8. What is the mass of 4.50 x 1022 Cu atoms?​

Answers

Answer 1

Answer:

4.7485 g

Explanation:

4.50 x 10^22 Cu atoms * (1 mol Cu / 6.022 x 10^23 Cu atoms) * 63.546 g Cu/(mol Cu) = 4.7485 g

In every mole of Cu, there are 6.022 x 10^23 atoms (Avogadro's number). The molecular weight of copper is 63.546 g/mol.


Related Questions

g A chemical equilibrium exists when: A chemical equilibrium exists when: there are equal amounts of reactants and products. the rate at which reactants form products is the same as the rate at which products form reactants. the sum of reactant and product concentrations equals one mole. reactants are completely changed to products. the rate at which reactants form products becomes zero.

Answers

Answer:

the rate at which reactants form products is the same as the rate at which products form reactants

Explanation:

There is still  a reaction happening just that the second one happens the opposite happens and keeps it at net 0

If a balloon has a volume of 1.696 L at a pressure of 2.11 0 atmospheres, what will be the volume of the balloon if the pressure is increased to 5.067 atmospheres?

Answers

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.

What is the Molar mass of zinc

Answers

Answer:

the molar mass of zinc is 65.38u or 65.38 grams(g).

Define, triple covalent bond

Answers

Answer:

it's a covalent linkage in which two atoms share three pairs of electrons as in nitrogen molecule or acetylene

HELP PLEASE Excluding the noble gas group, how does the number of valence electrons in an element influence it chemical reactivity?

Answers

well... the further an element is away from having a full valence shell, the more reactive they are, but all elements are reactive barring noble gases

Answer: A. Elements with intermediate numbers of valence electrons are the least reactive.

Explanation: I Quizzed

Help plz:)))I’ll mark u Brainliest

Answers

Answer:

82gS

Explanation:

2 Fe  + 3 S  →  Fe2S3

          ↓      ↑  

       mol → mol

        Fe         S

[tex]\frac{95 g Fe }{} \frac{1 mol Fe }{55.85 g Fe } \frac{3 mol S }{2 mol Fe } \frac{32.07 g S}{1 mol S} = 82 g S[/tex]

help!!!
1. How many grams of Ag+ are present in 2.24 grams of silver
sulfite?
grams Agt.
2. How many grams of silver sulfite contain 1.75 grams of Agt?
grams silver sulfite.

Answers

Answer:

1. 0.82 gram of Ag+

2. 4.79 g of Ag₂O₃S

Explanation:

From the given information:

Total amount of Ag₂O₃S = 2.24 grams

Atomic mass of Ag+ =107.86 g/mole

molar mass of Ag₂O₃S = 295.8  g/mole

The mass of the Silver (Ag) in grams is:

[tex]= Total\ amount \ of \ Ag^+ \times \dfrac{107.86 \ g/mol}{295.8 \ g/mol}[/tex]

[tex]=2.24 \times \dfrac{107.86 \ g/mol}{295.8 \ g/mol}[/tex]

= 0.82 gram of Ag+

2.

Here, the total amount of Ag₂O₃S = unknown

Atomic mass of Ag+ = 107.86 g/mole

molar mass of Ag₂O₃S = 295.8 g/mole

amount of Ag+  = 1.75 g

The mass of Ag₂O₃S = [tex]Total \ amount \ of \ Ag^+ \times \dfrac{295.8 \ g/mol}{107.86\ g/mol}[/tex]

[tex]=1.75 \times \dfrac{295.8 \ g/mol}{107.86\ g/mol}[/tex]

= 4.79 g of Ag₂O₃S

How to solve for K when given your anode and cathode equations and voltage

Answers

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

What is the pH of a solution with a concentration of 7.6 × 10–7 M H3O+?

0.993
6.12
7.88
8.34

Answers

Answer:

Ph = 6.12....

here ya go

Explanation:

-

The pH of the solution with a concentration of 7.6 × [tex]10^{-7}M[/tex] [tex]H_{3}O^{+}[/tex]will be 6.12.

What is pH?

The pH of water indicates how acidic or basic it is. The scale runs from 0 to 14, with 7 representing neutrality. Acidity is indicated by a pH less than 7, while a pH greater than 7 denotes a base. The relative number of free hydrogen, as well as hydroxyl ions in water, and hydroxyl ions in water is measured by pH .

It is known that ,[[tex]H_{3}O^{+}[/tex]]=[tex][H^{+} ][/tex]

pH can be calculated by the formula:

[tex]pH = -logH^{+}.[/tex]

Now, put the value of hydrogen ion in above equation

pH = -log[7.6×10^{-7}M]

      = -log(7.6)-log(10^{-7}

       = -0.88+7log 10

       = -0.88 +7

        = 6.12.

Therefore, the pH of the solution will be 6.12.

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................................................................

Answers

Answer:

..............,.,.,.,,..,,.,.,

…………………………………………………..

how to make 100 ml of 0.001 mM solution with 0.0405mM solution?

Answers

Answer:

Measure 2.47 mL of the stock solution (i.e 0.0405 mM) and dilute it to the 100 mL mark with water

Explanation:

To make 100 mL of 0.001 mM solution from 0.0405mM solution, we need to determine the volume of 0.0405mM solution needed. This can be obtained as follow:

Molarity of stock (M₁) = 0.0405 mM

Volume of diluted (V₂) = 100 mL

Molarity of diluted solution (M₂) = 0.001 mM

Volume of stock solution needed (V₁) =?

M₁V₁ = M₂V₂

0.0405 × V₁ = 0.001 × 100

0.0405 × V₁ = 0.1

Divide both side by 0.0405

V₁ = 0.1 / 0.0405

V₁ = 2.47 mL

Therefore, to make 100 mL of 0.001 mM solution from 0.0405mM solution, measure 2.47 mL of the stock solution (i.e 0.0405 mM) and dilute it to the 100 mL mark with water.

The lattice-like structure of a metal consists of negative metal ions in a "sea" of electrons.
O True
O False

Answers

Answer:

True

Explanation:

Metallic bonding is the type of bonding metal atoms undergo. The bond is formed through the electrostatic attraction between a lattice of positive ions and negative delocalized electrons. The lattice of cations is surrounded by a sea of delocalized electrons.

Help me find out which reaction is balanced

Answers

Answer:The answer is c

Explanation:

The answer is C
Explanation:
Since there are three C’s on the left side, there needs to be three C’s on the right.
The coefficient in front of CO2 is now 3CO2
Next, balance the H’s.
Since there are 8 H’s on the left, there needs to be 8 on the right.
Since H2O already has two H’s you just need to multiply 2 by 4 to get 8 H’s. The coefficient in front of the H2O needs to be 4.
Finally, balance the O’s.
In 3CO2, there are 6 O’s because 3 x 2 = 6.
In 4H2O, there are 4 O’s.
6 + 4 = 10
There are 10 O’s on the right, so there needs to be 10 on the left.
Since O2 already has 2 O’s, you need to multiply it by 5 because 5 x 2 = 10.
The coefficient in front of the O2 is 5.
The coefficient in front of C3H8 is 1 because it is already balanced.
The final balanced equation has the following coefficients:
1, 5, 3, 4

Iron ore exists as Fe2O3. In order to remove the oxygen and generate pure iron, the oxygen must be transferred to another molecule. Carbon monoxide can be mixed with iron ore and carbon dioxide is generated. Carbon monoxide is produced in the combustion of carbon with limited oxygen. Calculate the value of ΔS° for the oxidation of carbon to carbon monoxide,

2C (s, graphite) + O2 (g) --> 2CO (g)


A. +179.4 J/mol K

B. +408.6 J/mol K

C. -408.6 J/mol K

D. +395.8 J/mol K

Answers

the answer would be c

What is the volume of nitrogen dioxide (in L) is produced from the complete reaction of 16.87g of lead (II) nitrate at STP?

Answers

Given the reaction N2 + 3H2 -->2NH3, what volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia, assuming constant temperature and pressure? How would you calculate the mass in grams of hydrogen chloride produced when 4.9 L of molecular hydrogen at STP reacts with an excess of chlorine gas.?

a warm air is rising as cooler air es in to take its place. what is the name for that?​

Answers

Answer:

convection

hope this helps

have a good day :)

Explanation:

5
Which of the following is a factual statement about
hormones?
A They are the sole cause of mood swings
B
They cause boys' and girls' bodies to develop
C
They are a type of blood cell
D They are extremely difficult to deal with

Answers

Answer:

They cause boys' and girls' bodies to develop

Why are fossil fuels considered nonrenewable resources?

Answers

Answer:

They are considered nonrenewable because they are prehistoric animals that has been extinct therefore can't be renew.

because fossil fuels are the remains of dead plants and animals that died millions of years so there is only a certain amount on earth and once all of the resource has been used up we cannot make anymore. however renewable sources ex solar energy will never run out because there will never not be sun

Which part of the graph represents how much energy the reactants need to gain to become products?

Answers

Answer: The answer is F

The answer is F , F shows the amount of energy the reactants need to gain to become products .

What are Potential Energy Diagrams ?

A potential energy diagram shows the change in potential energy of a system as reactants are converted into products.

From the figure attached we can understand the Eₐ is the activation energy reactants need to get converted into products.

Now when we study the figure( potential energy Diagram) given in the question ,

The reactants are energy level shown by G

The total energy required to get converted into products is denoted by H while ,

H - G is the actual energy required which is denoted by F.

Therefore F shows the amount of energy the reactants need to gain to become products .

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half equation for oxygen to oxide ions, aluminium ions to aluminium, magnesium to magnesium ions

Answers

2mg(s)+02(g)=2mg0 that was the correct answer

which property of metal is used for making utensils??​

Answers

Answer:

Metals are good conductors of heat. Due to this property metals are used in the preparation of kitchen utensils. Aluminium is good conductor of heat and more over it is corrosion resistent. Due to these properties aluminium is used in making kitchen utensils.

Explanation:

1:How many moles of ammonia will be produced if 12 moles of nitrogen are used?

2:How many moles of nitrogen are required to react with 6 moles of hydrogen?

3:Honors: If there are 40 moles of nitrogen and 30 moles of hydrogen, what is the limiting reactant? Explain your answer.

4:Honors: What is the mass of hydrogen required to produce 80 g of ammonia?

Please, I really need help, so I can graduate

Answers

Answer:

See Explanation

Explanation:

The reaction equation is

3H2(g) + N2(g) -----> 2NH3(g)

1)If 1 mole of N2 yields 2 moles of NH3

12 moles of N2 will yield 12 * 2/1 = 24 moles of NH3

2) 3 moles of nitrogen reacts with 1 mole of nitrogen

6 moles of hydrogen will react with 6 * 1/3 = 2 moles of nitrogen

3) The limiting reactant yields the least amount of product

If 1 mole of nitrogen yields 2 moles of NH3

40 moles of nitrogen yields 40 * 2/1 = 80 moles of NH3

If 3 moles of hydrogen yields 2 moles of NH3

30 moles of hydrogen yields 30 * 2/3 = 20 moles of NH3

Hence hydrogen is the limiting reactant

4) Number of moles in 80g of NH3 = 80g/17g/mol = 4.71 moles

3 moles of hydrogen produces 2 moles of ammonia

x moles of hydrogen produces 4.71 moles of ammonia

x = 3 * 4.71/2 = 7.065 moles of hydrogen

Mass = 7.065 moles of hydrogen * 2 g/mol

Mass = 14.13 g of hydrogen

All of the following are examples of human organs EXCEPT the

1.heart
2.eyelashes.
3.skin
4. brain

It for science ​

Answers

Answer:

eyelashes are not a part of the the human organs

All of the following are examples of human organs EXCEPT the eyelashes.

Consider this reaction at equilibrium:

2BrNO (g) → 2NO (g)+ Br2 (g)

Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance.

a. NO is added to the reaction mixture
b. BrNO is added to the reaction mixture
c. Br2 is removed from the reaction mixture
d. Pressure is increased

Answers

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.

In osmosis: a. Knowing the osmotic pressure can help determine the molar mass of a solute dissolved in a solvent. b. The semipermeable membrane is used to change the freezing and melting points of a solution. c. Solutions cannot have identical osmotic pressures. d. Temperature does not affect the osmotic pressure of a solution. e. At least two of the above statements are correct.

Answers

Answer:

a)

Explanation:

Osmosis is a process in which there is movement of solvent molecules through a semipermeable membrane to wards the higher concentration of solute or lower concentration of solvent from a lower concentration of solute molecule. Osmosis can occur in different liquids and even in gases.

Also, in osmosis knowing the osmotic pressure can help determine the molar mass of a solute dissolved in a solvent.

write one other example (other than the one in your note) of ore of the following metals
a) Aluminium
b) Lead
c) Iron

Answers

an exemple of aluminium in its ore state is haemetite

PLEASE HELP, DUE AT 12:00

Answers

Answer:

5.C6.D

Explanation:

YONG ISA PO ETO HINDI KO PO ALAM TOH

g A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the manometer was 9.60 cm. Atmospheric pressure was 783 mm Hg. The pressure of the argon in the container was ________ mm Hg. Selected Answer: Incorrect 773 Answers: 882 793 661 773 Correct 96.0

Answers

Answer:

Answer: 882mmHg

Explanation:

In a closed-end manometer, the gas added is under a pressure that is measured against atmospheric pressure. The difference in pressure between both gases is equal to the difference in mercury levels. Thus, the pressure of the argon can be:

783 mmHg - 96.0mmHg = 687mmHg

783 mmHg - 96.0mmHg = 879mmHg

Based on the options, the possible answer (The nearest to the second value) is:

Answer: 882mmHg

Which statement best describes what occurs during a chemical reaction?

Answers

Chemical reactions involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules). The number of atoms before and after the chemical change is the same but the number of molecules will change

Answer:

The bonds in reactants break so that elements can rearrange form new products

Explanation:

A simplified model of an electromagnet is shown here, where a loop of wire is placed around an iron nail. The wire is
connected to a battery. A student wants to test the strength of the electromagnet by measuring how many paperclips
the electromagnet can pick up. In order to increase the strength of the electromagnet, some modifications to the
apparatus can be made. Which questions are most relevant to increasing the strength of the electromagnet? Select
ALL that apply.
A)
Will wetting the nail increase the number of paperclips that can
be picked up?
B)
Does insulating the nail increase the number of paperclips that
can be picked up?
C)
Does increasing the current in the battery increase the number of
paperclips that can be picked up?
D)
Will increasing the number of loops of wire around the nail
increase the number of paperclips that can be picked up?
E)
Will positioning the loops of wire closer together on the nail
increase the number of paperclips that can be picked up?
Forces in Nature

Answers

Answer:

CDE

Explanation:

If your on USA test perp

The questions are most relevant to increasing the strength of the electromagnet are Does increase the current in .....?, Will increasing the number of loops of wire around the.....? and Will positioning the loops of….? Therefore, option C, D and E are correct.

What are the properties of electromagnet ?

The characteristics known as electromagnetic properties determine how quickly a substance will absorb or emit electromagnetic radiations.

We may be familiar with electromagnetic radiations such as radio waves, microwaves, ultraviolet rays, infrared rays, and visible light rays.

Transverse waves characterize electromagnetic radiation.They move across fluctuating magnetic and electric fields so that they are perpendicular to the wave's path of propagation and at right angles to one other.

Thus, option C, D and E are correct.

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Why do you think the colonized country has a poorer HDI than the colonizer? Does the Indian Removal Act of 1830 uphold the Declaration of independence? why or why not? The original price of a shirt is $20. The sales price is $16.30. What percent is the sales price of the original price for the shirt? Gustavo is the league's home run leader. The probabilities for his total number of home runs for the season are as follows:\text{P(0-19 home runs}) = \dfrac14P(0-19 home runs)= 41 start text, P, left parenthesis, 0, negative, 19, space, h, o, m, e, space, r, u, n, s, end text, right parenthesis, equals, start fraction, 1, divided by, 4, end fraction\text{P(20-39 home runs}) = 45\%P(20-39 home runs)=45%start text, P, left parenthesis, 20, negative, 39, space, h, o, m, e, space, r, u, n, s, end text, right parenthesis, equals, 45, percent\text{P(40+ home runs}) = 0.3P(40+ home runs)=0.3start text, P, left parenthesis, 40, plus, space, h, o, m, e, space, r, u, n, s, end text, right parenthesis, equals, 0, point, 3Put the following events in order from least to most likely. PLZZZ!!! I promise to give brainliest to whoever can help me T^T3. What do fossils teach us? 4. are transition fossils important for proving evolution? 5. What can scientists assume about individuals with similar anatomy? 6. Compare and contrast homologous and analogous structures? 7. What do vestigial structures teach us? 8. What can scientists assume about species with similar embryos? 9. What is biogeography and why is it important for proving the theory of evolution? 10. Describe one area where microevolution can be observed today How are the ways in which elections are held at each of the three levels of government like each other? the second box has options in it that say in the center, on the left, and "on the right just need help with C would appreciate it Can someone please help me with these 2 questions, pleaseeeee explain them too. :) Im also giving brainliest and this is worth 15 points. Four soccer teams have the following recordsTeam 1: Won 5 of last 20 gamesTeam 2: Won 40% of the games they playTeam 3: Likelihood of winning next game is Team 4: Won 3 out of last 8 games URGENT: Testing shows that a sample of wood from an artifact contains 50% of theoriginal amount of carbon-14. Given that the half-life of carbon-14 is 5730years, how old is the artifact?O A. 22,920 yearsB. 11,460 yearsC. 5730 yearsO D. 2865 years The University of Arizona is monitoring the spread of a bacteria by placing 100 spores of the bacteria at the start of the project. The number, P, of the bacteria is expected to grow according to the differential equation dP over dt equals the product of 0.05 times P and the quantity 1 minus P over 2000, where P t is measured in days. When does the number of bacteria reach 1000? John's age increased by 11 is 5 less than 5 times his age. How old is he?If x represents John's age, which of the following equations could be used to solve this problem?O x + 11 - 5 = 5xO x + 11 = 5x -5O x + 11 = 5 - 5x Which two types of biotechnology share a common goal of producing future generations of a population that share a particular desired trait?A.DNA Fingerprinting and gene cloningB.bioremediation and reproductive cloningC.Selective breeding and genetic engineeringD.gene therapy and yeast fermentation 24 times 57 times 34 plus 50 PLEASE HELP!!!!!Whitney is buying a house next year. She applies for a $200,000 loan to be paid in 30 years. Her credit score is 575. Using the table, how much bigger will her monthly payment be than if her score were 850?$99.00$680.00$160.00$365.00 Qual o pas que se localiza no extremo sul e faz fronteira com a Malsia Why is special code needed for Find the measure of the angle indicated Lucy Lou went shopping a Hollister with her friends. Together they spent a mean price of $40 on 8sweaters. The first 7 sweaters cost $50, $55, $30, $35, $39, $40 and $42. How much, in dollars,does the 8th sweater cost?13++ON46