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grandymaker [24]
3 years ago
13

IIIIIIII NEEEEEEEEEEEDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD HEEEEELPPPPPPPPPPPPPP

Chemistry
1 answer:
tensa zangetsu [6.8K]3 years ago
7 0

Answer:

A

Explanation:

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Which of the following elements does NOT form a diatomic molecule?
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Magnesium(Mg) does not forms diatomic molecules.
The name of the compound CuCl2 is copper(ll)chloride.
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the heat from the universe during the big bang

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39. Which of the following conversion factors would you use to change 18 kilometers to meters?
Vikki [24]

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6 0
3 years ago
Calculate the value of the diffusion coefficient D (in m2/s) at 547°C for the diffusion of some species in a metal; assume that
svetlana [45]

Answer : The value of diffusion coefficient is, 2.97\times 10^{-16}m^2/s

Explanation :

Formula used :

D=D_o\times \exp \left(-\frac{Q_d}{RT}\right )

where,

D = diffusion coefficient = ?

D_o = 5.6\times 10^{-5}m^2/s

Q_d = 177kJ/mol

R = gas constant = 8.314 J/mol.K

T = temperature = 547^oC=273+547=820K

Now put all the given values in the above formula, we get:

D=5.6\times 10^{-5}m^2/s\times \exp \left(-\frac{177kJ/mol}{(8.314J/mol.K)\times (820K)}\right )

D=2.97\times 10^{-16}m^2/s

Thus, the value of diffusion coefficient is, 2.97\times 10^{-16}m^2/s

6 0
3 years ago
Which statement best describes the oxidation numbers of the atoms found in magnesium chloride
bearhunter [10]
It has two elements.

Magnesium shows +2and Cl shows -1.
7 0
4 years ago
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