1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Paraphin [41]
4 years ago
10

M (2.1) 2. How many moles is 2.55 x 1026 atoms of Neon? 3 Vou bout 20 r.

Chemistry
1 answer:
Olenka [21]4 years ago
6 0

Answer:

423.44 moles

Explanation:

We need to find no of moles in 2.55\times 10^{26}\ \text{atoms} of Neon.

We know that,

1\ \text{mol of atoms}=6.022\times 10^{23}\ \text{atoms}

2.55\times 10^{26}\ \text{atoms}=2.55\times 10^{26}\ \text{atoms}\times \dfrac{1\ \text{mol}}{6.022\times 10^{23}\ \text{atoms}}\\\\=423.44\ \text{mol}

It means there are 423.44 moles in 2.55\times 10^{26}\ \text{atoms} of Neon.

You might be interested in
Is drying wet clothes a physical or chemical change
grandymaker [24]
Drying clothes is a physical change, because it is not permanent. The clothes could just be wettened again, therefore it is not a chemical change.

~Hope I helped!~
8 0
4 years ago
Read 2 more answers
Which of the following will stay constant, no matter if the substance is in the solid, liquid, or gas state? volume shape temper
Harman [31]

Answer : The correct option is, Mass

Explanation :

As we know that there are 3 states of matter :

Solid state : It is a state in which the particles are closely packed and does not have any space between them. This state have a definite shape and volume.

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state have a definite volume but does not have a fixed shape.

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. This state have indefinite volume as well as shape.

If we are taking 100 grams of ice then after melting its mass remains same but its shape, volume and temperature will be changed and after evaporation its mass remains same but its shape, volume and temperature will be changed.

Hence, the mass will stay constant, no matter if the substance is in the solid, liquid, or gas state.

4 0
3 years ago
Read 2 more answers
Determine the molality of a solution of methanol dissolved in ethanol for which the mole fraction of methanol is 0.135. Give you
Alja [10]

<u>Answer:</u> The molality of the solution is 0.11 m

<u>Explanation:</u>

We are given:

Mole fraction of methanol = 0.135

This means that 0.135 moles of methanol is present in 1 mole of a solution

Moles of ethanol = 1 - 0.135 = 0.865 moles

To calculate the mass for given number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of ethanol = 0.865 moles

Molar mass of ethanol = 46 g/mol

0.865mol=\frac{\text{Mass of ethanol}}{46g/mol}\\\\\text{Mass of ethanol}=(0.865mol\times 46g/mol}=39.79g

To calculate the molality of solution, we use the equation:

Molality=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}

Where,

m_{solute} = Given mass of solute (methanol) = 0.135 g

M_{solute} = Molar mass of solute (methanol) = 32 g/mol

W_{solvent} = Mass of solvent (ethanol) = 39.79 g

Putting values in above equation, we get:

\text{Molality of methanol}=\frac{0.135\times 1000}{32\times 39.79}\\\\\text{Molality of methanol}=0.106m\approx 0.11m

Hence, the molality of the solution is 0.11 m

6 0
4 years ago
In which type of climate would the soil most likely be well developed and have lots of organic matter?
sleet_krkn [62]
I suppose it would be forest because in order to have organic matter the soil needs to be rich and fertile,therefore it is forest.
3 0
3 years ago
How many grams of N2 gas are present in 1.13 L of gas at 2.09 atm and 291 K?
solong [7]

Answer:

Mass= 2.77g

Explanation:

Applying

P=2.09atm, V= 1.13L, R= 0.082, T= 291K, Mm of N2= 28

PV=nRT

NB

Moles(n) = m/M

PV=m/M×RT

m= PVM/RT

Substitute and Simplify

m= (2.09×1.13×28)/(0.082×291)

m= 2.77g

6 0
3 years ago
Other questions:
  • The process by which increased levels of CO2 in the atmosphere lead to enhanced growth of vegetation, which then removes CO2 fro
    9·1 answer
  • Which lists mixtures, in order, from the smallest particles to the largest particles?
    5·2 answers
  • Which system works with the reproductive system? (Hint, its not C)
    6·2 answers
  • In a reaction to produce sulfuric acid, the theoretical yield is 300.g. What is the percent yield if the actual yield is 280.g?
    8·1 answer
  • Please help me with this question
    8·1 answer
  • Which of the following are acid formulas? (Choose 2)
    11·1 answer
  • QUESTION 20
    15·1 answer
  • Nahco3+hc2h3o2=nac2h3o2+h2co3
    13·2 answers
  • If a substance has a density of 1.345g / mL , how many grams would the substance weigh if the sample has a volume of 22.1 ml?
    15·1 answer
  • Help asap pls, this is due in 30 minutes.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!