Chemistry High School

Calculate the number of moles of neon gas in 8.15 atoms of neon gas

Calculate The Number Of Moles Of Neon Gas In 8.15 Atoms Of Neon Gas

Answers

Answer 1

Answer:

13.5 moles Ne

Explanation:

Atoms --> Moles

1. Put the given number over 1

2. Multiply by 6.022x10^23 to get to moles

3. Round by sigfigs

(8.15x10^24 atom Ne(g)/1) (1 atom Ne(g)/6.022x10^23molesNe)=13.5337...

13.5337 --> 13.5 moles Ne

Related Questions

how should i read chemistry ? ​

Answers

Answer:

CHEMIcal hiSToRY

Explanation:

What is methane? Where is it found?

Answers

Answer:

Methane is an odorless, colorless, flammable gas. It is used primarily as fuel to make heat and light. It is also used to manufacture organic chemicals. Methane can be formed by the decay of natural materials and is common in landfills, marshes, septic systems and sewers

Explanation:

How many moles of Magnesium are present in 0.478 g of the element?
(Atomic mass: Mg-24 u)

Answers

Answer:

0.0199moles

Explanation:

The number of miles of a substance can be calculated using the formula:

Number of moles (n) = Mass (M) / Molar mass (MM)

In this question, the mass of Magnesium element (Mg) = 0.478 g while the atomic mass is 24

Therefore, number of moles of Magnesium is:

Moles = 0.478/24

Moles = 0.01992

Hence, 0.0199 moles of Magnesium are contained in 0.478 g of the element.

6. The concentration of a solution is : a)The amount of solvent needed to fully dissolve a solute b)The measurement of how large a mixture can get before it becomes a solution c)The measurement of how much solute can be dissolved in a liter of solvent d)The proportion of solute to solvent in a mixture

Answers

Answer:

Option c) The measurement of how much solute can be dissolved in a liter of solvent.

Explanation:

The concentration of a solution can be defined as the amount of solute in 1 litre of the solvent i.e how much of the solute that can dissolve in a litre of the solvent. Mathematically, it can be written as:

Concentration = mole of solute / Volume of solvent

Thus, the unit for the concentration is mole per litre (mol/L)

From the above illustration, we thus say that the concentration of a solution is a measure of how much solute can be dissolved in a liter of solvent.

Answer: A) Increase the amount of solute.

              C) Decrease the amount of solvent.

What is the correct order for.the three steps of the scientific method ?

Answers

The basic 3 steps are: 1) make an observation that describes a problem 2) create a/an hypothesis 3) test the hypothesis and 4) draw conclusions and refine the hypothesis

What is the mass of an unknown object that has a volume of 20 mL and density of 3.5 g/mL?

Answers

Answer:

70

Explanation:

density=mass/volume

therefore mass = density*volume

20*3.5=70

Which statement best describes the role of the nervous system? *
5 points
collects waste produced by cells and removes it from the body
O it breaks down food, absorbs nutrients, and gets rid of solid waste
O
the network of nerve cells and fibers that transmits nerve impulses between parts of
the body
O
brings oxygen into the lungs and releases carbon dioxide and water (waste materials)
from the body.

Answers

Answer:

The network of nerve cells and fibres that transmits nerve impulses between parts of the body.

Answer:

THE STATEMENT WHICH BEST FITS THE NERVOUS SYSTEM IS:THE NETWORK OF NERVE CELLS AND FIBRES THE TRANSMITS NERVES IMPULSES BETWEEN PARTS OF THE BODY.

Which statement about exothermic reactions is true?
The reaction container always feels cold.
The reactants have more heat energy than the products.
O Energy from an outside source is continuously being added.
More heat is given off than is put into the reaction.

Answers

Answer:

The reactants have more heat energy than the products.

Explanation:

The reactants in an exothermic reaction have higher potential heat energy than the products, this is because they release the energy as heat.

Answer:

just took test is the reactants have more heat

Explanation:

Why are ions formed?

Answers

Answer:

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells.

Explanation:

When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.

Where is most of the mass of an atom located? O it is split between the nucleus and the orbits Oin the electrons Oin the nucleus Oin the orbits​

Answers

Answer:

In the nucleus.

Explanation:

write down the group numbers for carbon,oxygen,nitrogen and sulphur
​

Answers

Answer:

Carbon - 14

Oxygen - 16

Nitrogen - 15

Sulphur - 16

Explanation:

The question above is related to the "Periodic Table of Elements" which shows the proper arrangement of elements in a table. Every element falls on a group/family within the table. Each group has its own number, and the table has a total of 18 groups (from left to right). They are classified according to similarities in their characteristics. For example, group 1 is composed of alkali metals while group 2 is composed of alkali earth metals.

1
Which of the following parts of Dalton's Atomic Theory IS supported by
Thomson's and Rutherford's model?
Everything is made of atoms
Electrons are larger than atoms
Atoms are indivisible
Atoms take the form of a solid sphere

Answers

Answerfirst one

Explanation:

There are many types of forces. Which statement best compares an electrical force to gravitational force?


A. Electrical forces hold small objects near eachother and gravitational forces hold large objects near each other.

B. Electrical forces depends on the type of charge and gravitational forces depend on the mass of the objects and how far apart they are.


C. Electrical forces are attractions between similar types of charges and gravitational forces are attractions between similar size of objects.


D. Electrical forces require that the objects are in contact with eachother and gravitational forces require the objects are far from each other.​

Answers

The answer is B.

Opposite charges attract to each other. Alike charges repel each other. We’ve been taught this since elementary school. So, charges determine the electrical force.

Newton’s Law of Gravity essentially says the gravitational force is reliant on the mass of the two bodies and the distance squared between them.

To debunk answer A, you could think of magnets. Then compare that system to something like idk, a set of balls that are smaller than the magnets. According to A, the gravity between the balls would be from the electrical force which is beyond incorrect. And the force between the magnets is from gravity, which is also incorrect. Size doesn’t matter

How do you solve that with fractions

Answers

Answer:

bacon

Explanation:

nator

Answer:

1.57

Explanation:

nator

3. If Dr. Birdley is packing a if Dr.Birdley is packing a snowball, which of
the following properties is likely to increase?
a) mass
b) volume
c) density
d) weight

Answers

Answer:

c. density

hope this helps :)

Explanation:

In the early 1900's many scientists thought that an atom consisted of a positive substance with negative charges scattered throughout the substance. Then Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom. His discovery led to the understanding that an atom consists of mostly empty space with

Answers

The question is incomplete; the complete question is;

In the early 1900s many scientists thought that an atom consisted of a positive substance with negative charges scattered throughout the substance. Then Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom consists mostly of empty with space with-

Protons orbiting a dense nucleus made of electrons and neutrons

Electrons orbiting a dense nucleus made of protons and neutrons

Neutrons and protons orbiting a cloud of electrons

Electrons and protons orbiting a cloud of neutrons

Answer:

Electrons orbiting a dense nucleus made of protons and neutrons

Explanation:

Rutherford established the nuclear theory of the atom by his famous experiment. In his experiment, alpha particles were used to bombard a thin gold foil and the movement of the particles was observed on a moveable zinc sulphide screen.

It was discovered from the experiment that the atom was mostly made up of empty space. The electrons orbit a dense nucleus comprising of protons and neutrons.

can someone help and lmk if my answers are correct i don’t think they are please help i’ll give brainliest thank you

Answers

Answer:

5=C, every action has an equal or opposite reaction,

6=B, since it has less air drag and more force exerted on it

7= You're correct

Which of the following is an example of chemical weathering?

A. Splitting of rick due to expansion of water

B. Shrinkage of rock when the water is evaporated

C. Erosion due to wind-blown sand

D. Cave formation from the acid in water dissolving limestone

Answers

Answer:

d

Explanation:

disolving is a chemical like word and if a limestone cave is forming from the acid in the water thats chemical wheathering!

Answer:

Cave formation from the acid in water dissolving limestone

Explanation:

Which substance gets broken down in a homogeneous mixture?

colloid
solution
solute
solvent

Answers

Answer:

Should be Solute

Explanation:

I looked it up ;)

Answer:

c. Solute

Explanation:

Define what chemical and radiant energy is

Answers

Radiant energy is energy contained in electromagnetic waves. These include visible light, infrared, radio waves, ultraviolet and microwaves. ... Chemical energy is energy stored in chemical bonds between atoms.

Photosynthesis is the transformation of radiant energy to chemical energy. Plants take in water, carbon dioxide, and sunlight and turn them into glucose and oxygen. Called photosynthesis, one of the results of this process is that carbon dioxide is removed from the air.

Good scientists have what characteristics in common?

Answers

Answer:

determination or brains

Explanation:

How many ATOMS of sulfur are present in 3.07 grams of sulfur hexafluoride ?

Answers

Sulfur tetra flouride formula is SF4   so there are 3.07 moles of sulfur ATOMS in there.

Calculate the volume, in liters, occupied by 0.960 mol of oxygen gas at STP.

Answers

Answer:

21.504 liters

Explanation:

Given: 0.960 mol

Volume: ?

Molar Volume at STP = 22.4 liters

0.960 mol × 22.4 L/ 1 mol =

0.960 × 22.4 L = 21.504 L

What is the mass of a sample containing 3.5 moles of silicon atoms?
28 g
72g
98 g
35 g

Answers

The answer is c .”98 g “

How do you call when a substance goes from a solid to a liquid?

Answers

Answer:

Melting point as a chemistry concept

The solid begins to go from a solid state to a liquid state — a process called melting. The temperature at which melting occurs is the melting point (mp) of the substance.



calculate the mass of onygen gas whose
volume is 320mL at 17 degree celsius and 2 atm Pressure​

Answers

Answer:

The mass of oxygen gas is 0.96 g.

Explanation:

Given data:

Mass of oxygen gas = ?

Volume of as = 320 mL (320mL × 1L /1000 mL = 0.32 L)

Temperature of gas = 17 °C

Pressure of gas = 2 atm

Solution:

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.

17+273 = 290 K

Now we will put the values in formula.

2 atm × 0.32 L = n × 0.0821 atm.L/ mol.K   × 290 K

0.64 atm.L =  n × 23.81 atm.L/ mol.

n = 0.64 atm.L / 23.81 atm.L/ mol.

n = 0.03 mol

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 0.03 mol × 32 g/mol

Mass = 0.96 g

The mass of oxygen gas is 0.96 g.

The mass of oxygen will be "0.96 g".

Given:

Volume,

V = 320 mL

or,

           = 0.32 L

Temperature,

T = 17°C

or,

           = 290 K  

Pressure,

P = 2 atm

General gas constant,

R = 0.821 atm.L/mol.K

As we know the formula,

→ [tex]PV = nRT[/tex]

By substituting the values, we get

[tex]2\times 0.32=n\times 0.0821\times 290[/tex]

     [tex]0.64=n\times 23.81[/tex]

         [tex]n = \frac{0.64}{23.81}[/tex]

            [tex]= 0.03 \ mol[/tex]

hence,

→ Mass of oxygen = [tex]Number \ of \ moles\times Molar \ mass[/tex]      

                               = [tex]0.03\times 32[/tex]

                               = [tex]0.96 \ g[/tex]

Thus the above answer is right.

Learn more:

https://brainly.com/question/14049502

You are feeling ill, you go to the doctor, explain how he would use the scientific method to determine what is wrong with you

Answers

The doctor would form a hypothesis based on your symptoms. If you have a cough for instance, then s/he could hypothesize that you have a cold or flu. From that hypothesis, they would gather data in the form of measuring your vitals and so on. Using that data, they would be able to confirm the hypothesis, or reject it in form of some alternative.

1/10 = square root of x

Answers

Answer:

x = 1/100 = 0.01

Explanation:

1/10 = √x

(1/10)² = (√x)²

1/100 = x

or x = 0.01


A geologist drew a diagram illustrating a section of a boundary between two
tectonic plates. His diagram includes the geologic feature shown below.

Answers

Answer:

pls complete your question

When the temperature goes up, the volume will also go up
What is the possible reason?
Mention one real-world example?

Answers

Answer:

Yes it will

An example is ice, when it melts the volume goes up which means it occupies much more space

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