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Alex Ar [27]
3 years ago
9

2. The atomic number of an atom comes from *

Chemistry
1 answer:
nlexa [21]3 years ago
3 0
C. The number of protons
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Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown
Nata [24]

Answer : The molar mass of unknown gas is, 41 g/mole

Solution : Given,

Diffusion rate of neon gas = 7 cm/s

Diffusion rate of unknown gas = 4.9 cm/s

Molar mass of neon gas = 20 g/mole

According to the Graham's law, the rate of effusion of a gas is inversely proportional to the square root of the molar mass of the gas.

Formula used :

\frac{R_1}{R_2}=\sqrt{\frac{M_2}{M_1}}

where,

R_1 = diffusion rate of neon gas

R_2 = diffusion rate of unknown gas

M_1 = molar mass of neon gas

M_2 = molar mass of unknown gas

Now put all the given values in the above formula, we get the molar mass of unknown gas.

\frac{7cm/s}{4.9cm/s}=\sqrt{\frac{M_2}{20g/mole}}

M_2=40.81g/mole=41g/mole

Therefore, the molar mass of unknown gas is, 41 g/mole

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3 years ago
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What happens during a chemical change??
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Explanation:

In this problem, we are given a conversion factor.

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So, since we know this, we can simply multiply 25 by 6.5 to see what the distance will be.

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Can a tiny organism found in a cave help fight human disease? Explain?
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