Calculate the molar mass of a sample if a single molecule weighs 2.55 x 10^-23 g.

Answers

Answer 1

molar mass= energy x mass= 10 x 2.55 x 10^-23

Answer 2

Avogadro's number (NA) or Avogadro's constant (6.0221 x 10^23). The term "mole" is defined as that one mole of a substance with a molecular (or atomic) mass of one (1), will have a mass of 1 gram.

What is Avogadro's number?

The number of molecules in one mole is 6.022 * 10^ 23 numbers. The molecular mass of the molecule is 2.55 x 10^-23

Molar mass can be defined as 'mass per mole.' In other words, molar mass is the sum of the mass of all the atoms found in one mole's worth of a substance. It is expressed in units of grams per mole.

Molar mass is depicted for elements or molecules. In the case of single elements or individual atoms, the molar mass would just be the element's mass expressed in atomic mass units.

Molar mass =  2.55 x 10^-23/ 6.022 * 10^ 23

                   = 0.423

Therefore, Avogadro's number (NA) or Avogadro's constant (6.0221 x 10^23). The term "mole" is defined as that one mole of a substance with a molecular (or atomic) mass of one (1), will have a mass of 1 gram.

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Related Questions

which of these solution is most basic

Answers

Answer:

There is nothing to answer lol

Where’s the solutions??

The central dense region in an atom

Answers

Answer:

Explanation:

The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. The nucleus is just a tiny part of the atom, but it contains virtually all of the atom's mass.

An elastic band with a spring constant of 62 N/m is extended by 0.15 m. What is the force applied to the rubber band?

Answers

Answer:

the force applied to the rubber band is -9.3N

Explanation:

The computation of the force applied to the rubber band is shown below;

We know that

Force in newtons = Spring constant × amount of extension

F = -k × x

where

-k = 62 N/m

And, x = 0.15m

So, the force applied is

= -62N/m × 0.15m

= -9.3N

hence, the force applied to the rubber band is -9.3N

the force applied to the rubber band is -9.3N

Explanation:

Which term describes this diagram?

A) Element
B) Compound
C) Mixture

Answers

Answer:

b

Explanation:

the answer is B- compound

What does the area between points D and E represent for the substance on the heating curve below?
A freezing point
B melting point
C boiling point
D sublimation point

Answers

Answer:

C. Boiling Point

Explanation:

A to B represents heat being added to the substance in a solid state, making B to C the melting point. C to D represents heat being added to the substance in a liquid state, making D to E the boiling point as the liquid is converted to a gas.

Hope this helps!

C. boiling point hahashhshddhdbvfbb for more words have a nice day

A 50.00 L sample of gas collected in the upper atmosphere at a pressure of 18.30 torr is compressed into a volume of 0.1500 L. What is the final pressure?

Answers

Answer:

the ans is in the picture with the steps  

(hope it helps can i plz have brainlist :D hehe)

Explanation:

The concept Boyles law is used here to determine the final pressure of the gas. Boyle's law was put forward by the Anglo-Irish chemist Robert Boyle in the year 1662. The final pressure of the gas is  7.66 atm.

What is Boyles law?

At constant temperature, the volume of a given mass of gas is inversely proportional to its pressure. It can also be explained as at constant temperature, the product of pressure and volume of a given mass of gas is constant.

A straight line graph is obtained when pressure is plotted against the inverse of the volume.

Mathematically the law can be expressed as:

V∝ 1/P

PV = k (Constant)

Here 'V' is the volume and 'P' is the pressure of the gas.

For two different gases, the equation is given as:

P₁V₁ = P₂V₂

P₂ = P₁V₁ / V₂

1 torr = 0.00131 atm

P₁ = 0.023 atm

0.023 × 50.00  / 0.1500 = 7.66 atm

Thus the final pressure is 7.66 atm.

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What is the total number of grams of potassium fluoride
(molar mass = 58 g/mol) needed to make 9.4 liter of a 6.17 M solution?

Answers

Explanation:

molarity=no. of moles of solute/solution in litres

6.17M=no. of moles of solute/9.4 L

6.17×9.4=no. of moles of solute

57.9 =no. of moles of potassium fluoride KF

no. of moles=given mass /molar mass

57.9=given mass/58

3358.2 g

Calculate the volume in mL of 53.2 g of .251M solution of HCl.
Show work please

Answers

Answer:

5.813 mL

Explanation:

You need to use the formula : vol = mass / molar mass x molarity

the molar mass of HCl is 36.46 and the problem gives you the rest of the equation

0.251M x 36.46 = 9.151

53.2g / 9.151 = 5.813 mL

*I don't know some of the units so that's why some of them are blank sorry

*I'm also sorry if this is wrong but it's what I did so..

Use the following equation to answer the questions that follow.

Fe + 2 HCl --> FeCl2 + H2

a. If you have 3.000 moles of HCl, how many moles of gas could you make?

b. If you have 6.132 moles of each reactant, which one will run out first?

c. Based on your answer from (b), how many grams of FeCl2 would you expect to make?

d. How many moles of Excess Reactant reacted based on (b)?

e. How much Excess Reactant is left over, in moles, from (b)?

f. When actually carrying out the experiment with 6.132 moles of each reactant, you make 310.2grams of iron(II) chloride. What is your percent yield?

Answers

Sksklerodlekmdndleoeojfnfroror

In the Tough Man Competition, very strong men are challenged to push or pull extremely large and heavy objects to test their strength. In
one such challenge, they were asked to push one of two rail cars, an engine car and a box car. The data tables show one man's results.
Look over the data table and answer the questions below.

Force Applied by the
Tough Man
Did it move the
engine car?
No
Did it move the
boxcar?
No
1000 Newtons
2000 Newtons
No
No
3000 Newtons
Yes
No

Answers

sorry i don’t know the answer i just wanted to inform you that, that persons link is fake.

The levels of organizations in multicellular organisms are shown below, but they are not in the correct order. Arrange the levels of organization in order from simplest to most complex.

Answers

The question is incomplete, the complete question is;

The levels of organizations in multicellular organisms are shown below, but they are not in the correct order. Arrange the levels of organization in order from simplest to most complex. tissues organs whole organisms organ systems

Answer:

tissues --> organs --> organ system --> whole organisms

Explanation:

The levels of organizations in multicellular organisms refers to the increasing complexity of the components of the organism.

A tissue is an aggregation of cells hence it is the lowest level of organization here.

Organs are an aggregation of tissues, this is the next higher level of organization.

Organ systems are an aggregation of organs, this is the next higher level of organization.

Whole organisms are an aggregation of organ systems. This is the highest level of organization.

?
9. Oxygen will have a positive oxidation number
when combined with
(1) fluorine
(3) bromine
(2) chlorine
(4) iodine
in

Answers

Answer:

Flourine

Explanation:

Oxidation number will be +1 for oxygen and -1 for Flourine

Explain why alkanes can be described as hydrocarbons.

Answers

Answer:

The International Union of Pure and Applied Chemistry (IUPAC) defines alkanes as "acyclic branched or unbranched hydrocarbons having the general formula CnH2n+2, and therefore consisting entirely of hydrogen atoms and saturated carbon atoms". ... The number of carbon atoms may be considered as the size of the alkane.

w
In your own words, what does the law of
conservation of energy tell us? Hint: It is
VERY similar to the law of conservation
of matter (we studied that in the first
semester).

Answers

Answer:

The law of conservation of mass States that matter can never be created or destroyed during c

Which of these can be recycled in an attempt to conserve resources?

aluminum

natural gas

sunlight

gasoline

Answers

Answer:

aluminum

Explanation:

Hope this helped!!!

Answer:aluminum

Step-by step:

Explain what is happening during a redox reaction.

Answers

Answer:

Redox is a sort of compound response where the oxidation conditions of particles are changed. Redox responses are described by the real or formal exchange of electrons between substance species, frequently with one animal groups going through oxidation while another species goes through decrease

Explanation:

Brainliest?

Biotic and abiotic parts of an ecosystem can actually become limiting factors for a population. Which of the following are BIOTIC limiting factors?
Sunlight availability for growth of plants
Not enough grass for deer to eat
Drought on the Savannah of Africa
Flooding due a storm surge along coastal areas.

Answers

Answer:

Option B

Explanation:

Abiotic components are non living such as temperature, climate, rainfall, soil composition, wind, sunlight etc. While biotic components are living such as  food, availability of mates, disease, and predators.

Here in this case, only option B represents a scenario where the unavailability of grass represents a biotic component

Which of the following represents an increase in kinetic energy?
A. Cooling steam from 165°C to 100°C
B. Melting 45g of ice
C. Condensing 60g of steam
D. Heating ice from -50°C to 0°C

Answers

Answer:

C

Explanation:

Tetrachloroethene, C2C14 is a solvent used in many dry cleaning processes.
Write the empirical formula for tetrachloroethene.

Answers

An empirical formula presents the atoms of all the elements with the most simplified whole number ratios. In other words, divide each subscript by their greatest common factor.

The greatest common factor of 2 and 4 is 2.

2/2 = 1

4/2 = 2

So, the empirical formula for tetrachloroethene is CCl₂.

5.97 g of fluorene is added to 0.250 kg of benzene and it was
found that the freezing point of benzene decreased by 0.737
°C. What is the experimental molar mass of fluorene? Kf of
benzene = 5.12 K. kg/mol, van't Hoff factor of fluorene = 1.__g/mol

Answers

Answer:166

Explanation:

44 mL of H2CrO4 is needed to neutralize 176mL of a 10M solution of Pd(OH)4. What is the molarity of this solution?

Answers

Answer: The molarity of this solution is 2.5 M.

Explanation:

Given : [tex]V_1 = 44 mL[/tex],           [tex]V_2 = 176 mL[/tex]

[tex]M_1 = 10 M[/tex]

Therefore, the value of molarity of the solution is calculated using following formula.

[tex]M_1 \times V_1 = M_2 \times V_2[/tex]

Substitute the values into above formula as follows.

[tex]M_1 \times V_1 = M_2 \times V_2\\10 M \times 44 mL = M_2 \times 176 mL\\M_2 = \frac{10 M \times 44 mL}{176 mL}\\= 2.5 M[/tex]

Hence, molarity of the solution is 2.5 M.

Food chains always begin with what type of organism? Why?

Answers

The food chain always begins with a sun without it there would be no food chain... hope this helped!

Please help i need help with this (if you can’t see the last one it says thermal)

Answers

Answer:

it would have sound a

thermal .why a train needs coal and coal get burned by heat that is thermal energy and sound beacuse a train makes sound by moving

Explanation:

have a good day /night

may i please have a branlliest

the charge of the atom is​

Answers

Answer:

the charge of an atom is zero.

Explanation:

i hope this is what you were asking for.

Which sentence best describes the relationship between genes and chromosomes?
A.
Genes are found within chromosomes.
B.
Several chromosomes make up one gene.
C.
Genes and chromosomes are the only things that form the nucleus.
D. Several genes are attached to different parts of the Golgi apparatus.

Answers

Answer:

A

Explanation:

What is the volume, in liters, of 0.250 moles of carbon monoxide at STP?

Answers

Answer:

5and I carbon dioxide and water

Answer:

5.6 L

Explanation:

Calculated it leads to the answer 5.6L

PLEASE HELP
Find the kinetic energy of the horse using KE=1/2mv^2.

Answers

Answer:

78878

Explanation:

The Law of Conservation of Mass state

Answers

The answer is B. Or the second one

how to calculate density (what’s the formula)
density=_ divided by _

Answers

Answer:

density equals weigt divided by volume

Explanation:

[tex]density = \frac{m}{v} [/tex]

The second period at the bottom of the table is called

Answers

Answer:

Actinides

Explanation:

The actinides are valuable primarily because they are radioactive.

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