The total number of moles of electrons transferred from Al to H⁺ is 6
The given reaction can be split up into two half-reactions as follows:
2 Al (s) → 2 Al³⁺ (aq) + 6 e⁻
6 H⁺ (aq) + 6 e⁻ → 3 H₂ (g)
From the first half-reaction, it is clear that 2 moles of Al give out 6 moles of electrons to become Al³⁺.
From the second half reaction, it is clear that these 6 moles of electrons are accepted by H⁺ to become H₂ gas.
What is a half-reaction?
A half reaction is either the oxidation or reduction reaction component of a redox reaction. A half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction
How does half-reaction work?
In general, the half-reactions are first balanced by atoms separately. Electrons are included in the half-reactions. These are then balanced so that the number of electrons lost is equal to the number of electrons gained. Finally, the two half-reactions are added back together.
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Answer:
3
Explanation:
because i did this when i was a kid
What is the estimated density of the table tennis ball? Record your answer to the nearest hundredth. G/cm3 What is the estimated density of the golf ball? Record your answer to the nearest hundreth. G/cm3
Answer:
The estimated density of a table tennis ball is around 2.7 g/cm^3. The estimated density of a golf ball is around 1.5 g/cm^3.
Explanation:
why was it important to ensure that the solute was completely dissolved in the cyclohexane before freezing the solution
It important to ensure that the solute was completely dissolved in the cyclohexane before freezing the solution because it affects the freezing point of the solution.
When a solute dissolves in a solvent, it reduces the solvent's freezing point, which implies the solution must be chilled to a lower temperature than the pure solvent in order to freeze. This is referred to as freezing point depression.
If the solute is not entirely dissolved in the solvent, the resultant solution may have a non-uniform composition, with greater concentrations of solute in certain places than in others. This might cause the freezing point of the solution to be lower than predicted, as well as the production of crystals or other solid particles, which can interfere with the experiment's accuracy.
Furthermore, if the solute is not entirely dissolved, the resultant solution may not be homogenous, and its characteristics may differ from one section of the sample to the next. This might result in inconsistencies and inaccuracies in the experiment.
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calculate the mass percent of a sucrose solution that is made by mixing 3.950 grams of sucrose into water until the solution has a mass of 20.6 grams
The mass percent of the sucrose solution is 19.17%, thus we can calculate it using the formula mass percent = (mass of solute mass of solution) 100%.
We must ascertain the masses of the sucrose and the total solution in order to calculate the mass percent of a sucrose solution. The following formula can be used: (Mass of Solute - Mass of Solution) / 100% = mass percent where the mass of the solution is the sum of the mass of the solute (sucrose) and the mass of the water. We must first calculate the sucrose's mass: Sucrose has a mass of 3.950 g. The total mass of the solution must then be determined: mass of solution = 20.6 g. We may now get the mass percent using the following formula: 19.17% is the mass percentage (3.950 g x 20.6 g) x 100%. The sucrose solution's mass percentage is 19.17% as a result.
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A system containing 1 atm of an ideal gas is doubled in temperature and halved in volume. What is the new pressure? a. 2 atm b. 1 atm c. 0.5 atm d. 4 atm
A system containing 1 atm of an ideal gas is doubled in temperature and halved in volume, and then the new pressure is 4 atm. Thus, d is the correct option.
The gas law equation to find out the new pressure is as follows:
P₂ V₂ / T₂ = P₁ V₁ / T₁
Where,
The initial pressure, P₁ = 1 atm
The initial volume, V₁ = V₁
the initial temperature = T₁
The final pressure P₂ =?
The final volume is given as, V₂ = V₁/ 2
The final temperature, T₂ = 2T₁
P₁ V₁ / T₁ = (P₂ V₁/ 2 ) / 2T₁
P₂ = 4 atm
Thus, the new pressure is 4 atm.
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When heating this reaction mixture at reflux, the reaction temperature will be maintained at approximately. A. 25C B. 65C C.100C D. 125C
The reaction temperature at reflux will typically be lower than 100°C.
The boiling point of the reaction mixture is determined by the vapor pressure of the components present in the reaction mixture. As such, the temperature of the reaction mixture at reflux will depend on the boiling point of the components present in the reaction mixture. Generally, the boiling point of a reaction mixture is lower than the boiling point of its components, so the reaction temperature at reflux will be lower than the boiling point of the components. Therefore, the reaction temperature at reflux will typically be lower than 100°C.
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9) For the following balanced equation, NH3(g) + HCl(g) → NH4Cl(s)
how many moles of the product could be produced by complete reaction of 1.00g of ammonia?
For the equation, 0.059 moles of NH₄Cl can be produced to complete the reaction.
How to calculate moles?In order to determine how many moles of the product, NH₄Cl, can be produced by the complete reaction of 1.00g of ammonia, we can use the balanced chemical equation. According to the equation, 1 mole of NH3 reacts with 1 mole of HCl to produce 1 mole of NH₄Cl.
Thus, if we have 1.00g of NH₃, we can calculate the number of moles by using the molar mass of NH₃:
1.00g NH₃ / 17.0 g/mol = 0.059 moles NH₃
So, if we have 0.059 moles of NH₃, we can produce 0.059 moles of NH₄Cl.
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determine the quantum numbers for the outermost three electrons for an atom of aluminum starting with the innermost electron of the three.
Set of quantum numbers (n,l,m,s) for the outer most shell of aluminum atom is (3,1,-1,+1/2)
Given outermost electron of aluminium,
The electronic configuration of aluminium is 1s², 2s², 2p⁶,3s², 3p¹
The outermost electron will have the configuration 3p¹;
3p¹ ⇒ n = 3, l = 1 (p), ml = -1 (px orbital), s = +1/2;
Therefore we know that the,
⇒ Set of quantum numbers = (3, 1, -1, +1/2)
and as we know the value of m lies between -l and +l
As we know, therefore we get the values of,
n = 3,
l = 1,
m = -1 and
s = +1/2
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what level of protein structure describes the spatial location of every atom in a protein?
a. 4˚
b. 2˚
c. 1˚
d. 3˚
Draw the structure of cis−jasmone, a natural product isolated from jasmine flowers, formed by treatment of alkyne a with h2 in the presence of the lindlar catalyst. click the "draw structure" button to launch the drawing utility?
The structure of cis-jasmone is a cyclic alkene with a carbonyl functional group.The molecule has a ring structure with alternating double bonds and single bonds, and it contains a carbon-carbon double bond that is in the "cis" configuration, hence the name "cis-jasmone."
Cis-jasmone is a natural product isolated from jasmine flowers, formed by the treatment of an alkyne with hydrogen gas in the presence of a Lindlar catalyst. The presence of the carbonyl functional group in the molecule gives it a characteristic aroma, which is associated with the fragrance of jasmine flowers.
The process of forming cis-jasmone from an alkyne involves the addition of hydrogen gas to the alkyne in the presence of a Lindlar catalyst. The Lindlar catalyst is a type of heterogeneous catalyst that is commonly used in the hydrogenation of alkenes and alkynes. The hydrogenation process results in the conversion of the alkyne into a trans-alkene or a cis-alkene, depending on the reaction conditions and the type of catalyst used. In the case of cis-jasmone, the reaction conditions and the use of the Lindlar catalyst result in the formation of a cis-alkene.
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what percentage of worldwide deaths due to indoor air pollution occurs in developing nations? 50 percent 60 percent 70 percent 90 percent which outdoor air pollutant is also a significant indoor air pollutant? sulfur dioxide nitrogen oxides carbon monoxide lead
The indoor air is found to be more harmful than the outdoor air. The death rate percentage due to the indoor air pollution is 50%. Both sulfur dioxide and nitrogen oxides are outdoor-indoor air pollutant.
What is indoor air pollution?The pollution which is caused from the dust, dirt or gases inside the home or workplace which is harmful to breathe in is defined as the indoor air pollution. The poor quality of air can cause diseases like stroke, cancer, asthma, etc.
About 50 % of the population is died due to indoor air pollution. The pollutants like NOₓ, SO₂, O₃ are indoor and outdoor air pollutants.
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i actually have no clue
which shows the balanced equation for the reaction of nitrogen (picture), as it is normally found in our atmosphere, with oxygen (picture), as it is normally found in our atmosphere, to form nitrogen dioxide?
The balanced equation for the nitrogen-oxygen process that produces nitrogen dioxide is: 2NO + O2 -> 2NO2. According to this equation, one molecule of oxygen (O2) and two molecules of nitrogen dioxide (NO) react to form nitrogen dioxide (NO2).
The definition of a balanced equation in chemistry is a chemical equation where the number of atoms of each element in the reactants and products is the same. Because it appropriately depicts the reactants, products, and stoichiometric ratios involved in a chemical reaction, a balanced equation is significant. Additionally, it enables the estimation of a reaction's conclusion as well as the calculation of the amounts of reactants and products involved in a reaction. In order to ensure that each element has the same amount of atoms on both sides of the equation, the coefficients of the reactants and products must be changed.
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Which of these ions is most likely to be leached from the soil?
a. magnesium ions,
b. chlorine ions,
c. calcium ions,
d. iron ions
e. potassium ions
which set of three quantum numbers does not specify an orbital in the hydrogen atom?
any set of quantum numbers that violate the rules for the allowed values of n, l, and m_l will not specify a valid orbital in the hydrogen atom.
The trio of quantum numbers n = 3, l = 3, and m l = -2 do not identify an orbital in the hydrogen atom.
This is because l = 3 is an invalid quantum number for n = 3, as the value of l cannot be bigger than n-1. When n = 3, the permitted values of l are 0, 1, and 2. As m l has a value between -l and +l, the quantum number m l = -2 is acceptable for l = 2 but not for l = 3.
In summary, any set of quantum numbers that violate the rules for the allowed values of n, l, and m_l will not specify a valid orbital in the hydrogen atom.
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if the percentage of oxygen (by mass) in an unknown compound is 35.53% and there are 4 atoms per molecule. what is the molar mass of the unknown compound
Molar mass, which is measured in grammes per mole units, is the mass of one mole of a substance. The unknown compound's molar mass is 226.2 g/mol plus the molar masses of any additional elements it may contain.
We can first calculate the mass of the oxygen in one mole of the chemical to obtain the molar mass of the unknown compound: The chemical has 35.53 g of oxygen per mole. Oxygen has an atomic mass of 16.00 g/mol. As a result, there are 2.2206 moles of oxygen in a mole of the molecule, or 35.53 g / 16.00 g/mol. As there are 4 atoms per molecule, the following formula can be used to determine the molar mass of the unknown compound: Molar mass = (35.53 g + molar mass of other elements) / 2.2206 mol * 4 atoms/molecule. Molar mass = (35.53 g / 2.2206 mol * 4) + molar mass of other elements is the result of solving for the molar mass of the unidentified substance. Molar mass is equal to 226.2 g/mol plus the molar mass of other elements. Therefore, The unknown compound's molar mass is 226.2 g/mol plus the molar masses of any additional elements it may contain.
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which of the following is true in general of all cations? group of answer choices a cation has equal numbers of protons and electrons. a cation has fewer protons than electrons. a cation has more protons than electrons. a cation has more protons than neutrons.
Cation has more protons than electrons.
What traits do cations possess?
An ion with positive charge is referred to as a cation because it has more protons than electrons (negatively-charged particles). When an atom loses one or more electrons, cations are created because the total charge of the atom becomes positive due to the loss of the negatively charged electron(s).
If an atom loses one of its electrons, the atom will now have more protons than neutrons and will thus be positively charged. The ratio of electrons to protons will alter significantly upon the formation of a cation. Protons will outnumber electrons in number. No matter what kind of cations are created, the connection between protons and electrons remains the same.
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how many moles of calcium in 0.5 mole ca3(po4)2
There are 1.5 moles of calcium in 0.5 mole Ca3(PO4)2.
How to determine the number of moles of calcium in 0.5 mole Ca3(PO4)2First we need to first find the molar mass of Ca3(PO4)2:
Molar mass of Ca3(PO4)2 = (3 x molar mass of Ca) + (2 x molar mass of PO4)
= (3 x 40.08 g/mol) + (2 x (1 x 30.97 g/mol + 4 x 16.00 g/mol))
= 310.18 g/mol
Next, we can use the following mole ratio:
3 moles of Ca / 1 mole of Ca3(PO4)2
This means that for every 1 mole of Ca3(PO4)2, there are 3 moles of Ca.
Therefore, the number of moles of calcium in 0.5 mole Ca3(PO4)2 is:
0.5 mole Ca3(PO4)2 x (3 moles of Ca / 1 mole of Ca3(PO4)2) = 1.5 moles of Ca
Therefore, there are 1.5 moles of calcium in 0.5 mole Ca3(PO4)2.
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When 300 grams of water cools from 50. °C to 25°C, the total amount of heat energy released by the water is?
The total amount of heat energy released by the water is 31,350 J.
What is heat capacity?Heat capacity is a physical property of a substance that describes how much heat energy is required to raise the temperature of the substance by a certain amount.
The amount of heat energy released by the water can be calculated using the specific heat capacity of water and the change in temperature:
Q = m × c × ΔT
where Q is the amount of heat energy released, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.
For water, the specific heat capacity is approximately 4.18 J/(g°C).
So, plugging in the values:
Q = 300 g × 4.18 J/(g°C) × (50°C - 25°C)
Q = 300 g × 4.18 J/(g°C) × 25°C
Q = 31,350 J
Therefore, the total amount of heat energy released by the water is 31,350 J.
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Which event will increase the amount of carbon dioxide in the atmosphere?
a. burning fossil fuels
b. increased wind power
c. decreased population
d. decreasing habitats
Draw the structure of cis-jasmone, a natural product isolated from jasmine flowers, formed by treatment of alkyne A with H2, in the presence of the Lindlar catalyst. Click the "draw structure" button to launch the drawing utility.
The resulting product is cis-jasmone, which has the following structure:
H
|
CH3-CH-CH=CH-CH=O
|
CHO
The synthesis of cis-jasmone involves the hydrogenation of an alkyne in the presence of a Lindlar catalyst. Specifically, alkyne A is treated with hydrogen gas (H2) and a Lindlar catalyst, which is a type of palladium catalyst that selectively hydrogenates alkynes to cis-alkenes. The reaction conditions prevent complete reduction of the alkyne to an alkane. The molecule has a six-carbon ring with a double bond between carbons 2 and 3 and a carbonyl group (C=O) attached to carbon 6. The two methyl groups attached to carbons 1 and 2 are both on the same side of the ring, giving the molecule a cis configuration.
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histidine is an important amino acid with an aromatic side chain that contains two nitrogens. which nitrogen do you think would get protonated in acid
In an acidic environment, the nitrogen of the histidine side chain that is most likely to get protonated is the amino group nitrogen (NH2).
In the case of histidine, the two nitrogens in the side chain are referred to as the imidazole ring. The imidazole ring contains a pyridine-like structure with two nitrogen atoms, one of which is in the form of an amino group (NH2) and the other in the form of a pyrrole-like nitrogen (N).
In an acidic environment, the pH is low, and there are excess protons (H+) available. which means it would accept a hydrogen ion (H+) to become NH3+. This is because the amino group has a lone pair of electrons that can accept the proton, while the pyrrole-like nitrogen does not have a lone pair available for protonation.
Therefore, in an acidic environment, the nitrogen of the histidine side chain that is most likely to get protonated is the amino group nitrogen (NH2).
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A 214 kg boat is sinking in the ocean. The force of gravity that draws the boat down is partially offset by the buoyant force of the water, so the net unbalanced force on the boat is -1310 N. What is the acceleration of the boat?
Answer:
force divided by massExplanation:
as force is mass multiplied by accelaration so if we divide force by mass we will get accelaration
The excess reagent that results from a chemical reaction is measured in:
moles?
liters?
moles/mass of the reagent?
grams?
which of the above
Answer:booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga booga ooga ooga booga ooga gaagga googa booga
Explanation: its moles
dissociation of(NH4)2SO4 and hydrolysis
Dissociation of (NH4)2SO4 refers to the process by which ammonium sulfate ionizes in aqueous solution to produce ions.
Hydrolysis, on the other hand, is a chemical reaction in which water reacts with a substance to produce new molecules.
What is the reaction of the dissociation of(NH4)2SO4?Ammonium sulfate is a salt that consists of two ammonium ions (NH4+) and one sulfate ion (SO4^2-). In water, the ionic bonds in ammonium sulfate break apart and the ions become hydrated, meaning they are surrounded by water molecules.
The equation for the dissociation of ammonium sulfate in water is shown below:
(NH4)2SO4 + H2O ⇒ 2NH4+ + SO4^2-
Hydrolysis
In the context of ammonium sulfate, hydrolysis refers to the reaction between the ammonium ion (NH4+) and the hydroxide ion (OH-) to produce a new molecule.
The equation for the hydrolysis of ammonium sulfate in water is shown below:
NH4+ + OH- -> NH3 + H2O
It's important to note that while dissociation and hydrolysis both involve the reaction of a substance with water, they produce different products and have different effects on the substance. Dissociation leads to the formation of ions, while hydrolysis leads to the formation of new molecules.
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When solid ammonium chloride is added to water, all of the solid dissolves and the solution becomes cold.
a. True
b. False
True. When solid ammonium chloride is put to water, it dissolves quickly and undergoes an endothermic reaction, meaning that heat from the environment is absorbed, cooling the solution.
A salt with no flavour or scent, ammonium chloride has a number of uses. It is frequently used in fertilisers, as an animal feed addition, and in several medical procedures. Ammonium chloride, often known as NH4Cl, is a chemical compound made up of ammonium ions (NH4+) and chloride ions (Cl-). Water rapidly dissolves ammonium chloride when it is introduced, releasing ammonium and chloride ions into the solution. Because of the endothermic nature of this process, the solution cools down as a result of heat being absorbed from the surroundings. This quality is frequently applied in cooling applications, such as cold packs.
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what is the formula for the compound tetraphosphorus decoxide?
Answer:
The formula for tetraphosphorus decoxide is P4O10.
Explanation:
What is the stoichiometric ratio between the mg band reactant and the hydrogen gas product, in the reaction used to determine the molar volume of the gas?
The stoicheometric ratio between the magnesium reactant and the hydrogen product is 1:1. This means that for every mole of magnesium that reacts, one mole of hydrogen gas is produced.
The reaction used to determine the molar volume of a gas is typically the reaction between magnesium (Mg) and hydrochloric acid (HCl) , which produces magnesium chloride and hydrogen gas.
The balanced chemical reaction is:-
[tex]Mg + 2HCl ---- > MgCl_{2} + H_{2}[/tex]
The molar volume of a gas is defined as the volume occupied by one mole of the gas at a specific temperature and pressure.
To determine the molar volume of the gas we need to measure the volume of the gas under known temperature and pressure conditions.
The formula to calculate the molar volume of the gas is:-
[tex]V_{m} = v/n[/tex] ( where, v is the volume of the gas and n is the number of moles of the gas).
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what is a correct set of quantum numbers for an electron in the 3p orbital? fill in the blanks with a whole number no decimals n
[tex]\begin{equation}\mathrm{n}=3, \rho=1, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex] is a correct set of quantum numbers for an electron in the 3p orbital, with a whole number no decimals n.
The quantum state of an electron in an atom or molecule is determined by four separate elements known as quantum numbers. With the use of these numbers, it is possible to forecast the energy, location, and orientation of the electrons within an atom. The orbital's size is defined by the electron's principal quantum number, n, which also serves as an energy level indicator. The azimuthal quantum number, l, describes the geometry of the orbital, while the magnetic quantum number, ml, determines its direction in space. An electron's spin is defined by its spin quantum number, or ms. These illustrations are crucial for understanding atomic and molecular properties since they collectively give a full explanation of the electron.
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The actual question is:
Fill in the blanks,
__________________ is a correct set of quantum numbers for an electron in the 3p orbital, with a whole number no decimals n
A) [tex]\begin{equation}\mathrm{n}=3, \rho=1, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
B) [tex]\begin{equation}\mathrm{n}=3, \rho=2, \mathrm{m_e}=-2,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
C) [tex]\begin{equation}\mathrm{n}=2, \rho=2, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
D) [tex]\begin{equation}\mathrm{n}=2, \rho=3, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
Validity,Reliability and Accuracy through the process of separating iron filings, sand and salt from the mixture
Validity, Reliability and Accuracy are used in the following ways:
How important are Validity, Reliability and Accuracy in separating iron filings?
Validity refers to whether the process of separating iron filings, sand, and salt actually measures what it is intended to measure. In this case, the process is intended to measure the ability to separate the three substances from each other, so as long as the process accurately reflects this ability, it can be considered valid.Reliability refers to whether the process can be consistently replicated with similar results. If the process is carried out by different individuals or at different times, it should still lead to the same outcome. In the case of separating iron filings, sand, and salt, if the same process is used with the same materials, it should result in the same outcome every time.Accuracy refers to how closely the results of the process reflect the true values or qualities of the substances being separated. In this case, the accuracy of the process will depend on whether all of the iron filings, sand, and salt have been completely separated from each other, and whether the amounts of each substance are accurately measured after the separation is complete.
Overall, to ensure validity, reliability, and accuracy when separating iron filings, sand, and salt from a mixture, it is important to follow a standardized and consistent process, use appropriate materials and equipment, and accurately measure and record the amounts of each substance before and after separation.
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an empty graduated cylinder has a mass of 31.780g. then, 50.0ml of an unknown liquid are added and the mass increases to 72.810g. what is the density of the unknown liquid? your answer should be a number plus unit no space, the unit should be in abbreviated form like shown in the question.
If an empty graduated cylinder has a mass of 31.780g. then, 50.0ml of an unknown liquid are added and the mass increases to 72.810g. then the density of the unknown liquid is 0.8206 g/cc.
We must use the following formula to determine the density of the unidentified liquid:
density equals mass/volume
The mass of the liquid that has been added to the graduated cylinder must first be ascertained. We may achieve this by deducting the mass of the liquid-filled cylinder from the mass of the empty cylinder:
Mass of liquid equals mass of cylinder with liquid minus mass of cylinder with no liquid.
liquid mass = 72.810 g - 31.780 g
liquid mass is 41.030 g.
The volume of the liquid added, which is 50.0 mL, may then be calculated.
We can now enter these values into the density formula as follows:
The formula for density is mass/volume: 41.030 g/50 mL.
Since 1 millilitre (mL) equals 1 cubic centimetre (cc), we can simplify the units by converting to 1 cc:
densities equal 41.030 g per 50.0 cc
We can finally determine the density:
0.8206 g/cc is the density.
As a result, the unknown liquid has a density of 0.8206 g/cc.
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