The solution is basic because anything any above 7 is basic. 7 is neutral. Below 7 is acidic
Answer:
Helium is in the __1__ period. All elements in this period have __8__ shells around the nucleus. Also giving brainiest :)
The empirical formula : CaAsO₄H
<h3>Further explanation
</h3>
The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
- Determine the mass ratio of the constituent elements of the compound.
- Determine the mole ratio by by dividing the percentage by the atomic mass
Divide by the smallest ratio(0.555) :
Ca : As : O : H ⇒
Answer:
Balanced half-reaction: Au⁺(aq) → Au³⁺(aq) + 2e⁻.
Gold lost two electrons and change oxidation number from +1 to +3.