-1,616.7 kJ/mol
2C₂H₂(g) +50₂(g) →4CO₂(g) + 2H₂O(g)
AGC₂H₂=209.2 kJ/mol
AGE.co2=-394.4 kJ/mol
AG H2O-228.57 kJ/mol
AG 5O2 = ?
Now From the above given equation , we have got the enthalpy of no. of moles in reaction
4 moles of CO₂ contains = 4 -394.4 kJ/mol = -1577.6
2 moles of H₂O contains = 2 -228.57 kJ/mol = - 457
2 moles of C₂H₂ contains = 2 209.2 kJ/mol = +418.4
now putting all the values in equation
50₂(g) = 4CO₂(g) + 2H₂O(g) - 2C₂H₂(g)
50₂(g) = -1577.6-457-418
50₂(g) = -1,616.7 kJ/mol
The amount of heat that a system releases or absorbs during a chemical reaction is known as the enthalpy change. The symbol for it is HEnthalpy is measured in the same SI unit as energy, the joule. At constant pressure, the expression known as "enthalpy change" is computed or determined. It is impossible to measure a system's absolute enthalpy. As a result, the enthalpy change is measured. In endothermic processes, the change in enthalpy is positive, while in exothermic reactions, it is negative.To know more about Enthalpy visit : https://brainly.com/question/13775366
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blank blank blank blank blank blank blank
Answer:
what are you trying say about BLANK 7 times?????????!!!!!!!!!!!!!!
Answer:
The correct answer is blank
Explanation:
plato
How many grams of calcium chloride would you add to water for a total volume of 500 ml to make a 16% (weight/volume) solution?
The mass in grams of calcium chloride required to prepare a 16% weight/volume solution is 80 g.
What is the mass of calcium chloride required to prepare a 16% weight/volume solution?The concentration of a solution is the amount of solute present in a given volume of solution.
Concentration can be expressed as:
mass concentrationmolar concentration concentration- weight/ weight/, weight/volume/, or volume/volumeThe unit of percentage weight/volume concentration is g/mL
The mass of calcium chloride required to prepare a 16% weight/volume solution = 16% * 500 mL * 1g/mL
The mass of calcium chloride required = 80 g
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witch statment correctly describes the relationship between thermal energy and particle movement
Answer:
The faster the particles are moving, the more thermal energy they have.
Explanation:
Give me Brainliest if that helped! :)
Define with a simple definition "What is coal"?
Answer:
Coal Is A Combustible Black Or Brownish Black Sedimentary Rock With A High Amount Of Carbon And Hydrocarbons. Coal is Classified As As A Nonrenewable Coal Energy Source Necause It Takes Millions Of Years To Form .Coal Contain The Energy Stored By Plant That Lives Hundreds Of Millions Of Year Ago In Swamphy Forests .
Draw Conclusions What  conclusions can you draw about the mechanical energy of the pendulum overtime? use evidence to support your conclusion.
The total energy in the system is constant hence mechanical energy is conserved as the pendulum moves.
What is mechanical energy?The term mechanical energy refers to energy that is at rest or in motion. The energy that is at rest is called the potential energy while the energy that is in motion is the kinetic energy. A pendulum is always used to demonstrate the principle of the conservation of mechanical energy.
According to this principle, mechanical energy could neither be created nor destroyed but is converted from one form to another. The image as shown leads us to the conclusion that mechanical energy is conserved.
We can see that the potential energy is max at the both ends and is converted into kinetic energy as the bulb moves. The total energy of the system stays the same as we can see from the graph.
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In the laboratory, a chemist generated hydrogen gas via the electrolysis of water. The chemist collected H2(g) over water and obtained 162.2 mL of gas at a pressure of 740 torr. What mass of H2 did the chemist collect?
1 torr = 0.001 atm
Therefore, 740 torr = 0.740 atm
Let us find out the volume of the gas at STP. At STP, pressure = 1 atm
Now, from Boyles law P1V1 = P2V2
where, lety P1 = pressure given = 0.740 atm
V₁ = Volume at 0.740 atm = 162.2 mL
P2= pressure at STP = 1 atm
V2= volume of the gas at STP From the formula, V₂ = P1V1/P2
Therefore, V₂ = (0.740 x 162.2) / 1 = 120.028 mL of hydrogen gas
Therefore, no. of moles of hydrogen gas obtained = 120.028/22400 = 5.36 x 10-3 moles
Therefore, mass of H2 gas the chemist collected = 5.36 x 10-3 x molar mass of hydrogen = 5.36 x 10-3 x 2 = 0.0107 g.
The gas should replace the water and you should see a bubble shape at the top of the test tube. Once the test tube is filled with hydrogen, dip another test tube into the water and place it on the hose. You can collect as much hydrogen as is produced by the reaction. A common hydrogen compound is a water. Diatomic hydrogen, that is, two atoms per molecule, can be separated from distilled water by electrical separation. This process is known as electrolysis and also produces oxygen gas. This is the easiest and safest way to collect and store hydrogen gas.
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The mass of Hydrogen collected is 0.01072 g.
Let us understand the process of electrolysis.
Electrolysis of water is splitting of water molecule into Hydrogen and Oxygen separately by using electricity. This process is also known as decomposition of water.
In this experiment performed in laboratory, the chemist collected some constants which are given to us as:
Given-
Volume of hydrogen gas collected = 162.2 mL
Pressure = 740 torr.
Using the Boyle’s Law, we can find out the pressure and volume of the gas at STP.
STP = 1 atm but the pressure is in torr so we’ll convert torr into atm.
1 torr = 0.001 atm
Therefore, 740 torr = 0.740 atm
Now, we can apply Boyle’s Law and find the volume of the gas.
Boyle’s Law = P₁ V₁ = P₂ V₂.
After substituting the values, we’ll get the volume (V₂) of the gas.
With this we can easily find out the mass of hydrogen gas collected.
The solution is shown in the image below.
Therefore, the mass of the Hydrogen collected by chemist is 0.01072g.
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PbI4 Spell out the full name of the compound.
Answer:
Lead (IV) Iodide
Explanation:
Calculate strain energy for the conformer pictured below, using strain energy increments from the table.
Strain energy for the conformer is 13.8 kj/mol
Energy of eclipsed H-H bond is 4.0 kJ mol
Energy of eclipsed Н-СH3 bond is 5.8 kJ mol
Total strain energy of conformer (S,) E=2×ECLIPSED(H-H)+eclipse(H-CH3)
Substitute, 4.0 kJ mol for eclipsed (H-H) and 5.8 kJ mol for eclipsed (H-CH thus,
E =2x4.0 kJ mol +5.8 kJ mol
E=13.8 kJ mol
When rotated about the C-C single bond and the dihedral angle is 60°, conformational isomers give various spatial configurations of a molecule. Eclipsed conformation and Staggered conformation are the two different forms of conformational isomers.Because of the larger torsional strain brought on by the hydrogen atoms linked closest to one another, the eclipsed conformation is least stable.To know more about conformation visit : https://brainly.com/question/15215912
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Help me pleaseeeeeeeee.
The force is unbalanced and is towards right with 8 newton force.
it is beacuse upward and downward forces are cancelling each other.
Unbalanced forces are those that cause an object's motion to alter.Unbalanced forces are not opposing and equal. Let's say that one tug-of-war team pulls more forcefully than the other squad. There would be an imbalance in the forces. The stronger force would be able to draw one team and push the other team in the opposite direction.Unbalanced forces can affect an object's motion in two different ways. An item will move when unbalanced forces are applied to it while it is at rest.A moving item will experience imbalanced forces, which will alter the object's velocity.To know more about Unbalanced forces visit : https://brainly.com/question/13003361
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Why is the average atomic mass in the periodic table a decimal?
Explain the ecosystem of Himalayan region and its related aspects
The westernmost portion of the subtropical belt is home to the Himalayan subtropical pine forests, which are dominated by the Chir pine (Pinus roxburghii).
What region are included in Himalayan ?Although the Himalayan region, which includes Bhutan, Nepal, northern India, Pakistan, and the Tibet Autonomous Region, is known for its mountainous topography, it also exhibits a remarkable amount of ecological diversity.
The mountains' altitude, slope, and aspect, their intricate glaciology and hydrology, as well as the climate and microclimates that the range itself shapes, all contribute to this diversity. It is visible in grasslands, temperate, tropical, and subtropical forests, as well as glacial lake and river systems, high altitude deserts, and montane regions. The region's diversity of people matches that of its ecosystem.
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1. How many molecules are in 81.3 moles of NO₂?
2. What quantity in moles of CsI are in 70.6 grams of CsI?
311.0 gallons of water converted to liters
The calculated value is 1177.263 Liters.
Remember that there is a distinction between a liquid cup and a dry measure cup, just as there is between ounces and gallons. Simply divide the quantity by 16 to determine the number of gallons from the quantity of (liquid) cups.
There are 128 ounces in a gallon, according to a free online liquid measurement conversion calculator. We now understand that there are eight water bottles in a gallon by dividing 128 by 16.9 and rounding up.
311 Gallons = 1177.263 Liters
To convert a gallon measurement to a liter measurement, multiply the volume by the conversion ratio. The volume in liters is equal to the gallons multiplied by 3.785412. There are 3.785 liters in a gallon and a liter is 0.264 of a gallon.
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what is the energy of a light with a frequency of 3000 MHz
The energy of a light with a frequency of 3000 MHz is 1.9878 × 10-²⁴ J.
How to calculate energy?Energy of a wave such as light wave can be calculated by multiplying Planck's constant by the frequency of the light as follows:
E = hf
Where;
E = energy (joules)h = Planck's constant (6.626 × 10-³⁴J/s)f = frequency (Hertz)According to this question, a light wave has a frequency of 3000 MHz. The energy can be calculated as follows:
E = 6.626 × 10-³⁴J/s × 3 × 10⁹Hz
E = 1.9878 × 10-²⁴ J
Therefore, the energy of a light with a frequency of 3000 MHz is 1.9878 × 10-²⁴ J.
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4. How an atom reacts chemically depends on how willing it is to share with others.
Answer: GoodMorning: ) ✨ How an atom reacts chemically depends on how willing it is to share electrons with others. So When copper is combined with another element, in it makes bronze, the first manmade metal alloy. Ok let me just explain it to u to make it easy 4 you to understand .
Explanation: So we should know that when An atom refers to the smallest, indivisible unit made up of matter and forms all chemical elements.
Hence, atoms are the fundamental building blocks of matter and they determine the structure of all chemical elements.
In Chemistry, an atom is made up of three (3) distinct subatomic particles and these include;
Protons.Neutrons.Electrons.Chemical reactivity determines how readily a chemical element bonds with other chemical elements by sharing its electrons with them.
As a general rule, how an atom reacts chemically is highly (largely) dependent on the number of valence electrons in the outermost shell of its atom.
In conclusion, the willingness of an atom to share electrons determines how it reacts chemically with others.
Have a Great Day: ) <3
Carbon and oxygen combine to form carbon dioxide.
A chemical equation you might write for this reaction is C(s) + O2(g) → CO2(a).
Does this equation, as it is written, follow the Law of Conservation of Mass?
Whether you answered "yes" or "no", explain how you arrived at that answer.
The percent composition by mass of tartaric acid is: 32.01% C, 4.03% H, and 63.96% O. Given that the molecular mass of tartaric acid is 150 amu, determine its molecular formula.
Molecular formula of Tartaric Acid is C ₄ H ₆ O ₆ .
As it is given that ,
C = 32 . 04 %
H = 4 . 03 %
O = 63 . 96 %
So , composition in grams is :
C = 32.04 g
H = 4.03 g
O = 63.96 g
Now we have to find no. of moles of each element :
C = 32.04 / 12 = 2.67
H = 4.03 / 1 = 4.03
O = 63.96 / 16 = 3.99
Dividing no. of moles with smallest no. of moles .
For C , 2.67 / 2.67 = 1
For H , 4.03 / 2.67 = 1.5 ≈ 2
For O , 3.99 / 2.67 = 1.49 ≈ 2
So , Empirical formula = C₂ H₃ O₃
E.F. Mass = 24 + 3 + 48 = 75 amu
Molecular mass = 150 amu
So , n = Molecular mass / E.F. Mass
n = 150 /75
n = 2
So , Molecular formula = ( C H₂ O₂ )n
= ( C₂ H₃ O₃ ) ₂
= C ₄ H ₆ O ₆
Hence , Molecular formula of Tartaric Acid is C ₄ H ₆ O ₆ .
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What were the constants?
(1) Same puzzle
All of the participants were tested with the
same puzzle.
* It would not have been a fair test if some
had an easy 30 piece puzzle and some had a
harder 500 piece puzzle.
* Other constants: (2) same
(4) same person
experiment
(3) same
the
1) Due to the fact that we are initially uncertain of the distribution of the parent population from which our sample was collected.
2) The second question is incomplete, thus I am unable to answer it.
Therefore, it is advisable to only use one sample when doing non-parametric tests like the sign test or Wilcoxon sign test (depending upon the choice of the researcher).
A physical constant, also known as a basic physical constant or universal constant, is a physical number that is often believed to be both universal in nature and to have a constant value across time. In contrast, it is described by a mathematical constant, which has a constant value but doesn't immediately call for any physical measurement.
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Select the correct term to complete each sentence. Click the button to check your answer.
The source of paper towel used, light intensity, and temperature of the room are
all select term
variables in this experiment. The addition of water to the paper
towel is the select term
variable. The number of pill bugs observed on each
paper towel over time is the select term
variable.
V
2
Answer:lol
Explanation:
The terms used to complete the statement are:
independent independent dependentIn this experiment:
Select term variables:
1. Source of paper towel used
2. Light intensity
3. Temperature of the room
The addition of water to the paper towel is the:
Independent variable (sometimes referred to as the manipulated variable or cause variable).
The number of pill bugs observed on each paper towel over time is the:
Dependent variable (sometimes referred to as the responding variable or effect variable).
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The question attached here is seems to be incomplete, the complete question is
Select the correct term to complete each sentence:
1. The source of paper towel used, light intensity, and temperature of the room are all __________ variables in this experiment.
2. The addition of water to the paper towel is the __________ variable.
3. The number of pill bugs observed on each paper towel over time is the __________ variable.
An object is determined to have a mass of 0.01080 g . How many significant figures are there in this measurement?
5 significant, because u have to start counting after the point
There are four significant figures in the given measurement as there are four non-zero numbers after the decimal.
What are significant figures?Significant figures are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.
The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:
1)All non-zero digits are significant .
2)All zeroes which occur between non-zero digits are significant.
3)All zeroes to the left and right of a non-zero digit are not significant.
4) All zeroes on right of decimal are significant if a non-zero number follows them.
5)All zeroes on right side of non-zero digit are significant.
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How many molecules are in 3.645e+02 g (grams) of potassium acetate™
Answer:
2.237 x 10²⁴ molecules CH₃CO₂K
Explanation:
To find the amount of molecules, you need to (1) convert grams to moles (using the molar mass of potassium acetate) and then (2) convert moles to molecules (using Avogadro's Number). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 4 sig figs like the given value (3.645 x 10² = 4 sig figs).
Atomic Mass (C): 12.011 g/mol
Atomic Mass (H): 1.008 g/mol
Atomic Mass (O): 15.999 g/mol
Atomic Mass (K): 39.098 g/mol
Molar Mass (CH₃CO₂K):
2(12.011 g/mol) + 3(1.008 g/mol) + 2(15.999 g/mol) + 39.098 g/mol
= 98.142 g/mol
Avogadro's Number:
6.022 x 10²³ molecules = 1 mole
3.645 x 10² g CH₃CO₂K 1 mole 6.022 x 10²³ molecules
------------------------------------- x ----------------- x ------------------------------------- =
98.142 g 1 mole
= 2.237 x 10²⁴ molecules CH₃CO₂K
You sent
Can you please review the following to ensure that I'm doing this right ?
If I have a medication (powder) that is 1 gram / 100gallons of water and I want to treat a 75gallon aquarium.
1 gram = 1mL
Let's say I take 1 gram and add it to a bottle of 40mL of water. Shake it up and then draw it up with a syringe that is in MLs.
Is this the correct dimensional analysis
40MLs x 1gram/100gallons x 75 gallons = 30 MLs
So then from the solution in the bottle I would draw up 30 mLs and add that to the fish tank?
Is this correct
Using dimensional analysis, the correct conversion is:
40 mL * 1 gram/100 gallons * 75 gallons
Volume of medication required to treat a 75gallon aquarium is 30 mL.
What is dimensional analysis?Dimensional analysis is the process by which different physical quantities are compared and expressed in terms of the dimensions of the fundamental quantities and units of measurement.
In dimensional analysis, calculations performed track the dimensions of the quantities by means of a conversion factor.
Considering the give calculation:
A medication (powder) that is 1 gram / 100gallons of water is to be used to treat a 75gallon aquarium.
1 gram of the medication is added to a bottle of 40mL of water, shaken and then drawn up with a syringe that is in mL.
Therefore, 40 mL of the solution contains 1 g of the medication.
The correct dimensional analysis for volume of medication required is given below:
40 mL * 1 gram/100 gallons * 75 gallons = 30 mL
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3) Do you agree that James Watson should have been stripped of his honors over views regarding race? Why or why not?
The statement of Dr. Watson has no empirical basis. It was a personal opinion hence he ought to be stripped of his honors over views regarding race.
What was Watson's view on race?Dr. James Watson was involved in the discovery of DNA. He was an expert and lead researcher at the New York laboratory. The Nobel price as awarded to him in conjunction with two other scientist in 1962 for the discovery of the molecular structure of DNA.
Dr. Watson expressed his views once when he said that Racial equality is not an empirical fact and did not corroborate such with an empirical back up. He merely asked those that don't believe to ask those who deal with black employees.
Because of this, his position at the New York Laboratory was revoked as well as a revocation of his honorary titles. This action of stripping him of is honorary titles is correct because of the possibility of his statement to engender bios and discrimination against people of minority races.
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Calculate number of atoms present in
96g of Mg element?
Number of atoms present in 9.6g of Mg element is 24.08 × 10^23
An atom is a unit of matter that specifically characterises a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.Atoms are the basic building blocks of matter. Anything that takes up space and anything with mass is made up of atoms.Simple measurement, the mole. It is actually one of the seven foundation units in the International System of Units (SI).The proportionality factor that connects the quantity of substance in a sample to the number of constituent particles in that sample is called the Avogadro constant.Given,
given mass of magnesium is 96g
molar mass of magnesium 24 g/mol
First we will find out number of moles in 96g of magnesium.
Number of moles = given mass / molar mass
= 96 / 24 = 4
To find number of atoms we will multiply no of moles to avagadro number
number of atoms = 4 × 6.02 × 10^23
= 24.08 × 10^23
Hence number of atoms in 96 g of magnesium are 24.08 × 10^23
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the specific gravity of aerogel is only 0.00325. A standard pick up truck holds a volume of about 48.0ft ^3. determine the number of these trucks that would be required to transport 1.00 ton.
The number of trucks is 205 trucks
What is the specific gravity?The specific gravity refers to the ratio of the density of an object to the density of water. This implies that the density of the object is 0.00325 g/cm^3.
Now;
Density = mass/volume
volume of the object = 48.0ft ^3 or 1.359 * 10^6 cm^3
Thus we can obtain the mass of the object from;
mass = density * volume = 0.00325 g/cm^3 * 1.359 * 10^6 cm^3
= 4417 g
We have to convert 1 ton to gram and have 907185 g
The number of trucks that we need to transport this quantity is;
907185 g/4417 g = 205 trucks
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Select the correct answer.
The given compatibility chart shows how different chemicals react with one another. In addition to heat generation, what chemical interaction consequence will likely occur between sulfuric acid and tetrazine?
No. Chemical Name
10 ammonium hydroxide
1 boric acid
16 benzene
6 butyramide
7 dimethyl amine
5 formaldehyde
3 formic acid
4 methanol
16 methyl ethyl ketone
7 pentylamine
10 sodium hydroxide
2 sulfuric acid
8 tetrazine
12 thiram
A.
violent polymerization
B.
innocuous and non-flammable gas generation
C.
toxic gas formation
D.
fire
The consequence of the reaction between sulfuric acid and tetrazine is fire. Option D
How does sulfuric acid react with tetrazine?The compound tetrazine is a basic compound that is composed of four atoms of hydrogen and two atoms of carbon. The formula of the compound is [tex]C_{2} H_{2}N_{4}[/tex] . The compound is a six membered ring that could react with acids and become decomposed. In all cases of the decomposition of the tartazine the reaction is a violent one that leads to the evolution of flames.
In this case, we have been told that there is a reaction between sulfuric acid and tetrazine. This is a very violent reaction that would result in the charring of the substrate.
Thus, when there is a chemical interaction between sulfuric acid and tetrazine, the result is fire.
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A flask with a volume of 125.0 mL contains air with a density of 1.228 g/L. What is the mass of the air contained in the flask?
mass:
0.1535g is the mass of the air contained in the flask.
A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. Mass divided by volume is the formula for density in mathematics: ρ = M/V. where m is the mass, V is the volume, and ρ is the density.
The given are:
1. Mass = ?
2. Density = 1.228 g/L
3. Volume = 125mL to L
Plugging in the values we get,
ρ = M/V
1.228 = M/ 0.125
M = 0.1535g
Therefore, 0.1535g is the mass of the air contained in the flask.
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How many butts are contained in a cubic volume 1.5000 chains on a side?
Answer:
1, I'm not sure but I hope it helps God Bless
An empty flask has a mass of 93.625g. The same flask with a 10.00 mL sample of water in it has a mass of 103.619g. Find the mass of the water in the flask
The mass of water in flask is 9.994g, where an empty flask has a mass of 93.625g containing 10.00ml sample of water in it with a mass of 103.619g.
In analytical chemistry, for preparation of a solution with exact concentration precise determination of mass or volume is required. We can determined mass precisely by using a Sartorius balance and volume by volumetric flask, burette, or pipette.
Given,
Mass of empty flask = 93.635g
Mass of the flask filled with water = 103.619g
Mass of the water in the flask =?
Therefore,
The mass of water(M) in the flask is -
M = (Mass of the flask filled with water) - ( Mass of the empty flask)
= (103.619g) - (93.625g)
= 9.994g
Hence,
The mass of water in the flask is 9.994g
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How many protons, neutrons, and electrons are there in a neutral atom of 240 Am (americium- 240 )?
Answer:
120 protons, 120 neutrons, 120 electrons
Explanation:
The number written next to element (americium - 240) is the mass number. The mass number consists of all the protons and neutrons within an atom of a particular element. Assuming that this atom is not an isotope (atoms of the same element with different number of neutrons), there should be an equal amount of protons and neutrons.
Therefore, if the mass number is 240, there should be 120 protons and 120 neutrons in the atom (240 / 2 = 120).
In neutral atoms, there is an equal amount of positively charged protons and negatively charged electrons. As such, if there are 120 protons, there should be 120 electrons.
