Which statement describes why sodium reacts more vigorously than magnesium to hydrochloric acid? Refer to the periodic table. Circle the letter of the correct answer.

1) Sodium has a smaller atomic radius than magnesium.
2)Sodium has a lower ionization energy than magnesium.
3)Magnesium has a lower ionization energy than sodium.

Considering the reaction stoichiometry, the correct answer is second option: the total number of moles of water produced from 13. 35 mol of oxygen is 26.7 moles.

The balanced reaction is:

2 H₂ + O₂ → 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Then you can apply the following rule of three: if by stoichiometry 1 moles of O₂ produce 2 moles of H₂O, 13.35 moles of O₂ will produce how many moles of H₂O?

[tex]amount of moles of H_{2} O=\frac{13.35 moles of O_{2} x2 moles of H_{2} O}{1 mole of O_{2}}[/tex]

amount of moles of H₂O= 26.7 moles

Finally, the correct answer is second option: the total number of moles of water produced from 13. 35 mol of oxygen is 26.7 moles.

Learn more about stoichiometry:

Answer: Cell wall

Explanation: Cell wall is a unique structure found only in some specific organisms like plants, bacteria, fungi etc. The cell wall in plants is predominantly made up of a polysaccharide called CELLULOSE. This carbohydrate confers upon the cell "rigidity".

The cell wall is an additive material including the cell membrane that coats the external part of the cell of plants, hence, it gives plant cells their characteristic shape. The cell wall contributes to the overall flexible but rigid shape of the plant cell, protecting the cell against physical or chemical stresses.

Answer:

It will take 22920 years to decay 112.5 g of 120 grams.

Explanation:

Answer:

6.25s

Explanation:

time = distance / speed

time = 50 / 8

time = 6.25s

Answer:

A) HF (Hydrofluoric acid)

Explanation:

dw I gotchu. So first off there are three types of intermolecular forces of attraction: 1) London-Dispersion, 2) Dipole-Dipole, 3) Hydrogen-Bonding Attraction Forces. That is also ranked in increasing strength, with Hydrogen-Bonding Attraction Forces being the strongest. Every molecule has London-Dispersion forces present and all the diatomic molecules listed have dipole moments of a certain debye (or Coloumb-meter) value. Both are irrelevant here so dw about that. Lets look at the strongest attraction: the hydrogen-bonding one. Now, don't get confused bc all of these acids are bonded to H bc hydrogen-bonding attraction forces only occur when H is bonded to N, O, or F. So Process of Elimination, hydrofluoric acid (HF) has the strongest intermolecular forces of attraction.

Note: If you don't know what inter/intra molecular forces of attraction are, ill give u a quick summary. Intermolecular refers to electrostatic attractions between molecules while intramolecular refers to the actual bonds, single, double, or triple, binding the atoms together. Well there you have it, have a great day. :)

The position where the moon is located where its shadow may sometimes reach Earth is position A .

We know that in the outer space there are a lot of celestial bodies that can be found. Now we know that a celestial body is one that can be found in the outer space and the moon and the sun are all parts of the celestial bodies that we can find in the solar system.

In this case we  are being asked for the position of the moon that could lead to an eclipse where the moon would come between the earth and the sun and that is the position A.

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#SPJ1

Answer:

Alcohol will form at more substituted carbon due to carbocation rearrangement so 2-hexanol

Explanation:

Well if it’s acid catalyzed

Answer:

Explanation:

Since the whole magnet is magnetized, when you break a magnet in two parts, you will receive 2 mini magnets which will work just like a magnet.

Hoped this helped.

[tex]BrainiacUser1357[/tex]

Answer:

4

The two pieces would each have a north and south end

1. Genetic factors are those where the genetic condition of an individual is capable of increasing the probability of developing certain diseases.

Environmental factors include the diversity of environmental stresses such as population density, temperature, food and pollutants that impact human health.

Social factors are related to the interaction of groups through culture, social class and family structure, which also have an effect on population health.

Pathogenic factors, on the other hand, are those transmitted by agents such as viruses, fungi, bacteria and protozoa, which colonize a host by adhering to cells and evading immunity, generating diseases.

2. The transmission of pathogens can occur in several ways, such as contact with bodily fluids from infected people, cross-transmission or through being spread through particles in the air.

3. We can prevent the transmission of pathogens through proper hygiene habits, healthy eating, vaccination against infectious diseases and avoid contact with other people if you have a communicable disease.

4. The environment can affect personal health through climate change, pollution and lack of infrastructure that lead to less access to quality food and basic health conditions.

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https://brainly.com/question/13179079

Answer:

1.correct

3.correct

Explanation:

pls mark me as brainliest

Answer:

I believe A is the correct answer.

Explanation:

I note that another response includes C. as another correct answer.  It is possible, but it depends on what is meant by "fixed shape."  I interpret "fixed shape" as the collection of the gases forming a fixed shape on their own.  Gases fill the container they are in (be it a flask, room, or a planet, so they have a fixed shape by that definition.  But a primary definition of gases is that that take on the shape of their container, not a shape of their own.

A. is correct because perfect gases have no interactions (AKA the Ideal Gas Laws).  They may have interactions, and often do, but they are weak.  That's why the ideal gas laws are a good first approximation to how gases change volume based on temperature and pressure.

Answer: 20 , 40

I want know the answer now !

Answer:

The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of  mutualism. Thank you for posting your question here at brainly. I hope the answer will help you.

Answer:

Nickel(III) Sulfate Ni2(SO4)3 Molecular Weight -- EndMemo.

Explanation:

this will explain everything

Answer:

I think it's A but I might be wrong

Explanation:

Answer:

13.13g

Explanation:

65.8÷80.06 =0.821 mol the same

the same amount of moles of Oxygen reacts with

because the ratio is 1 :1-1

let's calculate how much grams for 0.821 of oxygen

oxygen 1 mole is =16 g

well for 0.821=16* 0.821 which is 13.136grams

you have to drink a lot of water and 67890

Explanation:

1397.4 uranium atoms......

Answer:

In order for the powder to dissolve, each powder molecule must separate from the other powder molecules and be surrounded by water molecules. This shift in arrangement either absorbs or releases energy depending on the situation. It is due to the exchange of energy that the temperature of the solution fluctuates.

Explanation:

:)

Answer: The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

Answer:

The electron microscope is the answer.

Answer:

Electronegativity is defined as the tendency of an atom participating in a covalent bond to attract the bonding electrons

Explanation:

Electronegativity increases and you go up and to the right, making fluorine the most electronegative element.

Answer:

answer is 2

Explanation:

just did the quiz

Answer:

NH4I

..................

I hope it helps

Answer:Ammonium Iodide is a chemical compound with a formula Explanation: nh4l

Homogeneous mixture - same throughout

Heterogeneous mixture - different throughout

Answer:  Homogeneous Mixture : B(different throughout)

Heterogeneous Mixture : A(same throughout)

The continuation of the electron configuration would be [tex]3p^6, 4S^2, 3d^3[/tex].

The initial p orbital is partially filled. Hence, it has to be completely filled first in order to obey the orbital filling rule. Lower energy orbitals are first filled before higher energy orbitals.

After filling the p orbital with 2 electrons from the remaining 7 electrons, higher energy orbital 4s and 3d can then be filled.

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Answer:

3p^6 4s^2 3d^3

Explanation:

Answer:

3.917 x 10 ^ 23

Explanation:

You just want to use dimensional analysis to solve. So first start with 122g of copper(II) nitrite, and divide by the molecular weight to get it into moles. Then you know that 1 mole = 6.022 x 10 ^23 molecules (Avogadro's Number) so multiply that by your current moles. A hint for these problems always convert what you were given to moles since it is easy to get to a lot of things through them. ** Use the molar mass/molecular weight for going from grams to moles or moles to grams and use Avogadro's number when going from moles to atoms/molecules or reverse.

Hope this helps!

The volume of carbon dioxide produced when 375 mL of a 75.0% ethanol solution by mass with a density of 1.22 g/mL reacts with excess oxygen is  667.52 L.

We are told in the question that the solution contains 75.0% ethanol solution by mass.

Hence;

Density of solution = mass/volume

mass = Density × volume = 1.22 g/mL × 375 mL = 457.5 g

Mass% = mass of solute/ mass of solution × 100

Mass of solute = x

Mass of solution = 457.5 g

Mass percent = 75.0%

Substituting values;

75 = x/457.5 + x × 100

75/100 = x/457.5 + x

0.75(457.5 + x) = x

343.125 + 0.75x = x

343.125  = x -  0.75x

x = 343.125/0.25

x = 1372.5 g

The equation of the reaction is;

C2H6O(l) + 3O2(g) → 2CO2(g) + 3H2O(l)

Number of moles of ethanol =  1372.5 g/46 g/mol = 29.8 moles

From the reaction equation;

2 moles of ethanol produces 2 moles of carbon dioxide

29.8 moles of ethanol also produces 29.8 moles of carbon dioxide

If 1 mole of carbon dioxide occupies 22.4 L

29.8 moles of carbon dioxide occupies 29.8 moles × 22.4 L/ 1 mole

= 667.52 L

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