The reaction type which gives one product is a combination reaction.
What is a combination reaction?
Combination reactions are those in which two or more chemical entities join together to form a single product.
Generally, all the other types mentioned in the question can give single products under different circumstances but a combination reaction always gives a single product as shown in the above reaction.
4Fe + 3O2 = 2Fe2O3
Hence, the answer is a combination reaction.
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How can you find the number of particles in a salt packet of known mass?Place the tiles to complete the equation to convert from grams to particles. Refer to the mole road map to determine the correct conversion factors. Use the space below to take notes or make calculations if needed.
First, you need to transform grams of NaCl into moles of NaCl. For this, you will divide by its molar mass. If you divide a fraction, If you divide a fraction, it is inverted and multiplied. So first you have:
0.75 g NaCl x 1 mol NaCl / 58.4 g/mol NaCl = 1.28 x 10^-2 moles
Now you need to use the avogrado's constant to find the number of particles. The avogrado's constant value is 6.02x10^23 mol^-1.
So you have:
0.75 g NaCl x 1 mol NaCl / 58.4 g/mol NaCl x 6.02 x 10^23 particles NaCl / 1 mol NaCl = 7.73 x 10^21 particles of NaCl
Please help solve :)
Answer:
3. 175000 ml
5. 622 cl
7. 1570 ml
9. 440000 l
11. 327 kl
13. 204 kl
15. 8.943 cl
17. 696 kl
19. 287.000046 kl
23. 641 kl
25. 436000 l
Unfortunately, i couldn't read any other problems, only 3 through 25 (with 21 not being a problem)
Explanation:
The conversion units are:
1 ml = 1 ml
10 ml = 1 cl
100 ml = 1 dl (dl meaning deciliter)
1000 ml = 1 l
1 l = 1 l
10 l = 1 decaliter
100 l = 1 hl (hectoliter)
1000 l = 1 kl
For example, if i had 123 l and i wanted to convert it into ml. since 1 l equals 1000 ml, and 2 l equals two times 1000 ml would be 2000 ml, 123 l would equal 123 times 1000 ml which would be 123000 ml.
Sodium azide, NaN3, decomposes according to the following equation and produces N2 gas that inflates the SRS airbag when a car is involved in a serious collision. 2NaN3(s) 2Na(s) + 3N2(g) How many grams of sodium azide (molar mass=65.02 g/mol) is needed to inflate a 45.0-L airbag at 25C and a pressure of 809 torr? (Assume that the decomposition produces 100% yield.)
INFORMATION:
We know that:
- Sodium azide, NaN3, decomposes according to the following equation 2NaN3(s) → 2Na(s) + 3N2(g)
- We have an 45.0L airbag at 25°C and a pressure of 809 torr
And we must find how many grams of sodium azide are needed to inflate the airbag
STEP BY STEP EXPLANATION:
To find it, we need to use the Ideal Gas Law formula PV = nRT
Where,
P = pressure
V = volume
n = number of moles
T = temperature
R = gas constant
Is given that;
P = 809 torr
V = 45.0L
n = we need to calculate it
T = 25°C, converting to K, 25 °C + 273.15 = 298.15 K
R = 62.36 (L*torr)/(mol*K)
Now, replacing in the formula,
[tex]809\text{ torr}\cdot45\text{ L}=n\cdot62.36\frac{L\cdot torr}{mol\cdot K}\cdot298.15K[/tex]Now, solving for n
[tex]n=\frac{809torr\cdot45L}{62.36\frac{L\cdot torr}{mol\cdot K}\cdot298.15K}=1.9580mol[/tex]Now, using that molar mass of NaN3 = 65.02 g/mol, we can calculate the grams
[tex]1.9580mol\cdot65.02\frac{g}{mol}=127.3092g[/tex]Then, 127.3092 g are needed to inflate the airbag.
ANSWER:
127.3092 grams are needed to inflate the airbag.
How many moles of CO2 are present in 118.6grams?
ANSWER
The number of moles of CO2 is 2.69 moles
EXPLANATION
Given that;
The mass of CO2 is 118.6 grams
Follow the steps below
[tex]\text{ mole = }\frac{\text{ mass}}{\text{ molar mass}}[/tex]The molar mass of CO2 is 44.01 g/mol
[tex]\begin{gathered} \text{ mole = }\frac{\text{ 118.6}}{\text{ 44.01}} \\ \text{ mole = 2.69 moles} \end{gathered}[/tex]Therefore, the number of moles of CO2 is 2.69 moles
If shallow infiltration is 25% and deep is 25% and runoff is 10% so it’s 40% evaporation in vegetation surface? How to explain that answer?
Both superficial and deep infiltration of water into the soil are possible. The soil receives the moisture it needs from shallow penetration to maintain the plants and trees mentioned above. Additionally, shallow infiltration may penetrate the soil and enter lakes and rivers further downstream.
After precipitation, water can enter the water cycle through two different processes: runoff and infiltration. Infiltration is water that seeps into the soil, whereas runoff is water that flows across the land's surface. Large amounts of water are moved via runoff across the Earth's surface, finally ending up in lakes and oceans.
The process of evaporation turns liquid water into gaseous water (water vapor). Evaporation is how water gets from the surface of the Earth to the atmosphere. Evaporation results from the dissolution of the bonds holding the water molecules together as a result of heat energy.
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Consider the chemical reaction that takes place between aqueous iron(III)
nitrate and aqueous sodium hydroxide.
Complete the balanced molecular chemical equation for the reaction below.
If no reaction occurs, write NR after the reaction arrow. Be sure to include
the proper phases for all species within the reaction.
Fe(NO3)³(aq) + NaOH(ag) →|
Answer:
[tex]Fe(NO_3)_3 (aq) + 3 NaOH (aq) = > Fe(OH)_3 (s) + 3NaNO_3 (aq)[/tex]
The oxidation state of the iron does not change and this is a double displacement reaction. Fe(OH)3 may decompose further into some oxyhydroxides but the equation provided is probably what the questioner is asking for
Which of the following correctly explains why an object floats on water?(1 point)
Responses
An object that has less mass in the same amount of volume, is supported by the water underneath it.
An object that has less mass in the same amount of volume, is supported by the water underneath it.
An object that has less volume in the same amount of mass, is supported by the water underneath.
An object that has less volume in the same amount of mass, is supported by the water underneath.
An object that has less tightly packed atoms than water is not supported by the water underneath it.
An object that has less tightly packed atoms than water is not supported by the water underneath it.
An object that has more tightly packed atoms than water is supported by the water underneath it.
How many atoms of each element are present in CH4?
In Methane, we have 1 carbon atom combining with 4 hydrogen atoms.
It can also be said as
1 mole C + 4 mole of H = CH₄
These atoms combine together to give us 1 mole of CH₄
In the question given, we have 1 mole of carbon and 4 moles of hydrogen.
However, the equation for the formation of CH₄ is quite different as it is formed by hydrogenation of ethyne or ethene.
[tex]\begin{gathered} C_2H_2+3H_2\rightarrow2CH_4 \\ C_2H_4+2H_2\rightarrow2CH_4 \end{gathered}[/tex]The above equation are some of the known ways to which methane is formed.
From the explanation above, we have 1 atom of C and 4 atoms of H
the sentence or answer the question.
1. What kinds of particles were emitted by the radioactive source? What was there charge?
HELP PLEASE RIGHT ANSWERS ONLY. A legend is a traditional story that explains something in real life. Sometimes they are accepted as true, but sometimes they are fantastical and just plain fun. There are many legends that surround the North Star explaining its creation as well as why it is stationary.
Take some time to research some of the legends of the North Star. After you have had a chance to read several of them, create your own fantastical story of the North Star. It can be how it came to be or explain why it is stationary.
The North star is stationary because it helped as a reference point in describing the location of a place in Bethlehem.
What is a Star?This is a celestial body which is characterized by the presence of gases which are mostly hydrogen and helium and are held together by its own gravity.
The origin of the North star was in the creation of the stars by God in which a small dot was left. This resulted in the dot wanting to be like other stars. The wish was the later granted and it was the Star of Bethlehem which was stationary and helped in the precise location of the place.
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What is a scanning tunneling microscope?An instrument used to view cells and bacteria.An instrument used to view viruses.An instrument used for imaging surfaces at the atomic level.An instrument used to view quarks.
Explanation:
A scanning tunneling microscope is a type of microscope widely used both in industrial and fundamental research to obtain atomic scaled images. It is basically used for imagaing surfaces at the atomic level.
Answer:
The third option is correct.
What is the identity of a 10.0 g metal sample that increases by 14.0 C when 62.9 J of energy is absorbed?
(The answer is Iron but I can't for the life of me remember how to correctly work the problem to get to that answer and am mainly seeking help with that)
Au: 0.128
Ag: 0.235
Cu: 0.385
Fe: 0.449
Al: 0.903
Specific heat capacity of metal is the amount of heat that is required to raise the temperature of metal by 1 degree Celsius. The metals which has specific heat capacity of 0.449J/K/g is Iron. Thus correct option is option C
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
Enthalpy=mass of metal ×specific heat capacity of metal ×Change in temperature.
mass of metal= 10.0 g
change in temperature= 14.0° C =14K
specific heat capacity of metal=?
Q= enthalpy= 62.9 J
Substituting all the given values
specific heat capacity of metal= 62.9 J÷( 10.0 g × 14.0 K )
= 0.449J/K/g
Therefore the metals which has specific heat capacity of 0.449J/K/g is Iron. Thus correct option is option C
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What is the main job of Excretory system?
Answer:
It's function is to remove wastes from the body
Explanation:
These wastes include water, carbon dioxide, nitrogen, salts, and heat. Metabolism: The process of the body converting food into energy. As a result, there are waste products.
distinguish between kinetic energy and potential energy
Potential energy is stored energy in an object. Potential energy is the product of mass of an object, acceleration due to gravity and height of an object where it is placed.
Potential energy = mgh
m = mass of an object
g = acceleration due to gravity
h = height of an object
The S.I. unit of potential energy is joule and is represented by J.
Kinetic energy is energy of an object due to its movement. Kinetic energy is the product of mass of an object and velocity of an object shown by :-
Kinetic energy = 1/2 mv²
m = mass of an object
v = velocity of an object
The S.I. unit of kinetic energy is joule and is represented by J.
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QUESTION 1
How many bonding electrons are in the Lewis structure of N 2?
Answer:
6
Explanation:
3. What does this model show?
AA single type of atom bonded together
B An element because all the particles are the same
CA molecule because there is more than one type of atom
DAn element because there is more than one type of atom
HINT, HINT
Think about the definitio
atom, element, and mc
what these types of m
Answer:
A compound is a distinct group of atoms held together by chemical bonds. ... As we will now see, there are a variety of different ways to represent and draw
Explanation:
Methanol has a density of 0.792 g/mL. What is the volume of 0.5 moles of methanol?
Density=0.792g/ml
Volume=?
We know, Density = Mass/volume
Moles=0.5
To calculate mass, no of moles = given mass/ molar mass
Molar mass of methanol= 32
On calculating, given mass= 0.5*32 = 16g
Volume of methanol = Mass/Density
=16/0.792
=20.202 ml
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What will happen if ammonia is added to a mixture of Ag+, Fe3+ and Co2+?
describe the subsequent steps that couls be preformed to separate the three cations?
Ag⁺, Fe³⁺, and Co²⁺ react with ammonia to generate the complex ion when ammonia is added to the mixture.
The following actions could be taken in order to separate the three cations:
Precipitation of the silver ion as the insoluble silver chloride salt is the initial stage in the separation of these three cations. The addition of hydrochloric acid is all that is necessary to produce this precipitate.
Ag⁺ (aq) + HCl (aq) ⇄ AgCl (s, white) + H⁺ (aq) .... (eq. 1)
By centrifuging the test tube and separating the supernatant, the silver can then be distinguished from the other two cations because neither iron (III) nor cobalt (II) can produce an insoluble chloride salt. The precipitate that is still in the test tube is next tested to determine if there is silver present. The silver (I) complex dissolves after the addition of ammonia first.
AgCl (s) + 2 NH₃ (aq) ⇄ Ag(NH₃)₂⁺ (aq) + Cl⁻ (aq) ........(eq. 2)
Nitric acid will cause the ammonia, NH₃, to react with the acid, shifting the balance to the left and causing the silver ion to re-precipitate as silver chloride.
Fe³⁺ and Co2+ are both present in the supernatant that was previously decanted. The iron (III) ion forms an insoluble hydroxide and precipitates out of the solution when ammonia is added to the mixture.
Fe³⁺ (aq) + 3 NH₃ (aq) + 3 H₂O (l) ⇄ Fe(OH)₃ (s) + 3 NH₄ ⁺ (aq) ........(eq. 3)
Fe(OH)₃ is left as a solid after centrifugation and decantation, and it can be dissolved with hot hydrochloric acid. You will carry out each of the two iron (III) confirmation tests. If Fe³⁺ is present in the first, adding potassium thiocyanate solution results in a red-brown color.
Fe³⁺(aq) + SCN⁻ (aq) ⇄ Fe(SCN)₂⁺ (aq, red-brown) ........(eq. 4)
In the second test, potassium ferrocyanide, K₄[Fe(CN)₆] solution is added after adding ammonia until the solution is only marginally acidic. Prussian blue is a dye that is a solid dark blue color when iron (III) is present.
4 Fe³⁺ (aq) + 3 K₄[Fe(CN)₆] (aq) ⇄ Fe₄[Fe(CN)₆]₃ (s, blue) + 12 K⁺ .......(eq. 5)
Some blue inks contain this chemical suspended in a solution.
A straightforward test can establish the cobalt ion's existence in the decanted supernatant solution. Hydrochloric acid is added to the basic solution to make it significantly more acidic. When potassium nitrite, KNO₂, is added, potassium hexanitritocobaltate, an insoluble yellow chemical, is created (III).
Co²⁺ (aq) + 7 NO₂⁻(aq) + 3 K⁺ (aq) + 2 H⁺ (aq) → NO (g) + H₂O (l) + K3[Co(NO2)6] (s, yellow) ........(eq. 6)
Nitric oxide, or NO, a colorless gas, is created via the reaction in Eq. 6. Nitrogen dioxide, also known as NO₂, is created when nitric oxide and oxygen in the air react. NO₂ can be seen as a red-brown gas.
2 NO (g, colorless) + O₂ (g) → 2 NO₂ (g, red-brown) ........(eq. 7)
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The American Heart Association recommends to eat no more than 2,301mg of sodium per day. Convert the mass of
sodium to ounces, if 1 oz = 28.3459g. Use correct significant figures. 2301mg x (0.001g / 1 mg) x (1 oz/ 28.3459g) =
The mass of 2,301 grams of sodium in ounces is 0.0811757609 ounces.
The amount of sodium recommended by American heart association is 2301 mg. This limit should not be crossed in a day.
We have to convert Mass of sodium from mg to ounces.
We know,
1 ounce = 28.3459 grams.
We also know,
1 gram = 1000 milligrams.
So,
28.3459 grams = 28.3459 x 1000 milligrams.
28.3459 grams = 28345.9 milligrams.
1 ounce = 28345.9 mg.
1 mg = 1/28345.9 ounces
Weight of sodium 2301mg in ounces,
2301mg = 2301/28345.9 ounces
Dividing till last significant figure,
2301 mg = 0.0811757609 ounces.
Mass of sodium in ounces is 0.0811757609.
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iven the following reactions,
Fe2O3 (s) + 3CO (s) 2Fe (s) + 3CO2 (g) H = -28.0 kJ
3Fe (s) + 4CO2 (s) 4CO (g) + Fe3O4 (s) H = +12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO (below) is _____________ kJ.
3Fe2O3 (s) + CO (g) CO2 (g) + 2Fe3O4 (s)
Enthalpy of reaction when CO(s) reacts with Fe₂O₃(s) is +15.5KJ.
First let us write all the reactions,
Fe₂O₃(s) + 3CO(s) → 2Fe(s) + 3CO₂(g); ΔH₁ = -28.0 kJ, Equation 1,
3Fe(s) + 4CO₂(s) → 4CO(g) + Fe₃O₄(s) ; ΔH₂ = +12.5 kJ, Equation 2,
Enthalpy of reaction of CO(s) and Fe₃O₄(s) can be found by,
Adding the two given equation,
Fe₂O₃(s) + 3CO(s) + 3Fe(s) + 4CO₂(s) → 2Fe(s) + 3CO₂(g) + 4CO(g) + Fe₃O₄(s)
Further solving,
Fe₂O₃(s) + Fe(s) + CO₂(s) → CO(s) + Fe₃O₄(s); ΔH = ΔH₁+ΔH₂
Now, reversing the equation,
CO(s) + Fe₃O₄(s) → Fe₂O₃(s) + Fe(s) + CO₂(s); ΔH = -(ΔH₁+ΔH₂)
On reversing a reaction the sign of the Enthalpy changes,
So, the enthalpy,
ΔH = -(ΔH₁+ΔH₂)
ΔH = -(-28+12.5)KJ
ΔH = 15.5 KJ.
Hence the enthalpy of reaction is 15.5KJ.
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the number of mole of iron produced from 0.216 mole of aluminum is:
3 FeO (l) + 2 Al (l) → 3 Fe (l) + 1 Al2O3
For the reaction CH4 + 202-> CO₂ + 2H₂O, how many moles of water are produced alongside 100g of carbon dioxide.
ANSWER
The number of moles of water produced is 4.54 moles
EXPLANATION
Given that:
[tex]\text{ CH}_4\text{ }+2O_2\text{ }\rightarrow\text{ CO}_2\text{ }+\text{ 2H}_2O[/tex]The mass of carbon dioxide is 100g
To find the moles of water, follow the steps below
Step 1: Calculate the moles of carbon dioxide using the formula below
[tex]\text{ Mole }=\text{ }\frac{\text{ mass}}{molar\text{ mass}}[/tex]Recall, that the molar mass of CO2 is 44.01 g/ mol
Step 2: Substitute the given data into the formula in step 1
[tex]\begin{gathered} \text{ mole }=\text{ }\frac{100}{44.01} \\ \text{ mole }=2.272\text{ moles} \end{gathered}[/tex]Step 3: Find the moles of water produced using a stoichiometry ratio
In the reaction above, 1 mole of CO2 is equivalent to 2 moles of H2O
Let x represent the number of moles of water
[tex]\begin{gathered} \text{ 1 mole CO}_2\text{ }\rightarrow\text{ 2 moles H}_2O \\ \text{ 2.272 moles CO}_2\text{ }\rightarrow\text{ x moles H}_2O \\ \text{ Cross multiply} \\ \text{ 1 mole CO}_2\text{ }\times\text{ x moles H}_2O\text{ }=\text{ 2 moles H}_2O\times2.272\text{ moles CO}_2 \\ \text{ Isolate x} \\ \text{ x }=\frac{2\text{ moles H}_2O\times2.272\cancel{molesCO_2}}{1\cancel{moleCO_2}} \\ \text{ x }=\text{ 2 }\times\text{ 2.272} \\ \text{ x }=\text{ 4.54 moles} \end{gathered}[/tex]Therefore, the number of moles of water produced is 4.54 moles
aining Time: 1 hour, 34 minutes, 56 seconds.tion Completion Status:QUESTION 81. How many moles of Cl atoms are in 4.32 moles of CC14? Show your set up and work- the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).vParagraphBIUSOpen Sans,sa... v10pt:E V>
17.28 moles of Cl atoms are present in 4.32 moles of CC14.
we have given data in the statement
4 Cl atoms in CC14.
then moles of Cl in CC14 = 4.32×4 = 17.28 moles
The mole idea is a useful way to indicate how much of a substance there is. Even one gram of a pure element is known to have an enormous number of atoms when working with particles at the atomic (or molecular) level. The mole idea is frequently applied in this situation. The unit of measurement that receives the most attention is the "mole," which is a count of a sizable number of particles.
Popularly known as the Avogadro constant, the quantity 6.02214076*10^23 is frequently represented by the letter "NA". Atoms, molecules, monoatomic and polyatomic ions, as well as other particles, are examples of the elementary entities that can be represented in moles (such as electrons).
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PLSSS HELP WILL RATE 5-STAR AND GIVE A THANKS PLUS MAYBE... BRAINLIEST!!! PLSS!!!
Answer 2:
Rotation of the Earth: When the earth rotates on its own axis, not moving around its orbit but rotating on its tilted axis (23°). That motion is known as rotation.Revolution of the Earth: When the earth revolves in its orbit around the sun along with rotation which is being done on its own axis as well.Therefore, Earth is in two types of motion-
rotating on its own axis.revolving around the sun with its particular orbit.Answer 3:
In rotation, it takes 24 hours or a day to complete one rotation on its axis.In revolution, Earth takes 365 days 6 hours, and 9 minutes exactly, or say one year to complete one revolution around the sun.Answer 4:
Changes in the day and night occur due to the rotation of the earth. It also impacts ocean and air currents.Revolution causes changes in the weather and climate across the globe. Our seasons come and go periodically because of the revolution of the earth.Answer 5:
If the earth's rotation decrease by half of its original speed then, It will take 48 hours to complete one rotation as earlier it was taking 24 hours with the original speed. If speed is decreased to half, time doubles.The number of daylight changes from 12 hours to 24 hours.The number of darkness changes from 12 hours to 24 hours as earlier it was taking 12 hours each ( day and night).It will change our whole daily routine as the number of days and nights increases. The number of sleeping time, as well as working time, will increase respectively.It will take to make our habits according to the number of days and nights, however, they both will be equal, and therefore, it will have the same effect as before.To know more about the revolution's effects, find the below link:
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Aluminum has a density of 2.70 g/mL. What is the volume of 546 g of Al?
Answer:
222.2cm^2?
Explanation:
cos volume equals mass divided by density
26.What is the usual oxidation number of the lithium ion?Select one:a. -2b. -1c. +1d. +2
ANSWER
The usual oxidation state of lithium is +1
EXPLANATION
Lithium is a group 1 metal with an atomic number of 3. Its electronic configuration of lithium atom is written below as
[tex]\text{ }_3\text{Li }\rightarrow\text{ 1s}^22s^1[/tex]In the above configuration, lithium has one electron in its outermost shell. Hence, the valence of electron is 1
During chemical reaction, lithium will lose an electron to attain it octet structure and it will attain the electronic configuration of Helium
Since it will be losing one electron, therefore it usual oxidation number is +1u
Balance the following by the method of half reactions:
S2O32- + H2O + Cl2 --> SO42- + Cl- + H+
What are the total number of electrons transferred in the balanced half reactions?
From the method of half-reactions, the balanced equation of the reaction is given below:
S₂O₃²⁻ (aq) + H₂O (l) + 4 Cl₂ (g) ---> 2 SO₄²⁻ (aq) + 2 H⁺ (aq) + 8 Cl⁻ (aq)Eight electrons were transferred.
What are half-reactions?Half reactions are reactions that show the processes of oxidation and reductions that occur in a redox reaction as separate or individual reactions.
The half-reactions of the given equation are as shown below:
Oxidation:
Unbalanced - S₂O₃²⁻ (aq) + H₂O (l) ---> SO₄²⁻ (aq) + H⁺ (aq)
Balanced - S₂O₃²⁻ (aq) + H₂O (l) ---> 2 SO₄²⁻ (aq) + 8 e⁻ + 2 H⁺ (aq)
Reduction:
Unbalanced - Cl₂ ---> Cl⁻
Balanced - 4 Cl₂ (g) + 8 e⁻ ---> 8 Cl⁻ (aq)
Overall balanced equation: S₂O₃²⁻ (aq) + H₂O (l) + 4 Cl₂ (g) ---> 2 SO₄²⁻ (aq) + 2 H⁺ (aq) + 8 Cl⁻ (aq)
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A sample of gas has an initial volume of 8.90 L at a pressure of 825 mmHg. If the volume of the gas is increased to 14.7 L, what is its pressure (in atm)?
A sample of gas has an initial volume of 8.90 L at a pressure of 825 mmHg. If the volume of the gas is increased to 14.7 L, what is its pressure (in atm) is 0.65 atm.
According to boyle's law , we have
P1 V1 = P2 V2
P2 = (P1 V1 ) / V2
given that :
initial volume V1 = 8.90 L
pressure P1 = 825 mmHg = 1.08 atm
volume V2 = 14.7 L
solving the values in the formula , we get
P2 = (P1 V1 ) / V2
P2 = ( 1.08 × 8.90 ) / 14.7
P2 = 9.612 / 14.7
P2 = 0.65 atm
Thus, A sample of gas has an initial volume of 8.90 L at a pressure of 825 mmHg. If the volume of the gas is increased to 14.7 L, its pressure in atm is 0.65 atm.
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A piece of metal has a mass of 32.4g and has a volume of 24.9cm³. What is its
density?
A piece of metal has a mass of 32.4g and has a volume of 24.9cm³, then its density is 1.301 g/cm³
What is density?Density is defined as mass of a material substance per unit of the volume. The equation for density is d = M/V, where d stands for density, M for mass, and V for volume.
Grams per cubic centimeter are a common unit of density measurement. For instance, the density of Earth is 5.51 grams per cubic centimeter, whereas the density of water is 1 gram per cubic centimeter.
Density measures how tightly a mass of matter is packed. The density of a mass depends on how tightly it is packed in relation to the volume that it takes up. A low density substance, on the other hand, has a lower mass to volume ratio.
The amount of a substance present when its density is being measured ought not to have an impact on its density, in theory. The ratio of mass to volume should be constant regardless of the size of the sample being tested.
The formula of density is
[tex]\rho ={\frac {m}{V}}[/tex]
Where,
[tex]\rho[/tex] = density
m = mass
V = volume
We have given
m = 32.4g
V = 24.9cm³
[tex]\rho[/tex] = 32.4g/24.9cm³
[tex]\rho[/tex] = 1.301 g/cm³
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Calculating the average atomic mass from Isotope data
The relative atomic masses of the given elements are as follows:
Lead = 206.96 amuMagnesium = 24.62 amuSilicon = 28.08 amuWhat is relative atomic mass?Relative atomic mass is the sum of the product of the isotopic masses and the relative abundance of the isotopes of an element.
Relative atomic masses are averages.
The relative atomic masses of the given elements are calculated as follows:
1. Lead:
Relative atomic mass = (203.973 * 0.014) + (205.974 * 0.236) + (206.759 * 0.226) + (207.9766 * 0.523)
Relative atomic mass = 206.96 amu
2. Magnesium:
Relative atomic mass = (23.985 * 79.99) + (24.986 * 10%) + (25.983 * 11.01%)
Relative atomic mass = 24.62 amu
3. Silicon:
Relative atomic mass = (27.977 * 92.21%) + (28.976 * 4.70%) + (29.973 * 3.09%)
Relative atomic mass = 28.08 amu
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