how many moles are in 500 g of copper

Answers

Answer 1
The answer to your question is 7.9 moles

Related Questions

A sample of 4.0 mol of neon gas at a pressure of 2.5 atm is injected into a container at
25°C. What is the volume of the container?

Answers

Answer:

The volume of container is 39.14 L.

Explanation:

Given data:

Number of moles of neon = 4.0 mol

Pressure of gas = 2.5 atm

Temperature of gas = 25°C

Volume of container = ?

Solution:

we will use general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

25+273 = 298 K

Now we will put the values in formula.

2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K ×  298 K

V = 97.86 atm.L /2.5 atm

V = 39.14 L

The volume of container is 39.14 L.

Why is governmental funding of research important?

A. The government makes sure all scientists get the same amount of
money.

B. The government grants funding only to scientists whose research
won't harm people.

C. Scientists work for the government, which is where they get their
money from.

D. The government determines what is right and wrong for everyone.

Answers

Answer:

D. The government determines what is right & wrong for everyone

Explanation:

Manny designs an experiment to learn about erosion. First, he sets up three long trays with equal-sized piles of sand at one of each tray. Then he sets up Tray A so that it lays flat on a table. He elevates the end of Tray B that holds the sand by 5 cm. Next, he elevates the end of Tray C that holds the sand in each tray. Finally, he observes and measures how far sand is carried by the way water poured into each tray.

Answers

Answer:

Height of tray

Explanation:

Which of the following is the correct Lewis Dot Structure for N2?
PHOTO ABOVE

please help I got it wrong so is not D

Answers

The answer is A hope this helped

The correct Lewis Dot Structure for Nitrogen is structure C. Therefore, option C is correct.

What is lewis dot structure ?

The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms.

Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.

In Nitrogen molecule, every nitrogen atom has five valence electrons and there is a triple bond between the two nitrogen atoms. Thus, the correct lewis dot structure is; :N⋮⋮N: .

Thus, option C is correct.

To learn more about the lewis dot structure, follow the link;

https://brainly.com/question/4144781

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please help if you can. thank you.​

Answers

We got Rick rolledXD
Is there any multiple choice ?

Compound Lattice Energy (kJ/mol) Compound Lattice Energy (kJ/mol) LiF 1030 NaCl 788 LiCl 834 MgCl2 2326 LiI 730 AlCl3 5376 Lattice Energy 1 Lattice Energy 2 For the lattice energies given above … in Lattice Energy 1, explain why LiF has a greater lattice energy than LiI in Lattice Energy 2, explain why NaCl has a smaller lattice energy than AlCl3

Answers

Answer:

The lattice energy decreases down the group and increases across the period, therefore, the lattice energy of LiF > lattice energy of LiI, and the lattice energy of NaCl < the lattice energy of AlCl₃

Explanation:

The given parameters are;

Compound [tex]{}[/tex]                                    Lattice Energy (kJ/mol)

LiF  [tex]{}[/tex]                                                     1030

NaCl  [tex]{}[/tex]                                                  788

MgCl₂  [tex]{}[/tex]                                                2326

LiI  [tex]{}[/tex]                                                       730

AlCl₃   [tex]{}[/tex]                                                  5376

Lattice is the energy that must be added in order to split one mole of a ionic solid compound into gaseous ions

Given that the force of attraction between charges is inversely proportional to the square of the distance separating the charges, we have that as the atomic radius increases progressively down the group, the lattice energy decreases, therefore, LiF which has a shorter inter nuclear distance than LiI due to fluorine, F, being higher up on the periodic table than iodine, I, has a greater lattice energy than LiI

Similarly, given that the atomic radius decreases across the period, and that sodium, Na, comes before aluminum, Al, as we move across period 3, of the periodic table, the inter nuclear distance between atoms of in NaCl is larger than the internuclear distances between the atoms of AlCl₃, as well as the presence of more chlorine atoms in AlCl₃ than in NaCl, the lattice energy of NaCl is smaller than the lattice energy of AlCl₃.

A gold cube is 150.00 mm long, 10.00 cm wide, and 0.95 m thick. If gold has a density of 19.3g/cm3. Calculate the mass of the gold cube.

Help?

Answers

Answer:

V = l * w * h

V = 150.00 mm x 1cm/10 mm x 10.00 cm x 0.95 m x 100 cm/1 m = 1.4 x 104 cm3 D = M/V

M = D * V = 19.3 g/cm^3 * 1.4 * 104 cm^3 = 2.7 x 10^5 g = 270000 grams

How many neon atoms are in 2.7 moles of neon ?

Answers

Answer:

2.7 moles of neon contain 16.3 × 10²³ atoms of neon.

Explanation:

Given data:

Number of moles of neon = 2.7 mol

Number of atoms of neon = ?

Solution:

We will use using Avogadro number to solve given problem.

"It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance"

The number 6.022 × 10²³ is called Avogadro number.

1 mole of neon = 6.022 × 10²³ atoms of neon

2.7 mole of neon × 6.022 × 10²³ atoms of neon / 1 mole of neon

16.3 × 10²³ atoms of neon

Thus, 2.7 moles of neon contain 16.3 × 10²³ atoms of neon.

Directions: The diagram below shows Earth's orbit around the Sun. Use the diagram and
your knowledge of science to answer any questions that follow.
SL
SK
2
Expectation: 8.7(A)
At what position is it spring in the Northern Hemisphere?
Position
(6) Position K
© Position L
D Position M

Answers

Answer:

i think its k.

Explanation:

position k im sure

What element has 80 protons, 81 neutrons, 79 electrons?

Answers

Answer:

The element will be [tex]^{161}_{80}X[/tex]

Explanation:

Given that,

Number of proton = 80

Number of neutron = 81

Number of electron = 79

We know that,

The atomic number is equal to the number of proton.

So, the atomic number is 80.

According to atomic number,

The element will be mercury.

We need to calculate the atomic mass

Using formula of atomic mass

[tex]atomic\ mass=atomic\ number+number\ of\ neutron[/tex]

Put the value into the formula

[tex]atomic\ mass=80+81[/tex]

[tex]atomic\ mass=161[/tex]

We need to find the element

Using atomic mass and atomic number

[tex]atomic\ mass\ number A=161[/tex]

[tex]atomic\ number Z=80[/tex]

So, the element will be

[tex]^{A}_{Z}X[/tex]

Put the value of A and Z

Hence, The element will be [tex]^{161}_{80}X[/tex]

How much sunlight is there in the transition zone. For science.

Answers

Answer:

Transition zone of the sun

Explanation:

Transition Region - The transition region is a very narrow (60 miles / 100 km) layer between the chromosphere and the corona where the temperature rises abruptly from about 8000 to about 500,000 K (14,000 to 900,000 degrees F, 7700 to 500,000 degrees C).

According to the big bang theory, what was distributed in every direction as the universe expanded?

Answers

Answer: la masa porque a lo largo del tiempo se fueron creando planetas por todo el universo

Explanation:

May I have some salt? (What is salt consisted of?)

Answers

Answer: Salt is primarily composed of sodium chloride.

Explanation:

Explain the significance of this quote, “Heisenberg may have slept here.”

Answers

The quote; “Heisenberg may have slept here.” is used to show a situation that involves uncertainty.

What is the meaning of “Heisenberg may have slept here.”?

The quote; “Heisenberg may have slept here.” is used to connote uncertainty. Recall that Heisenberg the German scientist is the famous inventor of the uncertainty principle.

Hence, the quote; “Heisenberg may have slept here.” is used to show a situation that involves uncertainty.

Learn more about uncertainty principle:https://brainly.com/question/1851822

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How many electron domains does IF4+ have?

Answers

i maybe wrong but i believe 36

PLEASE HELP!!!!!
How much energy is needed to raise the temperature of 2.5 L of water from 20 C to 50 C? (anwer must be in Joules)

Answers

Answer:

8368 Joules

Explanation:

What challenges do scientists face in studying the Sun?

Answers

The challenges do scientists face in studying the sun is that due to high amount of heat, it is impossible to see sun.

What is sun?

Sun is a ball of hydrogen and helium gases which may produce large amount of heat as a result of nuclear fusion reaction.

High amount of heat is produced in the sun so it is not possible to see the sun from the normal eyes. Scientist uses telescope with mant filters to see a clear picture of the sun. Scientists are also not able to go near to the sun as produced heat is that much of power as they burn any object.

Hence above challenges are scientist face.

To know more about sun, visit the below link:

https://brainly.com/question/910950

5
Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
7
Calcule la masa de un líquido con una densidad de 2.5 g/mL y un volumen de 15 mL.
A. 375 g
B. 3.75 g
C. 37.5 g

Answers

Answer:

The answer is option C

Explanation:

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

mass = Density × volume

From the question

volume of liquid = 15 mL

density = 2.5 g/mL

We have

mass = 15 × 2.5

We have the final answer as

37.5 g

Hope this helps you

The isotope Np-238 has a half life of 2.0 days if 96 grams of it were present on Monday how much will remain six days later

Answers

Answer:

12.02 g

Explanation:

From the question given above, the following data were obtained:

Half life (t½) = 2 days

Original amount (N₀) = 96 g

Time (t) = 6 days

Amount remaining (N) =..?

Next, we shall determine the rate of disintegration of the isotope. This can be obtained as follow:

Half life (t½) = 2 days

Decay constant (K) =?

K = 0.693 / t½

K = 0.693 / 2

K = 0.3465 /day

Therefore, the rate of disintegration of the isotope is 0.3465 /day.

Finally, we shall determine the amount of the isotope remaining after 6 days as follow:

Original amount (N₀) = 96 g

Time (t) = 6 days

Decay constant (K) = 0.3465 /day.

Amount remaining (N) =.?

Log (N₀/N) = kt / 2.303

Log (96/N) = (0.3465 × 6) / 2.303

Log (96/N) = 2.079/2.303

Log (96/N) = 0.9027

Take the anti log of 0.9027

96/N = anti log (0.9027)

96/N = 7.99

Cross multiply

96 = N × 7.99

Divide both side by 7.99

N = 96 /7.99

N = 12.02 g

Therefore, the amount of the isotope remaining after 6 days is 12.02 g

Pleaseee help me on this

Answers

D I think you got it right. Hope this helps :)

Can regions that experience extreme low temperatures be located right
next to regions that experience very high temperatures?
Yes
No

Answers

Answer:No

Explanation:

Well yes but no, There cant be high tempreture that is 100 degrees and a low tempreture that is 20 degress, there has to be a mid inbetween both, they cant be next to eachother.

Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
O A. H2 + O2 + H2O
B. Mg + HCl + H2 + MgCl2
C. KC 103 → KC1 + O2
OD. H2O + CO2 + H2CO3

Answers

Answer:

Option D is correct.

H₂O + CO₂      →    H₂CO₃

Explanation:

First of all we will get to know what law of conservation of mass states.

According to this law, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

Example:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

Now we will apply this law to given chemical equations:

A) H₂ + O₂   →    H₂O

There are two hydrogen and two oxygen atoms present on left side while on right side only one oxygen and two hydrogen atoms are present so mass in not conserved. This equation not follow the law of conservation of mass.

B) Mg + HCl   →   H₂ + MgCl₂

In this equation one Mg, one H and one Cl atoms are present on left side while on right side two hydrogen, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.

C) KClO₃      →     KCl + O₂

There are one K, one Cl and three O atoms are present on left side of chemical equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.

D)  H₂O + CO₂      →    H₂CO₃

There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. Thus is correct option.

The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.

The conservation of mass states that the mass of the reactant and products has been equal. The mass can be calculated in terms of the number of atoms.

(A) [tex]\rm H_2\;+\;O_2\;\rightarrow\;H_2O[/tex]

The number of atoms of Hydrogen:

Reactant = 2

Product = 2

The number of atoms of Oxygen:

Reactant = 2

Product = 1

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(B) [tex]\rm Mg\;+\;HCl\;\rightarrow\;H_2\;+\;MgCl_2[/tex]

The number of atoms of Mg:

Reactant = 1

Product = 1

The number of atoms of H:

Reactant = 1

Product = 2

The number of atoms of Cl:

Reactant = 1

Product = 2

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(C) [tex]\rm KClO_3\;\rightarrow\;KCl\;+\;O_2[/tex]

The number of atoms of K:

Reactant = 1

Product = 1

The number of atoms of Cl:

Reactant = 1

Product = 1

The number of atoms of O:

Reactant = 3

Product = 2

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(D) [tex]\rm H_2O\;+\;CO_2\;\rightarrow\;H_2CO_3[/tex]

The number of atoms of H:

Reactant = 2

Product = 2

The number of atoms of O:

Reactant = 3

Product = 3

The number of atoms of C:

Reactant = 1

Product = 1

The number of atoms of products and reactant is equal, Thus, the reaction follows the conservation of mass.

The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.

For more information about the chemical reaction, refer to the link:

https://brainly.com/question/13383562?

What is the name of the ionic compound CaCN?

Answers

Answer:

Calcium cyanamide

Explanation:

I think it has to be calcium cyanide, because of the cyanamide ion (CN).

What is the correct electron-dot formula for Sulfur?

Answers

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

One tank of gold fish is fed the normal amount of food once a day. A second tank is fed twice a day. A third tank is fed four times a day during a six week study. The fish's weight is recorded daily. All tanks were of the same size and shape. IV: DV: Control Group:

Answers

The question is incomplete, the complete question is;

One tank of goldfish is feed the normal amount which is once a day, a second tank is fed twice a day, and a third tank is fed four times a day during a 6 week study. The fishes' body fat is recorded daily.

Independent Variable-

Dependent Variable-

Constants

Control Group-

Answer:

A) The amount of food the gold fish receives

B) Body fat of the gold fish

C) -Type of fish used in the study (gold fish)

Time period within which the fishes were fed (Six week period)

Shape and size of tank

D) group of gold fish fed the normal amount

Explanation:

The purpose of the study is to determined the impact of amount of feed on the body fat of gold fish. Hence, the amount of feed is the independent variable while the body fat of the feed is the dependent variable.

The control group receives the normal amount of feed (once a day). The fishes are all gold fish, fed within a six week period. All the tanks were of the same shape and size. These are the constants in the study.

wich represents a element

Answers

Copper - Cu is the answer

carbon monoxide: CO

water:H2O

salt:NaCl

copper: Cu

Please answer this, im too lazy to do the experiment.

1. What happened to the heavier materials in a mixture when left undisturbed?
2. How can we separate liquid and heavier particles in a mixture?
3. What materials are attracted by the magnet?​

Answers

Explanation:

(1) heavier materials sink to the bottom of the mixture

(2)use a filter funnel and filter paper (filtration method)

(3) ferromagnetic materials (typically metals)

sketch a heating curve for water at 101kPa
using the information from the phase diagram. Label the melting point and
boiling point temperatures on your heating curve

Answers

Answer:

Please find attached a sketch of the heating curve of water at atmospheric pressure ( approximately 101 kPa) as traced from an online source

Explanation:

Given that the pressure at 101 kPa is approximately 1 atmosphere, we have;

The melting point and the boiling point occurs at approximately 0°C and approximately 100°C, respectively;

The melting point and the boiling point experience latent heat, therefore that temperature remains the same, though heat is continuously added

Also, given that the latent heat of vaporization (22.6 × 10⁵ J/kg) is approximately 7 times the latent heat of fusion is (3.33 × 10⁵ J/kg), the length of the plateau representing evaporation would be approximately 7 times longer than the length representing fusion.

The heating curve obtained from an online source for water at atmospheric pressure, is presented in the attached sketch.

What is the density of an objects with a volume of 4.3 mL and a mass of 8.32g

Answers

Answer:

The answer is 1.93 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume}\\[/tex]

From the question

mass = 8.32 g

volume = 4.3 mL

So we have

[tex]density = \frac{8.32}{4.3} \\ = 1.934883720...[/tex]

We have the final answer as

1.93 g/mL

Hope this helps you

please help if u can ty..​

Answers

Answer:

a) [tex]BaF_{2}[/tex]

b) [tex]SnCl_{4}[/tex]

c) [tex]Cr_{2}O_{3}[/tex]

d) [tex]FeO[/tex]

e) [tex]Li_{3} P[/tex]

Explanation:

The charges of the ions have to be 0, so they balance.

a) [tex]Ba^{2+}[/tex] has the charge of +2 and [tex]F^{-}[/tex] has the charge of -1. So its [tex]0=(+2)+(-1)*2[/tex]. That means you need one [tex]Ba^{2+}[/tex] and two [tex]F^{-}[/tex] to balance the equation. -> [tex]BaF_{2}[/tex]

b) [tex]Sn^{4+}[/tex] has the charge of +4 and [tex]Cl^{-}[/tex] has the charge of -1. So its [tex]0=(+4)+(-1)*4[/tex]. That means you need one [tex]Sn^{4+}[/tex] and four [tex]Cl^{-}[/tex] to balance the equation. -> [tex]SnCl_{4}[/tex]

c) [tex]Cr^{3+}[/tex] has the charge of +3 and [tex]O^{2-}[/tex] has the charge of -2. So its [tex]0=(+3)*2+(-2)*3[/tex]. That means you need two [tex]Cr^{3+}[/tex] and three [tex]O^{2-}[/tex] to balance the equation. -> [tex]Cr_{2}O_{3}[/tex]

d) [tex]Fe^{2+}[/tex] has the charge of +2 and [tex]O^{2-}[/tex]has the charge of -2. So its [tex]0=(+2)+(-2)[/tex]. That means you need one [tex]Fe^{2+}[/tex] and one [tex]O^{2-}[/tex] to balance the equation. -> [tex]FeO[/tex]

e) [tex]Li^{+}[/tex] has the charge of +1 and [tex]P^{3-}[/tex]has the charge of -3. So its [tex]0=(+1)*3+(-3)[/tex]. That means you need three [tex]Li^{+}[/tex] and one [tex]P^{3-}[/tex] to balance the equation. -> [tex]Li_{3} P[/tex]

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