What is the mass of an electron? Please help

Answers

Answer 1

Answer:

9.10938356 × 10-31 kilograms

Explanation:

lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg, which is only 1/1,836the mass of a proton.

Answer 2

Answer: Hope This Helps

Explanation:

Here's just some additional information: Electron Mass In physics, the electron mass or mass of electron or electron rest mass one of the fundamental constants and is defined as the mass of a stationary electron. Denoted by m e. The value of electron mass is also known as the invariant mass of an electron

(Also, the screenshot is the answer. Also, can i have brainliest so i can go to next rank! Thanks and have a blessed day!)

What Is The Mass Of An Electron? Please Help

Related Questions

True or false gases have no mass

Answers

Answer:

Gases have mass, because they are made up molecules which have mass

In the given question, the given statement about gases have no mass is false.

The amount of substance in a thing is measured by mass, which is a physical attribute of matter. It is usually expressed in grams (g) or kilograms (kg).

Gases do have mass. The statement is false because gases consist of molecules that have mass.

Various ways can be used to determine the mass of a gas, such as weighing the container in which the gas is contained before and afterwards the gas is supplied. Additionally, the ideal gas law,[tex]\rm PV = nRT[/tex], includes the variable "n" which represents the number of moles of gas, indicating that gases do indeed have mass.

Therefore, the given statement is false about gases having no mass.

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Explain to the people of Westfield what is in their water.

Answers

The presence of rust in the water of Westfield is the reason for the change in colour.

Reason for reddish colour of water

The water of Westfield has reddish-brown substance. This reddish brown substance in the water is the rust which formed due to the chemical reaction between the iron pipes and the fertilizer substance present in the water.

Due to this reaction, the colour of Westfield's water is different from normal type of water so we can conclude that the presence of rust in the water of Westfield is the reason for the change in colour.

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Which of the following is a property of carbon atoms?
They are chemically inert.
They have six valence electrons.
They readily give up two electrons
They are found in all living things.

Answers

They are found in all living things. Hence, option D is correct.

What is an atom?

An atom is any particle of matter which contains at least one proton.

Carbon is stored in plants and trees. Plants take carbon dioxide from the atmosphere to make the building blocks of food during photosynthesis. Carbon is stored in the hydrosphere and dissolved in ocean water and lakes. Carbon is used by several organisms to produce shells.

Hence, option D is correct.

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2. Find the Volume of 3.00 mol of gas whose temperature is 60.0 C and whose pressure is 5.00 L.
3. Find the tempature of 1.50 mol of gas whose pressure is 4.00 atm and whose volume is 7.50L
4. Find the number of moles of a certain ideal gas whose volume, tempature and pressure are 3.00 L, 25.0, and 2.00 atm, respectively
Please show work I will give you a 5 star review and much points

Answers

Answer:

2. 16.4 L

3. 243.6K

4. 0.25mol

Explanation:

Using the ideal gas formula for the series of questions in this case, we have;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

QUESTION 2:

V = ?

P = 5 atm

n = 3 mol

T = 60°C = 60 + 273 = 333K

PV = nRT

5 × V = 3 × 0.0821 × 333

5V = 82.02

V = 82.02/5

V = 16.4 L

QUESTION 3:

P = 4 atm

V = 7.5L

n = 1.5mol

T = ?

PV = nRT

4 × 7.5 = 1.5 × 0.0821 × T

30 = 0.123T

T = 30/0.123

T = 243.6K

QUESTION 4:

P = 2.00 atm

V = 3L

n = ?

T = 25°C = 25 + 273 = 298K

PV = nRT

2 × 3 = n × 0.0821 × 298

6 = 24.47n

n = 6/24.47

n = 0.25mol

Can animals and plants adapt to climate changes?

Answers

Answer:

Yes but will take a very very long time for them to adapt most will die but as gemeration passes they will get used to it

6/10
For the following reaction:
CO + CuO - Cu + CO2
40 g of carbon oxide is reacted with 90 g of copper oxide.
Which is the limiting reactant?
(Molar mass of CO = 28 g/mol, molar mass of CuO = 80 g/mol)

a: CO2
b: CuO
c: CO
d: Cu

Answers

Answer:CuO

Explanation:

The limiting reagent is the reactant which usually determines when the reaction will stop. The limiting reagent depends on the mole ratio, not on the masses of the reactants present. Here the limiting reactant is .The correct option is B.

The reactant which is entirely used up in a reaction is defined as the limiting reagent. The exact quantity of the reactant which is needed to react with another element can be obtained from the reaction stoichiometry.

Here the masses are converted into moles as:

Moles of CO = 40 / 28 = 1.42

Moles of CuO = 90 / 80 = 1.12

Divide the moles obtained with the coefficients to find the limiting reagent. The smaller number is the limiting reagent.

So CuO is the limiting reagent.

Thus the correct option is B.

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Which of the following correctly describes a weak acid?
O It completely ionizes.
0 It produces hydroxide ions.
O It partially ionizes.
O It produces hydronium ions that are less effective than those from strong acids.

Answers

Answer:

It partially ionizes

Explanation:

Higher tier) Weak acids only partially ionise in water. Only a small fraction of their molecules break into hydrogen ions when added to water.

Will give brainly NEED CHEM HELP

Answers

Answer:

X is hydrochloric acid solution, Z is sodium chloride solution and Y is sodium hydroxide solution.

Explanation:

I will try be as detailed as possible.

Litmus paper:

-Short summary: Bases will turn blue and red litmus papers to blue and acids will turn blue and red litmus papers to pink while the pink will remain pink.(Simple Mnemonic: You can say B from base turns blue litmus blue and the others are the opposite).

-Also, neutral solutions will have not cause any color change on litmus papers. This is because litmus papers have a color change in the presence of H+ from acids and Oh- from bases. So, blue litmus paper remains blue and red litmus paper remains pink.

-Hydrochloric acid solution is a strong monoprotic acid because it fully dissociates to produces H+ ions. Therefore, in the presence of blue and pink litmus papers it will turn the blue to pink and the pink will remain pink.

-Sodium chloride solution is a neutral solution because it dissociates to Na+ and Cl- which do not play a role in the color change.

-Sodium hydroxide solution is a strong monoprotic base hence it fully dissociates to produce OH- no wonder the high pH value.

pH value:

-Acids have a pH value is <7 while pH of neutral solutions is 7 and basic solutions is >7.

-So from this analogy we can say that hydrochloric acid solution is 2,sodium chloride solution is 7 and sodium hydroxide solution is 10.

Universal indicator:

-A universal indicator gives a more precise data as compared to litmus because it not only identifies the type of the solution (acidic, basic or neutral) it also tells us the strength of the solution by comparing the color of the solution when the universal indicator is added against the pH universal indicator scale.

-Unfortunately ,the colors are quite a lot and I cannot type all of them but you could search for 'pH universal indicator scale' to clearly see the whole thing.

-In the scale, you can see that after addition of the universal indicator, sodium chloride solution neutral solutions (pH7) will give a green color, hydrochloric acid solution (pH=2) which is a strong acidic solution will give a red color and sodium hydroxide solution (pH=10) which is a strong base will give a blue solution.

Reaction with Magnesium:

-I'd like to recommend also that you search for 'metal reactivity' so that you can be able to see the trend .

-A highly reactive metal can displace a low reactive metal but a low reactive metal cannot displace a high reactive metal under normal  conditions.

-So, for sodium hydroxide and sodium chloride solutions with magnesium ,magnesium cannot displace  sodium because sodium is one of the most reactive metals therefore there will be no change.

-For hydrochloric acid solution, the reaction will take place because Magnesium is more reactive than hydrogen thus can be able to displace hydrogen ions and form Magnesium chloride solution.

~I hope this will help. All the best:)

Anyone know this question

Answers

Hope that this helps, lmk if you need clarification

COULD SOMEONE PLEASE GIVE ME THE ANSWER FOR THIS NO BOTS PLEASEEE TODAY IS THE LAST DAY FOR MISSING WORK!!!!

Answers

Answer:

:D

Explanation:

8. D. All of the above

9. C. Mechanical weathering

10. D. All of the above

Answer:

8. D

9. A

10. D

Which is NOT a way to accelerate an object? *
do not disturb it
speed it up
change it’s direction
slow it down

Answers

Slow it down - I believe?

A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How
many moles of gas does the tank contain?

Answers

Answer:

600.7 moles

Explanation:

Applying,

PV = nRT................... Equation 1

Where P = Pressure of oxygen, V = Volume of oxygen, n = number of moles, R = molar gas constant, T = Temperature.

make n the subject of the equation

n = PV/RT............... Equation 2

From the question,

Given: P = 190 atm, V = 35 L, T = 135 K

Constant: R = 0.082 atm.dm³/K.mol

Substitute these values into equation 2

n = (190×35)/(135×0.082)

n = 600.7 moles of xygen

What molecule is needed to digest milk?

Answers

Answer:

For example, the sugar found in milk is called lactose. With the aid of the enzyme, lactase, the substrate, lactose, is broken down into two products, glucose and galactose. People who don't make enough lactase have trouble digesting milk products and are lactose intolerant.

when 32 grams of aluminum react, the actual yield is 105.5 grams, what is the percent yield?

Answers

Answer:

329.7%

Explanation:

Percent Yield = Actual Yield/ Theoretical Yield x 100%

Percent Yield = 105.5g/32 x 100% = 329.69 ≈ 329.7 %

HELP! Calculate the pH of the following solutions:
a) [OH-] = 3.1x10^-8 M
pH = 7.51
pH = 3.18
pH = 8.00
pH = 6.49
pH = 3.10

b) [H3O+] = 5.2x10^-7 M
pH = 7.72
pH = 7.00
pH = 6.28
pH = 5.27
pH = 5.20

c) [OH-] = 5.9x10^-5 M
pH = 5.00
pH = 5.90
pH = 4.23
pH = 5.59
pH = 9.77

d) [OH-] = 5.9x10^-3 M

Answers

a) is 6.49
b) is 6.28
c) is 9.77
d) ph is 11.77

Answer:

Adding base causes the pH of a solution to increase

pH is a measure of the hydrogen ion concentration of a system. Solutions with a low pH possess a high concentration of hydrogen ions, while solutions with a high pH possess a low concentration of hydrogen ions. To increase the pH of a solution, base can be added to it. Base will release hydroxide ions (OH-) in the solution which will neutralize or reduce the H+ ions concentration in the solution. This way the pH is increased.  

Explanation:

A gas occupies a volume of 60 L at a temperature of 0.5 K. What will the volume be at 4 K?

Answers

Answer:

480 L

Explanation:

In order to solve this question, you should be familiar with gas laws. (I will attach a picture showing all of them under my answer.) In this question in particular, however, we only need Charles's Law because we're dealing with temperature and volume.

As we can see, Charles's Law is:

[tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]

or, initial volume over initial temperature equals final volume over final temperature.

In this question, 60 L is our initial volume, and 0.5 K is our initial temperature (K being Kelvin). We are only given 4 K as our final temperature. We are asked to solve for the final volume. Let's set up the equation and solve for [tex]V_{2}[/tex]:

--------------------------------------------------------------------------------------------------------------

(60) / (0.5) = [tex]V_{2}[/tex] / (4)

120 = [tex]V_{2}[/tex] / 4

×4           ×4

[tex]V_{2}[/tex] = 480 L

--------------------------------------------------------------------------------------------------------------

There's our answer! Feel free to comment if you have any questions about my answer :)

A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature

Answers

A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature is 105°C ?

Explanation:

[tex] \frac{V _{1} }{T _{1}} = \frac{V _{2} }{T _{2}} \\ \frac{(900)}{(27 + 273)} = \frac{V _{2}}{(105 + 273)} \\ V _{2} = \frac{340200}{300} \\ V _{2} = 1134 \: ml[/tex]

All of the following describe the unique role of water except-

Water is polar and cannot dissolve nonpolar compounds such as oil

Water is considered a universal solvent because it can dissolve more substances than any other liquid.

Water is nonpolar and can dissolve nonpolar compounds such as oil

Water has the ability to form hydrogen bonds

Answers

option c
water is non polar and can dissolve non polar compounds such as oil
water is unable to dissolve or mix with substances like oil therefore making the statement false

BRAINLIEST IF RIGHT!! Write 200.0398 in 2 sig figs.

Answers

Answer:

20

step by step explanation:

the answer would be 200

How many Joules of energy are given off when 50 grams of water are cooled from 65-50 degrees Celsius?
3200
3138
47.83

Answers

Answer:

3200

Explanation:

because it would book it up first to evaporate it next

It’s 3200 that’s ur answer (same as the following person)

Please show your work if possible!

Answers

Answer:

54.93 g/mol

Explanation:

a) the element with symbol Mn is known as Manganese and I figured it out by looking at the periodic table.

b) I took a look at the periodic table again, and seen how much the atomic mass is and from there I observed:

Mn= 54.938 g/mol

rounded is 54.94 g/mol

1.) What is the difference between renewable and nonrenewable resources?

2.) Explain why people need to begin using renewable resources instead of nonrenewable
resources.

Answers

Answer: 1.) renewable resources can be replenished as fast as they are used. Nonrenewable resources are unable to be replaced at the same rate at which they are used. 2.) nonrenewable energy sources will eventually run out, leaving people to figure out how to continue running their cars, homes, and busines. They must find alternative sources of energy. Since renewable energy resources that will never run out, it is a great option.

Explanation:

Which of the following is a base?
a. AgO
b. HF
c. Ca(OH)2
d. NaCl

Answers

Answer:

c. Ca(OH)2

Explanation:

I took the test ;)

In chemistry, bases are substances that react with an acid to yield salt. Calcium hydroxide (Ca(OH)₂) is a base as it is a hydroxide of metal. Thus, option c is correct.

What are bases?

Bases are solutes that react with acidic substances to produce water and salt. It comprises substances with hydroxide ion that reacts with hydrogen ion of acid to complete the neutralization reaction.

The carbonates, oxides, and hydroxides of metals make the base that has a pH range of below 7 up to 14. The alkalinity of the substance depends on the ability to release the hydroxide ions in the solution.

Calcium hydroxide (Ca(OH)₂) is a base as it contains OH⁻ ions that are characteristic of bases. On the other hand, NaCl is salt and HF is an acid.

Therefore, Ca(OH)₂ is a base.

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the kinetic theory of matter states that the atoms of a diamond are. | A. Transparent B. Always Moving C. Reflectors of light D. Extremely Hard

Answers

Answer:

Always moving!

Explanation:

matter is composed of very small atoms and molecules that are always in contant motion

Planets X and Y orbit each other in space. Which changes would have the greatest effect on increasing the gravitational attraction between the two planets?

Group of answer choices

Halving the mass of planet X and doubling the distance between the planets

Halving the mass of planet X and halving the distance between the planets

Doubling the mass of planet X and halving the distance between the planets

Doubling the mass of planet X and doubling the distance between the planets

Answers

Answer:

halving, the mass of planet X and halving the distance between the planets

The gravitational force of attraction is the fundamental force of the universe. Doubling the mass of planet X and halving the distance between the planets increases the gravitational attraction. The correct option is C.

What is gravitational attraction?

The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them. The formula of gravitational force is given as:

F = G m₁m₂ / r²

From the equation it is clear that the gravitational force increases with the increase in the mass and decreases with the increase in the distance between the objects. This law is true for each particle of matter, each particle of matter attracts every other particles.

Here doubling the mass of planet X and halving the distance between the planets increases the gravitational attractive force.

Thus the correct option is C.

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a deep underground cavern contains 2.24 x 10^6 L of methane (CH4) gas at a pressure of 15.0 atm and a temperature of 42 C. How many moles of methane does this natural gas deposit contain?

Answers

Answer:

This natural gas deposit contains 1,300,813.008 moles.

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

P= 15 atmV=2.24*10⁶ Ln= ?R= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 42 C= 315 K (being 0 C= 273 K)

Replacing:

15 atm* 2.24*10⁶ L= n*0.082 [tex]\frac{atm*L}{mol*K}[/tex]* 315 K

Solving:

[tex]n=\frac{15 atm* 2.24*10^{6}L }{0.082\frac{atm*L}{mol*K}*315 K}[/tex]

n=1,300,813.008 moles

This natural gas deposit contains 1,300,813.008 moles.

If it requires 75.0mL of 0.500M NaOH to neutralize 165.0 mL of an hcl solution what is the concentration of the hcl solution

Answers

Answer:

0.027 M HCl

Explanation:

The chemical equation of the neutralization is:

1 NaOH + 1 HCl -> 1 H2O + 1 NaCl

Because the ratio of NaOH and HCl is 1:1 you can use the M1V1=M2V2 formula.

(75 mL)(0.5 M NaOH) = (165 mL)(M HCl)

It requires 0.027 M HCl.

Answer is C

Zeke is attempting to react a piece of magnesium metal with sulfuric acid. The sulfuric acid is a 5M solution. What could Zeke do
to slow down the rate at which the magnesium will react with the acid?
A)
increase the temperature
B)
add a 10M sulfuric acid solution
9)
add water to the acid to decrease its molarity
D)
add more of the 5M sulfuric acid to the reaction

Answers

Answer:

c)

Explanation:

add water to the acid to decrease its molarity

Using the balanced equation for the next few questions: 4 Fe(s) + 30 (9) - 2Fe2O3(s)
How many moles of Iron (11) Oxide would be produced by complete reaction of 0.15
moles of iron? (Be sure to show your work including the mole ratio you used)

Answers

Answer:

0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.

Explanation:

The balanced reaction is:

4 Fe + 3 O₂ → 2 Fe₂O₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Fe: 4 molesO₂: 3 molesFe₂O₃: 2 moles

You can apply the following rule of three: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, 0.15 moles of Fe produce how many moles of Fe₂O₃?

[tex]moles of Fe_{2} O_{3} =\frac{0.15 moles of Fe*2 moles of Fe_{2} O_{3} }{4 moles of Fe}[/tex]

moles of Fe₂O₃= 0.075

0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.

Review the equation below.

2KClO3 Right arrow. 2KCl + 3O2

How many moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose?

Answers

2KClO3 --> 2KCl + 3O2

3 moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose.

Answer:

The answer is 3

Explanation:

I did the test on Edge

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