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3 years ago

In which equation does the oxidation of the underlined compound occur?

Chemistry

1 answer:

zhuklara [117]3 years ago

4 0

Answer:

This is an oxidation-reduction (redox) reaction: 

 2 CuII + 4 e- → 2 Cu0 (reduction) 

 C0 - 4 e- → CIV (oxidation) 

 CuO is an oxidizing agent, C is a reducing agent. 

 cuO – Copper(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02 

Other names: Cupric oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Copper monoxide source: wikidata, accessed: 2019-09-02, Copper oxide source: wikidata, accessed: 2019-09-02

Appearance: Black to brown powder 

C 

Names: Carbon black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Acetylene black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Channel black source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02

Appearance: Odourless black pellets or extremely fine powder source: ICSC, accessed: 2019-09-04; Black, odorless solid. source: NIOSH NPG, accessed: 2019-09-02 

Products:Cu 

Names: Copper source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Copper (dusts and mists, as Cu) source: NIOSH NPG, accessed: 2019-09-02, Cu source: wikidata, accessed: 2019-09-07

Appearance: Solid in various forms. turns green on exposure to moist air source: ICSC, accessed: 2019-09-04; Reddish, lustrous, malleable, odorless solid. source: NIOSH NPG, accessed: 2019-09-02

CO2 

Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02

Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02

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Einstein's formula tells us the amount of energy to which a given mass would be equivalent, if it were all suddenly turned into

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Einstein's famous equation, E = mc^2 relates the mass (m) of an object to energy (E). The speed of light (c), is the constant of proportionality. Einstein formulated the equation within his theory of special relativity. Indeed, a physical interpretation of this equation is that any given mass is equivalent to the energy given by the equation, if it were suddenly converted to energy. Therefore the answer to the question is true.

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3 years ago

Assume that there is a puddle that contains 12.0 kg of water and it froze outside since it is -1°C. The

Musya8 [376]

The temperature that must be to freeze the solution would be -21.1 ° C.

<h3>How to calculate the freezing temperature of this solution?</h3>

To calculate the freezing temperature we must take into account the following information.

Solution with a salt concentration of 10% is frozen at -6°C
Solution with a salt concentration of 20% is frozen at -16°C
Solution with a higher concentration is frozen at -21.1°C

According to the above, it can be inferred that the puddle has a 50% concentration of salt because they had 12 kg of water and 6 kg of salt.

So the lowest freezing temperature would be 21.1°C because the puddle is 50% concentrated.

Note: This question is incomplete because there is some missing information. Here is the missing information:

A 10% salt solution freezes at about 20°F (-6°C), and a 20% solution freezes at 2°F (-16°C).
The lowest freezing point obtainable for salt solutions is −21.1 °C

Learn more about freezing in: brainly.com/question/14131507

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2 years ago

What particle revolves around the center of the atom? What is its Charge?

Serjik [45]

Answer:

Electrons, with a charge of -1.

Explanation:

The nucleus of the atom is composed of protons and neutrons.

The nucleus is where the bulk of the mass of an atom is found.

Electrons orbit the nucleus in various energy levels.

Protons have a charge of +1, neutrons have no charge, and electrons have a charge of -1.

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3 years ago

3.Write the symbol of the element that has a charge of +1 when it has 71 electrons.

tigry1 [53]

The symbol : $\tt _{72}^{178}Hf^{+1}$

<h3>Further explanation </h3>

There are two components that accompany an element, the mass number and atomic number

Atoms are composed of 3 types of basic particles (subatomic particles): protons, electrons, and neutrons

The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.

Atomic number = number of protons = number of electrons ⇒ neutral number

Atomic mass is the sum of protons and neutrons

Atomic Number (Z) = Atomic mass (A) - Number of Neutrons

The element has 71 electrons and a charge of +1 , so

Number of protons = 71 + 1 = 72

Number of protons = the atomic number = 72

The element with atomic number 72 is Hafnium(Hf)

The atomic mass of Hf = 178 g/mol

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3 years ago