Answer:
Acids have a pH less than 7. Acids contain lots of hydrogen ions
Alkalis have a pH greater than 7. Alkalis contain lots of hydroxide ions
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Malleability described the property of physical deformation under some compressive stress; a malleable material could, for example, be hammered into thin sheets. Malleability is generally a property of metallic elements: The atoms of elemental metals in the solid state are held together by a sea of indistinguishable, delocalized electrons. This also partially accounts for the generally high electrical and thermal conductivity of metals.
In any case, only one of the elements listed here is a metal, and that’s copper. Moreover, the other elements (hydrogen, neon, and nitrogen) are gases under standard conditions, and so their malleability wouldn’t even be a sensible consideration.
Fraction that’s my eheissooakiss
The working equation for this is written below:
E° = 0.0592logK/n
So, we have to know the value of n first which represents the number of moles electron in the reaction. We cannot answer this because we are not given with the reaction. However, just suppose the reaction is:
Cu⁺ + 2e⁻ --> Cu
Then, n=2. Continuing,
E° = 0.0592log(6.47×10⁵)/2 =<em> 0.172 V</em>
