Identify The Molecular Shape Of Each Lewis Structure. Bent Tetrahedral Trigonal Planar Trigonal Pyramidal (2024)

Answer: :Change in thermal energy = mass x specific heat capacity x change in temperature.

Explanation: what it basically means is mass x heat x the change in temperature.

Answer:

on-skin silicone, liquid latex, and gelatine

Explanation:

hope this helps:)

Answer: As one atomic dipole nears another atom it will affect the electron density distribution, so for example if the slightly positive end of the atom is located next to another atom, it will attract the electron(s) in the other atom. A covalent bond happens when atoms share an electron between them. The other kind of bond is called ionic, and it happens when one atom gives an electron to another atom. These bonds are held together with electric forces. Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are different.

Answer:

there are relatively few atoms but they can make many molecules

Explanation:

Devices that use a liquid spray to remove pollutants from the air are called scrubbers. The correct option is C.

What is a wet scrubber?

Wet scrubber is a pollution removing technique from the air. It is a sprayer which trap the harmful gas molecules from the air.

It is used in factories and industrial exhaust steams.

Thus, the correct option is C. scrubbers.

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Explanation:

a) 2(Cr)³++3BiO3-+4H+→3(Bi)3++Cr2O72-+2H2O

b)

have posted a similar question in the image for the phosgene i hope it helps little

The characteristics of a chemical reaction are:

The lower energy of reactants → Transition state → High energy of products.

What is a chemical reaction?

A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.

The characteristics of a chemical reaction are :

Lower energy of reactants

↓

Transition state

↓

High energy of products

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Answer:

Therefore, the oxidation state of sulphur atoms in Na2S2O3 is −2 and +6.

hey there!

The Gas law is COMBINED GAS LAW

GIVEN :

P1=1.00 atmp
V1=3.50 lit
T1 = 20.0°C = 293K
P2=0.600 atmp
T2=-20.0°C=253K

Now,

Formula =>

P1V1/T1 =P2V2/T2

=> V2 = (P1/P2)(T2/T1)(V1)

=> V2 = (1.00/0.60)(253/293)(3.50)

=>V2 = 5.01403 L

=> V2 = 5L (approx).

Biological specimens are the preserved remains of the biological materials. Compound A. formaldehyde or formalin is used to preserve the specimens. Thus, option A is correct.

What are fluid-preserved specimens?

Fluid preserved specimens are the biological material of the organism that are kept at the store to study and analyze over a long time without getting any damage. Formaldehyde along with alcohol is the most common preservative.

Formaldehyde is an organic compound that is colorless and pungent in the smell that preserves the dead remains of the organisms intact. It is antiseptic and germicide in nature that makes them best for the purpose.

Therefore, option A. formaldehyde is used to preserve the specimens.

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Answer:

so i put a...

Explanation:

Edge doesnt give correct answers on unit tests, but i passed with an 88 :)

Correct me if im wrong!!

The chemical's IUPAC names of the given compound are propanal and acetone.

What is IUPAC naming?

IUPAC is the international union of practical and applied chemistry. It set rules for standard naming of the compound.

Propanal, or propanaldehyde, is an aldehyde that has one double bond and one oxygen atom.

Acetone is a kind of ketone. Ketones have the functional group R2CO.

Thus, chemical's IUPAC names of the given compound are propanal and acetone.

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Answer:

Moving away from us

Explanation:

I believe this is the answer. Sorry if it's incorrect, I'm not very good in this subject.

During the riding of the steep mountain, the body needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.

What is the effect of cycling?

Cycling is a good exercise as swimming, while cycling, happy hormones are released like dopamine and serotonin.

The primary forces that work while cycling are gravity, friction, rolling resistance, and air resistance.

Thus, During the riding of the steep mountain, the bod needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.

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The number of moles of Fe₂O₃ that must react to produce 760 kg of Fe are 20.503

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

The reaction is [tex]\rm Fe_2O_3 (s) + 3CO (g) ----- > 2Fe (l) + 3CO_2[/tex]

The mass of Fe is given 760 kg

The molar mass of Fe is 55.9 g/mol

To calculate the number of moles

[tex]n = \dfrac{m}{M} \\\\n = \dfrac{760000}{55.9 g/mol} = 13,669[/tex]

Now, the ratio between Fe and O is 2 : 3

[tex]\dfrac{13,669}{2} \times 3 = 20,503.5[/tex]

convert it into kg = 20.503 mol

Thus, the moles are 20.503 mol

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Answer:

B.) If sodium carbonate is added to vinegar, the reaction will absorb heat.

Explanation:

A.) is incorrect because this is not testable. Rather, it is just an opinion that cannot be proven correct or incorrect.

B.) is correct because this statement is testable. Tests need to be run to determine the accuracy of the statement.

C.) is incorrect because this statement explains something that does not need to be tested. It is an example of a physical change when one tears a piece of paper.

D.) is incorrect because this is already a true statement. It is obvious that not all reactions absorb/release heat. While tests could be run to further prove this statement true, it is already considered accurate.

B is correct

Which of the following is the best hypothesis?
OA. Physical changes are much less interesting to watch than
chemical changes.
B. If sodium carbonate is added to vinegar, the reaction will absorb
heat.
C. Tearing a piece of paper is an example of a physical change.
D. Some chemical reactions absorb heat, and others release heat.
SUBMIT
Help me y’all

Answer:

1.23 moles

Explanation:

Ideal gas law

PV = n RT R = .082057 L-atm/mol-K

25 C = 298.15 K

12 (2.5) = n (.082057) (298.15) n = 1.23 moles

Explanation:

To give the glass its final shape and size, it is blown into with a blowpipe, creating a sort of bubble of glass. To carry out this process, the blowpipe holding the glass must be placed on a steel stand. Then, the glass artist has to blow into the blowpipe while rotating it at the same

Answer:

in illustration 1

the mother told her son not to play with the boy having cough because it is a transferable disease which could cause him also to get sick and would get cough.

while in

illustration 2

the mother let the boy play with the boy having asthma because it is not a transferable disease which wold not affect him or any one else.

Explanation:

this is the reason

#1

Cough is a infectious disease .It spreads through the droplets falling outwards during coughing.If her son stays there for long time he would be affected by cough also or he would get sick .So the mother denied .

#2

Asthama is although a disease of lungs but it doesn't spread through air or droplets.It's not infectious .So nothing would happen if her child plays

The Intermolecular force is a type of force which exists between particles in an Ideal gas.

What type of force which exists between particles in an Ideal gas?

Intermolecular forces are considered weaker attractions that hold molecules in gas close together. This force of attraction is present between molecules or particles.

So we can conclude that the Intermolecular force is a type of force which exists between particles in an Ideal gas.

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A model of materials will show dense materials having tightly packed particles while less dense materials will have greater spaces between their particles.

What is density?

Density is a measure of the compactness of a material.

Density is defined as the ratio of mass to the volume of a substance.

Density = mass/volume

Dense materials have tightly packed particles while less dense materials have greater spaces between their particles.

Avogadro's hypothesis applies to substances in gaseous form since they do not have a constant volume.

Therefore, a model of materials will show dense materials having tightly packed particles while less dense materials will have greater spaces between their particles.

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Hess’s Law describes how the heat energy of a reaction consists of the total of the energy changes of the individual step reactions.

What is the statement if Hess's law of constant heat summation?

Hess's law of constant heat summation states that the total heat changes that occur in a reaction is independent of the several intermediate pathways of the reaction, but is a sum of all the heat changes that occur.

Hess’s Law describes how the heat energy of a reaction consists of the total of the energy changes of the individual step reactions.

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Answer:

I didn't draw this but I think they're asking you to draw this

Explanation:

Here we will show you how to convert 65 grams of oxygen to moles of oxygen. Before we begin, note that oxygen (O) is a chemical element that you can find in the periodic table, and grams (g) is a metric measurement.

The atomic mass of oxygen is 15.9994. That means that one mole of oxygen weighs 15.9994 grams (15.9994 grams/moles). We can therefore make the following equation:

Grams × (1/15.9994) = Moles of Oxygen

Now that we have the equation, we can enter 65 grams into it to get 65 grams of oxygen converted to moles of oxygen:

Grams × (1/12.011) = Moles of Oxygen

65 × (1/12.011) = 4.0626523494631035

65 grams = 4.0626523494631035 Moles of Oxygen

65 grams of oxygen is approximately equal to 2.03125 moles.

To convert 65 grams of oxygen to moles, we need to use the molar mass of oxygen (O₂), which is approximately 32.00 g/mol. Oxygen exists as a diatomic molecule (O₂), so we use the molar mass of O₂ to convert from grams to moles.

The formula for converting grams to moles is:

Moles = Mass (in grams) / Molar mass (in grams per mole)

Given:

Mass of oxygen = 65 grams

Molar mass of oxygen (O₂) = 32.00 g/mol

Moles of oxygen = 65 grams / 32.00 g/mol

Moles of oxygen ≈ 2.03125 moles

Therefore, 65 grams of oxygen is approximately equal to 2.03125 moles.

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Answer:

Explanation:

Answer: 1.380 × 10^-8 M

The pH is the measure of alkalinity or acidity of a substance.

It is the negative logarithm of H+ ions concentration [H+].

pH = -log[H+]

pOH on the other hand is negative logarith of OH- concentration [OH-].

pOH = -log[OH-]

In this case;

pOH = 7.86

We can calculate the [OH-]

pOH = -log[OH-]

But, pOH = 7.86

pOH = -log[OH-]

-log[OH-] = 7.86

[OH-] = Antilog -7.86

= 1.380 × 10^-8 M

Therefore, [OH-] is 1.380 × 10^-8 M

Answer:

D. has characteristics between conductor and insulator

⇒ 0.018

-use pH=-log[H3O+]

-solve for H3O+

[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.

What is molarity?

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Given data:

Molar mass of [tex]C_8H_1_8[/tex] = 0.762 mol

Volume of solution = 405,576.398 mL = 405,576.398 mL/1000 = 405.576398 L

Solution:

Step 1: Calculating moles of [tex]C_8H_1_8[/tex]

•Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]

•Putting the value in the given formula

•Moles of solute C8H18 = [tex]\frac{\;Mass}{\;Molar \;molar \;mass}[/tex]

•Moles of solute C8H18 = [tex]\frac{\;Mass}{0.762 mol}[/tex]

Now,

Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]

Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{\;Volume \;of \;solution \;in \;litre}[/tex]

Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{405.576398 L}[/tex]

[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex]

Hence, [tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.

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Answer:

An expansion of suitable living space

Explanation:

Increase occurs in the population of the organism only occurs when there is a suitable environment present for that organism. Suitable environment means that place where all the needs of the organism are available such as food, water and shelter etc. If food and water are present in large amount and decrease in animals occurs that prey on that organism will increase the population of the organism.