Q1. Why is Cl2 a nonpolar molecule, but HCl is a polar molecule? Explain your reasoning.​

Answer:

Barium

Explanation:

Answer :

(A) The balanced chemical reaction will be:

[tex]2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)[/tex]

This reaction is a single replacement reaction.

(B) The balanced chemical reaction will be:

This reaction is a double displacement reaction.

(C) The balanced chemical reaction will be:

[tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]

This reaction is a combination reaction.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of an element present on reactant side must be equal to the product side.

Part (A):

The balanced chemical reaction will be:

[tex]2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)[/tex]

This reaction is a single replacement reaction in which the most reactive element displaces the least reactive element from its solution.

Part (B):

The balanced chemical reaction will be:

[tex]CaBr_2(aq) +H_2SO_4(aq)\rightarrow  CaSO_4(s)+2HBr(g)[/tex]

This reaction is a double displacement reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.

Part (C):

The balanced chemical reaction will be:

[tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]

This reaction is a combination reaction in which the two atoms combine to form a larger molecule.

Answer:

Kinetic theory of gases is a description of gas as a large number of non-stop random moving particles (atoms or molecules, generally without distinction in physics, are called molecules). Fast-moving molecules continuously collide with other molecules or the walls of the container. Molecular motion theory is to explain the macroscopic properties of gas, such as pressure, temperature, volume, etc., through the composition and motion of molecules. The theory of molecular motion believes that pressure does not come from static repulsion between molecules, as Newton’s conjecture, but from collisions between molecules that move thermally at different speeds.

The molecule is too small to be seen directly. The random movement of pollen particles or dust particles under the microscope-Brownian motion, is a direct result of molecular collisions. This can be used as evidence of the existence of the molecule.

Temperature is a measure of the average kinetic energy of the particles in a substance. Temperature of a volume of air represents the average kinetic energy of its molecules. Temperature is a measure of the average kinetic energy of a substance.

According to Kinetic Molecular Theory, the average kinetic energy of gas molecules is a function only of temperature. where T is the Kelvin temperature and k is Boltzmann's constant.

Answer:

Elements and compounds

Explanation:

Elements and compounds, mixtures are not chemically bonded and can be physically seperated

Answer:

What patterns do volcanoes form?

Volcanoes occur at convergent plate boundaries were subducting oceanic crust is melted. This magma rises through the crust to form volcanoes and volcanic island arcs. Volcanoes occur at divergent plate boundaries where upwelling magma pushes between plates (rift zones) as the plates move apart.

Explanation:

Mass, is amout of matter contained in body

it value remain constant

it cannot be zero

weight is gravitational force which attract body towards centre of earth

it value changes

it can be zero

Answer:

Mass of water produced is 22.86 g.

Explanation:

Given data:

Mass of hydrogen = 2.56 g

Mass of oxygen = 20.32 g

Mass of water = ?

Solution:

Chemical equation:

2H₂ + O₂   →  2H₂O

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 20.32 g/ 32 g/mol

Number of moles = 0.635 mol

Number of moles of hydrogen:

Number of moles = mass/ molar mass

Number of moles = 2.56 g/ 2 g/mol

Number of moles = 1.28 mol

Now we will compare the moles of water with oxygen and hydrogen.

                    O₂            :            H₂O

                     1              :             2

                  0.635        ;            2×0.635 =  1.27

                   H₂             :              H₂O

                    2              :              2

                 1.28            :           1.28

The number of  moles of water produced by oxygen are less thus it will be limiting reactant.

Mass of water produced:

Mass = number of moles × molar mass

Mass = 1.27 × 18 g/mol

Mass = 22.86 g

Answer:

22.88

Explanation:

correct have a g'day mate

Answer:

The force applied to the ball.

Explanation:

Hope this helps!! Good luck!!

Answer:

Time = 8.12 h = 0.34 day

Explanation:

First we find speed of water flow:

Speed = u = (3160 tons/s)(907.185 kg/1 ton)

u = 2866704.6 kg/s

also,

Density = (1 g/mL)(1 mL/1 x 10⁻⁶ m³)(1 x 10⁻³ kg/1 g)

Density = 1000 kg/m³

Now,

Volume Flow Rate = Speed/Density

Volume Flow Rate = (2866704.6 kg/s)/(1000 kg/m³)

Volume Flow Rate = 2866.7 m³/s

Now, we find volume of cylinder:

Volume = (Area)(Length)

Volume = (πd²/4)(L)

Volume = [(π)(0.53 m)²/4][236000 mi][1609.36 m/1 mi]

Volume = 83,792,823.82 m³

Now,

Time = Volume/Volume Flow Rate

Time = (83,792,823.82 m³)/(2866.7 m³/s)

Time = (29299.71 s)(1 h/3600 s)

Time = 8.12 h = 0.34 day

Answer:

B

Explanation:

The scientist had a wrong hypothesis?

Answer:

it would be C.

Explanation:

becuase the scientist would know what to to next time for his next experiment. even if it went wrong, he can try to get it right again.

Answer:

40.32 grams of solute required for the preparation of 1.5L of 0.32M NaHCO₃

Explanation:

Molar concentration or molarity is a measure of the concentration of a solute in a solution. Molarity is defined as the number of moles of solute present in one liter of solution.

Molarity is calculated by the expression:

[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case:

Replacing:

[tex]0.32 M=\frac{number of moles of solute}{1.5 L}[/tex]

Solving:

number of moles of solute= 0.32 M* 1.5 L

number of moles of solute= 0.48 moles

Being the molar weight of NaHCO₃ equal to 84 g / mole, the following rule of three can be applied: if there are 84 grams in 1 mole, how much mass is there in 0.48 moles?

[tex]mass=\frac{0.48 moles*84 grams}{1 mole}[/tex]

mass= 40.32 grams

40.32 grams of solute required for the preparation of 1.5L of 0.32M NaHCO₃

Answer:

feel slippery

Explanation:

Bases are certain metallic oxides, metallic hydroxides and aqueous ammonia. They typically have the following characteristics;

From the choices given, the fitting answer is that bases have a slippery feel.

Answer:

B) Feel slippery

Explanation:

Just did the assignment

Answer:

Ksp = 8.99x10⁻¹²

Explanation:

The solubility of Mg(OH)₂ is described with the reaction:

Mg(OH)₂(s) → Mg²⁺(aq) + 2OH⁻(aq)

The solubility product, Ksp, is:

Ksp = [Mg²⁺] [OH⁻]²

As you can see from the reaction, when 1 mole of Mg²⁺ is produced, 2 moles of OH⁻ are produced too, if [Mg²⁺] is 1.31x10⁻⁴M, [OH⁻] = 2.62x10⁻⁴M

Replacing:

Ksp = [Mg²⁺] [OH⁻]²

Ksp = [1.31x10⁻⁴M] [2.62x10⁻⁴M]²

The solubility product of the [tex]\rm Mg(OH)_2[/tex] has been [tex]\rm 8.99\;\times\;10^{-12}[/tex].

The balanced equation for the dissociation of Magnesium hydroxide has been:

[tex]\rm Mg(OH)_2\;\rightarrow\;Mg^2^+\;+\;2\;OH^-[/tex]

From the balanced chemical equation, dissociation of 1 mole magnesium hydroxide has been resulted in the 1 mole magnesium and 2 mole hydroxide ions.

Since, given magnesium concentration, [tex]\rm Mg^2^+=1.31\;\times\;10^-^4\;M[/tex]

The concentration of hydroxide ion, [tex]\rm OH^-[/tex] will be:

[tex]\rm 1\;M\;Mg^2^+=2\;M\;OH^-\\1.31\;\times\;10^-^4\;M=1.31\;\times\;10^-^4\;\times\;2\;M\;OH^-\\1.31\;\times\;10^-^4\;M=2.62\;\times\;2\;M\;OH^-\\[/tex]

The solubility product (ksp) of the reaction has been given as:

[tex]ksp=\rm [Mg^2^+]\;[OH^-]^2[/tex]

Substituting the values for ksp:

[tex]ksp\;=\rm [1.31\;\times\;10^-^4]\;[2.62\;\times\;10^-^4]^2\\\textit ksp=8.99\;\times\;10^-^1^2[/tex]

The solubility product of the reaction has been [tex]\rm 8.99\;\times\;10^{-12}[/tex].

For more information about solubility product, refer to the link:

https://brainly.com/question/1163248

Answer:

e

Explanation:

Answer:

its b.

Explanation:

Answer:

Explanation:

Answer:

mostly skin diseases

Explanation:

because of greenhouse effects

Please do mark me as Brainiest. I would be so happy!!! Here's your answer....

Answer:

D.)

Explanation:

Compact fluorescent lamps, or CFLs, use 75 percent less energy than a traditional incandescent bulb, but they never quite caught on for home use.

Have a great rest of your day!

Answer:

Theoretical yield of CaCO₃ is 2.002 g.

Explanation:

Given data:

Mass of K₂CO₃ = 2.5 g

Mass of CaCl₂ = 2 g

Theoretical yield of CaCO₃ = ?

Solution:

Chemical equation:

K₂CO₃ +  CaCl₂      →     CaCO₃ + 2KCl

Number of moles of K₂CO₃:

Number of moles = mass/molar mass

Number of moles = 2.5 g/ 138.205 g/mol

Number of moles = 0.02 mol

Number of moles of CaCl₂:

Number of moles = mass/molar mass

Number of moles = 2 g/ 110.98 g/mol

Number of moles = 0.02 mol

Now we will compare the moles of CaCO₃ with K₂CO₃ and CaCl₂.

                CaCl₂             :              CaCO₃

                    1                  :                  1

                  0.02              :              0.02

                 K₂CO₃            :               CaCO₃

                     1                 :                   1

                   0.02             :               0.02

Theoretical yield of CaCO₃:

Mass = number of moles × molar mass

Mass = 0.02 mol × 100.1 g/mol

Mass =  2.002 g

Theoretical yield of CaCO₃ is 2.002 g.

Answer: c

Explanation:

Answer: C - Centuries

Explanation:

Answer:

50x10^0

Explanation:

Answer:

The properties of matter include any traits that can be measured, such as an object's density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature, and more. We need to study all these traits since every single object around us, including us, is made of matter. Without matter we wouldn't exist; it would be infinite darkness everywhere.

Answer:

Extent of reaction = 95.9 mol.

Fractional conversion of the limiting reactant = 0.846.

Percentage by which the other reactant is in excess = 25.2 %.

Explanation:

Hello.

In this case, for the undergoing chemical reaction:

[tex]CH_2=CH_2+HBr\rightarrow CH_3-CH_2Br[/tex]

We can write the mole balance per species also including the extent of the reaction:

[tex]CH_2=CH_2:A\\\\HBr: B\\\\CH_3-CH_2-Br:C[/tex]

[tex]x_AP=z_AF-\epsilon \\\\x_BP=z_BF-\epsilon \\\\x_CP=\epsilon[/tex]

Considering that P is the flow of the outlet product. In such a way, writing the data we know, we can write:

[tex]0.33P=z_A*265-\epsilon \\\\0.103P=z_B*265-\epsilon \\\\0.567P=\epsilon[/tex]

Whereas we can replace the C2H5Br mole balance in the others mole balances:

[tex]0.33P=z_A*265-0.567P \\\\0.103P=z_B*265-0.567P\\\\\\z_A*265-0.897P=0\\\\z_B*265-0.67P=0[/tex]

By knowing that [tex]z_B=1-z_A[/tex], we can write:

[tex]z_A*265-0.897P=0\\\\(1-z_A)*265-0.67P=0\\\\\\z_A*265-0.897P=0\\\\-z_A*265-0.67P=-265[/tex]

Thus, solving for P and [tex]z_A[/tex], we obtain:

[tex]z_A=0.572\\\\P=169.11mol[/tex]

It means that the extent of the reaction is:

[tex]\epsilon=0.567P=0.567*169.11mol\\\\\epsilon=95.9mol[/tex]

For the limiting reactant, due to the 1:1 mole ratio between the reactants, it is the one having the smallest flow rate:

[tex]F_A=0.572*265mol=151.58mol\\\\F_B=265mol-151.58mol=113.42mol[/tex]

It means that the limiting reactant is B which is HBr, whose fractional conversion is:

[tex]X_B=1-\frac{0.103*169.11}{113.42mol}\\ \\X_B=0.846[/tex]

Finally, the percentage by which the other reactant is in excess, corresponds to:

[tex]\% excess =(1-\frac{113.42mol}{151.58mol})*100\%\\ \\\%excess=25.2\%[/tex]

Regards.

Answer:

hello your question lacks the required reaction pairs below are the missing pairs

Reaction system 1 :

A + B ⇒ D  [tex]-r_{1A} = 10exp[-8000K/T]C_{A}C_{B}[/tex]

A + B ⇒ U [tex]-r_{2a} = 100exp(-1000K/T)C_{A} ^\frac{1}{2}C_{B} ^\frac{3}{2}[/tex]

Reaction system 2

A + B ⇒ D  [tex]-r_{1A} = 10exp( -1000K/T)C_{A}C_{B}[/tex]

B + D ⇒ U  [tex]-r_{2B} = 10^9exp(-10000 K/T) C_{B}C_{D}[/tex]

Answer : reaction 1 : description of the reactor system : The desired reaction which is the first reaction possess a higher activation energy and higher temperature is required to kickstart reaction 1

condition to maximize selectivity : To maximize selectivity the concentration of reaction 1 should be higher than that of reaction 2

reaction 2 :

description of reactor system : The desired reaction i.e. reaction 1 has a lower activation energy and lower temperatures is required to kickstart reaction 1

condition to maximize selectivity:

to increase selectivity the concentration of D should be minimal

Explanation:

Reaction system 1 :

A + B ⇒ D  [tex]-r_{1A} = 10exp[-8000K/T]C_{A}C_{B}[/tex]

A + B ⇒ U [tex]-r_{2a} = 100exp(-1000K/T)C_{A} ^\frac{1}{2}C_{B} ^\frac{3}{2}[/tex]

the selectivity of D is represented  using the relationship below

[tex]S_{DU} = \frac{-r1A}{-r2A}[/tex]

hence SDu = 1/10 * [tex]\frac{exp(-800K/T)}{exp(-1000K/T)} * C_{A} ^{0.5} C_{B} ^{-0.5}[/tex]

description of the reactor system : The desired reaction which is the first reaction possess a higher activation energy and higher temperature is required to kickstart reaction 1

condition to maximize selectivity : To maximize selectivity the concentration of reaction 1 should be higher than that of reaction 2

Reaction system 2

A + B ⇒ D  [tex]-r_{1A} = 10exp( -1000K/T)C_{A}C_{B}[/tex]

B + D ⇒ U  [tex]-r_{2B} = 10^9exp(-10000 K/T) C_{B}C_{D}[/tex]

selectivity of D

[tex]S_{DU} = \frac{-r1A}{-r2A}[/tex]

hence Sdu = [tex]1/10^7 * \frac{exp(-1000K/T)}{exp(-10000K/T)} *\frac{C_{A} }{C_{D} }[/tex]

description of reactor system : The desired reaction i.e. reaction 1 has a lower activation energy and lower temperatures is required to kickstart reaction 1

condition to maximize selectivity:

to increase selectivity the concentration of D should be minimal

Answer:

B. 65

Explanation:

arrange your numbers as:

63,64,66,69

add 64 and 66 together to get 130 then divide by 2

-or just think about what number is between 64 and 66

Answer:

They both have two valence electrons

Answer:

I am guessing because they are both metals

Answer:

Helium has atomic mass  4.002602.

So the answer to yr question is helium.

Answer:

i think the answer is true pls mark branliest

Explanation:

Answer:

its true! earth quakes do form huge gaps in the earth surface

Explanation: