find out the, mass of 10^21 molecules of cu​

Answer:

a. NO is added to the reaction mixture ⇒ to the left

b. BrNO is added to the reaction mixture ⇒ to the right

c. Br₂ is removed from the reaction mixture ⇒ to the right

d. Pressure is increased ⇒ to the left

Explanation:

The reaction at equilibrium is the following:

2BrNO (g) → 2NO (g)+ Br₂ (g)

The left side is the reactants side (2 BrNO) and the right side is the products side (2 NO + Br₂).

a. NO is added to the reaction mixture

NO is a product, in the right side of the equation. If a product is added, the equilibrium will shift to the opposite side, to the left, to form more reactants and compensate for the addition.

b. BrNO is added to the reaction mixture

BrNO is a reactant, in the left side of the equation. If a reactant is added to a reaction at equilibrium, more product will be formed in compensation. Therefore, the equilibrium will shift to the right.

c. Br₂ is removed from the reaction mixture

Br₂ is a product, in the right side. If it is removed, the system will compensate for the remotion by forming more product, so the reaction will shift to the right.

d. Pressure is increased

Since both reactants and products are in the gas phase, the equilibrium is affected by pressure. If pressure is increased, the equilibrium will shift to the side of the reaction with the fewest number of moles. The reactants side (left) has 2 moles of BrNO while the products side (right) has 3 moles (1 mol NO + 1 mol Br₂ = 3 moles of gas). Therefore, the reactants side has the fewest number of moles, so the equilibrium will shift to the left.

Answer:

Natural materials are those that are found in nature and have not been made by humans. By comparison, synthetic materials are man-made and cannot be found in nature. Synthetic products are usually created in laboratories by mixing different chemicals, or prepared compounds and substances made in a laboratory.

Explanation:

Natural materials are those that are found in nature and have not been made by humans. By comparison, synthetic materials are man-made and cannot be found in nature. Synthetic products are usually created in laboratories by mixing different chemicals, or prepared compounds and substances made in a laboratory

Answer:

0.273504 grams

Explanation:

Charge Deposited = Current ×Time

q=It

Given: I= 17.0A, t= 15.0 seconds

Q= 17×15= 255 C

Since, 1 mole contains 96500C of charge deposition

Therefore, number of moles = 255/96500 = 0.00264 moles

Moreover, since Pb changes to Pb2+,

Hence number of moles of Pb deposited = 0.00264/2

= 0.00132

Also, Molar mass of Lead = 207.2 gm/mol

Therefore, the mass of lead deposited = 0.00132×207.2 = 0.273504 grams

.

Answer:

C

Explanation:

sorry if im wrong!!

Answer:

50%

Explanation:

35.0g/70.0g×100%

=50%

Answer:

B

Explanation:

this is because solution is the mixture of a solvent and a solute to give you a solution

Answer:

B. The mixture of one substance dissolved in another

Explanation:

Answer:

I think the answer is 2mL.

Explanation:

i hope it help.

Answer: Electrons

Explanation:

Explanation:

Depression in Freezing point

= Kf × i × m

where m is molality , i is Van't Hoff factor, m = molality

Since molality and Kf remain the same

depression in freezing point is proportional to i

i= 2 for CuSO4 ( CuSO4----------> Cu+2 + SO4-2

i=1 for C2h6O

i= 3 for MgCl2 ( MgCl2--------> Mg+2+ 2Cl-)

So the freezing point depression is highest for MgCl2 and lowest for C2H6O

so freezing point of the solution = freezing point of pure solvent- freezing point depression

since MgCl2 has got highest freezing point depression it will have loweest freezing point and C2H6O will have highest freezing point

Answer:

???! huhhhjhhh no I speak English

Explanation:

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Answer:

vifucivud UKvi uiiijhhh

Answer:

WHERE ARE THE CHOICES?

PLEASE MAKE SURE THAT YOUR QUESTION IS RIGHT BEFORE POSTING IT シ︎

Change of state of matter is not  an indication that a chemical change has taken place.

Matter is a substance which is made up of various types of particles  which occupy space and have inertia . All living things and objects  are made up of various types of particles  that occupy space and have inertia .

Depending on temperature and other factors matter is able to exist in different phases. Most common of which are solid, liquid and gas. Matter can exist in more than one state depending on the temperature and pressure .

State of matter can be changed  by heating or cooling and even by changing the applied pressure.When a state changes matter does not break rather its state changes though its chemical composition remains same.

Physical characteristics of matter are shape, color, size and temperature. Every matter is made up of elements which  cannot be broken down further by ordinary chemical reactions.

Learn more about matter,here:

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Answer: False, I think...

Explanation:

Answer:

True

Explanation:

It is uncontrolled

Answer:

The key difference between group 1 and group 2 elements is that all group 1 elements have unpaired electrons in their outermost orbital, whereas group 2 elements have paired electrons in their outermost orbital.

The hardness of group 2 elements are harder than group 1 elements because they have a strong metallic  bond and atoms are closely packed.

The group 1 elements are alkali metals and group 2 elements are alkaline earth metals. Group 1 contain 7 elements. Group 2 has 6 elements.

The difference between,  group 1 elements have unpaired electrons in their outermost orbital, whereas group 2 elements have paired electrons in their outermost orbital.

Thus, the hardness of group 2 elements are harder than group 1 elements because they have a strong metallic  bond and atoms are closely packed.

Learn more about group 1 and 2 elements

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Answer:

A crack in earth's crust is called a fault also known as a "fracture"

Answer:

Explanation:

Its a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances  rise  high into the atmosphere in which they mix and react with water, oxygen, and other chemicals to form more acidic pollutants.

Answer:

Explanation:

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

Answer:

and is capillaries

Explanation:

hope it helps

Answer:

::Due to the iron inside the earth.

Explanation:

Imagine a sphere of Iron, as big as two-third the size of the moon and as hot as 5700 Kelvin. That is the Earth’s core.

The iron core isn't in its liquid form even at that temperature because it is crushed under immense gravity. This core is surrounded by 2000 km of other metals like iron and nickel which are in their molten state.

The temperature is not the same at every point in this molten layer. The hotter and less dense matter rises up, and the warm denser matter sinks. This causes convectional currents in the interior of the Earth.

Because of the Earth’s spin, there is a force that established called the Coriolis force which causes swirling whirlpools here too.

This flow of molten metals produces electric currents which generate self-sustaining magnetic fields. And as a result of the Coriolis force, all these combined effects add up to produce one big magnetic field engulfing the Earth aligned in one direction.

Answer:

See Explanation

Explanation:

In thermodynamics theory the Free Energy (ΔG) of a chemical system is described by the expression ΔG = ΔG° + RTlnQ. When chemical system is at equilibrium ΔG = 0. Substituting into the system expression gives ...

0 = ΔG° + RTlnKc, which rearranges to ΔG° = - RTlnKc.  ΔG° in electrochemical terms gives ΔG° = - nFE°, where n = charge transfer, F = Faraday Constant = 96,500 amp·sec and E° = Standard Reduction Potential of the electrochemical system of interest.

Substituting into the ΔG° expression above gives

-nFE°(cell) = -RTlnKc => E°(cell) = (-RT/-nF)lnKc = (2.303·R·T/n·F)logKc

=> E°(cell) = (0.0592/n)logKc = E°(Reduction) - E°(Oxidation)

Application example:

Calculate the Kc value for a Zinc/Copper electrochemical cell.

Zn° => Zn⁺² + 2e⁻  ;    E°(Zn) = -0.76 volt  

Cu° => Cu⁺² + 2e⁻ ;    E°(Cu) =  0.34 volt

By natural process, charge transfer occurs from the more negative reduction potential to the more positive reduction potential.

That is,

           Zn° => Zn⁺² + 2e⁻ (Oxidation Rxn)

Cu⁺² + 2e⁻ => Cu°             (Reduction Rxn)

E°(Zn/Cu) = (0.0592/n)logKc

= (0.0592/2)logKc = E°(Cu) - E°(Zn) = 0.34v - (-0.76v) = 1.10v

=> logKc = 2(1.10)/0.0592 = 37.2

=> Kc = 10³⁷°² = 1.45 x 10³⁷

Answer:

the answer is B:

Explanation:

I hope it help.

A bimolecular reaction can be kinetically first order in behaviour provided one of the reactants is taken in such a large excess that its concentration may hardly change. Such a reactant will not contribute to the order. Thus, a bimolecular reaction will be of first order. These reactions are known as pseudo chemical reactions.

Answer:

I think that the volume will be 1.414

Explanation:

According to the formula of boyle's law P1 V1 = P2 V2

We have to find V2 so:

V2 = P2/P1 V1

By putting the values:

V2 = 5.06/2.11 * 1.696

V2 = 5.06/3.578

V2 = 1.414

Please give me brainliest, it will mean a lot to me.

Answer:

I know im late but its true

Explanation:

E2020 edge

Answer:

true

Explanation:

Answer:

[tex]m_{P_2Cl_5 }=239.2125gP_2Cl_5[/tex]

Explanation:

Hello there!

In this case, according to the reaction:

[tex]4P+5Cl_2\rightarrow 2P_2Cl_5[/tex]

Thus, since there is a 4:2 mole ratio of P to P2Cl5 and the molar mass of the later is 239.2125 g/mol, we obtain the following mass as the produced one:

[tex]m_{P_2Cl_5 }=2.00molP*\frac{2molP_2Cl_5}{4molP} *\frac{239.2125gP_2Cl_5 }{1molP_2Cl_5} \\\\m_{P_2Cl_5 }=239.2125gP_2Cl_5[/tex]

Regards!

Answer:

0.794 moles

Explanation:

Gviven that:

TO find the number of moles of nitrogen (N) using the formula:

number of moles  = mass /molar mass

where;

the molar mass for NH3 = 14 +( 1 × 3) = 17 g/mol

∴

number of moles of (N) = mass of N/molar mass

= 13.5 g/17 g/mol

number of moles of (N) = 0.794 moles

Removal of an electron from stable, fully filled orbital requires more energy than removal of electron from partially filled orbital. Thus, ionisation enthalpy for Mg is greater than ionisation enthalpy for Al. So, the correct order of first ionization enthalpies is: Na<Mg>Al<Si.

Answer:

So the percentage mass of Magnesium in ocean water is 0.13%.

Explanation:

brainliest pls

Answer:

1 watt is conduned by you ok