Answer:
Explanation:
Since the transferred heat is equal to the change in the internal energy, the heat is proportional to the mass of the substance and the temperature change. The transferred heat also depends on the substance so that, for example, the heat necessary to raise the temperature is less for alcohol than for water. Hope that helps!:)
Answer:
pKa = 3.72
Explanation:
Let's consider the dissociation of a generic monoprotic weak acid.
HA(aq) ⇄ H⁺(aq) + A⁻(aq)
For a weak acid, we can find the value of the acid dissociation constant (Ka) using the following expression:
where,
[H⁺] is the molar concentration of H⁺
Ca is the initial concentration of the acid
First, we need to find [H⁺] from pH.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -2.40 = 3.98 × 10⁻³ M
Then,
Finally,
pKa = -log Ka = -log 1.89 × 10⁻⁴ = 3.72
Answer is: the number of ions produced in the dissociation of aluminium fluoride is 4.
<span>
Chemical dissociation of aluminium fluoride in
water:
AlF</span>₃(aq) →
Al³⁺(aq) + 3F⁻(aq).<span>
There are four ions, one aluminium cation and
three fluoride anions.
Aluminium has oxidation +3, because it lost
three electrons, to have electron configuration as noble gas neon and fluorine has oxidation -1, because it gain one electron to </span>have electron configuration as noble gas neon.
Explanation:
Air borne pollutants are usually very light particles that are usually carried in the air in the atmosphere. Some of these pollutants can be carried far away and some are found close to their sources.
Some of the factors are:
- Wind pressure: if wind pressure is low, pollutants will not be carried far away. In this situation, the particles will be blown and carried over a short distance from their sources. When wind pressure is very high, pollutants will be carried extensively into farther areas.
- Pollutants can be trapped in snow. In a snowy area, when pollutants reach sky high and enters condensed water in the atmosphere, they can become super cooled into ice and fall back within the same area where they are formed.
- Rain water can also cause pollutants to be dispersed within a short area. Pollutants can mix with rain water and carrier back to the area where they were originally formed.
Learn more:
Pollution brainly.com/question/10743354
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9.00g/1hr * 1kg/100g * 1hr/60min = 0.00015kg/min or 1.5 * 10^-4kg/min.