Lewis based his theory of bonding on? Is this correct

Answer:

7.71 × 10⁻⁴ M/s

Explanation:

The initial rate of the reaction can be expressed by using the formula:

[tex]\dfrac{\Delta [O_2]}{\Delta t}[/tex]

where the number of moles of O₂ = [tex]\dfrac{PV}{RT}[/tex]

where;

Pressue P = 1.00 atm

Volume V =5.74mL =  (5.74 /1000) L

Rate R = 0.082 L atm/mol.K

Temperature = 298 K

[tex]= \dfrac{1.00 \ atm \times \dfrac{5.74 }{1000}L}{0.082 \ L \ atm/mol.K \times 298 K}[/tex]

= 2.35 × 10⁻⁴ mol

Δ[O₂] = [tex]\dfrac{moles \ produced - initial \ mole}{\dfrac{5.08 }{1000}L }[/tex]

Δ[O₂] = [tex]\dfrac{2.35 \times 10^{-4} M - 0 M}{\dfrac{5.08 }{1000}}[/tex]

Δ[O₂]  = 0.04626 M

The initial rate = [tex]\dfrac{\Delta [O_2]}{\Delta t}[/tex]

= [tex]\dfrac{0.04626}{60}[/tex]

= 7.71 × 10⁻⁴ M/s

Answer:

A. high specific heat.

Explanation:

Specific heat defines the heat or thermal capacity of a substance.

Water has a high specific heat which adds an advantage to a heat exchanger. Due to the high heat or thermal capacity of the water heat exchanger can transfer a huge amount of heat between two or more fluids.

Hence, the correct answer is "A. high specific heat."

Answer:

A. high specific heat.

Explanation:

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

We have

[tex]V_2 = \frac{300 \times 2}{7} = \frac{600}{7} \\ = 85.714285...[/tex]

We have the final answer as

Hope this helps you

Answer:

What subject is this for?

Explanation:

Answer:

Organic

Explanation:

Edge student

Answer:

Definition: Fluid that can act as a liquid or as a solid depending on the pressure applied on it.

Explanation:

A fluid that incorporates time in a solid and liquid model is a non-Newtonian fluid. This type of fluid can behave as a solid or as a liquid depending on the pressure that is applied on it. This is different from normal fluids that remain the same regardless of the pressure they are subjected to. In the case of non-Newtonian fluids, when submitted to pressure, they are presented as solids, but without pressure, they are presented as liquids. This feature can be seen even within the same system.

Answer:

because the amount of pigments change as thee leaves prepare to fall from the trees

Answer:

I would say turns litmus paper red.

Explanation:

I finished the quiz, and got it right! Hope this helps!

Answer:

d The energy from the sun heated the water, causing it to evaporate.

Explanation:

The correct description of what happened is that the energy from the sun heated the water and causes it to evaporate completely.

Evaporation is a phase change process in which liquid is converted to gases. This occurs when a liquid gains considerable amount of energy. The molecules then breaks free from the bond holding compound place.

Answer:

The answer is 16

Explanation:

Answer:

Explanation:

Spectator ions are ions in a solution/reaction that do not take part in a chemical reaction (hence are called "spectator" ions). They can be identified when they are found both in the reactant and product sides.

The reaction between lead(II) nitrate, Pb(NO₃)₂ and sodium chloride, NaCl is illustrated below

Pb(NO₃)₂ + 2NaCl ⇒ PbCl₂ + 2NaNO₃

According to solubility rules, all the compounds above (with the exception of PbCl₂) are all soluble and would dissociate when involved in a reaction.

Hence, the ionic equation based on the description above will be

Pb²⁺ + 2NO₃⁻ + 2Na⁺ + 2Cl⁻  ⇒  PbCl₂ + 2Na⁺ + 2NO₃⁻

From the above ionic equation, it can be noted that both 2NO₃⁻ and 2Na⁺ are found on both the reactant and product side and are hence the spectator ions.

Answer:

Explanation:

We are to carefully sketch a curve that relates to the potential energy of two O atoms versus the distance between their nuclei.

From the diagram, O2 have higher potential energy than the N2 molecule. Because on the periodic table, the atomic size increases from left to right on across the period, thus O2 posses a larger atomic size than N2 atom.

Therefore, the bond length formation between the two O atoms will be larger compared to that of the two N atoms.

Answer:

The first one is balanced, but the second one is unbalanced.

Explanation:

Second one is unbalanced because there is an additional H and Cl on the right side. To fix it you would add a two in front of the HCl on the left side.

Answer:

The value is           [tex]k = 7.111 \  moles  [/tex]

Explanation:

Generally the reaction between ethylene and water vapor is

[tex]CH_2CH_2_{(g)} \ \ \   +\ \ \ \ H_2O\ \ \  \rightarrow\ \ \ \  C_2H_5OH_{(g)}[/tex]

From the question the initial number of moles of  ethylene  is 33.mol

                                the initial   number of moles of water vapor is 16.mol

So

At initial

[tex]CH_2CH_2_{(g)} \ \ \   +\ \ \ \ H_2O\ \ \  \rightarrow\ \ \ \  C_2H_5OH_{(g)}[/tex]

  33.mol                     16.mol                     0 mols

Now at first  equilibrium the number of moles of  ethylene  is 26.8mol

                                         the number of moles of  water vapor is 9.8mol

So the number of moles of  ethanol is  33-26.8 =  6.2 mol

So at equilibrium

[tex]CH_2CH_2_{(g)} \ \ \   +\ \ \ \ H_2O\ \ \  \rightarrow\ \ \ \  C_2H_5OH_{(g)}[/tex]

26.8mol                     9.8mol                   6.2 mol

Generally the equilibrium constant is mathematically represented as

   [tex]K =  \frac{[C_2H_5OH]}{[CH_2CH_2] [H_2O]}[/tex]

Here   [tex][C_2H_5OH][/tex] is the concentration of ethanol which is mathematically represented as

  [tex][C_2H_5OH]  =  \frac{6.2 \ mol}{100L}[/tex]

=>  [tex][C_2H_5OH] =   0.062 mol/L [/tex]

Also

     [tex] [CH_2CH_2]  =  \frac{26.8 \ mol}{100L}[/tex]

      [tex] [CH_2CH_2]  =  0.268 mol/L[/tex]

Also

     [tex][H_2O]  =  \frac{ 9.8 \ mol}{100L}[/tex]

      [tex] [H_2O]  =  0.098 mol/L[/tex]

So

      [tex]K =  \frac{0.062}{0.268*  0.098 }[/tex]

        [tex]K = 2.3606 [/tex]

From the question we are told that 8 moles was added to ethylene

So  volume of ethylene becomes  26.8 + 8 =  34.8 moles

So after the addition

[tex]CH_2CH_2_{(g)} \ \ \   +\ \ \ \ H_2O\ \ \  \rightarrow\ \ \ \  C_2H_5OH_{(g)}[/tex]

    34.8mol                9.8mol                    6.2 mol  

At the second equilibrium

[tex]CH_2CH_2_{(g)} \ \ \   +\ \ \ \ H_2O\ \ \  \rightarrow\ \ \ \  C_2H_5OH_{(g)}[/tex]

 (34.8- z)mol              (9.8-z)mol              ( 6.2+z) mol      

Generally the equilibrium constant is mathematically represented as

       [tex]K =  \frac{[C_2H_5OH]}{[CH_2CH_2] [H_2O]}[/tex]

Here

   [tex][C_2H_5OH][/tex]  is now equal to  

       [tex][C_2H_5OH] =  \frac{6.2+z}{100}[/tex]

       [tex][CH_2CH_2]=  \frac{ 34.8- z }{100}[/tex]

         [tex][CH_2CH_2]=  \frac{ 9.8-z }{100}[/tex]

So m

    [tex]2.3606 =  \frac{  \frac{6.2+z}{100}}{[ \frac{34.8- z }{100}] [\frac{ 9.8-z  }{100}]}[/tex]

[tex]2.3606 =  \frac{  \frac{6.2+z}{100}}{\frac{ z^2 -44.6 z + 341.04}{10000} }[/tex]

=>    [tex]2.3606 = \frac{ 620 - 100z}{z^2 -44.6 z + 341.04}[/tex]

=>      [tex]2.3606z^2 - 105.283 z + 805.05 =620 - 100z[/tex]

=>      [tex]2.3606z^2 - 205.283 z + 185.059 = 0[/tex]

Multiply through by minus

=>      [tex]2.3606z^2 -108.498z + 3336.7 = 0[/tex]

Solving this using quadratic equation

So  [tex]z = 0.911[/tex]

Hence the number  of moles of  ethanol present at the second equilibrium is

        [tex]k = 0.911 +6.2 [/tex]

        [tex]k = 7.111 \  moles  [/tex]

Answer:

a. wt% A / Atomic Mass A / (wt% A / Atomic Mass A + wt% B / Atomic Mass B).

b. 11.74%

Explanation:

a. Weight percent is the mass of an element in 100g of the alloy. Atomic percent could be taken as the ratio between moles of an element and the total moles of the alloy.

Assuming a basis of 100g, the moles of A and B (The two elements in the alloy), are:

Moles A:

wt% A / Atomic Mass A

Moles B:

wt% B / Atomic Mass B

And atomic percent of A is:

b. Atomic fraction of Cu in the alloy is (Molar mass Cu: 63.55g/mol; Molar mass Ag: 107.87g/mol):

7.25wt% / 63.55g/mol / (7.25wt% / 63.55g/mol + 92.5wt% / 107.87g/mol)

Atomic fraction Cu = 0.1174 = 11.74%

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 14.5 × 5

We have the final answer as

Hope this helps you

Answer:

Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together

Explanation:

Answer:

red bricks

Explanation:

right on edg 2020

Red bricks should you use so that the area is cool in terms of temperture. Therefore, option B is correct.

Red bricks can be used in the construction of structures such as buildings, foundations, arches, pavement, and bridges. These can also be used for aesthetic purposes such as landscaping, face work, and a variety of other architectural purposes.

Traditional red bricks are saw to be more robust, and structures constructed with them are stronger than hollow block structures.Red brick can be warm, with rust or terracotta undertones. They could also be cool and more burgundy.

Thus, Red bricks should you use so that the area is cool in terms of temperture, option B is correct.

To learn more about the red bricks, follow the link;

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Answer:

Check the image in the file attached below.

Explanation:

The objective of this question is to use the diagram provided to indicate the distance that corresponds to the bond length of the N2 molecule by placing X on the horizontal axis.

The bond length shows the distance of the bonds between the nuclei of the bonded atoms between the N2 molecule and O2 molecule. From the diagram, we can see that the bond length of O2 shows a greater tendency over the N2 molecule and it also have higher potential energy than the N2 molecule.

The distance corresponding to the bond length of N₂ is indicated in the attached graph.

Bond length represents/shows the bond distance between the atoms that are chemically bonded in the molecule ( N₂ ) . The bond distance ( average distance ) is measured  from the nucleus of one binding atom toward  another.

The bond length determines how easy or difficulty atoms bonded in a molecule can be separated. i.e. the longer the bond length the easier it is to separate chemically bonded atoms in a molecule.

Hence we can conclude that the distance corresponding to the bond length of N₂ is indicated in the attached graph.

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Answer:

C

Explanation:

Answer:

✔️Ionic bonds form between metal atoms and nonmetal atoms.

✔️The less electronegative atoms transfers one or more electrons to the more electronegative atom

✔️The metal atom forms a cation and the nonmetal atom forms an anion.

✔️The attraction between ions with an opposite charge forms an ionic bond.

Explanation:

Ionic bond refers to the bond formation which occurs when there is complete and permanent transfer of electrons from one metal atom to another non-metal atom. The metals, which are electropositive (less electronegative) loose their electrons while the non-metals, which are less electropositive (more electronegative) gain the electrons.

When the metal atom looses electrons, they form cations(become positively charged) while non-metal atom forms anions (become negatively charged). When the opposite charges attract each other, they form ionic bond.

Answer:

✔️ Ionic bonds form between metal atoms and nonmetal atoms.

✔️ The less electronegative atoms transfers one or more electrons to the more electronegative atom.

✔️ The metal atom forms a cation and the nonmetal atom forms an anion.

✔️ The attraction between ions with an opposite charge forms an ionic bond.

Grams of BW

i think thats irtu9rgirg

Independent variable in an investigation is the variable is does not depends on any other variable and on which we can have the control. Hence, the grams of BW is the independent variable here.

In an experiment the parameters which changes by control or depending on other changes are called variables. There are two kinds variables namely dependant and independent variables.

The dependant variables are those variable which depends upon other variables and whose changes are studying with respect to certain parameters.

Independent variables does not depends on other variable and can be controlled by the researcher. Here, we are studying the % of developing cold with respect to the amounts of BW. The changing variable is BW amount on which the percentage of cold depends.

Therefore, the independent variable is grams of BW and dependant variable is % development of cold.

To find more on independent variables, refer here:

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Answer:

The cohesive forces of mercury are much stronger than its adhesive forces.

Explanation:

Cohesive forces are forces that exist between the particles that compose  a substance while adhesive forces refer to forces that exist between the particles of a substance and those of another substance.

The cohesive forces in mercury far outweigh the adhesive forces between the mercury drops and glass. Hence when mercury is put into a capillary  tube, its  meniscus is convex  because cohesive forces tend to draw the liquid mercury into a drop.

Hence, the surface tension in mercury makes the mercury in the capillary tube to fall below the height of the mercury in the dish.

Answer:

The formula of ammonium fluoride is NH4F.

Explanation:

1 The atoms in each ion are bonded together covalently to form a single unit.

Wrong!

⇒ The atoms in an ion compound are linked together by an ionic bond.

2 The charge is distributed over the entire ion.

Wrong!

Ions have taken in or given up electrons. This happens in the atomic shell.

3 The formula of ammonium fluoride is NH4F.

Right!

4 The formula of potassium sulfate is K2SO

Wrong!

The formula for potassium sulfate is K2SO4.

Answer:

The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow, like toothpaste. The lithosphere rests on the asthenosphere

Explanation:

Answer:

pretty sure its B

Explanation:

might not be tho but pretty sure it is

Answer:

C

Explanation:

Answer:

a. H₂CO₃(aq) + KOH(aq) ⇄ K₂CO₃(aq) + H₂O(l)

b. 0.603 M

Explanation:

Step 1: Write the neutralization reaction

H₂CO₃(aq) + KOH(aq) ⇄ K₂CO₃(aq) + H₂O(l)

Step 2: Calculate the reacting moles of KOH

22.9 mL of 1.430 M KOH react.

0.0229 L × (1.430 mol/L) = 0.0327 mol

Step 3: Calculate the reacting moles of H₂CO₃

The molar ratio of H₂CO₃ to KOH is 1:1. The reacting moles of H₂CO₃ are 1/1 × 0.0327 mol = 0.0327 mol.

Step 4: Calculate the molarity of H₂CO₃

0.0327 moles of H₂CO₃ are in a volume of 54.2 mL. The molarity of H₂CO₃ is:

M = 0.0327 mol/0.0542 L = 0.603 M