Based on the periodic table, what is the oxidation number of oxygen (Group VI, period 2) in compounds? a) 0 b) +2 C) -2 d) 1​

Answers

Answer 1

The oxidation number of oxygen (Group VI, period 2) is -2.

The  electrical charge of an atom describes its Oxidation number.\

The number of electrons that must be gained or lost in an atom's valence electron shell to  make it  to be filled or half-filled gives us the oxidation number value.

When the atom gains electrons,it acquires a negative oxidation number. When the atom loses electrons,it acquires a positive oxidation number

Oxygen has  8 electrons  with   {He] 2s² 2p⁴ configuration.

With 6 electrons in its valence shell, it need to gain 2 electrons to achieve stability, When it gains 2 electrons, it acquires a negative oxidation number of -2.

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Related Questions

Determine the pH of 7.53 x 10-4 mol/L calcium hydroxide solution

Answers

Answer:

pH = 11,17

Explanation:

[tex][OH^{-} ] = \frac{n_{OH^{-} } }{V} = \frac{2n_{Ca(OH)_{2} } }{V} = 2[ Ca(OH)_{2} ]\\[/tex]

[tex]Ca(OH)_{2}[/tex]    →   [tex]Ca^ {2+}[/tex]        +     [tex]2OH ^ -[/tex]

[tex]7,53.10^-4[/tex]   → [tex]7,53.10^-4[/tex]   →    [tex]1,506^-3[/tex]

pOH = -log [[tex]OH^-[/tex]] = [tex]-log 1,506^{-3}[/tex] ≈ 2,822

pH = 14- pOH = 14-2,822 = 11,178

hii what the procedures of making organic fertilizer and its precautions. can u answer it i kinda need it now

Answers

Answer:

Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...

Add other organic materials to the compost. ...

Collect some garden waste. ...

Create the compost. ...

Apply the fertilizer.

Answer:

Abstract

Organic fertilizers are an essential source for plant nutrients and a soil conditioner in agriculture. Due to its sources and the composition of the organic inputs as well as the type, functionality and failures of the applied treatment process, the organic fertilizer may contain various amounts of infectious agents and toxic chemicals, especially the antibiotics that can be introduced to the subsequent food chain. A range of human and animal pathogens of bacterial, viral and parasitic origin have been the cause of food-borne epidemics due to unintended contamination from organic fertilizers. The use of antibiotics by humans and in animal feeds will also end up in the organic fertilizers. These antibiotics and other chemicals, depending on the sources of the organics, will enhance the likelihood of occurrence of resistant and multi-resistant strains of microorganisms in society and have been reported to cause ecotoxicological environmental effects and disruption of the ecological balance. Exposure of microorganisms to sublethal concentration of antibiotics in the organic products induces antibiotic resistance. WHO guidelines for the reuse of excreta and other organic matters identify the risk for the exposed groups to the reuse of the

Explanation:

5. How could you use Kepler's 3rd Law to find the relationship between all of the
moons of Jupiter?

Answers

Answer:

essentially through the use of keplers 3rd law comparing the proportionality of a planets squared versus cubed orbital patterns you can determine how fast a planet will orbit something and complete a full orbit

Explanation:

Kepler's Third Law: the squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits. Kepler's Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit. (from NASA)

What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution

Answers

Answer:

(NH4)2SO4

Explanation:

2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)

Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.

¿que otro nombre reciben las órbitas?

Answers

Podría decirse que es una elipse con el sol

EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)

Answers

Answer:

Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.

how might rising atmospheric co2 concentrations lower the ph of the oceans?

Answers

Explanation:

As CO2 concentrations rise, excess CO2 is absorbed by the oceans. CO2 in the oceans can react chemically with water to form acid. ... The difference in pH units between two acidic solutions is three.

2. Calculate the heat of combustion of C6H14(l) in kJ/mol if 1.66 g of C6H14(l) were ignited in a calorimeter containing 2750. g H2O. A 3.54˚C temperature rise was observed. The calorimeter constant is 11.2 kJ/˚C. The specific heat of water is 4.184 J/g˚C.

Answers

This problem is describing the combustion experiment where by the heat of combustion of 1.66 g of liquid C6H14 can be calculated via calorimetry. The calorimeter (C=11.2kJ/°C) contains 2750. grams of water with a temperature rise of 3.54 °C, it means we can calculate the total heat released by the combustion of this hydrocarbon via:

[tex]Q_{combustion}=-(Q_{calorimeter}+Q_{water})[/tex]

Because the heat of combustion is released to the water and the calorimeter. Next, we break down each heat and subsequently plug in the given values:

[tex]Q_{combustion}=-(11200\frac{J}{\°C}*3.54\°C +2750.g*4.184\frac{J}{g\°C}*3.54\°C )\\\\Q_{combustion}=-80,379J=-80.4kJ[/tex]

After that, we calculate the moles of C6H14 by considering the given mass and its molar mass (86.18 g/mol):

[tex]n=1.66g*\frac{1mol}{86.18g} =0.01926mol[/tex]

And finally, we divide the total heat of combistion by the moles to get the heat of combustion:

[tex]\Delta H_{comb}=\frac{-80.4kJ}{0.01926mol} =4,174\frac{kJ}{mol}[/tex]

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please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.

Answers

Answer:

is this exam.. are you coping..

Atoms: SC.8.P.8.7

Match the definition to proper definition:

Term:

Definition:

1. Atoms

A.Positive subatomic particles found in the

nucleus of the atom

2. Neutron

B. Negative subatomic particle found in the cloud

3. Proton

C. Substance that has no electrical charge

4. Nucleus

D. Basic building block of all matter

5. Electron cloud

E. Substance that consists of only one type of ato,

6. Electrons

F. Center of an atom with a positive charge

G. Outside of the atom with a negative charge

7. Element

Answers

Answer:

1 = D

2 = C

3 = A

4 = F

5 = G

6 = B

7 = E

What is the average acceleration of the car between 24 and 40 seconds? Include the correct units.

Answers

Answer:

16

Explanation:

40 - 24  16

the protein’s specific sequence is?

Answers

Answer:

The linear sequence of amino acids within a protein is considered the primary structure of the protein. Proteins are built from a set of only twenty amino acids, each of which has a unique side chain. The side chains of amino acids have different chemistries.

Hope this helps

what do you mean by decimal number system

please give answer​

Answers

The decimal number system also called Hindu-Arabic number system or Arabic number system, comprises digits from 0-9 that are 0, 1, 2, 3, 4, 5, 6, 7, 8 & 9.

2. What physical force causes suspensions to settle

Answers

Hello!

Answer:

Gravity

Explanation:

It can settle down and separate over time due to gravity.

Hope this helps! Have a great day!

what object in our solar system has the largest gravitational force

Answers

Answer: The sun

Explanation: because it has the most mass

Answer:

Hey there. That would be Jupiter.

Jupiter is the largest in our solar system which means it has the highest gravity.

A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The first step is to calculate the mass of each element in a 100-g sample of the compound. We use 100 g because it makes the calculations more straightforward. What is the mass of each element in a 100. 0-g sample of the compound? mass H = g mass S = g mass O = g.

Answers

Answer:

We assume that there is 100g of the compound (because it makes it easier to calculate) and we turn the percentages into grams.

2% of Hydrogen = 2g of H

32.7% of Sulfur = 32.7g of S

65.3% of Oxygen = 65.3g of O

Now we change the mass of these elements to moles by dividing the mass by the molar mass (which is the value of atomic mass on your periodic table)

2g/1.01g = 1.98 mol

32.7g/32.06g = 1.02 mol

65.3g/16g =4.08 mol

divide all these mol values by the smallest mol value, which is 1.02. (Round the values to whole numbers)

1.98/1.02 = 2 (rounded) of Hydrogen

1.02/1.02 = 1 of Sulfur

4.08/1.02 = 4 of Oxygen

H2SO4 (also known as sulphuric acid) is your empirical formula.

Nitrogen has two naturally occurring isotopes.
Predict the number of neutrons in the two isotopes of
nitrogen, N.
How many protons?
Electrons?

Answers

Answer:

Nitrogen has 7 protons and 7 electrons and 7 neutrons.

Explanation:

The atomic number of an element is the number of electrons and protons they have. The atomic mass - the atomic number of an element equals the number of nuetrons. The atomic mass of nitrogen is 14 and the atomic number is 7 therefore we have to subract, 14-7=7.

A model for a potential chemical reaction is shown here. Evaluate the model and the reaction shown. Which statements are correct about this model. Select ALL that apply.

A) The law of conservation of matter is followed in this model.

B) Conversation of matter is not observed because of some of the atoms are converted into energy in the reaction.

C) Conservation of matter is observed because there are the same number of each atom on both sides of the reaction.

D) Conservation of matter is not observed because there are different numbers of molecules in the reactants and the products. ​

Answers

Answer: b/c

Explanation:

Study the chemical equation.
Na + Cl2 → NaCl
Is the chemical equation properly balanced?

Answers

no it should be Na2Cl

What is the main piece of evidence supporting the theory of seafloor spreading?

Fossils of plants and animals along the ocean floor

Volcanic activity along the Ring of Fire

Glacial scratches on the seafloor

Alternating magnetic pattern in the rocks of the ocean floor

Answers

Answer:

Alternating magnetic pattern in the rocks of the ocean floor

Explanation:

The rocky sea floor on either side of mid-ocean ridges has a matching pattern of magnetic stripes. This information provides evidence for sea-floor spreading. The matching striped pattern shows that Earth’s polarity was recorded on either side of the ridge as lava oozed from the ridge and cooled.  

Answer:

Alternating magnetic pattern in the rocks of ocean floor.

Explanation:

The ocean floor consists of several types of rocks.The mid-ocean ridges has a similar pattern as well as magnetic field lines.So this makes a clear evidence.

The reaction is at dynamic equilibrium.
N2 + 3H2 ⇌ 2NH3

Which statement is correct?

(1 point)

The solution has the same concentrations of nitrogen gas and ammonia.
The solution has the same concentrations of nitrogen gas and ammonia.

Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

The solution has the same concentrations of nitrogen and hydrogen gases.
The solution has the same concentrations of nitrogen and hydrogen gases.

Both directions of the reaction have stopped.
Both directions of the reaction have stopped.

Answers

When the reaction N₂ + 3 H₂ ⇌ 2 NH₃ is at dynamic equilibrium, Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

The reaction is at dynamic equilibrium.

N₂ + 3 H₂ ⇌ 2 NH₃

Which statement is correct?

The solution has the same concentrations of nitrogen gas and ammonia. NO. Even though we don't know the equilibrium constant, it is unlikely that N₂ and NH₃ have the same concentrations at equilibrium. Nitrogen and hydrogen combine at the same rate that ammonia breaks down. YES. At the equilibrium, the forward rate is equal to the reverse rate. The solution has the same concentrations of nitrogen and hydrogen gases. NO. Even though we don't know the equilibrium constant, it is unlikely that N₂ and H₂ have the same concentrations at equilibrium. Both directions of the reaction have stopped. NO. The reactions don't stop because the equilibrium is dynamic.

When the reaction N₂ + 3 H₂ ⇌ 2 NH₃ is at dynamic equilibrium, Nitrogen and hydrogen combine at the same rate that ammonia breaks down.

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When carbon dioxide enters the blood, some of it combines with ____________ to form carbaminohemoglobin, but most of it becomes ____________ ions that diffuse into the blood plasma.

Answers

Answer:

hemoglobin to become bicarbonate

Explanation:

When carbon dioxide enters the blood it combines with hemoglobin to form carbamino hemoglobin or carboxyhemoglobin but most of it becomes carbonate ions and diffuse into the blood plasma.

What is carboxyhemoglobin?

Hemoglobin is a blood protein giving red colour to the blood. It helps to transport oxygen everywhere. When oxygen fills in the air sack, it combines with oxygen and form oxyhemoglobin.

However, hemoglobin have more affinity towards carbon dioxide and and they combines to form carbaminohemoglobin which prevents the transportation of oxygen through blood.

The carbon dioxide will be converted into carbonic acid by combining with water. This acid then forms its carbonate ions and these ions helps to maintain the blood pH to be constant.The carbonate ions, CO₃²⁻can easily diffuse into blood plasma.

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Elements in the same period in the same periodic table have the same ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answers

Elements in the same period have the same number of electron shells; moving across a period (so progressing from group to group), elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

PLEASE MARK ME BRAINLIEST ANSWERER

PLZ HELP i need it now

Answers

If maybe you can state what you’re writing about

why are there no elementary substances that have the ionic bond?

Answers

This problem is asking for the reason behind the nonexistence of elementary substances with ionic bonds. First of all, it is necessary to bear to mind that the definition of the type of bond in a compound depends on the difference electronegativity that is present between two of the atoms composing it.

For instance, in binary salts, such as KCl, NaCl, KBr and so on, we are able to know these are all ionic because they are composed by a metal and a nonmetal, which have the smallest and largest electronegativities, so that the difference electronegativity is large enough to produce an ionic bond.

In contrast, elementary susbtances, such as liquid bromine (Br2) and gases such as H2, N2, Cl2, F2 and O2, since they are all nonmetals and the same type, the electronegativity difference will be 0 and therefore, they will not be ionic but covalent.

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How many molecules are in 0.79 moles of NH4?

Answers

Answer:

14

Explanation:

Which of the following is the best definition of deposition in geology?(1 point)

A:the creation of volcanic rock when liquid magma hits the ocean and cools

B:the mixing of many layers of sediment by wind, water or ice


C:laying down of sediment in layers carried by wind, water or ice


D:the creation of any metamorphic rock

Answers

Answer:

Deposition is the laying down of sediment carried by wind, flowing water, the sea or ice. Sediment can be transported as pebbles, sand and mud, or as salts dissolved in water.

anyone have any ideas on what i should draw for my art project please let me know

Answers

Answer:

A pumpkin or a deer cus it's hunting season

Birds, Scenerys, Fish, Planets, Seas, Trees, Butterflys, BTS, Fruits, Cactus! Drawing Ideas: Imagination

Draw an object and give it a face.

Create an alternate cover to your favorite book or album.

Illustrate a scene from your favorite song.

Draw a scene or character from your favorite book.

Illustrate your favorite fairy-tale.

Invent your own insects.

Draw an intricate made up flower.

Hope this helps!

Help Please

I Have to finish this assignment asap

Answers

Answer:a. limiting reactant

b. actual yield

c. mole ratio

d.excess reactant

e.theoretical yield

f.stoichiometry

g.percent yield

h.limiting reactant

i.theoretical yield

Explanation: ..

Which over lappings are present in carbon(iv)oxide molecule

Answers

Answer:

the double carbon to oxygen bond

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