Answers
Explanation:
To determine the number of molecules of oxygen in the reactants, we need to look at the coefficient of O2 in the balanced chemical equation.
In this case, the coefficient is 45, which means that for every one molecule of O2, we need 45 molecules of O2 to react with the 3 molecules of C10H22O. Therefore, the total number of molecules of O2 in the reactants is:
45 molecules O2/mol x 3 mol C10H22O = 135 molecules of O2
So, there are 135 molecules of O2 in the reactants.
Related Questions
The pH at the Half-equivalence point of a weak base - strong acid tritation is:
A. Equal to pka
B. Equal to pKb
C. Less than 7.0
D. Equal to 7.0
E. Greater than 7.0
Answers
Answer:
Less than 7
Explanation:
during the titration of strong acid and weak base, the weak base is usually kept in the flask and strong acid is kept in the burette. So when we add strong acid slowly drop by drop, slowly the pH level of solution starts to decrease and at equivalence point the acid overpowers the base as a strong acid was taken over a weak base.
a sample of ground beef contains 18.9% protein and 21.4% fat both by mass. how many kilocalories are in 125g of the ground beef? assume all kilocalories come from, protein and fat, and that the sample contains only protein, fat, and water
Answers
A sample of ground beef contains 18.9% protein and 21.4% fat both by mass. Therefore, 147.5kilocalories are in 125g of the ground beef.
What is calories?The calorie is an energy unit derived from the now-defunct thermodynamic theory of heat. Two primary meanings of "calorie" are widely used for historical reasons.
Originally, a big calorie, meal calorie, dietary calorie, and kilo calorie was defined as the quantity of heat required to increase the temperature with one kilogram of water through one degrees Centigrade (or one kelvin). The amount of heat required to create the same rise in one gram of water was characterized as a tiny calorie or gram calorie.
Let the required calorie of ground beef be m .
protein in it = .18m
fat in it = .21m
1 gram of protein gives 4 cals .
1 gram of fat gives 9 cals .
4 x .18m + 9 x .21m = 350
m = 147.5kilocalories
Therefore, 147.5kilocalories are in 125g of the ground beef.
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it is difficult to cut the steam of water
Answers
It is difficult to cut the steam of water because of the unique properties of water and steam.Water and steam are two different states of matter, but they have a common property - they are both molecules of H2O. Steam is formed when water is heated, and the molecules of H2O begin to move faster and further apart from one another.
This results in steam, which is a gas and not a liquid like water. It is more challenging to cut the steam of water than the liquid water due to its unique properties.Therefore, the difficulty of cutting steam of water is due to the following properties of steam:Low density: Steam has low density because of the increased space between the water molecules due to heating. This means that steam takes up more space and is lighter than water, making it difficult to cut or separate from the atmosphere.Gaseous state: Steam is a gaseous state, which means it does not have a definite shape or volume like liquid water. Therefore, cutting steam would be difficult as it does not have a defined structure. Moreover, steam would disperse instantly if it is cut due to its gaseous form and become difficult to capture.Very hot: Steam is at a temperature that is harmful to human skin, and can cause severe burns. This means that cutting steam is also a safety concern, which makes the process even more challenging.For such more question on molecules
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How many water molecules are found within the crystalline structure of one hydrate molecule?
What is the molecular formula of the hydrate?
Attached my worksheets to it and the questions
Answers
a. The Mass of water driven off = 0.15 g
b. Moles of anhydrate = 0.00257 moles
c. Moles of water driven off is 0.00833 moles
d. There are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.
e. The molecular formula of the hydrated salt will be X.3H₂O
What is the mass of water driven off from the hydrated salt?a. The mass of water driven off from the hydrated salt is:
Mass of water driven off = 0.5 g - 0.35 g
Mass of water driven off = 0.15 g
b. Molecular mass of salt = 136 g/mol
moles of anhydrate = 0.35/136
Moles of anhydrate = 0.00257 moles
c. Moles of water driven off = mass/molar mass
molar mass of water = 18 g/mol
Moles of water driven off = 0.15/18
Moles of water driven off = 0.00833 moles
d. Moles of water within the crystalline structure of one molecule of the hydrated salt is determined by converting to whole number mole ratio by dividing with the smallest ratio,
Salt to water ratio = 0.00257 /0.00257 : 0.00833/0.00257
Salt to water ratio = 1 : 3
Therefore, there are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.
e. Assuming the anhydrous salt is X, the molecular formula of the hydrated salt will be X.3H₂O
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2.
Which mixture could be a useful buffer in a solution?
acetic acid (CH3CO2H) and hydrochloric acid (HCl)
sodium hydroxide (NaOH) and elemental sodium (Na)
ammonia (NH3) and ammonium chloride (NH4Cl)
acetic acid (CH3CO2H) and ammonia (NH3)
Pls answer quickly
Answers
Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C
A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.
In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.
Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.
Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.
Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).
The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.
Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.
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Balance the equations below (if no coefficient is needed, choose "1" from the options)
1.__K(s) +__ Cl2(g) →__KCI(s)
2. __NH3(g)→__N2(g) +__ H2(g)
3. __Ag(NO3) (aq) +__CaCl2(aq) →__AGCL(s) + __Ca(NO3)2(aq)
4. __CH4(g)+__O₂(g) → __CO2(g)+ __H₂0(g)
Answers
Answer:
1. 2K(s) + Cl2(g) → 2KCI(s)
2. 4NH3(g) → 2N2(g) + 6H2(g)
3. 2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq)
4. CH4(g) + 2O₂(g) → CO2(g) + 2H₂0(g)
How many hydrogen ions (H+) are in a mole?
Answers
Aluminum chloride is decomposed to form pure aluminum and chlorine gas assuming that 10.0 g of was used for this reaction how many grams of chlorine and aluminum will be formed? Assume that a student did this reaction and got only 1.2 grams of aluminum what was this students percent yield?
Answers
1. The mass of chlorine formed can be obtain as follow:
2AlCl₃ -> 2Al + 3Cl₂
Molar mass of AlCl₃ = 133.5 g/molMass of AlCl₃ from the balanced equation = 2 × 133.5 = 267 g Molar mass of Cl₂ = 71 g/molMass of Cl₂ from the balanced equation = 3 × 71 = 213 gFrom the balanced equation above,
267 g of AlCl₃ decomposed to produce 213 g of Cl₂
Therefore,
10 g of AlCl₃ will decompose to produce = (10 × 213) / 267 = 7.98 g of Cl₂
Thus, the mass of chlorine formed is 7.98 g
2. The mass of aluminium formed can be obtain as follow:
2AlCl₃ -> 2Al + 3Cl₂
Molar mass of AlCl₃ = 133.5 g/molMass of AlCl₃ from the balanced equation = 2 × 133.5 = 267 g Molar mass of Al = 27 g/molMass of Al from the balanced equation = 2 × 27 = 54 gFrom the balanced equation above,
267 g of AlCl₃ decomposed to produce 54 g of Al
Therefore,
10 g of AlCl₃ will decompose to produce = (10 × 54) / 267 = 2.02 g of Al
Thus, the mass of aluminum formed is 2.02 g
How do i determine the percentage yield?The percentage yield of aluminum formed can be obtain as follow:
Actual yield of aluminum = 1.2 gTheoretical yield of aluminum = 2.02 gPercentage yield of aluminum =?Percentage yield = (Actual /Theoretical) × 100
Percentage yield of aluminum = (1.2 / 2.02) × 100
Percentage yield of aluminum = 59.4%
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A molecule with the formula AB2 has a linear molecular geometry. Which of the following could represent the hybridization of the central atom?
Answers
In a molecule with the formula AB2, the hybridization of the central atom is typically sp hybridization. This type of hybridization allows for the formation of two single bonds in opposite directions, which gives the molecule its linear molecular geometry.
A molecule with the formula AB2, such as carbon dioxide (CO2), is an example of a linear molecular geometry. In this type of molecule, the central atom is bonded to two other atoms, forming a straight line. The hybridization of the central atom, which is the process of mixing different types of atomic orbitals to form new hybrid orbitals, is determined by the number and types of bonds formed with the atoms around it.
In a molecule with the formula AB2, the hybridization of the central atom is typically sp hybridization. This is because there are two single bonds formed with two different atoms, which would require the combination of one s orbital and one p orbital. The s orbital is used to form the sigma bond between the central atom and the two other atoms, while the p orbital is used to form the two pi bonds.
The sp hybridization of the central atom also allows the molecule to have a linear molecular geometry. This is because the two single bonds formed by the sp hybrid orbitals are in opposite directions and create a straight line, giving the molecule its linear shape.
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Your friend says that since you can see objects such as grass and flowers, they must be emitting light in the visible light range. Is your friend correct? Why or why not?
Answers
Answer:
no cause ther arent emmiting light but they are reflecting light
Explanation:
Yeah I think I did it wrong before, the one above is correct
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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Nitrous oxide (N2O), more commonly known as laughing gas, is used as a mild sedatitive during various dental procedures.As a gas, it has a densityof 1.977 x 10-3g/mL.Wheniron is exposed to oxygen it forms rust (Fe2O3), which is a solid and has a density value of 5.25 g/mL.Why are the density values so different among these substances?
a)The metal atoms weigh more than the atoms of the gas.
b)The metal forms metallic bonds which are more greatly affected by gravity, increasing the mass.
c)The metal is a solid, and solids weigh more based on the principles of their states of matter.
d)There are fewer gas particles than solid particles in the same volume.
Answers
Answer:
B.
Explanation:
The metal forms metallic bonds which are more greatly affected by gravity, increasing the mass.
2. What are the factors that influence the two types of energy?
Answers
Answer:
It depends on the objects mass, the gravitational pull when up or down slopes, and the height of the reference point
If a molecule has a triple bond, what can be assumed about the bond compared to a molecule with a double bond?
The length is more than a double bond
The strength is more than a double bond
The strength is less than a double bond
The length is the same as a double bond
Answers
While the length is less than a double bond, the strength exceeds that of a double bond.
Within the same molecule, how do triple bonds differ from double bonds?Due to the presence of two bonds rather than one, triple bonds are stronger than double bonds. An sp-sp sigma bond is created when one of each carbon atom's two sp hybrid orbitals intersects with the corresponding orbital from the other carbon atom.
Compared to double bonds, are triple bonds more durable and longer?Six electrons are shared by a sigma bond, two bonds, and a triple bond. Double bonds are more powerful than single bonds, and triple bonds are more powerful than double bonds, according to experiments.
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Answer: third
Explanation:
Preview the following chart and identify the text structure used to summarize:
Cow is infected from feed
Cow dies
Cow becomes feed for other cows
Other cows become infected from eating BSE in feed
a.
sequencing
c.
problem/solution
b.
cause/effect
d.
fact/opinion
Answers
Answer:
A or B, but I think B would be the safer option.
Explanation:
In an ecosystem, the following chart of cows depicts cause or effect of the text structure.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other by means of nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems present.
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At 20°C the vapor pressure of benzene (C6H6) is 75 torr, and that of toluene (C7H8) is 22 torr. Assume that benzene and toluene form an ideal solution. What is the composition in mole fractions of a solution that has a vapor pressure of 40. torr at 20°C?
Answers
Answer: The mole fraction of benzene will be 0.34 and mole fraction of toluene is 0.66
Explanation:
According to Raoult's law, the vapor pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the vapor pressure of that component in the pure state.
\(p_1=x_1p_1^0\) and \(p_2=x_2P_2^0\)
where, x = mole fraction in solution
\(p^0\) = pressure in the pure state
According to Dalton's law, the total pressure is the sum of individual pressures.
\(p_{total}=p_1+p_2\\\)\(p_{total}=x_{benzene}p_{benzene}^0+x_{toluene}P_{toluene}^0\)
\(x_{benzene}=x\),
\(x_{toluene}=1-x_{benzene}=1-x\),
\(p_{benzene}^0=75torr\)
\(p_{toluene}^0=22torr\)
\(p_{total}=40torr\)
\(40=x\times 75+(1-x)\times 22\)
\(x=0.34\)
Thus (1-x0 = (1-0.34)=0.66
Thus the mole fraction of benzene will be 0.34 and that of toluene is 0.66
Which of these will cause the greatest pH change in the blood? Select one: O a. 1.2x10*M solution of HI Ob. 1.2x105M solution of HI O c. 1.2x10-'M solution of HI O d. 2x10-M solution of HI
Answers
1.2x10*M solution of HI O will cause the greatest pH change in the blood. In chemistry, pH, historically denoting "potential of hydrogen", is a scale used to specify the acidity or basicity of an aqueous solution.
What is pH?
In chemistry, pH, which historically stands for "hydrogen potential," is a measure used to indicate the acidity or basicity of an aqueous solution. Acidic solutions measured lower pH values than either basic or alkaline solutions.
Therefore, 1.2x10*M solution of HI O will cause the greatest pH change in the blood. In chemistry, pH, historically denoting "potential of hydrogen", is a scale used to specify the acidity or basicity of an aqueous solution.
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PLEASE HELPPP ME
Use the following balanced chemcial equation to answer the question below.
CaBr2 + Na2SO4 --> CaSO4 + 2NaBr
1. How many moles of sodium bromide can be made from 5 moles of calcium bromide
2. How many grams of calcium sulfate will be made from 2.00 moles of calcium bromide
3. How many grams of calcium bromide will be needed to make 845 grams of calcium sulfate
Answers
Answer:
1) (5 moles of calcium bromide) x 2 / 1 = 10 moles
2) (2.00 moles of calcium bromide) = 2.00 moles of calcium sulfate
so (2.00) x (136.1 g/mol) = 272.2 g
3) (845 grams of calcium sulfate) / 136.14 g/mol = 6.21 moles
6.21 moles of calcium sulfate = 6.21 moles of calcium bromide
(6.21 moles of calcium bromide) x 199.89 g/mol = 1241.32 g
The following two organic compounds are structural isomers to each other. Carefully identify and justify the structural isomers type (skeletal, functional, or positional) with their common molecular formula
Answers
Structural isomers are molecules with the same molecular formula but with different structural formulae. This means that they have the same number and types of atoms, but they are arranged differently. The following two organic compounds are structural isomers of each other.
Carefully identify and justify the structural isomers type (skeletal, functional, or positional) with their common molecular formula.Common molecular formula: C6H14Structural isomers:(i) Hexane: Hexane is a straight-chain alkane with six carbon atoms and no double bonds or rings. The carbon atoms are linked together in a linear or straight-chain configuration in the skeletal isomer. The skeletal isomer differs in terms of the arrangement of atoms in its molecule. This indicates that it is a skeletal isomer.(ii) 2-methylpentane: It is a branched-chain alkane with six carbon atoms and no double bonds or rings. It differs from the first molecule in terms of the location of a methyl group on the second carbon of the five-carbon chain, rather than a straight six-carbon chain. This difference is due to a change in the positioning of the carbon atoms in the molecule. As a result, it is a positional isomer, as it differs by the position of the functional group or substituent. Therefore, the skeletal and positional isomerism types are present between these two compounds.For such more question on molecular
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Determine the volume in mL of 0.242 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 46.79 mL of 0.204 M propanoic acid(aq). The Ka of propanoic acid is 1.3 x 10-5.
Answers
The volume (in mL) of 0.242 M NaOH solution needed for the titration reaction is 39.44 mL
Balanced equationCH₃CH₂COOH + NaOH —> CH₃CH₂COONa + H₂O
From the balanced equation above,
The mole ratio of the acid, CH₃CH₂COOH (nA) = 1The mole ratio of the base, NaOH (nB) = 1How to determine the volume of NaOHVolume of acid, CH₃CH₂COOH (Va) = 46.79 mL Molarity of acid, CH₃CH₂COOH (Ma) = 0.204 MMolarity of base, NaOH (Mb) = 0.242 MVolume of base, KOH (Vb) =?MaVa / MbVb = nA / nB
(0.204 × 46.79) / (0.242 × Vb) = 1
Cross multiply
0.242 × Vb = 0.204 × 46.79
Divide both side by 0.242
Vb = (0.204 × 46.79) / 0.242
Vb = 39.44 mL
Thus, the volume of NaOH needed for the reaction is 39.44 mL
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In a laboratory experiment a student found the pH of rain rain water sample to be 4.35 calculate H3O+ in the rainwater
Answers
The rainwater sample has a pH of 4.35, indicating that it is acidic. The concentration of \(H_3O^+\) ions in the sample is \(4.47 * 10^{-5} M\), which is higher than in neutral or basic solutions.
In a laboratory experiment, a student found the pH of a rainwater sample to be 4.35. In this context, the task is to calculate the concentration of hydronium ions (\(H_3O^+\)) in the given rainwater sample. The pH of the rainwater sample is an indication of how acidic it is. As per the pH scale, acidic solutions have a pH of less than 7. Since the pH of rainwater is acidic (pH = 4.35), it means that the concentration of \(H_3O^+\) ions is higher in the rainwater sample. To calculate the concentration of \(H_3O^+\) ions, we can use the following formula: pH = -log[\(H_3O^+\)], Where[\(H_3O^+\)] is the concentration of hydronium ions. By rearranging the above formula, we can get the concentration of \(H_3O^+\) ions as \([H_3O^+] = 10^{-pH}\). Substituting the given pH value of the rainwater sample in the above equation, we get\([H_3O^+] = 10^{-4.35} = 4.47 × 10^{-5} M.\)Therefore, the concentration of \(H_3O^+\) ions in the given rainwater sample is \(4.47 * 10^{-5} M.\)For more questions on acidic
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a blank can be seen when a substance change into a new substance
Answers
As per chemical changes, a color change can be seen when a substance change into a new substance.
Chemical changes are defined as changes which occur when a substance combines with another substance to form a complete new substance.Alternatively, when a substance breaks down or decomposes to give new substance it is also considered to be a chemical change.
There are several characteristics of chemical changes like those of change in color, change in state , change in odor and even change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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How many formula units make up 36.2 g of magnesium chloride (MgCl2)?
Answers
Answer:
2.29 × 10²³ formula units of MgCl₂
Explanation:
Given data:
Mass of MgCl₂ = 36.2 g
Number of formula units = ?
Solution:
The given problem will be solved by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water = 6.022 × 10²³ formula units of water.
In 36.2 g of MgCl₂:
Number of moles = mass / molar mass
Number of moles = 36.2 g / 95.211 g/mol
Number of moles = 0.38 mol
1 mole = 6.022 × 10²³ formula units
0.38 mol / 1mol × 6.022 × 10²³ formula units
2.29 × 10²³ formula units of MgCl₂
balance the equation
Answers
The balanced form of the chemical equations given in the image are as follows:
Cu + 2H₂SO₄ → CuSO₄ + SO₂ + 2H₂O4Al + 3O₂ → 2Al₂O₃2Fe + 3Cl₂ → 2FeCl₃2C₂H₆ + 7O₂ → 4CO₂ + 6H₂OAl₂O₃ + 2NaOH + 3H₂O → 2Na(Al(OH)₄)Cu + 4HNO₃ → CU(NO₃)₂ + 2NO₂ + 2H₂O2F₂ + 2KOH → 2KF + F₂O + H₂OWhat is a balanced equation?A balanced chemical equation is an equation that obeys the law of conservation of mass i.e. the number of atoms of each element on both sides of the equation are the same.
A chemical equation is balanced with the aid of coefficients, which are numbers placed in front of each compound or element as a multiplying factor.
According to this question, some chemical equations were given in the image attached. The balanced form of these equations are in the main answer part.
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List all possible values of the magnetic quantum number ml for a 1s electron.
Answers
The magnetic quantum number (ml) represents the orientation of the orbital in three-dimensional space the only possible value of the magnetic quantum number ml for a 1s electron is 0.
What is a quantum ?Quantum is the smallest possible unit of a physical quantity, such as energy or momentum. It is a fundamental concept in quantum mechanics, which is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic level.
The idea of quantization was first proposed by Max Planck in 1900, when he discovered that energy is emitted and absorbed in discrete units called "quanta" when studying the behavior of light and blackbody radiation. Later, this idea was extended to other physical quantities, such as the momentum and position of particles.
According to quantum mechanics, the behavior of particles and systems cannot be fully described using classical mechanics, which assumes that particles have definite positions and velocities at all times. Instead, the behavior of particles and systems is described using wave functions, which represent the probability of finding a particle at a given position and time.
The principles of quantum mechanics have important applications in many areas of physics, including atomic and molecular physics, condensed matter physics, and particle physics. They are also the basis.
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4. A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results?
A. The student should take the average of the minimum and maximum value of the results.
B. The student should use the value that is closest to 100ºC.
C. The student should use the maximum value of the results.
D. The student should take the average of the results from all four trials.
Answers
Answer:
i think its D
Explanation:
In order to get maximum accuracy, student should take average of results from all four trials.
What is accuracy?Accuracy in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:
1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.
2)Percentage of true value--It is the accuracy which is determined by identifying accuracy of the instrument and comparing it with the measured true value.
3)Percentage of scale range- It is the accuracy which determines accuracy of the measurement.
Accuracy in case of instruments is neglected up to ±0.5 percent.Accuracy of measurements can be increased by taking multiple measurements and taking into account human errors.
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For any large collection of randomly selected chlorine atoms:
a. what is the average atomic mass of chlorine in amu?
Answers
An atomic mass unit is defined as 1/12 th of the mass of carbon-12 atom.
The mass of an atom is mainly due to its protons and neutrons in the nucleus.
Weight of a proton is 1.6 x 10^-27 kg
Weight of a neutron is 1.6 x 10^-27kg
However weight of an electron is 9 x 10^-31kg and hence is negligible in calculation of amu
A chlorine atom has 17 protons in its nucleus and 18 neutrons in its nucleus
Its atomic number is 17
Amu weight of Cl= weight of protons+ weight of neutrons
=17+18
=35amu
Hence the average atomic mass unit of chlorine atoms will be 35 amu
Disclaimer:
The value is taken for easier calculation and is not accurate upto 3 decimals
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What does it mean to interpret data?
Answers
Answer:
Data interpretation is the process of reviewing data through some predefined processes which will help assign some meaning to the data and arrive at a relevant conclusion. It involves taking the result of data analysis, making inferences on the relations studied, and using them to conclude
Explanation:
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Determine whether the following five molecules are polar or nonpolar and explain your answer:
a) Beryllium chloride b) Hydrogen sulphide c) Sulphur trioxide d) Water e) Trichloromethane
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The following are categorized into polar or nonpolar molecules:
a) Beryllium chloride - nonpolar b) Hydrogen sulphide - polar c) Sulphur trioxide - nonpolar d) Water - polar e) Trichloromethane - polar How to determine polar or nonpolar?a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.
b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.
c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.
d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.
e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.
Find out more on polar or nonpolar here: https://brainly.com/question/17118815
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Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to
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Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to zero.
What is potential energy?Potential energy is a type of energy that is stored and depends upon the relative height of system. If its height is increased, the potential energy is also increases while on the other hand, if the body comes to the surface of the earth, its potential energy will be zero due to no height of the object. We know that potential energy is equals to product of mass, gravity and height of an object.
So we can conclude that if the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to zero.