When carbon is completely combusted in the presence of oxygen the only product produced is carbon dioxide as shown in the following equation, C+O2——>CO2 If 12 grams of carbon are burned, how many grams of carbon dioxide will be produced?

Answer:

I'm pretty sure it's 15 electrons. Hope this helps :).

Explanation:

Answer: A. The variable c

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Explanation:

Q = heat transferred

m = mass

c = specific heat

[tex]\Delta T[/tex] = delta T = change in temperature

Explanation:An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between identical atoms. ... Ionic bonds form between a metal and a nonmetal. Covalent bonds form between two nonmetals.      

Fe + O2 ⟶FeO2⟶FeO2​,As we can see our compound is FeO2FeO2​ which is a simple combination with the same stoichiometry, so we will just do a subtract operation : 3.7 kg - 3.5 kg $= 0.2 \ \text{kg} \Rightarrow 0.2\color{#4257b2}{0} $ kgkg (respecting significant figures rule).

Rust is the result of an iron and oxygen interaction together:It's an ionic since it is made up of the a metal and something that is not a metal.

Without water, rust cannot develop.Iron pipes frequently rust on the inside due to water vapor condensation on the metal.Moisture facilitates the electrolyte required for the reaction iron take place, which expedites the rusting process.

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Answer:

Hi! Think of it like this:

You and your family are going to go on a vaction for the holidays, to south america or somewhere else. You´re near the equator so it will be warm. If you were to move there, you might pull out the swimsiutes because most of the time, its useally warm and sunny. They dont really get cold weather. They will have a nice and warm christmas.

Explanation:

Faraday's Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor. ... Magnetic induction makes possible the electric motors, generators and transformers that form the foundation of modern technology.

The translation of the question is

250 g of alcohol have been put in a glass together with 2 g of iodine, which dissolve completely. Calculate the concentration of the solution in% by mass?

Answer:

The %mass by mass of the given solution is 0.794%

Explanation:

We are given

Mass of solute(Iodine) = 2g

Mass of the solvent (Alcohol) = 250g

Since the Iodine dissolves completely in Alcohol

Total mass of the solution = 250 + 2 = 252g

the formula of concentration of the solution in  % by  Mass is given by

%[tex]\frac{w}{W} = \frac{Mass of the solute*100}{Total mass of the solution}[/tex]

%w/W = [tex]\frac{2*100}{252}[/tex]

          = 0.794%

Therefore the %mass by mass of the given solution is 0.794%

Answer:

Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction.

Explanation:

The reaction that produced chemical C is an endothermic reaction whereas, the reaction between C and D is an exothermic one.

An exothermic change is one in which heat is liberated to the surroundings. So the surrounding becomes hotter at the end of the reaction.

An endothermic reaction is a change in which heat is absorbed from the surrounding and hence the surrounding colder at the end of the change.

Answer:

Explanation:

Chemicals A and B form an exothermic reaction, and chemicals C and D form an endothermic reaction.

Chemicals A and C form an endothermic reaction, and chemicals B and D form an exothermic reaction.

Chemicals A and B form an exothermic reaction, and chemicals B and D form an endothermic reaction.

Explanation:

Thermal energy is the transfer of energy from one object to another as a result of difference in their temperature. The direction of the transfer is from a hot body (higher temperature) to a cold body (lower temperature).

The transfer of this type of energy called heat is measured in joules,

Answer:

a chemical change is correct answer

Answer:

B: Pineapple imported by air from Costa Rica

Explanation:

Embodied energy is the total energy that is required for the extraction, processing, manufacture and transportation of materials to its intended usage destination.

This means highest embodied energy will be the work that demands the most energy for extraction, processing, manufacture and transportation of materials to its intended usage destination.

Looking at the options given, the one with the highest embodied energy will be "Pineapple imported by air from Costa Rica". This is because other options are done locally and thus will consume lesser energy and processing time unlike the pineapple that is coming from another country and by air.

Answer:

Potassium < lithium <  Selenium < Oxygen

Explanation:

Oxygen has the highest electronegativity value from the given choices.

Electronegativity of an element is a property that combines the ability of its atom to lose and gain electrons.

It is a measure of the relative tendency with which atoms of the element attracts valence electrons in a chemical bond.

Potassium and lithium are in group 1 , selenium and oxygen are group 7;

 So group 1 elements will have lower electronegativity value.

Potassium is below lithium in group 1 and its electronegativity value will be lower.

Selenium is below oxygen and also, its electronegativity value is lesser.

The electronegativity values of lithium, oxygen, potassium, and selenium from lowest to highest is potassium, lithium, selenium and oxygen.  

The electronegativity of an element is a measure of the tendency of an atom of element to attract bonding pair of electrons. Electronegative elements have the ability to attract shared electrons of covalent bonds to itself.

The most electronegative element is fluorine. Electronegativity increases across the period in the periodic table .

Electronegativity decreases down the group in the periodic table. Generally metallic elements are have lower electronegativity. This is because they mostly give out there electrons.

Therefore,  the electronegativity values of lithium, oxygen, potassium, and selenium from lowest to highest is potassium, lithium, selenium and oxygen.  

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answer is attached in the image below

Answer:

Hydrochloric Acid

Explanation:

Actually, interesting enough, smog is an example of a heterogeneous mixture. So no, it's not a pure substance.

Answer:

No, smog is not a pure substance.

Explanation:

Smog is a heterogeneous mixture, heterogeneous mixtures contain two or more phases.

Hope this helped :)

Answer:

5SiO2 + 2CaC2 = 5Si + 2CaO + 4CO2

Explanation:

balancing equations is a lot of trial and error. My strategy to approaching this equation was to get the O's balanced. After trying several combonations I found that I needed 10 O's on each side of the equation for the other elements to match up. After I balanced the O's, I balanced my C's to 4 on each side. Then I balanced my Ca's to have 2 on each side. And last but not least I balanced my Si to have 5 on each side.

Answer:

Yes it is

Explanation: because it is composed of identical molecules consisting of atoms of two or more chemical elements.

hope it helps <3

Answer:

Two plates pull towards each other

Explanation:

Along a convergent plate boundary, two plates moves towards each other as the move in the same direction.

This results in different forms of plate interactions depending on the plate types.

Answer:

What happens along a convergent plate boundary?

If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. ... The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary

Explanation:

Answer:

It’s one of the most popular mobile networks across the UK, but it seems that O2 is having issues this morning

explanation:

According to Down Detector, the issues started at around 10:41 BST, and are affecting users across the UK.

Of those who reported issues, 74% said they were having problems with their mobile phone, 13% with the network, and 11% with mobile internet.

Speaking to Mirror Online, an O2 spokesperson said: "The earlier issue we experienced where some customers may have had difficulty using mobile data has now been resolved. Our technical teams are continuing to closely monitor the situation. We apologise for any inconvenience."

Answer:

Deforestation

Explanation:

The value of softwood means that large areas of Russia's taiga have been cleared: deforestation is occurring at a rate of 12 million hectares per year (2014). As much as half of the logging in the far east of Siberia is illegal

Answer:

deforestation

Explanation:

and tectonic plates

Answer:

B. Acid mixed with bases neutralize each other

Answer:

Hey buddy, here is your answer. Hope it helps you.

Explanation:

B- Acids mixed with bases neutralize each other. Acid + base ——-> salt+water solution. Mixing these two will make them neutralize .

Answer:c is correct

Explanation:

Answer:

The molecular formula tell us what elements the atoms are, and how many moles and atoms are attributed toward each element. For example, molecular formula of glucose is . That means one molecule of glucose has 6 molecules of C, 12 molecules of hydrogen and 6 molecules of oxygen.  

The structural formula of a chemical compound is a graphic representation of the molecular structure.

Electron dot diagram or a Lewis diagram or a Lewis structure.

Explanation:

Answer:

FeCl₃ is present in excess.

Explanation:

Given data:

Number of moles of FeCl₃ = 6 mol

Number of moles of oxygen = 3 mol

Excess reactant = ?

Solution:

Chemical equation:

4FeCl₃ + 3O₂      →    2Fe₂O₃ + 6Cl₂

Now we will compare the moles of reactant with product.

               FeCl₃         :          Fe₂O₃

                  4             :              2

                  6             :            2/4×6= 3

              FeCl₃         :              Cl₂

                  4             :               6

                  6             :            6/4×6= 9

                  O₂           :          Fe₂O₃

                  3             :              2

                  O₂          :              Cl₂

                   3             :               6

Less number of moles of product are formed by the oxygen thus it will act as limiting reactant while FeCl₃ is present in excess.

Answer:

The three possible structures for octane, C8H18 and give their IUPAC names are -

(structures are attached)

The octane is a hydrocarbon with 8 carbon atoms and 18 hydrogen atoms. The molecular formula of octane is C8H18.

The three possible structures for octane, C8H18 and give their IUPAC names are -

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Answer:

d is the correct answer

Explanation:

422600000 or 4,226x 10^8

Answer:

422.6*10^6

Explanation:

(4.2*10^8)+(2.6*10^6)

4.2*10^8+2.6+10^6

(4.2*10^2+2.6)*10^6

(4.2*100+2.6)*10^6

(420+2.6)+10^6

Final Answer:

422.6*10^6

Answer:

+4

Explanation: