Answer:
A. They include both oxidation and reduction reactions AND B. Electrons are transferred.
Explanation:
a p e x
The statements that are true about redox reaction are:
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
What is a redox reaction?The Redox reaction is the one in which oxidation and reduction take place simultaneously. In this process transfer of electrons takes place which further leads to oxidation or reduction.
Thus, options A and B are correct.
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In the equation
FeCl3+ O2 -->Fe2O3 +Cl2
if 6 moles of FeCl3 react with 3 moles of oxygen, what is the excess reactant?
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.
28. Which of the following statements is TRUE about acids and bases
A. Acids and bases do not react with each other
B Acids mixed with bases neutralize each other
C Acids mixed with bases make stronger bases
D. Acids mixed with bases make stronger acids
hont to flow called?
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 .
10 points
10. What is the correct order of your blood vessels from largest to
smallest?
a. veins arteries, capillaries
b. capillaries, veins, areteries
c. arteries, veins, capillaries
d. none of the above
what occurs along a convergent plate boundary ?
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.
At an ocean - ocean and continental - ocean convergent front, subduction of the oceanic plate occurs. This is because the oceanic plate below is denser than the asthenosphere. At a continental - continental convergent front, the continental crust is pulls upward and build up as a mountain. The subduction produces trenches and some volcanic islands.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:
explain faraday's law
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.
Which one of the following statements about s orbitals is incorrect ?
Group of answer choices
ANSWER
d is the corresect answer
Answer:
d is the correct answer
Explanation:
Cherylanne mixes together Chemical A and Chemical B in a test tube, forming Chemical C. The mixture instantly turns cool to the touch. She then adds Chemical D, and the reaction becomes hot and explodes. What can be known about this situation? Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction. 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.
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.
We can see that the first reaction is endothermic. The second reaction is exothermic.Answer:
A or 1Explanation:
Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction.the rest are wrongChemicals 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.
(20 POINTS!!) please help me write a short reference page on chemical bonds (anything helps)
•differentiate the characteristics of ionic and covalent bonds
•summarize the steps and rules for naming IONIC and COVALENT bonds
•describe the role an elements charge has in writing and naming bonds
- how do roman numerals change the process of naming ionic compounds
have a good day :)
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.
(4.2 x 10^8) + (2.6 x 10^6) *
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
What is the problem with O2?
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."
Is smog a pure substance
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 :)
if hydrochloride tablets and eno combine what will the reaction
answer is attached in the image below
Answer:
Hydrochloric Acid
Explanation:
What variable represents specific heat in the equation Q = mcAT?
O A. The variable c
OB. The variable T
O C. The variable m
O D. The variable Q
Answer: A. The variable c
============================================
Explanation:
Q = heat transferred
m = mass
c = specific heat
[tex]\Delta T[/tex] = delta T = change in temperature
Rank the electronegativity values of lithium, oxygen, potassium, and selenium from lowest to highest
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.
Down a group, electronegativity reduces and across the period from left to right, it increasesPotassium 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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What is the difference between a molecular formula, structural formula and an electron dot formula? Give an example of each
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:
Select the item with the highest embodied energy for a typical American. A. Organically grown oranges transported 500 miles by truck B. Pineapple imported by air from Costa Rica C. Sweet corn produced locally using synthetic fertilizer D. Green beans grown in the backyard garden
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.
How many electrons does an atom have if the mass number is 31 and the number of neutrons is 16?
Answer:
I'm pretty sure it's 15 electrons. Hope this helps :).
Explanation:
MARKING BRAINLIEST!
plant or animal and to explain the reasoning for their conclusion. What is the correct response?
The cell is an animal cell because it has a cell membrane and no cell wall. Cell walls are unique to plant cells.
The cell is a plant cell because it has cytoplasm, which helps the plant make their own food from sunlight.
The cell is a plant cell because it has chloroplast, which helps the plant make its own food from sunlight.
The cell is an animal cell because it has chloroplast used for making useable energy.
Answer:c is correct
Explanation:
En un vaso se han puesto 250 g de alcohol junto con 2 g de yodo, que se disuelven completamente. Calcular la concentración de la disolución en % en masa.
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%
A 3.5 kg iron shovel is left outside through the winter. The shovel, now orange with rust, is rediscovered in the spring. Its mass is 3.7 kg. How much oxygen combined with the iron?
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).
What does iron and oxygen together mean?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.
Iron may rust even without water?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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oxidation number of lead is PbO2
Answer:
+4
Explanation:
what kind of change forms a chemical reaction?
a. a phase change
b. a solubility change
c.a physical change
d. a chemical change
Answer:
a chemical change is correct answer
Describe are seasons like near the equator.
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.
Type the correct answer in each box.
Balance the equation.
SiO2 +
CaC2 →
Si +
CaO +
CO2
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.
What is causing the shrinking of the taiga forest biome?
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
Write any three possible structures for octane, C8H18 and give their IUPAC names
Answer:
Octane (n- octane) C8H184 - Methylheptane3- Ethylhexane2 ,2 - Dimethylhexanehope it helpsThe three possible structures for octane, C8H18 and give their IUPAC names are -
Octane2-Methylheptane2,2-Dimethylhexane(structures are attached)
The octane is a hydrocarbon with 8 carbon atoms and 18 hydrogen atoms. The molecular formula of octane is C8H18.
Carbon is a tetravalent atom that contains 4 electrons in the valence shell.carbon can donate its four electrons to form bonds with four other atoms.The structure of octane is drawn by first drawing a straight-chain or parent chain of 8 carbons and attaching 18 hydrogens on carbon to fulfill its tetravalency.The three possible structures for octane, C8H18 and give their IUPAC names are -
Octane2-Methylheptane2,2-DimethylhexaneLearn more about:
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Balance the equation
__Ni(CIO)3 → _NiCl2+ _02
Thermal energy always transfers from a Fill in the blank text field 1 Type your answer here. object to a Fill in the blank text field 2 Type your answer here. object. The transfer of this energy, called heat, is measured in Fill in the blank text field 3 Type your answer here. .
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,
Is NaHCO3 a compound? Explain pls!
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
