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3 years ago

A celestial body has these properties:

Chemistry

2 answers:

Dafna1 [17]3 years ago

6 0

The correct answer is D. Pluto

Explanation

According to the characteristics presented for the celestial bodies, such as the impossibility of cleaning its orbit by its small size and a rock surface without rings, the one that best suits these characteristics is Pluto. This can be explained as in 2006 Pluto was claimed to be a dwarf planet, which means it shares similarities with other planets but due to its size it does clear objects from its orbit and therefore it is not a planet. Also, Pluto is composed of rocks and ice, but different from other bodies such as Saturn it does not have rings. So, the correct answer is D. Pluto.

EastWind [94]3 years ago

5 0

Mars........................

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I think it's A, <span>an action which causes movement and an opposite reaction</span>

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3 years ago

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Write a balanced half-reaction for the reduction of permanganate ion mno−4 to solid manganese dioxide mno2 in acidic aqueous sol

Svetlanka [38]

The half-reaction includes either the reduction or the oxidation reaction of the redox reactions. In acidic solution permanganate ion will react with hydrogen ion to yield manganese ion and water.

<h3>What are Redox reactions?</h3>

Redox or oxidation-reduction reactions are the chemical reactions in which the oxidation and the reduction of the chemical species occur simultaneously.

Permanganate (VII) ion is a strong oxidizing agent and gets easily reduced to manganese ion in presence of the hydrogen ion in an acidic solution.

The balanced half-reaction for reduction is shown as,

$\rm MnO_{4}^{-} \; (aq)+ 8H^{+} \; (aq)+ 5e^{-} \rightarrow Mn^{2+} \; (aq)+ 4H_{2}O \; (l)$

Learn more about reduction reactions here:

brainly.com/question/10084275

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2 years ago

1. Find the number of protons, neutrons, electrons and electronic structure of flourine 919F.

77julia77 [94]

1. ₉¹⁹F

2. Mg(OH)₂

3. 2H₂ + O₂ ⇒ 2H₂O

<h3>Further explanation</h3>

1. Fluorine, atomic number : 9 , mass number = 19

Symbol : ₉¹⁹F

protons=electrons=atomic number = 9

neutrons = mass number - atomic mass

$\tt n=19-9=10$

Configuration : [He] 2s² 2p⁵

2. Magnesium hydroxide is an ionic compound and is a strong base consisting of 2 ions:

Positive ion: Magnesium: Mg²⁺

negative ion: Hydroxide: OH⁻

The charges of the two are crossed, so that the compound becomes:

Mg(OH)₂

3. Reaction :

H₂ + O₂ --------> H₂O

give coefficient :

aH₂ + bO₂ --------> H₂O

H, left = 2a, right 2⇒2a=2⇒a=1

O, left = 2b, right 1⇒2b=1⇒b=0.5

Reaction becomes :

H₂ + 0.5O₂ --------> H₂O x 2

2H₂ + O₂ --------> 2H₂O

4 0

3 years ago

Is 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O a double replacement?

natulia [17]

Answer:

The answer to your question is No, it is not.

Explanation:

Data

C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

In a double replacement reaction, two reactants interchange cations an example of these reactions are neutralization reactions. In neutralization reactions, an acid and a base react to form a salt and water.

The reaction of this problem is not a double replacement reaction because the products are carbon dioxide and water, not a salt and water.

The reaction of this problem is a combustion reaction.

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3 years ago