The molar mass of butane is 54.62mol^-1.
What do you mean by molar mass?
Substances take up space and have mass. Molecules, which make up substances, often need to be measured in experiments, and it is important that these measurements are accurate. But, how can we measure something so small in an accurate way? How do we normally measure molecules? In the science laboratory, we use a tool called an analytical balance to measure in grams.
Through careful calculation, scientists can determine the number of moles a specific reaction will need. A mole is a unit of measure that helps us compare particles of any given substance and its mass. If we already know the number of moles needed, we can use the concept of molar mass to calculate how many grams of the substance are required. The molar mass, also known as molecular weight, is the sum of the total mass in grams of all the atoms that make up a mole of a particular molecule. The unit used to measure is grams per mole.
Given,
Pressure = 1.007 atm = 1.02 bars
Volume = 26.7 ml = 0.0267L
Temperature = 20degree C= 293 K
By applying ideal gas equation ,
We can find number of moles of butane
n = PV/RT
So, P*V=1.02 bar * 0.0267L = 0.027234
R*T = 0.083 (bar L K^-1mol^-1) * 293K = 24.319
Therefore, n = 0.027234/24.319 = 0.00119moles
Now,
To calculate molar mass of butane
We know,
Molar mass = mass of substance in gms/ no. of moles in substance
Here, mass of butane is given as 0.065gm
Therefore, molar mass = 0.065 /0.00119
= 54.62
Hence, molar mass of butane is 54.62mol^-1
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explain why the spectra belongs with methyl butanoate. did the spectra you picked match your initial description?
Ester group presence is shown by the carbonyl stretching C=O. for ester, which is found to be about 1735 cm-1.
It is an oily layer that forms on water at normal temperature and is a colourless liquid with low solubility in water. In addition to this, the structure of methyl butanoate can also be determined using IR spectra.
What is the purpose of methyl butanoate?
A white liquid with an apple-like odour is methyl butyrate. It serves as a solvent as well as a flavouring and aroma ingredient.
Methyl butyrate is a member of the group of organic substances called fatty acid methyl esters.
"Methyl butanoate" is the name given to the ester produced by the condensation reaction between methanol and butanoic acid.
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a reaction has an activation energy of 180 kj/mol. if the reaction were completed at 100, 200, 300, and 400 oc, which would you expect to have the smallest rate constant?
The activation energy of a reaction is 180 kJ/mol. Which of the following rates would you expect if the reaction was completed at 100, 200, 300, or 400 oc...
How do you calculate a reaction's activation energy?
Activation energy calculation:
Using the Arrhenius Equation to calculate the rate constant k at various temperatures.
A reaction's activation energy can be calculated.
The activation energy can be calculated using the equation: ln (k 2 / k 1) = E a / R (1 / T 1 - 1 / T 2).
How do you calculate kJ mol activation energy?
Problem with Activation Energy
Convert temperatures from degrees Celsius to Kelvin in Step 1. T = 273.15 + degrees Celsius T1 = 3 + 273.15. ...
Step 2 - Locate
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Provide a detailed procedure for the conversion of a tertiary alcohol to an alkyl halide via a SN1 reaction. Compare (and explain) the difference in reaction mechanism when primary alcohols are used instead of a tertiary alcohol. All chemical structures should be hand drawn. You can add images into your responses by clicking on the icon that looks like a mountain landscape. Cut and paste text/figures will not be graded.
Primary alcohols react using the SN2 mechanism, whereas secondary and tertiary alcohols react using the elementary SN1 process, where no carbocation is produced.
What separates tertiary alcohol from primary alcohol?The carbon atoms attached to OH can be used to identify the kind of alcohol.According on how many other carbons are linked to that carbon, the alcohol is categorized as primary, secondary, or tertiary.
Why does primary alcohol respond more quickly than secondary alcohol?Tertiary alcohols' alkyl groups provide electron density to the alcohol's oxygen, which reduces the alcohol's acidity.When a result, the acidity of alcohol reduces as more alkyl groups are connected to an alcohol functional group on carbon.
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NaHCO3 + HCI → NaCl + H₂O + CO₂
NaHCO3: 82.99 g/mol
You previously determined that a
particular sealed container holds
0.261 mol CO2 gas. What mass of
NaHCO3 is needed to generate the CO2?
Hint: Use stoichiometry
Answer: 14.34
Explanation:
A single replacement reaction is a reaction in which one element replaces a similar element within a compound.
A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another.
In a single replacement reaction, what replaces what?When one element replaces another in a compound, it is known as a single replacement reaction. A + BC → B + AC is a good representation of this kind of reaction. When two ionic compounds exchange ions and create two new ionic compounds, this is known as a double replacement reaction.
What reaction occurs when one element in a compound substitutes another?Replacement is the reaction that occurs when one element swaps places with another in a compound or when two components in two separate compounds switch places.
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what is the temperature in kelvin of an 11.2-l sample of carbon monoxide, co, at 744 torr if it occupies 13.3 l at 55 ⁰c and 744 torr?
276K is the temperature in Kelvin of an 11.2-L sample of carbon monoxide, CO, at 744 torrs if it occupies 13.3 L at 55 ⁰C and 744 torrs
It is given that the volume of Carbon monoxide is 1.2L and its pressure is 744torr.
We need to find its temperature if it occupies 13.3L at 55⁰C or (55+273 = 328K) at 744torrs.
For this, we need to use Charle's law which is given by,
V₁/V₂ = T₁/T₂
On rearranging the formula we get,
T₂ = T₁V₂/V₁
On substituting the values to the formula we get,
T₂ = 328x13.3/11.2
T₂ = 24.661/11.2
T₂ = 276K
Therefore, the temperature in Kelvin is 276K.
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You add 100. 0 g of water at 60. 0°c to 100. 0 g of ice at 0. 00°c. Some of the ice melts and cools the water to 0. 00°c. When the ice and water mixture has come to a uniform temperature of 0°c, how much ice has melted?.
As the ice and water mixture in the given situation becomes a uniform temperature of 0°c, the amount of ice that has melted is 75.4g.
Different substances require different amounts of heat to cause a temperature change. The specific heat capacity of a substance refers to the quantity of heat required to increase the temperature of a unit quantity of the substance by one degree. Hence, the amount of heat added Q is given by:
Q = w x Cp x ∆T
where w is the weight of substance, Cp is specific heat of material, and ∆T is the change in temperature.
According to given data,
w = 100gm
Cp = 4.186J/g°c
∆T = -60
Hence, the amount of heat needed to melt ice is:
Q =100.0g (4.186J/g°c) (-60°C) = -25116J
When the mixture is at a uniform temperature, heat lost by water which is gained by ice is given by
Q = m*ΔH
Where ΔH is the change in enthalpy.
Hence,
-25116J = m*333J/g
m = -75.4g
Therefore, mass of ice is 75.4 g.
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The first five ionization energies (IE_1 through iE_5) of a Period 2 element have the following pattern: Make reasonable guess about which element this is. Enter its chemical symbol below.
There is huge difference in ionisation energy between IE4 and IE5. This means, lots of energy are required to remove 5th electron. So, after 4 electrons are removed, the element has acquired noble gas configuration,. So, ether are 4 valence electrons in the element.
The element in period 2 with 4 valence electrons is Carbon
Answer: C
Chemically, carbon is an element with the symbol C and atomic number 6. Carbon, which is categorized as a nonmetal, is a solid at ambient temperature. Unattached or attached to an atom, an electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom.
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when the reaction h3po4(aq) ca(oh)2(aq)→ occurs, what is the formula for the salt formed? express your answer as a chemical formula.
For the reaction of H₃PO₄(aq) Ca(OH)₂(aq), the formula for the salt formed is Ca(HPO₄).
When a reaction occurs between acid and a base, neutralization reaction takes place to form salt. In such reaction sometimes the replacement of the hydrogens in the acid by the cation of the base is complete, and sometimes there is a partial replacement ,as in the above case. In this reaction, the cation of the base is Ca²⁺ and it will react with the anion HPO⁴⁻ of the acid.
H₃PO₄ + Ca(OH)₂ → Ca(HPO₄) + 2H₂O
As you can see, water is also formed as a product of the reaction.
From the formula the salt formed is Ca(HPO₄).
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Consider two separate samples of sf6 (g) and n2 (g), both at 1. 00 atm and containing same number of moles. If the temperature of the sf6 (g) sample is 16. 0 oc, at what temperature (oc) will the n2 (g) sample have the same root mean square velocity as sf6 (g)?
The temperature of N2 will be -217.6 C.
Define molar mass:
A chemical compound's mass M is equal to its amount of substance, expressed in moles, multiplied by its mass.
By definition:
Vrms = sqrt ( 3RT/M)
Here R is the gas constant
Given:
N2 and SF6 have the same root mean square velocity
so
Tn2 / Mn2 = Tsf6 / Msf6
Given:
Tsf6 = 16 C = 22 + 273 K = 289 K
Msf6 = 146.06 g/mol
Mn2 = 28 g/mol
Tn2 = ??
Now,
Tn2 / 28 = 289 K / 146.06
Tn2 = 55.40 K
Tn2 = 55.40 - 273 C
Tn2 = -217.6 C
Therefore, the temperature of N2 will be -217.6 C.
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Predict the missing component of each reaction. ? + 2 upper n a upper b r right arrow 2 upper n a upper c l plus upper b r subscript 2. Hcl cl2 na hbr right arrow upper m g upper o plus upper h subscript 2. ? cho c2h2 + co2 co2 + 2h2o c + 2h2o.
The missing component = H₂O
Given reactions are;
First reaction => displacement reaction
Second reaction => production of MgO and hydrogen gas.
1. The missing component is Cl₂.
2. The missing component is H₂O.
Reasons:
1. The given reaction can be represented as follows;
? + 2NaBr 2NaCl + Br₂
The above reaction has both 2 Na and 2 Br on the side of the reactants, and 2 Na, 2 Br, and 2 Cl on the side of the products. Here the missing component is Cl₂
2. The possible given reaction is presented as follows;
Mg + ? HBr MgO + H₂
The elements in the reactant side of the reaction are 1 Mg and unknown element (?)The elements in the product side are one Mg one O and two H .Therefore the the missing elements in the reactants are, 2 H and 1 O, which gives the missing component = H₂O.
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if a radioactive substance has a half-life of one year how much of it will be unchanged after four years
After four years, only one-sixteenth (1/16) of the original radioactive substance will remain unchanged.
What is an atom?
A chemical element is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or more negatively charged electrons that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.The fundamental building components of matter are atoms. Atoms make up anything that has mass and occupies space.The atomic mass, also known as the atomic weight, is the sum of the masses of the protons, neutrons, and electrons in an atom. In atomic mass units, the weight or mass of an atom is expressed.This is because each half-life period causes the amount of the substance to decrease by half. After one year, half of the substance will remain, and after two years, one quarter (1/4) of the original substance will remain. After three years, one eighth (1/8) of the original substance will remain, and after four years, one sixteenth (1/16) of the original substance will remain unchanged.
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which of the following are true statements regarding electronegativity? select all that apply, this is a multiple response question.
1. Electricity gain. The energy released when an atom accepts an electron is measured by enthalpy.
Thus, the first one is false as stated. The amount of energy released when an atom receives an electron is measured as electronegativity.
2. The ability of a boned atom to attract other atoms is known as electronegativity.
Because it mentioned an attractive force between two electrons in the same orbital, the second one is equally wrong.
3. Ionization. The energy needed to extract an electron from an atom is measured by enthalpy.
As a result, the third one is also inaccurate. The amount of energy needed to remove an electron from an atom is measured as electronegativity.
4. Electronegativity is a measurement of the strength of the attraction of electrons in a covalent bond to an atom.
It is accurate because covalent bonds can have polar or nonpolar atoms and still exhibit electronegativity.
5. Electronegativity is a characteristic that indicates whether a bond is polar or non-polar.
Since electronegativities between atoms can be used to predict whether a bond between them is polar or nonpolar, the fifth option is true.
6. Electronegativity falls from top to bottom as atom size increases and bonding electrons move farther from the nucleus. Electronegativity increases when travelling from left to right as well, but given this, it should be decreasing to the right side, which is erroneous.
Because electronegativity rises from left to right and falls from top to bottom, this is false.
So, The statement 1, 2, 3, 6 are incorrect and statement 4 &4 are correct.
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Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 6 electron groups (5 bonds and 1 lone pair electrons).
a. octahedral, octahedral, 90°
b. octahedral, square planar, 90°
c. octahedral, square pyramidal, 90°
A six-electron group molecule's molecular structure, bond angles, and electron group geometry are trigonal pyramidal, stetrahedral, and 109.5°, respectively.
An electron's compositionIt is possible for an electron to be free or linked to an atom. There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom.
What purposes serve electrons?To create cross-platform desktop apps using HTML, CSS, and JavaScript, GitHub created the open source package called Electron. By fusing Node and Chromium, Electron achieves this. Apps may be bundled for Linux, Windows, and Mac using a single runtime that supports JavaScript.
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add one or more curved arrows to show the movement of electrons in the reaction: to draw the arrows, select more in the drawing menu, then select the appropriate curved arrow. click on a bond or electron to start a curved arrow. do not start from an atom. use the select tool to move the arrow head and tail to the desired placement. the curved arrow changes from red to black when appropriately placed. draw a curved arrow. do not add or delete any bonds or atoms.
Do not add or delete any bonds or atoms. H3C - O - O - CH -HCOCH2.
The electron is a subatomic particle with a poor primary electric-powered fee. Electrons belong to the first generation of the lepton particle family and are generally conceived to be simple debris due to the fact they haven't any acknowledged additives or substructure.
Electrons are negatively charged particles that orbit across the outside of the nucleus. They spin so rapidly that it could be difficult for scientists to examine them. they're drawn to the fine rate of the protons and are the smallest debris in an atom - you could match 2000 of them into a proton.
Electrons are the smallest of the debris that makes up an atom, and they create a bad charge. The number of protons and electrons is the same in a neutral atom. The hydrogen atom, for example, has simply one electron and one proton.
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a melting point test as performed on the alum sample. what two things does this test tell you about a compound
a melting point test as performed on the alum sample. It confirms the identity of the compound and measures its purity. Impurities decrease the melting point and gives a bigger range of melting point.
The point at which a material transforms from a solid to a liquid is commonly referred to as the melting point. The melting point of a liquid is the temperature at which, under atmospheric pressure, a solid transforms into a liquid. At this time, both the liquid and solid phases are in equilibrium. A substance's melting point is the temperature at which, under normal pressure, it transforms from a solid state to a liquid state. 0 degrees Celsius applies to water (32 Fahrenheit, 273,15 Kelvin). Alum is an inorganic chemical compound that often consists of sulfates, aluminum or other metals, and water molecules. Alum is essentially hydrated aluminum double sulfate salt.
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When a sodium atom reacts with a chlorine atom to
form a compound, the electron configurations of the
ions forming the compound are the same as those in
which noble gas atoms?
1) krypton and neon
3) neon and helium
2) krypton and argon
4) neon and argon
Answer:
4) Neon and Argon
Explanation:
Sodium has 11 electrons, Chlorine has 17.
For both of them to complete their shells Sodium will give one electron to chlorine.
Sodium will become 2,8 in the reaction.
Chlorine will become 2,8,8 in the reaction.
2,8 is the electron configuration of Neon.
2,8,8 is the electron configuration of Argon
the decay rate for a radioactive isotope is 3.3 percent per year. find the half-life of the isotope. round to the nearest tenth of a year.
The half-life of the isotope is 21 years when the decay rate for a radioactive isotope is 3.3 percent per year.
It is given that in the isotope the decay rate for a radioactive isotope is 3.3 percent per year, then the half-life of the isotope can be computed by the following formula,
Half-Life formula:
N(t) = No e^-λt............(1)
Where,
N(t) is the amount of isotope at time 't'
No is the Initial Amount of isotope.
λ is the decay constant
t is time in years. (here).
Then, N(t) = No/2 at half-life.......(2)
λ = 3.3/100
λ = 0.033
Substituting (2) in (1) we get,
No/2 = No e^-0.0033t
1/2 = No e^-0.0033t
By taking ln on either sides, we get
ln (1/2) = ln(e^-0.0033t)
ln(1/2) = -0.033t ln(e)
ln(1/2) = -0.033t
t = -1/0.033 ln(1/2)
t = +0.693147181/0.033
t = 21.0125672
t = 21 years
The half-life of the isotope is 21 years.
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Undecane is an alkane that contains an 11-carbon chain. How many hydrogen atoms are in undecane?.
Straight-chain alkane undecane has 11 Carbon atoms in it.
How many atoms of hydrogen and carbon are there in decane?10 carbon atoms and 22 hydrogen atoms are covalently linked together to form the hydrocarbon decane. Decane is a member of the enormous organic family known as alkanes. The only atoms in the hydrocarbon molecules of the alkane family are carbon and hydrogen.
An alkyne with 16 carbon atoms has how many hydrogen atoms?Consequently, the alkyne with 16 hydrogen atoms has the formula C9H16 C 9 H 16. Alkenes are hydrocarbons with a double bond connecting the carbon atoms. Their usual formula is CnH2n, or C n H 2 n. 2n = 44, where n is the number of hydrogen atoms.
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calculate the heat capacity, in calories per degree, of 28.4 g of lead. specific heat of lead is 0.129 j/g °c, 1 calorie
The heat capacity, in calories per degree, of 28.4 g of lead is 3.67 j/g °c.
Heat capacity or thermal capability is a physical property relying on, described as the amount of heat to be provided to an object to produce a unit trade in its temperature. The SI unit of heat ability is joule in line with kelvin. warmth capability is an extensive belonging.
Calculation:-
Heat capacity = m × specific heat capacity
= 28.4 g × 0.129 j/g °c
= 3.67 j/g °c
Heat capacity or specific warmth is the quantity of warmth in step with unit mass that is required to raise the temperature through 1°C. particular heat is helpful in determining the processing temperatures and quantity of warmth necessary for processing and can be useful in differentiating among polymeric composites.
The Specific heat ability of a substance is usually determined consistent with the definition; namely, by means of measuring the heating capacity of a sample of the substance, generally with a calorimeter, and dividing via the pattern's mass .
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7.93 mol of c5h12 reacts with excess o2, how many moles of co2 will be produced by the following combustion reaction?
As a result, 7.93 moles of C5H12 will react with extra oxygen to become 39.65 moles (7.93*5).
What does oxygen contain?Chemical elements, like oxygen, are compounds that only have one type of atom. An oxygen atom has eight protons in its nucleus since it has an atomic number of eight and is represented by the chemical symbol O.
What is a normal oxygen intake?95% or more oxygen is considered to be a normal level. 90% of patients with sleep apnea or chronic lung illness may have normal levels. The "SpO2" value on a pulse oximeter displays the blood's oxygen content as a percentage. Call your healthcare practitioner if the SpO2 level you take at home is less than 95%.
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All of the following species contain N-O bond(s): NO-, NO2-, NO3-Draw the Lewis structure(s) for each, then answer the following questionsWhich has the strongest N-O bond? --A. NO⁻B. NO₂⁻C. NO₃⁻Which has the longest N-O bond? --A.NO⁻B.NO₂⁻C. NO₃⁻
A chemical bond is an attraction between atoms and ions that holds them to form new molecules or crystals. The bond between one species and another differs in strength and length.
In NO bonds, the more oxygens it contains the more spread out their electron density. The more oxygen atoms cause the bond order to decrease, resulting in this conclusion: the higher the bond order, the stronger and the shorter the bond. NO₃⁻ contains more oxygen, thus it has the longest and the weakest N-O bond.
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If the half-life of a radioactive element is 8 years, what percentage of the original sample would be left after 32 years?.
If the half-life of a radioactive element is 8 years, 6.25% of the original sample would be left after 32 years.
The half-life of a radioactive element is the amount of time it takes for half of the original sample of the element to decay. After 8 years, half of the original sample would have decayed, leaving 50% of the original sample. After 16 years, half of that remaining sample would have decayed, leaving 25% of the original sample.
After 24 years, half of the remaining sample would have decayed, leaving 12.5% of the original sample. After 32 years, half of the remaining sample would have decayed, leaving 6.25% of the original sample.In conclusion, after 32 years, only 6.25% of the original sample would be left.
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37.25 g of a hydrate was heated until all of the water in the hydrate evaporated. The mass of the anhydrous compound remaining was 26.81 g. What is the percent by mass of water in the hydrate?
Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Thus, the mass percentage of water in given compound is 27.9%.
What is percentage by mass?
Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.
Hydrated compound + Δ[tex]\rightarrow[/tex] anhydrate compound +water
mass of hydrate compound =mass of anhydrate compound + mass of water
mass of hydrate compound=37.25 g
mass of anhydrate compound=26.81 g
37.25 g =26.81 g+ mass of water
mass of water=10.4g
Percentage of mass of water = (component’s mass ÷ total mass) x 100%
Percentage of mass of water = (10.4g ÷37.25 g) x 100%
=27.9%
Thus, the mass percentage of water in given compound is 27.9%.
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Which guideline, Hund's rule or the Pauli exclusion principle, is violated inthe following orbital diagrams?
Please help!!!!
true or false: the outer orbitals of a halogen are further from the nucleus and are thereby more polarizable.
True. The outer orbitals of a halogen are further from the nucleus and are thereby more polarizable.
What is a Halogen?
A halogen is a type of element found on the periodic table that belongs to the halogen group (Group 17). Halogens are nonmetallic elements that have seven valence electrons and react with other elements to form compounds. They are highly reactive and can combine with other elements to form compounds, such as salts, acids, and oxides. Halogens are important in industry and are used to make a wide variety of products, including plastics, pharmaceuticals, and insecticides.
A halogen's outer orbitals are further away from the nucleus, making them more polarizable due to their greater distance from the positively charged nucleus. Because of the greater distance, the orbitals are more susceptible to being pulled by the opposite charges of other molecules, allowing for greater polarizability.
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Can a pure element be a compound? Why or why not?
Yes, compounds are pure substances as they are made of molecules that are formed by the union of atoms of different elements through chemical bonding. Hence, molecules are the fundamental unit of compounds. Each compound is made of only one type of molecule.
Students are comparing the functions of carbohydrates and lipids. Which cellular function would be shared between carbohydrates and lipids?.
The function which carbohydrates and lipids shared with each other is energy storage. So the option a is correct.
Complex carbohydrates (e.g. polysaccharides) and lipids both contain a lot of chemical energy and can be used for energy storage.Complex carbohydrates and lipids are both insoluble in water - they are not easily transported.Carbohydrates and lipids both burn cleaner than proteins (they do not yield nitrogenous wastes).Lipid molecules contain more energy per gram than carbohydrates (about twice as much)Carbohydrates are more readily digested than lipids and release their energy more rapidlyAnimals tend to use carbohydrates primarily for short-term energy storage, while lipids are used more for long-term energy storageCarbohydrates offer a ready source of fuel to your cells, while lipids can store energy in your fat tissue for later use.. Carbohydrates and lipids both contain carbon (C), hydrogen (H), and oxygen (O).
Carbohydrates are animals main source of energy.
The most common lipids in animals are fats that are present in specific cells as an essential cell part and supply energy for cellular activities. The cell membranes hormones and vitamins are made up of lipids.
Your question is incomplete most probably your full question was
Students are comparing the functions of carbohydrates and lipids. Which cellular function would be shared between carbohydrates and lipids?
a) energy storage
b) protein formation
c) energy consumption
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when 50.0 g block of a metal at 500 oc is plunged into 50.0 g of water (specific heat capacity 4.2 j/g.oc) at 20 oc, the final temperature of both the metal and the water is 60 oc. if no heat is lost to the surroundings, what is the specific heat capacity of the metal in j/g.oc? give your answer to 2 significant figures.
The specific heat capacity of the metal is 0.3818.
Heat (released) = Heat (absorbed)
As we know,
Q = mcΔT = m × c × [T (final) - T (initial)]
∴ -[m₁ × c₁ × {T (final) - T₁}] = [m₂ × c₂ × {T (final) - T₂}]
Where,
q = heat absorbed or released
m₁ = mass of metal = 50.0 g
m₂ = mass of water = 50.0 g
T (final) = final temperature = 60° C
T₁ = temperature of metal = 500° C
T₂ = temperature of water = 20° C
c₁ = specific heat of metal = ?
c₂ = specific heat of water = 4.2 j/g°c
Now substitute the values in eq (1) and solve for c₁,
-[50 × c₁ × {60 - 500}] = [50 × 4.2 × {60 - 20}]
⇒ -[50 × c₁ × -440] = [50 × 4.2 × 40]
⇒ 22000 c₁ = 8400
⇒ c₁ = 8400/22000
⇒ c₁ = 0.3818
Hence, specific heat capacity of the metal is 0.3818.
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gallium is produced by the electrolysis of a solution made by dissolving gallium oxide in concentrated naoh(aq).naoh(aq). calculate the amount of ga(s)ga(s) that can be deposited from a ga(iii)ga(iii) solution using a current of 0.390 a0.390 a that flows for 80.0 min.
The amount of Gallium that can be deposited is 0.450 g.
Obtain the equation of gallium (III) to gallium that occurs in the electrolysis.
Ga³⁺ + 3 e⁻ → Ga
The relations important for the calculations are:
1 minute = 60 second
1 Ampere = 1 Coulomb / second
The charge of 1 mole of electrons is 96,468 Coulomb (Faraday's constant)
1 mole of gallium is deposited when 3 moles of electrons circulate.
The molar mass of gallium = 69.72 g/mol
Obtain the mass of gallium deposited from a Ga(III) solution using a current of 0.390 A that flows for 80.0 min
80 min × 60s/1min × 0.390c/s × 1 mole⁻/96,468c × 1 mol Ga/3 mole⁻ × 69.72g/1mol Ga = 0.450 g
Hence the mass of the Ga deposited is 0.450 g.
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