Chemistry ? ? 1) in the following equation, which element has been reduced? 2) in the following equation, which element had been oxidized? // questions and question choices attached

Q 1.  The Iron ion (FE+++) has gained electrons to become metallic Iron Fe.

The Iron (Fe) has been reduced.

Q 2  Oxidation is the loss of electrons . Here the Al loses 3 electrons to give Al+++.

Al has bee oxidised.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally