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 reaction?...................................................................K2Cr2O7 + 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