Diamond and graphite are allotropes of carbon and have various differences in their physical properties.
Explanation:
Diamond:
It is crystalline in natureEach Each C is [tex]sp^{3}[/tex] hybridized and forms 4 covalent binds with neighboring C atomsThe geometry is tetrahedralC-C bond length is 154 pmIt has rigid covalent boning which is difficult to break.It acts as an electric insulatorGraphite:
It has layered structureEach C atom is sp2 hybridized and forms 3 sigma bonds with 3 other C atoms. Fourth electron forms pi bond. The geometry is planarC-C bond length is 141.5 pmIt is soft. Its layers can be separated easilyIt is good conductor of electricity.This is the comparison of the physical properties of two forms of carbon: diamond and graphite
Carbon and Diamond are allotropes of carbon having different physical properties.
What are the physical properties of Carbon and Diamond?Diamond is vary hard whereas graphite is soft;In diamond there is a three dimensional network of strong covalent bonds. This makes diamond extremely hard.
On the other hand, in graphite there are flat layers of carbon atoms. These layers are held by weak van der Waal’s forces and hence can easily slip one over the other. This makes graphite extremely soft and slippery.
Diamond is bad conductor of electricity whereas graphite is a good conductor:In diamond all the four valence electrons carbon are involved in covalent bonds and are not free to conduct electricity. This makes diamond a bad conductor of electricity. In graphite, the fourth valence electron is relatively free, can move from one carbon atom to the other in a layer, and hence is responsible for conducting electricity. Hence, graphite is a good conductor of electricity.
Melting points of graphite and diamond are very high:In diamond as well as in graphite carbon atoms are held by strong net work of covalent bonds. Therefore, both have very high melting points.
Therefore, we can compare the physical properties of carbon and diamond.
Learn more about Physical Properties of Carbon and Diamond, here:
https://brainly.com/question/171380
#SPJ3
Make a circle graph for each set of data. Top 5 Most Linked-To Sites on the World Wide Web Site Hits (millions) America Online (www.aol.com) 93.0 Microsoft (www.msn.com) 83.8 Yahoo! (www.yahoo.com) 80.2 Terra Lycos (www.lycos.com) 40.3 About (www.about.com) 36.6 Source: Scholastic Kid’s Almanac, 2001 a. A circle graph. America Online is about 25 percent; Microsoft, 25 percent; Yahoo 23 percent; Terra Lycos, 15 percent; About, 10 percent. c. A circle graph. America Online is about 27 percent; Microsoft, 27 percent; Yahoo 22 percent; Terra Lycos, 12 percent; About, 10 percent. b. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 27 percent; Terra Lycos, 17 percent; About, 23 percent. d. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 25 percent; Terra Lycos, 25 percent; About, 20 percent. Please select the best answer from the choices provided A B C D
Answer:
A
Explanation:
Calculate the answers to the appropriate number of significant numbers
32.567
135.0
+ 1.4567
—————
Answer:
32.567+135.0+1.4567=169.027
to significant figures is 16
If a solid has a density of 4.0 g/cm^3, what volume of the solid has a mass
of 24 g? Show work.
Answer:
Volume = 6 cm³Explanation:
Density of a substance is given by
[tex]Density = \frac{mass}{volume} [/tex]
From the question
Density = 4.0 g/cm³
mass = 24g
Substitute the values into the above formula and solve for the volume
That's
[tex]4 = \frac{24}{v} \\4v = 24[/tex]
Divide both sides by 4
v = 6
We have the final answer as
Volume = 6 cm³Hope this helps you
What are the limitations of Bronsted-Lowery concept???
Answer:
There is no limitation at all because that is the basic theory of solution electrolysis
[tex]<body bgcolor=fushia><maruee direction="right"><font color=yellow>[/tex]
Limitation of Bronsted Lowey concept:
✭It doesn't describe the acidic and basic nature of organic compound.
✭It also doesn't describe the acidic, basic as well as amphoteric gaseous molecule.
✭According to Bronsted Lowery concept same compound in one reaction act as acid and another reaction act as base so, it is difficult to predict the exact acid or base.
Wk-14
Date
Page
Assignment
1. Calculate the percentage of iron in K3 Fe (CN)
[K= 39, Fe =56, C= 12, N =14]
Answer:
The mass percentage of iron in [tex]\rm K_3[Fe(CN)_6][/tex] (potassium ferricyanide) is approximately [tex]17\%[/tex].
Explanation:
Start by finding the formula mass of potassium ferricyanide, [tex]\rm K_3[Fe(CN)_6][/tex], using relative atomic mass data from the question:
[tex]\begin{aligned} & M(\mathrm{K_3[Fe(CN)_6]}) \\ &\approx 3 \times 39 + 56 + 6 \times (12 + 14) \\ &= \rm 329 \; g \cdot mol^{-1}\end{aligned}[/tex].
In other words, every one mole of [tex]\rm K_3[Fe(CN)_6][/tex] formula units have a mass of approximately [tex]329\; \rm g[/tex].
On the other hand, note that there is one iron [tex]\rm Fe[/tex] atom in every one mole of [tex]\rm K_3[Fe(CN)_6][/tex] formula units. Hence, there would be exactly one mole of iron atoms in every one mole of [tex]\rm K_3[Fe(CN)_6][/tex] formula units. The mass of that one mole of iron atoms is approximately [tex]56\; \rm g[/tex] (again, from the relative atomic mass data of the question.)
Therefore:
[tex]\begin{aligned}& \text{Mass percentage of $\mathrm{Fe}$ in $\mathrm{K_3[Fe(CN)_6]}$} \\ &= \frac{\text{Mass of $\mathrm{Fe}$ in one mole of $\mathrm{K_3[Fe(CN)_6]}$ formula units}}{\text{Mass of one mole of $\mathrm{K_3[Fe(CN)_6]}$ formula units}}\times 100\% \\ &= \frac{M(\mathrm{Fe}) \times (\text{Number of $\mathrm{Fe}$ atoms in each $\mathrm{K_3[Fe(CN)_6]}$ formula unit)}}{M(\mathrm{K_3[Fe(CN)_6]})} \times 100\%\end{aligned}[/tex]
[tex]\begin{aligned}&\approx \frac{1 \times 56\; \rm g \cdot mol^{-1}}{329\; \rm g \cdot mol^{-1}}\end{aligned}[/tex].
A copper cylinder, 12.0 cm in radius, is 44.9 cm long. If the density of copper is 8.90 g/cm^3, calculate the mass in grans of the cylinder. (Assume pi=3.14
Answer:
we use: V = pi*(r^2)*h
V = 3.14*(12.0cm^2)*44.0 cm
V = 19895.04 cm^3
Therefore, mass = (8.90g/cm^3) * (19895.04 cm^3) = 177065.856 g
Explanation:
A copper cylinder, 12.0 cm in radius, is 44.9 cm long. If the density of copper is 8.90 g/cm^3, the mass of the cylinder is 180687.62g
What is density?Density is defined as the degree to which a material is packed together.
It is also defined as the measurement of the relative "heaviness" of objects with a fixed volume.
It is mass per unit volume.
Volume = ∧r²h
Volume = 3.14 x 12² x 44.9
= 20301.98 cm³
Density = mass / volume
So, mass = density x volume
= 8.90 g/cm³ x 20301.98
= 180687.62 g
Thus, a copper cylinder, 12.0 cm in radius, is 44.9 cm long. If the density of copper is 8.90 g/cm^3, the mass of the cylinder is 180687.62g.
To learn more about density, refer to the link below:
https://brainly.com/question/15164682
#SPJ5
there is an ice cream shop 6 blocks north of your hotel. how many minutes will it take to walk there and back
Answer:
This question is incomplete
Explanation:
This question is incomplete.
However, when all the required data are available, you can use the formula/steps below
Average speed/velocity (m/s) = distance (in metres) ÷ time (in seconds)
Time (in secs) = distance ÷ average speed/velocity
Kindly note that "blocks" is not a standard unit for distance measurement in science, hence the distance (since its a walking distance) must be in metres (or converted to metres if not in metres).
The distance in the formula is the distance from the hotel to the ice cream shop while the average speed is the distance covered per time as s/he walks to the ice cream shop and back. Hence, the answer gotten from the formula above will have to be multiplied by 2 (in order to get the time taken to walk to the ice cream shop and back) because the formula will only provide answer to one trip (time taken to walk to the shop).
After the multiplication mentioned above, the time in seconds should be converted to minutes by dividing the answer in seconds by 60
is air a good conductor of electricity
Answer:
No, air is not a good conductor of electricity.
It is poor conductor.
Which model best represents the modifications to
the theory that Thomson's results made
necessary?
Answer:A
Explanation:
can you pls tell me the word equations for all these equations
Answer:
Below
Explanation:
Balanced form;
[tex]2C_6H_6 +15O_2 -> 12CO_2+6H_2O\\\\ Ca_3(PO_4)_2 +8C -> Ca_3P_2 +8CO\\\\2HNO_2+O_2 -> 2HNO_3\\\\Ca(OH)_2 + CO_2 -> CaC0_3+H_2O\\\\2K +Br_2 ->2KBr\\\\2NaOH+FeSO_4 -. Na_2SO_4 +Fe(OH)_2[/tex]
1.Benzene + Dioxygen = Carbon Dioxide + Water
2.Tricalcium phosphate +Carbon = Calcium phosphide + carbon monoxide
3.Nitrous acid react with oxygen to produce nitric acid.
4.This means that the carbon dioxide and limewater react to produce calcium carbonate and water.
5.Potassium react with bromine to produce potassium bromide
6. An aqueous solution of ferrous sulphate reacts with aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in the solution.
what is the mass of 5.3 litres of carbon dioxide gas at STP
Answer:
Explanation:
given volume =5.3 litres
as we know that 1 litre =1 dm3
therefore 5.3 litres =5.3 dm3
now moles =given mass /molar mass
so mass =moles*molar mass
in order to find mass of carbon we need to find moles
therefore moles=given volume/standard volume standard volume at STP is 22.4 dm3
moles= 5.3/22.4
moles=0.236=0.24
now mass of carbon dioxide =moles*molar mass
mass = 0.24*44
mass=10.56kg
What are SL units ?
Answer:
International System of Units
Definition: A system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Hope this helps!
How many sig figs does the answer to the following calculation have?
1.90 + 2.3 +5.700 = ?*
Answer:
The answer is 2 significant figures.
1.90+2.3+5.700=9.9
Which statement accurately describes the universe?
Answer: The universe consists of all the energy made by the Sun and stars. The universe consists of all physical objects on Earth and in space. The universe consists of all matter and energy. The universe consists of solar systems which contain galaxies.
Explanation: That's because the Universe does consists of all the energy made by the Sun and Stars. That is how we get our energy is from the Sun and Stars, and the Solar System contains Galaxies.
A sample of ground beef contains 21.3% protein and 16.9% fat, both by mass. What mass of this ground beef, in grams, contains 350 Calories? Assume all Calories come from protein and fat.
Answer:
147.5 grams
Explanation:
Let the required mass of ground beef be m .
protein in it = .213 m
fat in it = .169 m
1 gram of protein gives 4 cals .
1 gram of fat gives 9 cals .
cals given by .213 m protein = 4 x .213 m .
cals given by .169 m fat = 9 x .169 m .
4 x .213 m + 9 x .169 m = 350
.852 m + 1.521 m = 350
2.373 m = 350
m = 147.5 grams Ans
please help. fill out the blanks
how can a mixture be separated into pure substances
Mixtures can always be separated again into component pure substances, because bonding among the atoms of the constituent substances does not occur in a mixture. Whereas a compound may have very different properties from the elements that compose it, in mixtures the substances keep their individual properties.
Explanation:
Which of the following describes the characteristics of a plasma? (3 points) a Particles are packed closely together, have low compressibility, and usually maintain their organized, set shape. b Particles are positively and negatively charged, have high compressibility, and spread out to fill a container. c Particles move around in a semi-organized way, take the shape of a container, and fill a container from the bottom up. d Particles move freely, have high compressibility, and spread out evenly to fill a container.
Answer:
The correct option is;
b. The particles are positively and negatively charged, have high compressibility, and spread out to fill a container
Explanation:
Plasma are gases that contain positively and negatively charged particles. Therefore, plasma flow drift in space such that plasma. like gases has no characteristic shape or volume but takes the shape and fills the entire volume of a container in which it is placed
Other characteristics of plasma are that plasma is a conductor of electricity and magnetic fields can therefore exist in plasma due to the fact that plasma are made of atoms in which part or all of the electrons have been removed leaving the ions to roam freely in a container.
1. Which of the following metric relationships is INCORRECT?
A) 1 microliter = 10-6 liters
B) 10 decimeters = 1 meter
C) 103 milliliters = 1 liter
D) 1 gram = 102 centigrams
E) 1 gram = 103 kilograms
Metric relationships 103 ml = 1l, 1g = 102 centigrams and 1g = 103 kilograms are incorrect.
What are metrics?Metrics are a system which is based on decimal values and is used to measure the given quantity. It can be used to measure the length, volume, mass, time, speed, distance etc.
What is kilogram?A metric quantity of mass that is equivalent to one thousand grams A mass of one kilogram weighs a little over two pounds.
1 microliter =[tex]10^{-6}[/tex] liters10 decimeters make up 1 meter.1000 milliliters make up 1 liter. 1 gram has 100 centigrams.1 gram has[tex]10^{-3}[/tex] liters.1 kilogram = 1000 gramHence, option C, D and E are the incorrect options.
To learn more about the metrics and kilogram here.
https://brainly.com/question/24248807
#SPJ2
do cfcs break down ozone
Answer:
Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up. So true.
Hope this helps! （づ￣3￣）づ╭❤～
If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change
Answer:
The new volume of the sample is halved.
Explanation:
Data obtained from the question include the following:
Initial volume (V1) = V
Initial temperature (T1) = T
Initial pressure (P1) = P
Final pressure (P2) = quadrupled = 4P
Final temperature (T2) = doubled = 2T
Final volume (V2) =?
Thus, we can obtain the new volume of the same by using the combined gas equation as shown below:
P1V1 /T1 = P2V2 /T2
P × V/T = 4P × V2/2T
Cross multiply
T × 4P × V2 = P × V × 2T
Divide both side by T × 4P
V2 = (P × V × 2T) / (T × 4P)
V2 = V/2
V2 = ½V
Therefore, the new volume of the sample is halved .
In order to survive, plants absorb sunlight, water, and nutrients from the soil. 1. Does this represent a physical or chemical change? 2. Justify why this is this type of change. What property is this?
How many significant figures are in 1.00 L
Answer:
3 significant numbers
A bond in which valence electrons are shared is called covalent. is the process of breaking large molecules into smaller ones by adding water. If energy is released when a molecule is broken apart, it is a(n) reaction. The process of building up large molecules from small components is a(n) process. A lipid with four sites lacking hydrogen saturation is a lipid.
Answer:
A bond in which valence electrons are shared is called COVALENT.
HYDROLYSIS is the process of breaking large molecules into smaller ones by adding water.
If energy is released when a molecule is broken apart, it is an EXERGONIC REACTION.
The process of building up large molecules from small components is an ANABOLIC process.
A lipid with four sites lacking hydrogen saturation is a POLYUNSATURATED lipid.
Which of the following BEST states the Law of Conservation of Matter?
Your answer:
B. The total mass of the reactants in a reaction is double the total mass of the product(s).
C. The total mass of the reactants in a reaction is less than the total mass of the product(s).
D. The total mass of the reactants in a reaction is greater than the total mass of the product(s).
Answer: there is not any correct answer but the law of conservation of matter states that the sum of the mass of the reactants should be equal to that of the product
water has density of 1.0 g/L. What volume of water has mass 250 g?
Answer:
Examine the units: If the density is 1 g/mL, how many mL do you need to make 250 g?
X mL * 1 g/mL = 250 g
Solve for X
x mL = 250 g / 1 g/mL = 250 mL
Hope this helps :)
The volume of water = 250 L
The formula for density:
[tex]density = \frac{mass}{volume}[/tex]
Given, density = 1.0 g/L = 0.001 kg/L
mass = 250 g = 0.25 kg
Putting the values in the equation
[tex]0.001 = \frac{0.25}{volume}[/tex]
[tex]volume = \frac{0.25}{0.001}[/tex]
[tex]volume = 250 L[/tex]
Hence, the volume of the water is 250 L.
Learn more about density here:
https://brainly.com/question/15164682
#SPJ2
Could somebody please help this is really hard
Answer:
The answers to your questions are given below
Explanation:
1. 3 Na2SO4
Molecules of Na2SO4 = 3
Na (sodium) = 3 x 2 = 6
S (sulphur) = 3 x 1 = 3
O (oxygen) = 3 x 4 = 12
2. 4 Pb(NO3)2
Molecules of Pb(NO3)2 = 2
Pb (lead) = 4 x 1 = 4
N (nitrogen) = 4 x 2 x 1 = 8
O (oxygen) = 4 x 3 x 2 = 24
What is 745000 nanometers converted to millimeters?
Answer:
0.745 millimiters
i looked it up on google and this is the right answer
Given: Fe2O3(s) + 3 CO(g) –––––> 2 Fe(s) + 3 CO2(g); ΔH° = –26.8 kJ FeO(s) + CO(g) –––––> Fe(s) + CO2(g); ΔH° = –16.5 kJ determine ΔH° for the following thermochemical equation. Fe2O3(s) + CO(g) –––––> 2 FeO(s) + CO2(g)
Answer:
ΔH° = + 6.2 kJ
Explanation:
Fe₂O₃(s) + 3CO(g) –––––> 2 Fe(s) + 3 CO₂(g); ΔH° = –26.8 kJ ......... ( 1 )
FeO(s) + CO(g) –––––> Fe(s) + CO₂(g); ΔH° = –16.5 kJ .........( 2 )
Multiplying equation ( 2 ) by 2 and subtracting it from ( 1 )
Fe₂O₃(s) + 3CO(g) -2 FeO(s) - 2CO(g) ––> 2 Fe(s) + 3 CO₂(g) - 2Fe(s) - 2CO₂(g) ΔH° = –26.8 kJ - ( 2 x –16.5 kJ )
Fe₂O₃(s) + CO(g) -2 FeO(s)––> CO₂(g) ΔH° = –26.8 kJ + 33 kJ
Fe₂O₃(s) + CO(g) ––>2 FeO(s) +CO₂(g) ΔH° = + 6.2 kJ
Required ΔH° = + 6.2 kJ Ans .
Two Nitrogen atoms bonded together is what? *
O Atom
O Molecule
Help me please