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2 years ago

High-temperature superconducting oxides hold great promise in the utility, transportation, and computer industries.

1 answer:

3 0

The main class of high-temperature superconductors are in the class of copper oxides (only some particular copper oxides) especially the Rare-earth barium copper oxides (REBCOs) such as Yttrium barium copper oxide (YBCO).

<h3>What superconducting material works with the highest temperature?</h3>

As of 2020, the material with the highest accepted superconducting temperature is an extremely pressurized carbonaceous sulfur hydride with a critical transition temperature of +15°C at 267 GPa.

<h3>How do high-temperature superconductors work?</h3>

High-temperature superconductivity, the ability of certain materials to conduct electricity with zero electrical resistance at temperatures above the boiling point of liquid nitrogen, was unexpectedly discovered in copper oxide (cuprate) materials in 1987.

Learn more about high temperature superconductors here:

<h3>brainly.com/question/1657823</h3><h3 /><h3>#SPJ4</h3>

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Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. CaCO3(s) CaO(s) + CO2

romanna [79]

Answer:

$\boxed{\text{10.0 g}}$

Explanation:

The balanced equation is

CaCO₃(s) ⇌ CaO(s) + CO₂(g); Kp = 1.16

Calculate Kc

T= 800 °C = 1073 K; Δn= 1

$K_{\text{p}} = K_{\text{c}}{RT}^{\Delta n}\\\\1.1 = K_{c}{(RT)}^{1}\\\\K_{c} = \dfrac{1.1}{RT} = \dfrac{1.1}{8.314\times 1073}= \dfrac{1.1}{8921} = 1.233 \times 10^{-4}$

Equilibrium concentration of CO₂

$K_{c} = [\text{CO}_{2}] = 1.233 \times 10^{-4}$

Moles of CO₂ formed

$n= \text{5.00 L } \times \dfrac{\text{1.233 $\times$ 10$^{-4}$ \text{ mol} }}{\text{1 L}} = 6.155 \times 10^{-4}\text{ mol}$

Moles of CaCO₃ used up

Moles of CaCO₃ used up = moles of CO₂ formed = 6.155 × 10⁻⁴ mol

Mass of CaCO₃ used up

$m = 6.155 \times 10^{-4}\text{ mol } \times \dfrac{\text{100.09 g}}{\text{1 mol}} = \text{0.0616 g}$

Moles of CaO formed

Moles of CaO formed = moles of CO₂ formed = 6.155 × 10⁻⁴ mol

Mass of CaO formed

$m = 6.155 \times 10^{-4}\text{ mol } \times \dfrac{\text{56.08 g}}{\text{1 mol}} = \text{0.0345 g}$

Mass of solid at equilibrium

m = 10.0 g – 0.0616 g + 0.0345 g = 10.0 g

$\text{The mass of solid remaining at equilibrium is } \boxed{\textbf{10.0 g}}$

6 0

3 years ago

PLEASE HELP!! when elements chemically react, they form compounds by..

atroni [7]

A. Combining all of their electrons together

6 0

3 years ago

A 5 mole sample of liquid acetone is converted to a gas at 75.0°C. If 628 J are required to raise the temperature of the liquid

Shkiper50 [21]

The total energy can be found by adding the different energies:
628 + 15,600 + 712
= 16.94 kJ

4 0

4 years ago

Anyone please help I’m in summer school please

netineya [11]

Answer:

1. Absolute time, also known as Newtonian time is a time that exists independent of the observer of the time, and therefore, can only be expressed through mathematics

Absolute dating is a dating method that makes use of the radioactive property of matter and is determined through dating of radioactive isotopes present

Absolute time (dating) is found through radioactive dating

2. Radioactive isotopes are atoms that have the property of unstable proton neutron combination or excess energy nucleus. They can be fined as unstable element

3. A stabilized isotope are the decay product atoms of the element which are non radioactive.

4. The half life is the time it takes the original isotope to decay into the decay product

5. To determine the age of a rock, the proportion of the original isotope to the amount of decay product in the rock is compared

6. The isotope used to date organic materials is carbon-14

7. The isotope used to date rocks with comparable age to the Earth is Uranium-238 that has a half life of 4.468 billion years

8. The half life of carbon-14 is only 5,700 years while the age of a dinosaur is between 245 and 66 million years ago, and therefore, carbon is absent in most fossils

9. Uranium-238 is only found in igneous or volcanic rocks and not in metamorphic rocks, therefore, fossils of dinosaur as well as other fossils that are buried in sedimentary materials, including sand and clay, cannot be determined by Uranium-238

Explanation:

4 0

3 years ago

An aqueous solution of sodium chloride is best classified as a

ICE Princess25 [194]

Answer:

An aqueous solution of sodium chloride is best classified as homogeneous mixture.

Explanation:

Homogeneous mixture:

In homogeneous mixture solute particles are fully dispersed in solvent. In homogeneous mixture solution is present in liquid phase but the phase of solute and solvent can vary.

For example in case of sodium chloride solution, solid sodium chloride is dissolved in to the solvent i.e water. The partial negative charge of water surrounded the cationic part of sodium chloride i.e (Na⁺) and partial positive part of water surrounded the anionic part of sodium chloride (Cl⁻) in this way sodium chloride is splitted into ions and get dissolved in water and make an homogeneous solution.

4 0

4 years ago