identify and calculate the number of representative particles in 2.15 moles of gold.

Answers

Answer 1

Answer:

[tex]1.29 * 10^{24}[/tex] particles of gold

Explanation:

To convert the number of moles of any substance, in this case gold, you need Avogadro's number.

Avogadro's number is always [tex]6.022[/tex] × [tex]10^{23}[/tex]

[tex]2.15[/tex] moles Au × [tex]\frac{6.022*10^{23} particles}{1 mole Au}[/tex] = [tex]1.29 * 10^{24}[/tex] particles of gold

Answer 2

The number of representative particles in 2.15 moles of gold is 1.29 × 10 ²⁴.

What is mole ?

The term mole is defined as the amount of  substance containing 6.023 × 10²³ particles. 1 mol = 6.023 × 10²³ particles. This number is also called Avogadro's number. The symbol of mole is denoted by M.

A mole is a very important unit of measurement that chemists use. By using moles, chemists have to measure for very small things like atoms, molecules, or other particles.

The quantity amount of substance is a measure of how many elementary entities of a given substance are present in it.

To convert the number of moles of any substance, we required Avogadro's number.

Avogadro's number is always equal to 6.023 × 10 ²³

2.15 moles Au × 6.023 × 10 ²³ particles / 1 mole of Au

= 1.29 × 10 ²⁴ particles of gold

Thus, the number of representative particles in 2.15 moles of gold is 1.29 × 10 ²⁴.

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Related Questions

U
Question 2
1 pts
mixture that is evenly spread throughout; also known as a homogeneous mixture.
O gas
O solid
O solution
O chemical property
Question 3
1 pts
state of matter with definite shape and volume.

Answers

Answer:

2. Solution       3.Solid

Explanation:

What is the problem with mental models?

Answers

Mental models also guide your perception and behavior. They are the thinking tools that you use to understand life, make decisions, and solve problems. Learning a new mental model gives you a new way to see the world—like Richard Feynman learning a new math technique. Mental models are imperfect, but useful.

hope this helped :)

A teacher is preparing the materials list for an activity that all 6th graders will
complete. Each student will create a scale model of the planets in Earth's solar
system. A student will need 2,250 mg of clay to create a model of Mercury.
What two conversion factors will the teacher need to use in determining how
many kilograms of clay to order?

Answers

Answer:

There are 1000 mg in 1. g

There are 1000 g in 1 kg

Each students needs 2,250 mg of clay

Explanation:

In order to determine the amount of how many kilograms to order, the teacher will need to find out the total mass of clay required by the students and then the teacher will have to convert the total mass to the units required for the purchase.

The teacher would have to find out how many milligrams make one kilogram as follows

1 kg = 1000 g

1 g = 1000 mg

Therefore, 2,250 mg = 2250/1000 g = 2.25 g

2.25 g = 2.25/1000 kg = 0.00225 kg.

The building has 25 stories.
Qualitative or Quantitative?

Answers

Answer:

Quantitative

Explanation:

Quantitative statements involve numbers. (Ex: The house has 4 bedrooms.)Qualitative statements describe characteristics. (Ex: The house is blue.)

Suppose you know the number of protons in an atom. What other information would you need in order to determine the mass of the atom? Explain your reasoning. Help Plz

Answers

Answer:

Number of neutrons

Explanation:

The mass of an atom is roughly the sum of the number of protons and neutrons it has. If you have the number of protons, all you would need is the number of neutrons to determine the mass.

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Different organisms have different "habitats." These are all examples of habitats: The tops of banana trees in a rainforest The moist area inside a log on a forest floor The sand on the bottom of a shallow area of the ocean Which survival need best defines "habitat"? oxygen or carbon dioxide someplace to live food water

Answers

Answer:

Oxygen/Carbon dioxide

Explanation:

The basic description of living things are organisms which have a cell system to produce energy with either primarily via respiratory exchange abilities, by the existence .

The primal survival need for a possessing a habitat would have to be oxygen/carbon dioxide present,

I hope this was helpful.

Answer:

Habitat

Explanation:

Thats what its called when an animal has a home there habitat

Put 4.789 x 10^9 into standard notation.

Answers

Answer:

4789000000

Explanation:

When we multiply anything by 10, we follow the base 10 system rules.

All we simply have to do is move the decimal place 9 places to the right.

4.789 x 10⁹ = 4789000000

Answer:

4,789,000,000

Explanation:

4.789 × 10⁹

using 10⁹ = 1

-----

10⁹

4.789. 4.789

---------- = ---------------------

10⁹ 1,000,000,000

4.789 × 10⁹ = 4, 789, 000, 000

Which of these statements contains an inference? Question 10 options: After three substances were mixed with a blue liquid, the well plate got warmer. No chemical reaction occured in well #5. Upon mixing, the liquids had a milky appearance. The substance was heated and a clear liquid formed.

Answers

Answer:

None

Explanation:

In reporting experimental procedures/analyses, the inference is made after multiple observations have been summed up, to find the nearest possible outcome that explains the phenomenon.

If all options are listed in the question, nothing was inferred after the procedure and observation.

An example of inference would be "CO23- present" or "Chloride formation"

I hope this explanation is clear.

Convert 0.95 kilograms into centigrams. (1 g = 100 cg; 1 kg = 1000 g)

Answers

Answer:

95,000 centigrams

Explanation:

There is 1000 CG in 0.01 kilograms

so you do 1000*95 which equals 95,000 centigrams.

Which of the following is an example of a crystalline solid?
O A. Rubber
O B. Plastic
C. Diamond
O D. Glass

Answers

C diamond for sure solid

Negative and positive ions alternate in the ionic crystals. For instance, the melting point of calcium fluoride (CaF[tex]_2[/tex]) is 1418 °C. Therefore, the correct option is option C.

What is Crystalline Solid?

The description of crystalline solid states that it is a substance whose atoms or even subatomic particles are organized in a highly structured form.  Atomic nuclei in metallic crystals are surrounded by a "sea" of delocalized electrons.

Molecules of many types make up molecular crystals. Atoms that are covalently bound to one another make up covalent network crystals. Jewelry is crafted with diamond. Quartz is used to create things like watches and wall clocks. Among all the given options diamond is the only compound which is Crystalline Solid.

Therefore, the correct option is option C.

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Write each number in standard notation.
0.9x 10-1

Answers

The answer is 0.09.

John Fang has 5 apples, Jonny ate 3, how many are left!

Answers

Answer:5-3=2

As 5apple eaten 3apple so left 2apple

How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C?
a) 0.00027
b) 3
c) 90
d) 13,000

Answers

Answer:

c) 90

Explanation:

Answer:

C

Explanation:

The amount of heat required to increase temperature by  Δ T of an object with mass  m  and specific heat  s  is given by  Q = m s Δ T . For copper specific heat  s = 0.09   c a l / go C

Where is the most energy transferred in a food web?
a
From decomposer to secondary consumer

b
From producer to primary consumer

c
From primary consumer to secondary consumer

d
From secondary consumer to primary consumer

Answers

Explanation:

from producer to primary consumer is the correct answer of this question

Answer:

The answer is B.

Explanation:

"From producer to primary consumer"

Have a nice day, and keep dreaming <3

wafting the air above a chemical is one way to it directly

Answers

To smell it directly

Solving for TIME: You need to get to class, 200 meters away, and you can only
walk in the hallways at about 2 m/s. (if you run any faster, you'll be caught for
running). How much time will it take to get to your class?

Answers

Answer:

1.66 mins

Explanation:

Distance = 200 m

Speed = 2 m/s

Time taken = [tex]\frac{Distance}{Speed} = \frac{200}{2} = 100[/tex] secs = 1.66 mins

The chemical formula for glucose is C6H1206. How many different elements make up one
molecule of glucose?

Answers

Answer:

3 different elements make up Glucose

Explanation:

C = Carbon ( *6 )

H = Hydrogen ( *12 )

O = Oxygen ( *6 )

5.25 calories are absorbed by an iron nail. How many joules is this?
a) 1.07
b) 9.43
c) 12.6
d) 21.9
* I NEED EXPLANATION!!! *

Answers

Answer:

D) 21.9

Explanation:

1 kilocalorie is equal to 4184 joules

0.001 kilocalorie is equal to 1 calorie

so 5.25 calorie=21.966 joules

What is 0.0000000652 in scientific notation?

Answers

Answer:

it denotes 6.52× 10⁸ in scientific notation

The answer is 6.56x10^8

what are factories tell answer ​

Answers

Answer:

a building or group of buildings where goods are manufactured or assembled chiefly by machine.

Answer:

Factorise is a way of writing an expression as a product of its factors using brackets.

Explanation:

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If the mass of an object stays the same but its volume decreases, will the density increase or decrease?

Answers

Answer:

Increase

Explanation:

Density = Mass ÷ Volume

Let the mass be 100 for instance and the original volume to be 4.

100 ÷ 4 = 25

The new volume let it be 2.

100 ÷ 2 = 50

50 is more than 25 so the density increases

what type of matter can be physically separated

Answers

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule

Answer:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

Hope this help's :)

A metal cube has a mass of 20 g and a volume of 5 ml. What is the density? Is the cube made of pure aluminum? Explain your answer in the "other" area. * A.2.7 g/mL B.4 g/mL C.100 g/ml D.Yes it is aluminum E.No it is not aluminum Other:__________________________________________________________

Answers

Explanation:

Given that,

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

We need to find the density of the cube. Mass per unit volume equals density.

[tex]d=\dfrac{m}{V}\\\\d=\dfrac{20\ g}{5\ mL}\\\\d=4\ g/mL[/tex]

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 4 g/mL.

So, the cube is not Aluminium cube.

The density of Aluminium is 2.7 g/mL.  The cube is not the Aluminium cube.So, option B and E is correct

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

The formula for density is as follows:-

[tex]Density=\frac{Mass}{Volume} \\\\[/tex]......(1)

Substitute 20 g for mass, and 5 ml for volume in the above equation as follows:-

[tex]Density=\frac{20\ g}{5\ mL} \\\\=4\ g/mL[/tex]

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 2.7 g/mL.  So, the cube is not the Aluminium cube. So option B and E are correct.

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Pls answer I am confused PLEASE HELP

Answers

Answer:

Glucose is the carbohydrate produced by photosynthesis. Energy-rich glucose is delivered through your blood to each of your cells. ATP is the usable form of energy for your cells.

Explanation:

Before Chemical Reaction
Mass of Vinegar (g)
Mass of Antacid Tablet (g)
75.83
1264
After Chemical Reaction
Mass of Chemical Reaction (kg)
0.08547
1. Explain how this chemical reaction represents the law of conservation of matter.

Answers

Answer:

This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.

The expression “like a ton of bricks” means “very hard.” Would being hit by an actual ton of bricks hurt if it happened on the moon? A. Yes, it would hurt because the bricks would still have the same weight B. No, it would not hurt as much because the bricks would have less weight C. Yes, it would hurt because the bricks would still have the same mass D. No, it would not hurt as much because the bricks would have less mass.

Answers

Answer:

The correct option is;

C. Yes, it would hurt because the bricks would still have the same mass

Explanation:

Given that the expression "like a ton of brick" refers to the tendency of an object being crushed by another object, which is due to the impact of the force, and from Newton's law a force is proportional to the rate of change of momentum produced, therefor if the brick of the same mass is given the same velocity as it had on the Earth while the person remains stationary, it will hurt if the brick hits the person.

How do Atoms become Ions? Answer in 3 to 4sentences

Answers

An atom is when the protons and electrons are equal protons have a positive charge and electrons have a negative charge so when they are equal they cancel each other out meaning they have no charge or they are an atom. An ion happens when the protons and electrons aren’t equal, it’s no longer an atom. When you have more protons then electrons you have a positive charged ion. When you have more electrons then protons you have a negative charged ion.

3. In all cells, genetic materials are stored in the
A. Cell wall
B. Ribosomes
C. Nucleus
D. Lysosomes

Answers

Nucleus c
Because it is the powerhouse of the cell

Periodic Table: Which families are highly reactive? Which family is unreactive?

Answers

The families that have the highest reactivities are the a lkali metals and earth alkali metals . These are located far left on the periodic table. They are highly reactive because they have an shell with only 1 electron and need to complete the shell to become stable. The family that is unreactive is inert elements or noble gases.

The alkali metals (lithium family) are highly reactive while the noble gases (helium family) are highly unreactive.

What are alkali metals?

The alkali metals are the elements of group 1 in the modern periodic table which are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

All alkali metal has their outermost electron in the s-orbital with the outer configuration ns¹. The alkali metals easily lose the outermost electrons to form cations with charge + 1. Therefore they are highly reactive and are stored under oil to stop the reaction with air.

The noble gases have completely filled electronic configurations. The noble gases have a general outer configuration ns²np⁶ so they have completely filled valence shell therefore, they do not feel any attraction for other atoms. Therefore, noble gases exist in monoatomic form. Therefore, noble gases are highly unreactive and also known as inert gases.

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a fruit salad bowl is classified as which of the following​

Answers

Answer:

its a heterogeneous mixture.

Explanation:

The heterogeneous mixture has a non-uniform composition and has two or more phases. It can be separated out physically.

A homogeneous mixture is a solid, liquid or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components in which proportions vary throughout the sample.

Examples of Heterogeneous Mixtures

Sugar and sand form a heterogeneous mixture. If you look closely, you can identify tiny sugar crystals and particles of sand. Ice cubes in cola form a heterogeneous mixture. The ice and soda are in two distinct phases of matter (solid and liquid).

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