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Rom4ik [11]
3 years ago
12

The metal zirconium becomes superconducting at temperatures below 546 mk. Calculate the temperature at which zirconium becomes s

uperconducting in degrees Celsius. Round your answer to 3 decimal places.
Chemistry
1 answer:
4vir4ik [10]3 years ago
4 0

Answer:

-272.604 °C

Explanation:

The metals can conduct electricity, but this conduction has some resistance, and there're dissipations in the energy during the conduction. Some material has the ability, at very low temperatures, to conduce electricity without the resistance. This ability is called superconducting.

The mK corresponds to the miliKevin, and 1 K = 1000 mK, thus, the temperature in Kevin is 0.546 K.

T(K) = T(°C) + 273.15

T(°C) = T(K) - 273.15

T(°C) = 0.546 - 273.15

T(°C) = -272.604 °C

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ankoles [38]

Answer:

When nitric acid combine with sodium hydroxide the salt formed is called sodium nitrate. option B

Explanation:

It is the strong acid strong base reaction. When acid and base react with each other salt and water are formed.

In given reaction  nitric acid combine with sodium hydroxide base and form sodium nitrate salt and water.

Chemical equation:

HNO₃(aq) + NaOH(aq)       →      NaNO₃(aq) + H₂O(l)

Ionic equation:

H⁺NO₃⁻(aq) + Na⁺OH⁻(aq)       →      Na⁺NO₃⁻(aq) + H₂O(l)

Net ionic equation:

H⁺(aq) + OH⁻(aq)   →   H₂O(l)

The Na⁺(aq) and NO₃⁻(aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

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3 years ago
What kind of oxide is formed when a piece of sodium is dropped in the water
aleksley [76]

Answer:

Sodium oxide is the product

Explanation:

4Na+O2->2Na2O

7 0
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KATRIN_1 [288]
I think the answer is 15
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Explanation:

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serg [7]

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It is the last one.

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