11,12,13,14 please...

Answer:

B. Nucleus

A. Orbitals

Explanation:

Ed22

The region of the atom where protons and neutrons are located (B) is called the nucleus.

The region of the atom where electrons are located (A) is called orbits.

In an atom, the nucleus is the central core that contains protons and neutrons. It is a tiny, dense region located at the center of the atom. Protons have a positive charge, while neutrons are electrically neutral (have no charge). The number of protons in the nucleus determines the element's identity.

Orbits (also called electron shells or energy levels) are the regions around the nucleus where electrons are found. Electrons are negatively charged particles that move within these orbits. Each orbit has a specific energy level, and electrons closer to the nucleus have lower energy levels. Electrons occupy the lowest available energy levels first before moving to higher levels as the atom gains more electrons.

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The complete question is shown in the image attached below -

We can  effectively that the correct equation of the reaction is correctly written as ((6 mol)(-393.5 kJ/mol) + (6 mol)(-285.83 kJ/mol)) - (1 mol)(-1,273.02 kJ/mol).

The heat of reaction is the heat that could be absorbed or evolved in a reaction. We know that a reaction could be an exothermic or an endothermic reaction. In an exothermic reaction, energy is given out while an endothermic reaction is one in which heat is absorbed.

Having said this, we know that the reaction is a combustion reaction. Heat is always given out in a combustion reaction thus we know that the process is exothermic and the sign of the heat of reaction is negative.

Let us now look at the reaction as shown, we can see that it involves the combustion or burning of glucose in oxygen. We now seek to obtain the correct equation for the combustion reaction.

Thus, we can now write effectively that the correct equation of the reaction is correctly written as ((6 mol)(-393.5 kJ/mol) + (6 mol)(-285.83 kJ/mol)) - (1 mol)(-1,273.02 kJ/mol).

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Answer:

The levels of carbon dioxide (CO2) in the atmosphere are reduced

Explanation:

Tectonic uplift refers to the process by which the surface of the earth slowly rises either due to increasing upward force applied from the plates below the surface or decreasing downward force or weight of objects like melting glaciers acting from above. During uplift, land, as well as the sea floor rises forming mountains, plateaus and volcanic Islands.

During the process of weathering, carbon dioxide present in air combines with rainwater and forms carbonic acid. This acidic rainwater then falls on uplifted mountains and rocks weathering them in the process. Minerals present in the rock such as calcium, magnesium and sodium then combine with bicarbonate ions to form carbonates such as calcium carbonate, magnesium carbonate which are found in shells of living and dead organisms and also form rocks such as limestone. In this way, carbon dioxide is removed from the atmosphere.

Answer:rrrrrrrrrrrrrrrrrrr

Explanation:

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Answer:

symbol is Al

Explanation:

aluminum is that element

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There are 5.43 x 10²³ present in  187 grams of XeF₄

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

[tex]\tt n(mol)=\dfrac{mass(m)}{MW}[/tex]

mass of XeF₄ = 187 g

mol XeF₄ (MW=207,2836 g/mol) :

[tex]\tt mol=\dfrac{187}{207,2836 g/mol}=0.902[/tex]

Number of molecules :

[tex]\tt N=0.902\times 6.02\times 10^{23}\\\\N=5.43\times 10^{23}[/tex]

Answer:

Explanation:

because Ca is of second group they have low ionization energy when react with chlorine they have more ionic character than other in given options

Answer:

A

Explanation:

Combustion reactions always produce  water and CO2

The products for the combustion have been water and carbon dioxide along with the liberation of heat. Thus, option A is correct.

Combustion can be defined as the process of burning carbon-based compounds in the presence of oxygen. Combustion has been the process that liberates heat energy.

The combustion can be given as:

Hydrocarbon [tex]\rightarrow[/tex] Carbon dioxide + Water + Heat

The products for the combustion have been water and carbon dioxide along with the liberation of heat. Thus, option A is correct.

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Answer:

83.98 g/mol

Explanation:

To find the molar mass of AlF₃, you need to add the individual molar masses of each element times their quantities. For instance, since there are 3 fluorine atoms in AlF₃, the molar mass of AlF₃ must include the molar mass of fluorine times 3.

Molar Mass (Al): 26.98 g/mol

Molar Mass (F): 19.00 g/mol

Molar Mass (AlF₃): 26.98 g/mol + 3(19.00 g/mol)

Molar Mass (AlF₃): 83.98 g/mol

Answer:

It is a chemical reaction in which the reactants form products and products react together to give reactants back. That means reversible reactions can go in both directions forward as well as backward direction.

Response:

Sorry but I think you forgot to attach or include something, thanks for the points tho!

Other:

Brainliest? Thanks!

Answer:

An uninterruptible power supply can save data during an outage, and a surge protector can prevent damage from a surge. Surge protectors absorb or ground overvoltage from spikes. Each time a surge protector does its job, resulting damage can reduce effectiveness for the next surge.

Explanation:

Answer:

Noble Gases

Explanation:

Noble gases are very unreactive because they already have a full valence shell and therefore, do not need to bond.

Answer:

Noble gases

Explanation:

Answer:

Greater electronegativity and these are non metals.

Explanation:

Answer:

Me gusta el triángulo, la respuesta es triángulo.

Explanation:

Answer:

6.1 atm

General Formulas and Concepts:

Chemistry - Gas Laws

Combined Gas Law: PV = nRT

Temperature Conversion: K = °C + 273.15

Explanation:

Step 1: Define

n = 2.5 mol N₂

V = 10.0 L

T = 25 °C = 298.15 K

Step 2: Find Pressure P

Step 3: Check

We are given 2 sig figs as our lowest. Follow sig figs and round.

6.11953 atm ≈ 6.1 atm

The energy produced : -32.89 kJ

Delta H reaction (ΔH) is the amount of heat / heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.

For 0.8210 g of naphthalene :

mol =

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{0.8210}{128.17}=0.0064[/tex]

The energy produced :

[tex]\tt Q=\Delta H\times n(mol)\\\\Q=-5139.6\times 0.0064=-32.89~kJ[/tex]

Answer:

c. I, Br, Cl

Explanation:

The option C group of elements is expected to have the highest ionization energy.

Ionization energy is the energy needed to remove the most loosely held electron from an atom.

1. 0.33 M

2. 0.278 M

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

1. 0.350 mol of NaOH in 1.05 L of solution.

n=0.35

V=1.05 L

Molarity :

[tex]\tt M=\dfrac{0.35}{1.05}=0.33[/tex]

2. 14.3 g of NaCl in 879 mL of solution.

mol NaCl(MW=58.5 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{14.3~g}{58.5~g/mol}=0.244[/tex]

Molarity :

[tex]\tt M=\dfrac{0.244}{0.879~L}\\\\M=0.278[/tex]

Answer:

7-METHYL-4-OCTANONE 7-methyloctan-4-one 20809-46-5 4-Octanone, 7-methyl- 7-methyl-octan-4-one More...

Explanation:

Answer:

Following are the solution to the given points:

Explanation:

In point a, the answer is only ions because of [tex]NH_4Cl[/tex] has a strong electrolyte.

In point b, the answer is the only molecules because of ethanol [tex]CH_3CH_2OH[/tex], it has a nonelectrolyte.

In point c, the answer is the few ions because of hydrocyanic acid HCN, which has a weak electrolyte.

(a) Only ions.

(b) Only Molecules.

(c) Few ions.

(a) In this, only ions should be considered as it contains strong electrolyte.

(b) In this, only molecules should be considered as it contains non-electrolyte.

(c) In this, few ions should be considered due to hydrocyanic acid HCN, that contains weak electrolyte.

Therefore we can conclude that

(a) Only ions.

(b) Only Molecules.

(c) Few ions.

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Answer:

names of 10 metallic minerals are Silver, Chromium, Tin, Nickel, Copper, Iron, Lead, Aluminum, Gold, and Zinc.

Explanation:

Answer:

16.86%

Explanation:

Na3N is sodium nitride.

% of N = mass of N/ molar mass of Na3N *100

% of N = 14/83*100= 16.86%

The percent composition of nitrogen in sodium nitride is 16.86%

Sodium nitride is an inorganic compound that is used in preservatives and antidote for cyanide poisoning.

The molar mass of Na3N is 83 M

The mass of Na3N is 14 g

[tex]% \;of \;N = \dfrac{mass of N}{ molar mass of Na3N } \times 100[/tex]

[tex]\% \;of \;N = \dfrac{mass\; of \;N}{molar\; mass\; of\; Na3N} \times 100\\\\\\\% \;of \;N = \dfrac{14}{83} \times 100 = 16.86\%[/tex]

Thus, the  percent composition of nitrogen in sodium nitride is 16.86%.

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Answer:

carbon dioxide

Explanation:

Putting the Brakes on Carbon Emissions

Every year, nuclear-generated electricity saves our atmosphere from more than 506 million metric tons of carbon dioxide, equivalent to taking more than 110 million passenger cars off the road.

Answer:

3. 39 39 54

Explanation:

Atoms are the smallest units of matter that have the characteristics of a chemical element. They consist of small particles called protons, electrons, and neutrons.

Protons are positively charged particles that make up the nucleus of the atom along with neutrons, neutrally charged particles. Their mass is almost the same - about 1 AMU (atomic mass unit). Electrons, the negatively charged particles, are much lighter than them and don't significantly contribute to the mass of the atom. Their mass is equal to about 1/2000 of the mass of a proton or neutron.

This is why we need to determine which atom out of the ones you were given has the highest number of protons and neutrons. The first has 91, the second 90, the third 93, and the fourth 91. This means that the third atom has the highest mass.

Answer:

C

Explanation:

I hope that helps!!! it kinda gave you the answer though