How many moles are in a sample of 9.47 x 1024 atoms of argon (Ar)? (Show your calculations for full credit. Correct answers will only receive partial credit.)

Your answer:

Answers

Answer 1

Answer:

15.73 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{9.47 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 15.730897...[/tex]

We have the final answer as

15.73 moles

Hope this helps you

Answer 2

Answer:

15.7 moles of Ar

Explanation:

Given data:

Number of atoms = 9.47 ×10²⁴ atoms

Number of moles of Ar = ?

Solution:

The given problem will solve by using Avogadro number.

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 = 6.022 × 10²³ atoms

9.47 ×10²⁴ atoms × 1 mole / 6.022 × 10²³ atoms

1.57×10¹ mol

15.7 mol


Related Questions

Which is the formula for iodine tribromide?
IBr
IB3
IBr3
I3Br

Answers

Answer:

the answer is c IBr3

Explanation:

The chemical formula for iodine tribromide is IBr₃ as it has 1 iodine and 3 bromine atoms.

What is chemical formula?

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Which statement about plant and animal cells is true? A. Plant cells have a nucleus and a cell wall; animal cells do not have either of these structures. B. Plant cells have a cell wall and chloroplasts; animal cells do not have either of these structures. C. Plant cells have a cell wall and a cell membrane; animal cells have a cell wall but not a cell membrane. D. Plant cells have chloroplasts and mitochondria; animal cells have chloroplasts but do not have mitochondria.

Answers

Answer:

B. Plant cells have a cell wall and chloroplasts; animal cells do not have either of these structures.

Explanation:

A major difference between a plant cell and an animal cell is presence of chloroplasts in plant cells. Another key difference between plant and animal cells is the presence of a cell wall in plant cells. Both structures are absent in an animal cells.

The cell wall surrounds the plasma membrane of plant cells. This helps to provide the required tensile strength and protection against mechanical and osmotic stress.

Cell walls also help plants to maintain shape and rigidity.

The plant cell has a cell wall and chloroplast, while the animal cell lacks both of them. Thus, option B is correct.

The cell has been the smallest unit of life that has been performing varying functions with the help of different organelles.

The plant cell has been exposed to harsh environmental conditions, thus has been consisting of the cell wall along with the cell membrane. However, animal cell lacks a cell wall.

The food has been processed in the plant cells with the help of photosynthesis that required chlorophyll. The chlorophyll has been consisted in the chloroplast. Thus plants cell have consisted of chloroplast, however, animal cells lack chlorophyll as well as chloroplasts.

Thus, the plant cell has a cell wall and chloroplast, while the animal cell lacks both of them. Thus, option B is correct.

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Señalar la opción correcta El primer alcalino y el primer gas noble tienen la misma cantidad de niveles ocupados El primer alcalinotérreo tiene 2 e en su CEE El cuarto halógeno tiene 5 electrones de valencia

Answers

Answer:

El primer gas alcalino y el primer gas noble tienen el mismo número de niveles ocupados. Cierto.

La primera tierra alcalina tiene 2 e en su CEE. Cierto.

El cuarto halógeno tiene 5 electrones de valencia. Falso.

Explicación:

El primer alcalino y el primer gas noble tienen el mismo número de niveles ocupados porque el primer alcalino tiene 1 electrón y solo tiene una capa, mientras que el gas noble tiene 2 electrones y también tiene una capa. El primer alcalinotérreo tiene 2 e en su CEE debido a la presencia en el segundo grupo en la tabla periódica. El cuarto halógeno no tiene 5 electrones de valencia en su capa más externa, tiene 7 electrones en su capa más externa debido a la presencia en el grupo de siete de la tabla periódica.

in which of the following is the symbol for the ion and the number of electrons it contains given correctly? *

Answers

Answer:Number of electrons that are present in an atom is determined by the electronic configuration of that atom.

If an ion is carrying a positive charge, it means that the atom has lost electrons and if an ion is carrying a negative charge, it means that the atom has gained electrons.

For the given options:

Option A: The atomic number of hydrogen atom is 1 and the electronic configuration for  ion will be:  

Thus, this atom does not have any electrons.

Option B: The atomic number of bromine atom is 35 and the electronic configuration for  ion will be:  

Thus, this atom has 36 electrons.

Option C: The atomic number of aluminium atom is 13 and the electronic configuration for  ion will be:

Explanation:

Most of the elements on the Periodic Table are metals.
True
False

Answers

Answer:

the answer is true

Explanation:

I hope so it is helpful to u

The mixture of sodium bicarbonate (a base) with nitric acid (an acid) produces a salt and water. This type of reaction is known as which of the following?

A: oxidation-reduction
B: neutralization
C: single replacement
D: synthesis

Answers

Neutralization I think

i need so much help 50 points!!!!!! complete the graph

Answers

Where is the graph at? may you send a picture of it?

Question 1
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:



6 L + 3 S + 5 W = 12 LA



You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).
How many cups of lemonade can you make?

Question 1 options:

9 Cups of Lemonade


12 Cups of Lemonade


18 Cups of Lemonade


32 Cups of Lemonade

Question 2
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:



6 L + 3 S + 5 W = 12 LA



You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).



Which ingredient limits (runs out first) the amount of lemonade you can make?

Question 2 options:

Lemon Juice


Sugar


Water


Lemonade

Question 3
You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of Lemonade (LA): your formula is:



6 L + 3 S + 5 W = 12 LA



You are given 9 cups of lemon juice (L), 8 cups of sugar (S) and unlimited water (W).



How much of the other ingredient do you have in excess (more then you need)? (don’t include water since you have an unlimited amount)

Question 3 options:

4.5 cups of Sugar


3.5 cups of Sugar


3.5 cups of lemon juice


4.5 cups of lemon juice

Answers

Answer:

1.) 12 tablespoons of sugar and 3 cups of water (48 tablespoons)

2.) Amount of lemon juice, sugar and water required will be = 0.375 cups, 0.75 cups and 3 cups.

Step-by-step explanation:

Malanie is making lemonade and finds a recipe that requires lemon juice, sugar and water in the ratio of 1 : 2 : 8.

She juices 2 lemons to obtain 6 tablespoons of lemon juice.

∵ 16 tablespoons = 1 cup

∴ 1 tablespoon =  cup

∴ 6 tablespoon =   cup =  0.375 cups

Since ratio between lemon and sugar is 1 : 2

So amount of sugar required = 0.375×2 = 0.75 cups

Ratio between lemon and water is 1 : 8

So amount of water required = 0.375×8 = 3 cups

Therefore, amount of lemon juice, sugar and water required = 0.375 cups, 0.75 cups sugar and 3 cups respectively.

Explanation:

Answer:

18 cups.

Lemon Juice

I put 4.5 cups of sugar

I got 4/5 on this quiz and I don't remember which was wrong but there you go...

How many moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas?

Balanced equation: 2H2 + O2 → 2H2O (5 points)


a. 2 moles of water
b. 4 moles of water
c. 5 moles of water
d. 7 moles of water

Answers

Answer:

It is b

Explanation: I did it on the test and got it right

The moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas - b. 4 moles of water

The stoichiometric coefficients can be considered in a balanced equation as moles of reactants needed or moles of products formed in the reaction.  

In the given case, the balanced chemical equation for this synthesis reaction looks like this

2H2 + O2 → 2H2O  

from the balanced equation, it is clear that the 2  moles of hydrogen gas and 1  mole of oxygen gas are required to produce  2  moles of water.  so it means that the reaction produces twice as many moles of water as you have moles of oxygen gas that take part in the reaction and the same moles as hydrogen atoms present.Here it is given that there are only 2 moles of oxygen which means it is in deficiency however, it will produce 4 moles of water with four moles of hydrogen.

Thus, the moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas - b. 4 moles of water

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Please answer these. The tables needed for question 7 are in the picture. I got rid of some of the questions that you wouldn’t be able to answer without doing the lesson

Question 1: Electron Notation Example (2 points)

a. Give the electron configuration of vanadium (V), atomic number 23. (0.5 points)

b. Give the noble gas configuration of vanadium (V), atomic number 23. (0.5 points)

c. List the energy levels for the orbital configuration of vanadium (V), atomic number 23. (1 point)

Question 3: Trends on the Periodic Table (2 points)
a. How does the atomic radius change going down and across the periodic table? (0.5 points)

b. How does first ionization energy change going down and across the periodic table? (0.5 points)

c. How does electronegativity change going down and across the periodic table? (0.5 points)

d. How does the radius of a positive and negative ion compare to a neutral atom? (0.5 points)

Question 4: Chemical Bonds (1 point)
Match each chemical bond to its correct description. (1 point)
A. Ionic bond ___ Sharing of electrons
B. Covalent bond ___ Freely moving electrons
C. Metallic bond ___ Transfer of electrons
Question 5: Intermolecular Forces (3 points)

a. Describe the dipole-dipole force. (1 point)

b. Describe hydrogen bonding. (1 point)

c. Describe the Van der Waals forces. (1 point)

Question 6: Intermolecular Forces and You (2 points)
Imagine you need to take a medicine that the doctor has prescribed for you. Explain why scientists who developed that medicine would need to know whether or not the compound in that medicine is polar. How might a polar medicine behave differently within your body than a nonpolar medicine would? Answer in 1 to 2 paragraphs.

Question 7: Energy in Bonds (9 points)
Use these tables for reference for all parts of this question.

This table summarizes the average energies of single bonds between atom pairs in many different compounds.
a. According to Table 2, which is the strongest bond? Which is the weakest bond? Based on what you know about the atomic radii and electronegativity of the elements involved in the bonds, why do you think these two have the most extreme bond-energy values? (3 points)

b. How are the bond energies of each bond listed in Table 2 determined? (1 point)

c. Why do you think there aren't bond energy values given in Table 2 for N–S and S–I? (1 point)

d. Based on Tables 1 and 2, how would you describe the trend in bond strength of single, double, and triple bonds? (1 point)

e. Based on Table 2, how would you describe the trend in the strength of bonds formed by the elements carbon, nitrogen, and oxygen? Would you describe this trend as a periodic trend? Why or why not? (3 points)

Question 8: Causes of Molecular Shape (3 points)
a. What is the VSEPR theory? (1 point)

b. How does electron repulsion determine molecular shape? (1 point)

c. How do lone electron pairs affect molecular shape? (1 point)

Question 10: Lewis Structure (3 points)
a. Draw the Lewis structure for the Se and 2 H atoms. (1 point)

b. Draw the Lewis structure for the SeH2 molecule. (1 point)

c. What shape would SeH2 have? Draw the molecule. (1 point)

Question 11: Ionic and Covalent Compounds (5 points)
Identify each of the following as a covalent compound or ionic compound. Then provide either the formula for compounds identified by name or the name for those identified by formula. (1 point each)
a. Li2O:

b. Dinitrogen trioxide:

c. PCl3:

d. Manganese(III) oxide:

e. Calcium bromide:

Answers

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

What is element?

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of vanadium is 23. The electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³. The noble gas electronic configuration of vanadium is  [Ar]3d³4s². 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.

Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

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What is the affected variable in an experiment. A:independent. B:dependent. C:control

Answers

In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.

IamSugarBee

Bats have oversized ears, which help the bats use sound waves to detect the motion of their prey. Which example of the characteristics of life is most similar?

Answers

Answer:

option B = A rat hides in its hole when it sees an approaching predator.

Explanation:

In order for any organisms, whether plants or animals to be able to keep being alive they have to develop a/some functions or abilities which is going to aid in their battle battle for survival, this concept is known as the Adaptive features of organisms.

From the question above, it can be seen that the oversized ears in bats is an adaptive features for them to get their food: as it helps them to use sound waves to detect the motion of their prey.

Unlike the bats, the rats adaptive features is to have a good running legs. This will help them to avoid getting eating by predators.

Answer:just saying he is correct

Explanation:

A wheelbarrow has wooden handles that are 3.5 feet long. The axle on the wheel is the
fulcrum and is 0.5 feet from the end. What is the MA? You know you can probably lift 70
pounds without too much effort. How heavy of a wheelbarrow load can you lift?

Please answer

Answers

14 to the fifth power

How many total electrons does Fluorine have?

Answers

Answer:

nine electrons

Explanation:

Answer:

There are 9 total electrons. There is always the same number of protons and neutrons so the charge in the atom balances out. The atomic number is the number of protons, and electrons.

Explanation:

0.190 moles cesium chloride converted to grams

Answers

Answer:

31.9881055

Explanation:

0.190*168.35=31.9881055

For the compound butane (C4H10)

a) What are the elements in the compound?

b) What are the number of atoms of each element?

c) What are the total number of atoms per molecule?

Answers

I think b not sure though
A. Carbon and Hydrogen.
B. Carbon: 6 Hydrogen: 1
C. 34

1. Which of the following substances is believed to be responsible for the hole in the ozone
layer?
A. Ammonia
B. Chlorofluorocarbons (CFCs)
C. Lead
D. Carbon monoxide

Answers

A. Ammonia because look it up

What is the density of butane (C4H10) at STP?

Help please

Answers

Answer:

his means 1 mole of butane has a volume of 22.4dm3 at STP. 1 mole of butane has the same mass in grams as its relative molecular mass.

Exactly What they said ^

What part of the atom tells you what element it is?
Number of electrons
Number of Photons (the light particle)
Number of Neutrons
Number of Protons

Answers

Answer: I believe it is the number of protons.

DO ANY OF YALL KNOW THIS?????

1. Why do we need to use the mole to count atoms? (2pts) 

 
2. What is the Molar mass of the following? Show your work
  a. H2O2  (4pts) 
   b. C2H6  (4pts) 

Answers

Answer:

1.mole allows us to weigh convenient amounts of material containing known numbers of atoms; i.e., it allows us to count atoms

2. H202 :34.0147 g/mol

C2H6: 30.07 g/mol

5. The compound is called:
*
(1 Point)
VP2
Vanadium (1) phosphide
Vanadium (IV) phosphide
Vanadium phosphide
Vanadium (VI) phosphide
Vanadium (V) phosphide
6. The compound is called

Answers

Answer:

Vanadium (VI) Phosphide

Explanation:

Vanadium has a 6+ charge for this compound, so there needs to be two phosphorus atoms to satisfy the charges. This is an ionic compound as well so the roman numerals need to be present.

Find the percent of water in Zn3(PO4)2 x 7H2O

Answers

Answer:

24.66%

Explanation:

To find the percent of water (H2O) in the following compound: Zn3(PO4)2. 7H2O

The atomic mass of the elements are as follows:

Zn = 65g/mol

P = 31g/mol

O = 16g/mol

H = 1g/mol

Hence, molar mass of the compound is as follows:

65(3) + {31 + 16(4)} 2 + 7{1(2) + 16}

195 + 95(2) + 7(18)

195 + 190 + 126

511g/mol

Molar mass of 7H2O

= 7(18)

= 126g/mol

Hence, the percent of H2O in the compound is:

Molar Mass of 7H2O/molar mass of compound × 100

= 126/511 × 100

= 0.2466 × 100

= 24.66%

How much work is required to pull a sled if you use 60J of work in 5 seconds?

Answers

Answer:

DO I Look Like santa too you how am i supposed to know How about this how about you goo.gle the answer wow smart

Explanation:

. Classify each of the organisms in Figures 2 and 3 as
herbivore, carnivore, or omnivore. Explain your
classifications.
HELLLPPPP MEEEE PLEASE

Answers

Answer:

Herbivore, Omnivore & Carnivore

Explanation:

Herbivore they eat grass, Omnivores eat fruits and vegetables & Carnivores eat meat or flesh so that's why herb then omni and last carni bc so omni and herbi eat like the same thing

Answer:

Herbivore, Omnivore & Carnivore

Explanation:

A mixture contains 21.7 g NaCI, 3.74 g KCI, and 9.76 g Lici. What is the mole fraction of NaCl in this mixture?

Molar mass
NaCl: 58.44g/mol
KCl: 74.55g/mol
LiCl: 42.39g/mol​

Answers

Answer:Mole Fraction of NaCl=0.5697

Explanation:

No OF Moles of NaCl=  Mass / Molar mass

=21.7 g/58.44g/mol

=0.371moles

No OF Moles of KCl=  Mass / Molar mass

=3.74g/74.55g/mol

=0.0502moles

No OF Moles of LiCl=  Mass / Molar mass

=9.76 g/42.39g/mol

=0.230moles

Mole Fraction of NaCL = Moles of NaCL/ Total number of moles of the mixture

=0.371/( 0.371+ 0.0502+0.230)

0.371/0.6512

=0.5697

Answer:

Mole fraction: 0.570

Explanation:

Mole fraction is defined as the ratio of moles of a compound in a mixture over the total moles of the mixture. To solve this problem, we need to find moles of the 3 salts:

Moles NaCl -Molar mass: 58.44g/mol-:

21.7g NaCl * (1mol / 58.44g) = 0.3713 moles

Moles KCl -Molar mass: 74.55g/mol-:

3.74g KCl * (1mol / 74.55g) = 0.0502 moles

Moles LiCl -Molar mass: 42.394g/mol-:

9.76g LiCl * (1mol / 42.394g) = 0.2302 moles

Mole fraction NaCl:

0.3713mol / (0.3713mol + 0.0502mol + 0.2302mol) =

0.570

Which of the following is NOT a physical property?

A. melting point
B. state of matter
C. density
D. flammability

Answers

Answer:

i think.its D ddddddddddddd

What is the condensation point and freezing point of neon in KELVIN.

Answers

Answer:

-415.5°F (-248.6°C)

Explanation:

Answer: The melting point/condensation point of neon is 24.53888889. Of course, I'm sure you can round that. The freezing point would be 521.74. All of this is in Kelvin

A 0.040 kg ball tied to a string moves in a circle that has a radius of 0.700 m. If the ball is accelerating at 43.2 m/s2, what is the tangential velocity of the ball?

Answers

Answer: 30.24 m/s

Explanation:

Got it right on test

Does anyone know how to determine if a reaction is a redox or not?
2Ca+O2→2CaO2 is the reaction. I've already made it a balanced equation, I just need to determine if its a redox or not.
Thank you!

Answers

The reaction is included in a redox reaction

Further explanation:

Given

Reaction

2 Ca + O₂ → 2 CaO

Required

a redox reaction

Solution

Redox reactions are reactions where there is a change in oxidation number

Oxidation is an increase/increase in oxidation number, while reduction is a decrease/decrease in oxidation number.

Reducing agents are substances that experience oxidation  and oxidizing agent are substances that experience reduction

in the above reaction is included in a redox reaction because there is a change in oxidation number

Ca⇒Ca²⁺+ 2e⁻(for balanced equation : 2Ca⇒2Ca²⁺+4e⁻)

Oxidation ( 0 to +2)

O₂+2e⁻⇒O²⁻(for balanced equation : O₂+4e⁻⇒2O²⁻)

Reduction (0 to -2)

A nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?

A. 1
B. 3
C. 4
D. 6

Answers

Answer:

3 electrons

Explanation:

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(in cm)Question 1 options:3.2 cm4.8 cm5.76 cm8 cm All US presidents ______________.Group of answer choices:serve as Commander-in-Chief of the armed forcessend troops into battlenominate Supreme Court Justicesdeclare war What is the greatest common factor (GCF) of 54 and 45? A. 9 B. 270 C. 6 Please answer these a best as possible!!!!!!Easy Riddles1. Riddle: What has to be broken before you can use it?2. Riddle: Im tall when Im young, and Im short when Im old. What am I?3. Riddle: What month of the year has 28 days?4. Riddle: What is full of holes but still holds water?5. Riddle: What question can you never answer yes to?6. Riddle: What is always in front of you but cant be seen?7. Riddle: Theres a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs?8. Riddle. What can you break, even if you never pick it up or touch it?9. Riddle: What goes up but never comes down?10. Riddle: A man who was outside in the rain without an umbrella or hat didnt get a single hair on his head wet. Why?11. Riddle: What gets wet while drying?12. Riddle: What can you keep after giving to someone?13. Riddle: I shave every day, but my beard stays the same. What am I?14. Riddle: You see a boat filled with people, yet there isnt a single person on board. How is that possible?15. Riddle: You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?16. Riddle: A man dies of old age on his 25 birthday. How is this possible?17. Riddle: I have branches, but no fruit, trunk or leaves. What am I?18. Riddle: What cant talk but will reply when spoken to?19. Riddle: The more of this there is, the less you see. What is it?Riddles for Kids20. Riddle: Davids parents have three sons: Snap, Crackle, and whats the name of the third son? What is the slope of the line that passes through the points (-4,0) and (-4, -10)?Write your answer in simplest form. HELP PLLZZZZZZZZZZZZZZ MARKING BRAINLIEST IF YOU DONT KNOW DONT ANSWERUsing complete sentences post a detailed response to the following.Although technology was not specifically mentioned in the unit, there is no denying it has become such a huge part of our lives including our fitness. What are some ways that increased technology use has negatively impacted personal fitness? What are some ways that it has helped personal fitness? Explain.Explain your answer- 2-4 sentences- include a negative example and explain- include a positive example and explain- answer using complete sentences