3 years ago

What is the average mass of an electron? A. 1 amu B. 1,837 amu C. 1/1,837

Chemistry

1 answer:

diamong [38]3 years ago

3 0

Answer:

C. 1/1,837

Explanation:

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D) It has a different unit than atomic mass.

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3 years ago

What mass of hydrogen is required to react with 24.7 g of nitrogen?

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Answer:

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How is 0.00036 written in scientific notation?

natta225 [31]

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3 years ago

What is the mean free path for the molecules in an ideal gas when the pressure is 100 kPa and the temperature is 300 K given tha

sladkih [1.3K]

Answer:

The mean free path = 2.16*10^-6 m

Explanation:

Given:

Pressure of gas P = 100 kPa

Temperature T = 300 K

collision cross section, σ = 2.0*10^-20 m2

Boltzmann constant, k = 1.38*10^-23 J/K

To determine:

The mean free path, λ

Calculation:

The mean free path is related to the collision cross section by the following equation:

$\lambda =\frac{1}{n\sigma }------(1)$

where n = number density

$n = \frac{P}{kT}-----(2)$

Substituting for P, k and T in equation (2) gives:

$n = \frac{100,000 Pa}{1.38*10^{-23} J/K*300K} =2.42*10^{25}\ m^{3}$

Next, substituting for n and σ in equation (1) gives:

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3 years ago