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There are many types of acid or bases. Based on the Arrhenius definition,
* An Arrhenius acid donates H⁺ in a solution (like HCl, HNO₃, H₂SO₄)* An Arrhenius base yield OH⁻ in a solution (like NaOH, KOH, Mg(OH)₂)
Other types of acids and bases are the Lewis acids/bases and the Bronsted-Lowry acids/bases.
Answer:
Alpha radiation
Explanation:
Polonium-212 decays to lead-208 by emission of an alpha particle according to the following equation.
²¹²₈₄ Po →²⁰⁸₈₂ Pb +⁴₂ He + Energy.
Te alpha particle is a helium particle. It has 2 protons and 2 neutrons.
At 20°c, a 0.376 m aqueous solution of ammonium chloride has a density of 1.0045 g/ml. The mass percent of the ammonium chloride in the solution is 2.003%.
The number of moles of a substance can be estimated as:
Given that:
- number of moles = 0.376 M
- molar mass of ammonium chloride = 53.50 g/ml
Mass = number of moles × molar mass
Mass = 0.376 × 53.50
Mass = 20.116 grams
In one mL of ammonium chloride; the grams of ammonium chloride is:
= 0.020116 g/mL
The mass of ammonium chloride in the solution can be computed as:
= 2.003%
Therefore, we can conclude that the mass percent of the ammonium chloride in the solution is 2.003%.
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