The final temperature of the metal and wa- ter mixture, assuming no heat loss to the surrounding is 23.67 degree Celesius.
So, 5 grams of Aluminum and 10 grams of Iron pellets are heated to 100°C and added to 97.3 grams of water.
Final temperature = ?
All the heat given out by the aluminum and iron is absorbed by the water.
=> Let final Temperature be T.
For Heat Gained by Water:
T1 = 22 °C
T = ?
△T = T-22 °C
m = 0.0973 kg
c = 4200 J kg-1 °C-1
Q = 0.0973 kg * 4200 J kg-1 °C-1 * (T-22) °C
Q1 = 408.66 * (T-22) J
For Heat Lost By Aluminum:
T1 = 100 °C
T = ?
△T = 100-T °C
m = 0.005 kg
c = 890 J kg-1 °C-1
Q = 0.005 kg * 890 J kg-1 °C-1 * (100-T) °C
Q2 = 4.45 * (100-T) J
For Heat Lost By Iron:
T1 = 100 °C
T = ?
△T = 100-T °C
m = 0.01 kg
c = 450 J kg-1 °C-1
Q = 0.01 kg * 450 J kg-1 °C-1 * (100-T) °C
Q3 = 4.5 * (100-T) J
Now,
Q1 = Q2 + Q3
408.66 * (T-22) = 4.45 * (100-T) + 4.5 * (100-T)
408.66T - 8990.52 = 445 - 4.45T + 450 - 4.5T
408.66T - 8990.52 = 895 - 8.95T
408.66T + 8.95T = 895 + 8990.52
417.61 T = 9885.52
T = 9885.52/417.61
T = 23.67 °C
The final temperature of the metal and water mixture, assuming no heat loss to the surrounding is 23.67 degree Celsius.
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during silica gel chromatography, it is normal for: during silica gel chromatography, it is normal for: all compounds to elute at identical rates, regardless of polarity less polar compounds to elute more slowly than more polar compounds more polar compounds to elute more slowly than less polar compounds
During silica gel chromatography, it is normal for: more polar compounds more polar compounds to elute more slowly than less polar compounds
It is a method in which a liquid serves as the mobile phase while the stationary phase is made up of solid adsorbents like silica gel and activated alumina powder. The adsorbents' activity and the solvent's polarity affect the active compound separation principle. A good separation of the compound occurs when the solvent's polarity is very low and the adsorbent's activity is strong and high. The outcomes of compound separation, on the other hand, are poor if the solvent's polarity is very strong and the activity of the adsorbents is high. It implies that chemical isolation and purification are not entirely pure.
The method of column chromatography is the most well-known and widely used method for separating complex mixtures that are packed in a column.
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Other derived Sit Unit. and their formula
Answer:
There can be numerous derived quantities all branching from the basic 7 base quantities.
Explanation:
The derived SI units are
m/s² that is of acceleration that is rate of change of velocity
m/s is the SI unit of velocity that is rate of change of displacement
Nm is the SI unit of Torque i.e T= rxF
and so on
base-free aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in water catalyzed by functionalized carbon nanotube-supported au-pd alloy nanoparticles
n addition to these noncatalytic effects, many instances have shown that water can function as a reactant and even a cocatalyst in heterogeneous catalytic reactions, enhancing reaction rates and product selectivity.
Who or what is water's catalyst?
Platinum is by far the finest catalyst for severing water molecules to form hydrogen gas, according to scientists. According to a recent study by scientists at Brown University, the reason platinum is so effective is not what was previously thought.
A catalyzed process is what?
According to definitions, catalysis is the process by which the addition of a material (the catalyst) that is not itself modified during the chemical reaction changes the pace of chemical reactions (ACS, 1996).
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How can i separate Zinc from brass
There are several methods that can be used to separate zinc from brass. One method is to use a chemical process called solvent extraction, which involves dissolving the brass in a chemical solvent that will selectively extract the zinc. Another method is to use electroplating, which involves using an electric current to coat the brass with a layer of pure zinc. Once the zinc has been separated from the brass, it can be recovered by heating the brass to a high temperature, causing the zinc to vaporize and be collected.
3. How many molecules are in 0.043
moles of HCI?
Answer:
2.59 x 10^22 molecules
Explanation:
According to Avogadro's number, 1 mole of HCl has 6.022 x 10^23 molecules.
so 0.043 x (6.022 x 10^23)/1 = 2.59 x 10^22 molecules
diazonium salt can be used to generate benzyne and the benzyne intermediate can react in the diels-alder reactions: Chemical Formula: C14H8O2 Chemical Formula: C10Hg Propose chemical
This question is generating exothermic reactions. An exothermic reaction is the process through which energy is released when bonds are broken
Given that it produces heat and is explosive in nature, the chemical reaction indicated in this question is an exothermic reaction.
Exothermic processes can, in fact, produce both heat and light. The total energy of the reactants is greater than the total energy of the products in such reactions. An endothermic reaction is one that uses energy to break bonds and stores that energy in the bonds that are created during the reaction. An exothermic reaction is the process through which energy is released when bonds are broken. For instance, combustion is an exothermic reaction that first produces heat, carbon dioxide, and water from the reaction of oxygen, wax, and energy input.
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IF YOUR ANSWER IS CORRECT YOU GET 100 EASY POINTS PLS HURRY
Given concerns over the overabundance of corn and corn-related products in American diets, which of the following distinguishes the best means of reducing corn consumption?
reducing options costs for corn crops
cutting subsidies to corn growers
increasing international corn imports
lowering prices for corn and corn products
The best means of reducing corn consumption is cutting subsidies to corn growers. Option B
What is corn?We know that corn is a kind of crop that is common in America and there are several kinds of products that we can be able to obtain from corn that are used in the care of the body. We know that corn is a cereal and a lot of baby foods are based on the use of cereals and this has brought the use of corn into very popular demand around the world and not just in the United States.
Having said all that, we know that corn is a rich source of carbohydrate but there is need for the consumption of a balanced diet and this should have to be the aim of the nutritional efforts that we tend to embark on.
This is why the reduction on the consumption of corn becomes very important as this would make the corn not to be able to remain the only staple food in many house holds in the country.
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for the following solution, choose the formula of a chemical that you could add to the solution to make a buffer: 0.1 m hc2h2o2cl (chloroacetic acid). nac2h3o2 nac3h2o2cl nac2h3o2cl nac2h2o2cl
We require the conjugate base of an acid if we have one, and vice versa. If the required species is an ion. NaC2H2O2F is one alternative for the fluoroacetate ion, C2H2O2F-, which we need as a soluble molecule.
What are solutions for buffers?The solution can act as a buffer because it contains sizable amounts of both the conjugate base, F-, and the conjugate acid, HF. The titration curve of a buffer solution shows this buffering activity.
What is a buffer, exactly?The solution of reserve acidity or alkalinity that resists pH change upon the addition of a modest amount of acid or alkali is known as a buffer. A steady pH is necessary for the majority of chemical processes. Numerous pH regulating systems in nature employ buffering.
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Which of the following combinations is best suited to make a buffer with a pH of 3.4? You are combining 50 mL of each solution to create the buffer. O 0.1 M HF + 0.1 M NaF O 0.1 M HCH3COO + 0.1 M NaOH O 0.1 M NH3 + 0.1 M NHACI O 0.2 M HCI+ 0.1 M NaOH
A weak acid or base and the salt of that weak acid or base make up a buffer. Three combinations can be used to create buffers: (1) H 3PO4 and H 2PO4; (2) H 2PO4 and HPO 4 2; and (3) HPO 4 2 and PO 4 3.
Which mixture would result in the best buffer solution?Equivalent quantities of an acid and its conjugate base are found in the most efficient buffers. An added base or an added acid can be neutralized by a buffer that has roughly equal concentrations of a weak acid and its conjugate base in solution.
Do HCl and NaCl combine to form a buffer?Strong acid hydrochloric acid (HCl) and its conjugate base, chloride sodium chloride provides an anion (NaCl). Due to the fact that we are combining a potent acid with its incredibly weak conjugate base, this will not result in a buffer solution.
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Which of the following answers has the element in the correct order for decreasing ionization energy ?
Ca, Ba, Be, Sr
Sr, Ba, Ca, Be
Ba, Sr, Ca, Be
Be, Ca, Sr, Ba
Answer:
A. Ca, Ba, Be, Sr
How many grams of solute are present in 335 mL of 0.340 M KBr?
Answer:
41
Explanation:
All cells share certain structural features, but some structures are unique to eukaryotes. Identify whether these cell components are common to all cells or unique to eukaryotic cells by moving each cell component to the correct category Common to all cells Unique to eukaryotic cells plasma membrane DNA ribosome rough endoplasmic reticulum mitochondrion nucleus
Common to all cell : Plasma membrane , Ribosome ,DNA
Unique to Eukaryotic cell : Nucleus , Rough endoplasmic , reticulum Mitochondrion.
A membrane-bound building block that contains the basic molecules of life and from which all living things are made. A single cell is often a complete organism in its own right, such as a bacterium or yeast. Other cells acquire specialized functions as they mature. These cells cooperate with other specialized cells to become the building blocks of large multicellular organisms such as humans and other animals. Cells are much larger than atoms, but they are still very small. The smallest known cells are a group of tiny bacteria called mycoplasma.
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list three types of alternative splicing patterns and how they lead to the production of different protein isoforms.
The three types of alternative splicing patterns with the correct description of how they lead to the production of different protein isoforms are: letters A, C and E.
These three options are correct because they accurately describe the different types of alternative splicing patterns and the ways in which they lead to the production of different protein isoforms. Alternative splice sites and mutually exclusive exons allow for the inclusion or exclusion of certain sequences, leading to proteins with different sequences.
How does the process that lead to the production of different protein isoforms occur?Alternative splice sites within an exon allow for the presence of different domains in the protein, while Mutually exclusive exons allow for the generation of proteins with different sequences.
Cassette exons allow for the exclusion of entire protein domains. Alternative polyadenylation produces messages with different 3' coding sequences and 3' untranslated regions, which can be important in regulatory events.
Complete question:
Choose the types of alternative splicing patterns with the correct description of how they lead to the production of different protein isoforms Select the three correct statements:
A) Alternative splice sites within an exon-different versions of an exon exist that allow for the presence of different domains in the protein. B) Mutually exclusive exons-certain sequences are either included or excluded, which allows generation of proteins with different sequences.C) Cassette exons-Whole exons are excluded from the mature message, resulting in a protein that is missing certain sequences (perhaps an entire protein domain). D) Alternative promoters produce messages with different 5' exons and proteins with different N-terminal ends. E) Intron retention-introns are included in the mature mRNAs, which can be used only to produce novel isoforms of the protein. E) Alternative polyadenylation - produces messages with different 3' coding sequences as well as different 3' untranslated regions, which can be important in regulatory events.Learn more about production of protein isoforms:
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political parties are most inclined to use which of the following strategies in national general election campaigns today?
Political parties are most inclined to match polling responses to identifiable individuals in voter files to determine patterns in national general election campaigns today.
Political parties are essential institutions of democracy. By competing in elections parties offer citizens a choice in governance, and while in opposition they can hold governments accountable. When citizens join political parties, volunteer their time, donate money and vote for their leaders, they are exercising their basic democratic rights.
In an election campaign winning is everything, there is no consolation for being a runner-up. With the increasing penetration of television and the internet, voters today are more informed, independent, and discerning in casting their votes.
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which elements has 1 valence electron in its outer shell and will react with a group 17 elements in a 1:1 ratio
Answer:Sodium(Na)
Explanation: According to electronic configuration of sodium, the outer shell has 1 unpaired electron. So, It will react with halogen elements (group 17) to form NaX. Where X is halogen element and ratio is maintained that is 1:1.
another aldol reaction could have occurred in the same reaction mixture. the enolate of acetone could have added to another molecule of acetone [instead of adding to a molecule of benzaldehyde]. predict the structure of the product if the acetone undergoes an aldol addition and dehydration with another molecule of acetone
Acetone enolate preferentially attack the benzaldehyde rather than another acetone molecule because it is a strong nucleophile which will attack the carbonyl of benzaldehyde and forms a B- carbonyl alkoxide ion.
Benzalacetone is the end product of the aldol condensation reaction between acetone and benzaldehyde. Acetone may be deprotonated to produce a nucleophilic enolate anion since it contains -hydrogens (on both sides). Because it is significantly more electrophilic than a ketone, the aldehyde carbonyl interacts with the enolate quickly. Since it dehydrates spontaneously under the reaction conditions, the original aldol adduct cannot be separated. However, the resulting, - α, β-unsaturated ketone contains active hydrogen that can condense with additional benzaldehyde molecules.
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a. 1) oso4; 2) h2o2, h2o b. this reaction is impossible c. 1) kmno4; 2) h2o d. 1) mcpba; 2) koh, h2o
The option (a)- is correct and it is impossible for the reaction .
What is reaction?
One or more chemicals, referred to as reactants, are changed into one or more new compounds, referred to as products, during a chemical reaction. Substances are composed of chemical elements or compounds.
What is compounds ?
When two or more elements combine chemically in a certain mass ratio, compounds are produced. Compounds are created when two or more different types of elements are mixed in a particular ratio of their atoms.
Therefore , the option (a)- is correct and it is impossible for the reaction .
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the following are octane levels for various gasoline blends: 87.8, 84.9 86.7 87.5 91.6 88.6 95.1 93.3 94.2 88.3 90.4 91.5 91.6 93.4 which of the following stem-and-leaf plots describe the distribution more efficiently? group of answer choices a stem-and-leaf plot by using the tens digit as the stem a stem-and-leaf plot by using the first two digits (tens and ones digits) as the stem
plot(density(x),col = "blue") #As we can see the distribution is fairly Normal
q q line(x, col = "blue") #In Q Q P Lot the straight blue line should pass through maximum number of point at 45 degree (x, col = "blue", freq = FALSE)
lines(density(x), col = "red", lwd = 2) #We can also check distribution of Normal by Histrogram and superimpose red line
ad .test(x) #Anderson Darling test gives p value 0.1424 that mean there is 14.24 percent chance that his data is coming from Normal
t(x) Cramer-von Mises test gives p value 0.2147 that mean there is 21.47 percent chance that his data is coming from Normal
Llliefors (Kolmogorov-Smirnov) test gives p value 0.2355 that mean there is 23.55 percent chance that his data is coming from Normal
Pearson chi-square test gives p value 0.7301 that mean there is 73.01 percent chance that his data is coming from Normal
Shapiro- Francia test gives p value 0.03482 that mean there is 3.48 percent chance that his data is coming from Normal
Shapiro-Wilks test gives p value 0.07154 that mean there is 7.15 percent chance that his data is coming from Normal
#If p-value <= Alpha(=0.05) reject null hypothesis(i.e sample points comes from Normal Population) but we take Shapiro-Wilks test into account because it is distribution free and regarded as best test for Normality hence we accept the null hypothesis and conclude that the sample comes from Normal Distribution but it is not very much likely.
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the standard reduction potentials for fluorine gas to the fluoride ion and the aluminum (iii) ion to aluminum metal are 2.866 v and -1.662 v, respectively. t/f
The statement saying the standard reduction potentials for fluorine gas to the fluoride ion and the aluminum (iii) ion to aluminum metal are 2.866 v and -1.662 v, respectively is true.
The standard reduction potential of a species is defined as the measure of the ability of that species to get reduced during a redox reaction.
The value of the standard reduction potential are pre decided for each and every element.
The value of the standard reduction potential for fluorine gas to the fluoride ion is +2.866 V.
The value of the standard reduction potential the aluminum (iii) ion to aluminum metal is -1.662V.
Both of these values are stated correctly in the given question. So, the given statement is true.
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pyruvate is the end product of glycolysis. its further metabolism depends on the organism and on the presence or absence of oxygen. draw the structure of the product from each reaction as it would exist at ph 7. include the appropriate hydrogen atoms.
the proper hydrogen atoms, CH 16 q 3. The organism and the presence or lack of oxygen determine metabolism.
What are the 3 different types of metabolism?Ectomorph, muscle mass, and endomorph are the three basic metabolic types. These are phrases you generally won't hear in your typical, everyday talks. However, understanding the body types you are born with will benefit your exercise program over time.
what is metabolism?The chemical processes that occur inside the body's cells during metabolism convert food into energy. Our bodies need this energy for all of their functions, including movement, thought, and growth.. The chemical processes of metabolism are regulated by various proteins in the body.
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Need an answer please
An electrostatic force of attraction between Ba ⁺² and P⁻³. Because barium has positive charge and phosphorus has negative charge. Therefore, option C is correct.
What is electrostatic force ?Non-contact forces, such as electrostatic forces, pull or push on objects without actually making contact with them. When certain materials are rubbed together, a phenomenon known as "charge" can be transferred from one surface to another. Uncharged items are pulled by charged objects, which in turn may push or pull against other charged ones.
The complete transfer of one or more electrons results in the formation of an ionic bond between two oppositely charged ions, which is where the electrostatic force of attraction takes place.
Thus, option C is correct.
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based on your knowledge of intermolecular forces and trends, select the statement that most accurately compares hcl and hbr.
Since HBr has the largest mass, it will have the highest boiling point. Due to higher dipole, the intermolecular force between SiH4 molecules is stronger than that between h-cl molecules.
A polar molecule, HBr exhibits dipole forces. Dispersion forces also exist between HBr molecules. Van der Waals forces would be the dominant interactions in these molecules. The larger the size or molecular mass of hydrogen halides, the stronger the van der Waals forces and the higher the boiling point will be. Of these three halides, HI has the largest size or molecular mass. In H-Cl, there is no H-bonding. Therefore, the boiling point is lower. Moving on to HBr and HI, the molecules get bigger, the van der Waal forces get stronger, and the boiling point gets hotter. H-Cl has the lowest boiling point as a result.
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draw all of the resonance contributors for the ortho, meta, and para benzenonium intermediates in the chlorination of benzaldehyde and explain why ortho/para substitution predominates.
The combination of ortho and para produces a resonance structure that stabilises the arenium ion. As a result, ortho and para products form faster than meta. Because of steric effects, the para product is generally preferred.
In ortho-substitution, two substitutions occupy adjacent positions, that can be numbered 1 and 2. These positions are branded R and ortho in the diagram. The substituents in morpho occupy positions 1 and 3.The ultimate predictor of whether a methyl group is ortho-, para-, or meta-directing is its ability to stabilise an adjacent carbocation. Substituents with a covalent bond on the atom adjacent to a aromatic ring are ortho- and para- executives since they can form a new pi-bond with an adjoining carbocation. For electrophilic substitution, electron donating groups in an aromatic ring are made reference to as ortho/para groups.
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explain why ncl3ncl3 is a liquid at room temperature while nh3nh3 is a gas. explain why is a liquid at room temperature while is a gas. hydrogen bonding is present in ncl3ncl3 but not in nh3nh3 . ncl3ncl3 has greater dipole moment than nh3nh3 and thus the dipole-dipole forces in ncl3ncl3 are stronger. the dispersion forces are greater in ncl3ncl3 than in nh3nh3 . ncl3ncl3 partly dissociates to form ions and nh3nh3 does not. therefore, ion-dipole interactions are present in ncl3ncl3 but not in nh3nh3 .
The NCl₃ is liquid at room temperature but NH₃ is gas at room temperature because NH₃ has the intermolecular hydrogen bonding , it hold thew ammonia very tightly.
The NCl₃ is liquid at room temperature but NH₃ is gas at room temperature because NH₃ has the intermolecular hydrogen bonding , it hold thew ammonia very tightly. the van der waal force is the weak force ads compared to the hydrogen bonding. NCl₃ partly dissociates to form ions and nh3nh3 does not. therefore, ion-dipole interactions are present in NCl₃ but not in NH₃
Thus, NH₃ is the gas at the room temperature and the NCl₃ is liquid at room temperature.
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After the explosion of the Deepwater Horizon oil-drilling platform in 2010, Scientists estimate that BP removed about ___ of the oil, most of it recovered directly from the well, burned at sea, or skimmed by boats
25%
After the explosion of the Deepwater Horizon oil-drilling platform in 2010, Scientists estimate that BP removed about 25% of the oil, most of it recovered directly from the well, burned at sea, or skimmed by boats.
Deepwater Horizon was a semi-submersible offshore drilling rig. It was owned by Transocean and operated by BP. While drilling at the Macondo Prospect on 20 April 2010, an explosion happened on the rig, killing 11 crewmen and igniting a massive fireball that was visible from 40 miles away.
The explosion was caused by a blowout, which is an uncontrollable crude oil and/or natural gas release from an oil well caused by a pressure control system failure. The rig itself sank two days after it exploded.
Both Transocean and BP received hefty fines, penalties, and compensations. On top of that, BP is also tasked with the oil spill cleanup, though other parties such as US Coast Guard also join in this effort. It took over ten years to clean the oil spill.
Attached below is an image of the Deepwater Horizon remains in flames after the explosion, taken on 20 April 2010 by US Coast Guard.
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component that interacts more strongly with the liquid phase travels up further than one that interacts more strongly with the stationary phase
The stationary phase, which is the part of chromatography that doesn't move and is typically a solid a liquid supported on the a solid, is the component whose high solubility inside the liquid phase results in a high retention period.
Which substance engages the stationary phase the most?Along with a stationary phase of polar paper, the solvent functions as the mobile phase.Nonpolar chemicals will interact with the solvent and move more swiftly,while polar compounds will move more slowly and interact with the paper.
Which area is most receptive to the stationary phase?The stationary phase and green dye A have the strongest affinities.Because it has traveled a shorter distance from the source, it adsorbes to a stationary phase at a faster rate.
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If the difference between 30 tines k and 35 is 235 find the value of k
when an object is totally submerged in fluid, this object will be heavier (its mass will be larger) than when it is in the air
The Archimedes principle states that when an object is submerged in a fluid, it seems to lose weight proportional to the weight of the fluid that was displaced.
The mass of the water that the object moves is equal to this force. It turns out that it is still possible to demonstrate that even if the object is excessively heavy (density more than water), if the density of a fully submerged object (independent of its shape) is larger than the density of the fluid. Some objects float when submerged in a liquid because the buoyant force is greater than the object's weight, causing the object to rise to the surface and float. If an object's buoyant force exceeds its weight when submerged in a fluid, it will rise. We can determine the mass and weight of water once we know its volume.
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Determine the empirical formula of a compound that contains the following percentages of elements by mass:Mo = 43.95%, O = 7.33%, Cl = 48.72%
If a compound that contains the elements by mass: Mo = 43.95%, O = 7.33%, Cl = 48.72% then the empirical formula will be Cl3MoO
The molar mass of Cl=35.453,
Molar mass of Mo=95.94,
Molar mass of O=15.9994
Converting these to moles: Cl=1.3742137477787, Mo=0.45809881175735, O=0.45814218033176
Here the smallest mole value is 0.45809881175735
Now we have to divide all components by the smallest value: Cl=2.9998194985641, Mo=1, O=1.0000946707856
If we don't consider the fractional values the closest round of values will be: Cl=3, Mo=1, O=1
So the formula becomes Cl3MoO
Therefore the required empirical formula is Cl3MoO
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how many degrees of unsaturation are present in a molecule with the molecular formula c5h8brno? (1 pts)
The degree of unsaturation of the compound is 3.
What is the degree of unsaturation?When we talk about the degree of unsaturation, we are referring to the number of the hydrogen atoms that could not be found in the system. We know that when a saturated compound is formed, there is the loss of some of the hydrogen atoms from the molecular formula.
The term unsaturated in itself means that the compound do not have the exact number of the hydrogen atoms or the hydrogen atom compliment that it should normally have.
This would happen as the multiple bonds are formed then a given number of the hydrogen atoms would be lost from the system so that the multiple bond can now be formed in the compound that we are looking at. The more the number of the multiple bonds, the more the degree of unsaturation of the molecule.
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