The greater the amount of mass an object has, the more force is needed to move it.

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:

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.

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: c

Explanation:

Answer: C - Centuries

Explanation:

Answer:

Helium has atomic mass  4.002602.

So the answer to yr question is helium.

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:

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:

50x10^0

Explanation:

Answer:

Correct option is ₂⁴He

Explanation:

Uranium-238 undergo alpha decay and produce Th-234 and alpha particle.

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  + energy

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. It is also called helium nuclei. When atom undergoes the alpha emission the parent atom converted into the atom having mass number less than 4  and atomic number less than 2 as compared to parent atom.

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

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:

mostly skin diseases

Explanation:

because of greenhouse effects

Answer:

its b.

Explanation:

Answer:

Barium

Explanation:

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:

The force applied to the ball.

Explanation:

Hope this helps!! Good luck!!

Answer:

from solar radiation entering the atmosphere

Explanation:

The energy within the greenhouse effect is originated from solar radiation entering the atmosphere, hence option C is correct.

Solar radiation is a broad word for the electromagnetic radiation that the sun emits. It is also sometimes referred to as the solar resource or just sunshine.

A variety of devices can be used to collect solar radiation and transform it into useful forms of energy, such as heat and electricity.

Heat is reflected into the atmosphere from solar energy that has been absorbed in the earth's surface.

Greenhouse gases absorb a large portion of the heat as it travels through the atmosphere and is radiated back into space.

Therefore, the greenhouse effect is powered by solar radiation that reaches the atmosphere.

Learn more about solar radiation, here:

https://brainly.com/question/23338147

#SPJ5

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.

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:

Answer:

e

Explanation:

Answer:

Explanation:

Answer:

69%for the isotope that weighs 62.93 u and

31

%

for the isotope that weighs 64.93 u.

You can approach this problem by using a single equation; let's say the first isotope contributes to the relative atomic mass by a fraction

x

(

x

<

1

). SInce there are only 2 isotopes to consider, the fraction the other isotope contributes with will automatically be

1

−

x

.

Let's set up the equation

x

⋅

62.93

u

+

(

1

−

x

)

⋅

64.93

u

=

63.55

u

Solving this for

x

will produce

64.93

u

−

63.55

u

=

2

x

→

x

=

1.38

2

=

0.69

Multiplying these fractions (0.69 and 1 - 0.69 = 0.31) by 100% percent to get the results as a percentage will give

69

%

for the isotpe that weighs 62.93u and

31

%

for the one that weighs 64.93u.

Answer link

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:

They both have two valence electrons

Answer:

I am guessing because they are both metals

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 :

(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:

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:

Elements and compounds

Explanation:

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

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