Answer:
20
Explanation:
In a neutral atom, the number of protons (p) equals the number of
electrons (e).
p = e
e = 19, so
p = 19
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The <em>mass numbe</em>r (A) is the number of protons plus the number of
neutrons (n).
A = p + n
A = 39, so
39 = 19 + n Subtract 20 from each side.
n = 20
The atom has 20 neutrons.
I believe the answer you are looking for is conduction
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There are 8 total hydrogen (H) atoms.
It would be 0.341 because if you add 0.229 and 0.112 it will be 0.341
The rate of effusion of ammonia (NH₃) in the same apparatus is 63.3 cm/min
<h3>Graham's law of diffusion </h3>
This states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e
R ∝ 1/ √M
R₁/R₂ = √(M₂/M₁)
<h3>How to determine the rate of ammonia (NH₃) </h3>
- Rate of HCl (R₁) = 43.2 cm/min
- Molar mass of HCl (M₁) = 1 + 35.5 = 36.5 g/mol
- Molar mass of NH₃ (M₂) = 14 + (3×1) = 17 g/mol
R₁/R₂ = √(M₂/M₁)
43.2 / R₂ = √(17 / 36.5)
Cross multiply
43.2 = R₂ × √(17 / 36.5)
Divide both side by √(17 / 36.5)
R₂ = 43.2 / √(17 / 36.5)
R₂ = 63.3 cm/min
Thus, the rate of effusion of ammonia is 63.3 cm/min
Learn more about Graham's law of diffusion:
brainly.com/question/14004529