Answer is: concentration of hydronium ions is 8.13·10⁻⁴ M.<span>
c(HNO</span>₂) = 0.055 M.<span>
c(NaNO</span>₂) = 0.10 M.<span>
Ka(HNO</span>₂) = 4.5·10⁻⁴.<span>
This is buffer solution, so use Henderson–Hasselbalch equation:
pH = pKa + log(c(NaNO</span>₂) ÷ c(HNO₂)).<span>
pH = -log(4.5·10</span>⁻⁴) + log(0.055 M ÷ 0.10 M).<span>
pH = 3.35 - 0.26.
pH = 3.09.
</span>[H₃O⁺<span>] = 10</span>∧(-3.09).
[H₃O⁺] = 8.13·10⁻⁴ M.
Explanation:
The nuclear reaction is a radioactive decay by the emission of a beta particle.
Beta emission increases the mass number of a nuclei.
A beta particle is a particle that closely resembles an electron. When a particle decays by emitting beta particles, the mass number remains the same but the atomic number increases.
Beta particle is designated as °₋₁β
²³₁₀ Ne ⇒ ²³₁₁Na + °₋₁β + energy
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Answer:
the Answer is B
Explanation:
If resources are being used faster than they are being replenished, then the species has exceeded its carrying capacity. If this occurs, the population will then decrease in size. Every stable population has one or more factors that limit its growth. A limiting factor determines the carrying capacity for a species.
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Answer:
c. relative age
Explanation:
Relative age is a method of describing the age of rocks based on their order of appearance in the geologic column.
Events are denoted by their position in the column.
- The premise of most of the assumptions used relative age determination is based on stratigraphic laws.
- Absolute age gives numeric ages to rocks.
Since Luisa is comparing the age of people based on their position in her family, she is using the concept of relative dating.
Answer:
0.441 L
Explanation:
At constant pressure, Using Charle's law :-
Given ,
V₁ = 0.500 L
V₂ = ?
T₁ = 25.0 °C
T₂ = -10.0 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (25 + 273.15) K = 298.15 K
T₂ = (-10 + 273.15) K = 263.15 K
Using above equation as:
<u>New volume = 0.441 L</u>
