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3 years ago

What is metal's I need answer

Chemistry

1 answer:

katrin [286]3 years ago

5 0

Answer:

objects thaty release 0H+ and H- ions when dissociated

Explanation:

in chemistry

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A patient arrives in the emergency with a burn caused by steam. Calculate the heat that released when 17.7 g of steam

MaRussiya [10]

The steam releases 39.9 kJ when it condenses..

The steam condenses and transfers its energy to the skin.

<em>q = m</em>Δ<em>H</em>_cond = 17.7 g × (-2257 J/1 g) = -39 900 kJ = -39.9 kJ

The negative sign shows that the steam is releasing energy

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4 years ago

Is sodium element a metal nonmetal or metalloid

gladu [14]

Sodium Na is a metal that belong to the alkali metal with low density and soft

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3 years ago

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You examine an ice core sample from 10,000 years ago when global temperatures were unusually high. Based upon past studies and i

Tom [10]

Methane was unusually high is the correct option. Hence, option B is correct.

<h3>What is methane?</h3>

Methane is the simplest member of the paraffin series of hydrocarbons and is among the most potent greenhouse gases. Its chemical formula is $CH_4$ .

As the ice compacts over some time, tiny bubbles of the atmosphere or surroundings including greenhouse gases like carbon dioxide and methane—press inside the ice. These air pocket “fossils” give samples of what the atmosphere was kind when that layer of ice formed.

Based upon past studies and insights from current GHG levels, we assume that atmospheric levels of carbon dioxide and methane were unusually low.

Learn more about methane here:

brainly.com/question/2127750

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2 years ago

Help please <br> Cu + S CuS

SCORPION-xisa [38]

Answer:

Hi.. U should do like this

Cu + S - - - >Cu2S

6 0

3 years ago

The__ model assigns to fixed orbits of defined energy. To move between orbits, electrons must emit or absorb _____ radiation

AURORKA [14]

Answer:

The Bohr model assigns to fixed orbits of defined energy. To move between orbits, electrons must emit or absorb electromagnetic radiation

Explanation:

In the Bohr model of the atom, the atom itself looks like a solar system.

In fact, at the center of the atom we have the nucleus, which contains protons and neutrons.

Around the nucleus, at a much higher distance, we have the electrons, negatively charged. The electrons move around the nucleus in fixed orbits, like the planets around the Sun.

According to Bohr's model, the electrons cannot live in the space between two orbits, but they must stay in one of these orbits. Each of these orbits is associated to a certain energy level: therefore, this means that the energies of the electrons in an atom are quantized, so they cannot take all possible values, but only some precise values.

Moreover, according to the law of conservation of energy:

- When an electron jumps from a lower energy level to a higher energy level, it must absorbs energy, and this energy is absorbed in the form of electromagnetic radiation (a photon) whose energy is equal to the difference in energy between the two levels

- SImilarly, when an electron jumps from a higher energy level to a lower energy level, it releases energy, in the form of electromagnetic radiation (a photon) whose energy is equal to the difference in energy between the two levels.

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3 years ago

What is metal's I need answer ​

What is metal's I need answer