Answer:
Reaction a: chemical, reaction b: nuclear
Explanation:
Remember that a conjugate acid-base pair will differ only by one proton.
None of the options you listed are conjugate acid-base pairs as none of them differ only by one proton (or H⁺)
An example of a conjugate acid-base pair would be NH₃ and NH₄⁺NH₃ + H₂O --> NH₄⁺ + OH⁻NH3 is the base, and NH₄⁺ is the conjugate acid
Answer:
62.3 moles of Ca
Explanation:
1 mole of a substance is defined as 6.022x10²³ particles of this substance. For example:
1mol of electrons = 6.022x10²³electrons
1mol of atoms = 6.022x10²³atoms
1 mol of molecules = 6.022x10²³ molecules
And 1mol of atoms of Ca = 6.022x10²³ atoms of Ca
That means 3.75x10²⁵ atoms of Ca are:
3.75x10²⁵ atoms of Ca * (1 mole of Ca / 6.022x10²³ atoms) =
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62.3 moles of Ca
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