are -0.25v and -0.79 v, respectively? *
• +0.54v
• -0.54v
• +1.04 v
• -1.04v