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The molarity of sodium chloride solution containing 284 g of NaCl in 2.20 L os solution would be 2.21 mole/Liter

Recall that:

Molarity = mole/volume

Also, Mole = mass/molar mass

Thus:

Mole of 284 g NaCl = 284/58.44 = 4.86 moles

Volume of the solution = 2.20 L

Therefore, the molarity of the solution can be calculated as;

molarity = 4.86/2.20 = 2.21 mole/Liter

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Answer:

V₂ = V₁ / T₁ * T₂ . If you prefer to set the final volume and want to estimate the resulting temperature, then the equation of Charles' law changes to: T2=T1/T1 multiplied by v^2.

Answer:

Explanation:

Answer:

they are more likely to get sick from the same disease

Black-footed ferrets are the most endangered mammal of North America. The problem that most black-footed ferrets today are closely related because they are more likely to get sick from the same diseases.

An endangered species are the species that can become extinct in the future, either worldwide.

The problem of the  black-footed ferrets today are closely related is that they are more likely to get sick from the same diseases.

Thus, the correct option is C.

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Answer:

to create or make energy Storage molecules

The sublevel would have electrons with the highest energy is 4p. Therefore, option D is correct.

The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.

The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal number of protons and electrons. One electron and one proton are all that the hydrogen atom has.

The words electric and ion are combined to form the word electron. In turn, electron is derived from the suffix -on, which is currently used to describe other subatomic particles, such as a proton or neutron.

Thus, option D is correct.

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There is a concentration of smelters, refineries, and foundries close to northern Belgium's copper mines because copper production is a bulk-reducing industry.

A bulk-reducing industry can be defined as a type of industry in which the raw materials (inputs) that are used for production weighs more than the finished good or final product.

This ultimately implies that, a bulk-reducing industry such as copper mines are established close to smelters, refineries, and foundries  because they make use of raw materials that weigh more than the finished good or final product.

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Answer:

ALPHA

Explanation:

Answer:

Chemistry plays a large role in obstetrics and gynecology. For instance, urinalysis requires an understanding of bilirubin levels and their conjugation with glucuronic acid to create a compound that is water soluble. This is passed through the blood stream and urinary system to create urobilirubin.

Explanation:

Answer:12 cm^3 becoz as per Gay-Lussac law

H2+Cl2---. 2HCl thus ratio is 1:1:2

Explanation:

The volume of hydrogen gas that combines with 12 cm³ of chlorine gas to form hydrogen chloride is 12 cm³.

To calculate the volume of hydrogen gas that combines with 12 cm³ of chlorine gas to form hydrogen chloride, we need to determine the stoichiometric ratio of the reactants based on their balanced chemical equation. The balanced equation for the formation of hydrogen chloride (HCl) is:

H₂ + Cl₂ → 2HCl

From the balanced equation, we can see that one molecule of hydrogen gas (H₂) reacts with one molecule of chlorine gas (Cl₂) to form two molecules of hydrogen chloride (2HCl).

Given that the volume of chlorine gas is 12 cm³, the volume of hydrogen gas required to react with it can be calculated as follows:

Volume of hydrogen gas = (Volume of chlorine gas) / (Stoichiometric ratio of hydrogen in the balanced equation)

Volume of hydrogen gas = 12 cm³ / 1 = 12 cm³

Therefore, the volume of hydrogen gas that combines with 12 cm³ of chlorine gas to form hydrogen chloride is 12 cm³.

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Explanation:

Answer:

I belive its d, not fully sure tho

The fission reaction released the most energy per amu when compared to the fusion reaction.

The amount of energy released per amu for fusion is given as 0.36 J/amu.

The amount of energy released per amu for fission is given as 0.85106383 J/amu.

From the different energy released per amu, it is obvious that  0.85106383 J/amu is greater than 0.36 J/amu.

Thus, the fission reaction released the most energy per amu when compared to the fusion reaction.

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Answer:

5=D

6=B

7=A

8=?????

1A= conduction

1B= radiation

1C= convection

3: C

4: A

Explanation:

2: The heat from the hot water is been transferred along the metal handle to the other end of the spoon by the process of CONDUCTION.

Answer: See below

Explanation:

(i) 2AI + 3 NHANO3 → 3 N2+ 6 H2O + Al2O3  ΔH = -2030kJ

From stoichiometric coefiicients, it can be seen that:

When 2 moles of Al react, change in enthalpy =  -2030kJ

So, when 3.4 moles of Al react, change in enthalpy =  -(2030/2) x 3.4  kJ = -3451 kJ

Therefore, the change in enthalpy is -3451 kJ

(ii) The change in enthalpy is negative. This means heat is released during the reaction.

So the reaction is exothermic

The enthalpy change with the reaction of 3.4 moles of aluminum in the reaction is -3045 kJ. The reaction is exothermic in nature.

The reaction in which the energy is released and the value of change in enthalpy is negative is an exothermic reaction. The reaction in which the energy is absorbed with the positive value of change in enthalpy.

For a balanced chemical reaction, for 2 moles of Aluminum reaction, the change in enthalpy has been -2030 kJ. The change in enthalpy for the reaction of 3.4 moles of aluminum is given as:

[tex]\rm 2\;mol\;Al=-2030 \;kJ\\\\3.4\;mol\;Al=\dfrac{-2030}{2}\;\times\;3\;kJ\\\\ 3.4\;mol\;Al=-3045\;kJ[/tex]

The change in enthalpy for 3.4 moles of aluminum reaction is -3045 kJ. The reaction is exothermic in nature.

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When the adhesin gene of Neisseria gonorrhoeae were mutated, the pathogen will be unable to attach to the host cells.

Pathogens may be defined as disease-causing agents. These are mostly microorganisms that infect the body of animals as well as humans.

Adhesin gene plays a very vital role in the attachment of pathogens to the host cells. It is the site where pathogen attack and attaches to host cells and then enters the body to play their function i.e. replication, a decline in the host immune system, and finally disease caused.

Therefore, when the adhesin gene of Neisseria gonorrhoeae were mutated, the pathogen will be unable to attach to the host cells.

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The reaction is an unbalanced redox reaction hence, the reaction  can be balanced by using the half-reaction method.

The term redox reaction refers to the reactionnin which electrons are transferred hence one specie is oxidized while the other specie is reduced.

Looking at the reation as shown, we can see that the reaction is an unbalanced redox reaction hence, the reaction  can be balanced by using the half-reaction method.

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Answer:

B

Explanation:

I answered all of them except 2 for you to do

Hope this helps :))

In Beaker A, 2.0 grams of zinc powder is mixed with 1.0 M HCl acid & in Beaker B, 2.0 grams of zinc powder is mixed with 6.0 M HCl acid so in beaker B reaction occur faster.

Rate of reaction of any chemical reaction gives idea about the speed of the completion of the given reaction, and rate of reaction is directly proportional to the concentration of the reactant species.

If the concentration of reactants increases then the rate of the reaction also increases. According to the question concentration of zinc powder is same in both beakers.

In beaker A, concentration of HCl is 1M and in Beaker B is 6M respectively so the rate of reaction is faster in beaker B.

Hence in beaker B reaction occur faster.

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Answer:

- 65 kJ

Explanation:

Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes

A+2B   +   B + 2C   ===>   C +D   + 2C+ D

   -20kJ      -45 kJ  ===>   3C + 2D

-65 kJ

Answer:

Bonding;lone

Explanation:

Answer:

10g

Explanation:

Answer:

C. gold beads and ornaments

Explanation:

The molecule with the highest boiling point is  H₂Te, while the molecule with the highest vapor pressure is H₂S.

Boiling point of any substnace is inverely proportional to its vapour pressure, and boilig point is directly proportional to the molecular mass of the substance.

In the given compounds H₂S, H₂Se and H₂Te molecular mass of Te is high and of Sulphur (S) is small. So the boiling point of H₂Te is highest and of H₂S is low so the vapor pressure of H₂S is highest.

Hence, H₂Te has the highest boiling point and H₂S has the highest vapor pressure.

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If the pH of a solution is 7, the pOH of the solution will be 7.

The concentration of the hydroxide ion (OH-) in a solution is measured by pOH.

This is a fundamental equation to calculate the pH and pOH.

pOH = 14 - ph

The pH is given 7

Putting the value of pH in the formula

pOH = 14 - 7 = 7

Thus, the pOH will be 7, if the pH of a solution is 7.

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Answer:

I think the answer would be C because energy is only transferred.

Explanation:

Hope this helps:)....if it's wrong then sorry for wasting your time and may God bless you:)

Answer:

i cant see the photo but i would love to help

Explanation: