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yuradex [85]
3 years ago
8

The radioactive isotope 238u decays in a series of nuclear reactions that includes another uranium isotope, 234u, and three lead

isotopes, 214pb, 210pb, and 206pb. how many neutrons, protons, and electrons are in each of these five isotopes
Chemistry
1 answer:
cricket20 [7]3 years ago
7 0
The mentioned isotopes are isotopes of elements Uranium (U) and Lead (Pb). The atomic number of U and Pb are 92 and 82, respectively. When an isotope is reported as U-238 for example, 238 is the mass number, which is the sum of the number of protons and neutrons. Since we know the atomic number, we can find the neutrons from the mass number. For the number of electrons, it is equal to the number of protons because it is neutral.

1. U-238
Number of protons: 92
Number of electrons: 92
Number of neutrons: 238 - 92 = 146

2. U-234
Number of protons: 92
Number of electrons: 92
Number of neutrons: 234 - 92 = 142

3. Pb-214
Number of protons: 82
Number of electrons: 82
Number of neutrons: 214 - 82 = 132

4. Pb-210
Number of protons: 82
Number of electrons: 82
Number of neutrons: 210 - 82 = 128

5. Pb-206
Number of protons: 82
Number of electrons: 82
Number of neutrons: 206 - 82 = 124
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H2SO3 or sulfurous acid is actually a strong acid. We know for a fact that strong acids completely dissociate into its component ions in a solution, that is:

 

<span>H2SO3 -->  2H+  +  SO3-</span>

 

<span>So from the equation above, there are 2 moles of H+</span>

8 0
3 years ago
What are the products of a neutralization reaction?
vfiekz [6]
In an acid and base neutralization reaction, the products are salt and water.
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Why are large differences in temperature between the wet bulb and dry bulb thermometers are possible only at higher temperatures
photoshop1234 [79]

Answer:

At constant vapor pressure, the relative humidity decreases as the temperature increases, therefore, at higher temperature the relative humidity is low and water readily evaporates from the wet bulb thermometer that results in the cooling of the bulb such that at a given ambient temperature the very low relative humidity results in very large differences between the temperatures of the wet bulb thermometer and that of the dry bulb thermometer and the wet bulb is observed to be the colder thermometer of the two

Explanation:

8 0
3 years ago
Mercury has a density of 13.6 g/mL. How many milliliters of mercury have a mass of 350 g? *
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solution:

density x volume=mass volume x volume

13.6gml x 3.55ml

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7 0
3 years ago
At constant pressure and 25^0C , a sample of gas occupies 4.5lit. at what temperature will the gas occupy 9.0lit.​
olga55 [171]

Answer:

Final temperature = 149 K

Explanation:

Given data:

Initial temperature = 25°C (25+273 = 298 K)

Initial volume = 4.5 L

Final temperature = ?

Final volume = 9.0 L

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁  

T₂ = 4.5 L × 298 K / 9.0 L

T₂ = 1341 L K / 9.0L

T₂ = 149 K

4 0
3 years ago
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