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maria [59]
3 years ago
11

Which gas diffuses most rapidly when they are all at the same temperature and pressure? He, O2, NH3, H2S, or They all diffuse at

the same rate at the same temperature.
Chemistry
1 answer:
Sonbull [250]3 years ago
4 0

Answer:

He

Explanation:

From Graham's law of diffusion, lighter or less dense gas tends to diffuse faster than denser gas amongst the list, He is the lightest gas and so will diffuse faster

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4 0
3 years ago
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A 5.024 mg sample of an unknown organic molecule containing carbon, hydrogen, and nitrogen only was burned and yielded 13.90 mg
Dafna1 [17]

Answer:

C8H17N

Explanation:

Mass of the unknown compound = 5.024 mg

Mass of CO2 = 13.90 mg

Mass of H2O = 6.048 mg

Next, we shall determine the mass of carbon, hydrogen and nitrogen present in the compound. This is illustrated below:

For carbon, C:

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Mass of C = 12/44 x 13.90 = 3.791 mg

For hydrogen, H:

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H = 2/18 x 6.048 = 0.672 mg

For nitrogen, N:

Mass N = mass of unknown – (mass of C + mass of H)

Mass of N = 5.024 – (3.791 + 0.672)

Mass of N = 0.561 mg

Now, we can obtain the empirical formula for the compound as follow:

C = 3.791 mg

H = 0.672 mg

N = 0.561 mg

Divide each by their molar mass

C = 3.791 / 12 = 0.316

H = 0.672 / 1 = 0.672

N = 0.561 / 14 = 0.040

Divide by the smallest

C = 0.316 / 0.04 = 8

H = 0.672 / 0.04 = 17

N = 0.040 / 0.04 = 1

Therefore, the empirical formula for the compound is C8H17N

8 0
3 years ago
A sample of grape juice has a hydroxide ion concentration of 1.4 × 10-10 M.
vodka [1.7K]
<span>grape juice
pOH = -log[1.4*10⁻¹⁰]</span>≈9.6
pH=14-pOH=14-9.6=4.4

orange juce
pH= -log[1.8*10⁻⁴]=3.7

Orange juice has lower pH, so it is more acidic. 
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3 years ago
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mario62 [17]
I think this is your answer

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3 years ago
Quantization of energy lab Hypothesis: Make a prediction that describes the relationship between the composition of an unknown s
elixir [45]

Answer:

If each element can be identified by its spectrum then the composition of an unknown star can be determined

Explanation:

The chemical nature of the elements is that they absorb specific wavelength of light depending on their atom. By spectral analysis of the spectrum of emitted light by a body, the body's composition can therefore be determined. As such in order to determine the composition of distant bodies such as planets, stars and other celestial bodies scientists usually make use of spectroscopy.

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