The stronger base in each of the following pairs based on their compositions and structures and on conjugate acid-base relationships are \(BrO^-\)or \(ClO^-\). Option A is correct. The stronger base in this pair is \(ClO^-\). \(ClO^-\) is a stronger base than \(BrO^-\) due to its structure.
\(ClO^-\) is a symmetrical structure, with a charge spread over the entire molecule, while \(BrO^-\) has an asymmetrical structure with a charge on one atom only. Therefore, \(ClO^-\) is the stronger base. b. \(BrO^-\) or \(BrO_2^-\)The stronger base in this pair is \(BrO_2^-\). \(BrO_2^-\) is a stronger base than BrO- due to its structure. \(BrO_2^-\) has two oxygen atoms, while \(BrO^-\) has only one.
Since oxygen is a more electronegative element than bromine, \(BrO_2^-\) is more stable, and thus is the stronger base. c. \(HPO_4^{2-}\) or \(H_2PO^{4-}\) The stronger base in this pair is \(HPO_4^{2-}\). \(HPO_4^{2-}\) is a stronger base than \(H_2PO^{4-}\) because it has a higher pH. \(HPO_4^{2-}\) is a more basic compound because it has two negative charges instead of one. It is also less acidic than \(H_2PO^{4-}\).
a. To compare \(BrO^-\) and \(ClO^-\), consider the electronegativity of the central atom. Br has a lower electronegativity than Cl, making it less able to hold onto its electron. Therefore, \(BrO^-\) is the stronger base.
b. In the case of \(BrO^-\) and \(BrO^{2-}\), the additional oxygen in \(BrO^{2-}\) will pull electron density away from Br, making \(BrO^{2-}\) less likely to accept a proton. So, \(BrO^-\) is the stronger base.
c. \(HPO4^{2-}\) has a higher negative charge compared to \(H_2PO^{4-}\), making it more likely to attract a proton. Thus, \(HPO4^{2-}\) is the stronger base.
Hence, option a is correct.
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Which functional group is found in an ester?
If H₂O is removed from this reaction, what will happen? 2H₂ + O2 2H₂O
A. The equilibrium will not change.
B. The reaction will be reactant-favored.
C. The reactants will react to produce more H₂O.
D. The product-favored reaction will stop.
Answer:
c number is the answer of this question
If H₂O is removed from the given reaction, the reactants will react to produce more H₂O. Therefore, the correct option is option C.
What is Le Chatelier′s Principle?Le Chatelier's Principle states that when a chemical system is under stress and in equilibrium, the equilibrium should change to lessen the stress. In response to an alteration in temperature, intensity, volume, or pressure, it can be used to forecast the course of a chemical reaction.
The equilibrium law or Chatelier's principle are other names for Le Chatelier's principle. The theory foretells how changes will affect a system. Although it is most frequently used in chemistry, it is equally relevant in economics as well as biology (homeostasis). If H₂O is removed from the given reaction, the reactants will react to produce more H₂O.
Therefore, the correct option is option C.
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how many atoms does All(OH)3 have
Answer:
Seven Atoms
Explanation:
It has a total of three elements and seven atoms. Another use that aluminum hydroxide has is it treats the symptoms of too much stomach acid. Some examples of what it treats are: upset stomach, heartburn, and acid indigestion.
calculate the volume in liters of a mm silver(ii) oxide solution that contains of silver(ii) oxide . round your answer to significant digits.
The volume of the solution is 1.84 × \(10^{4}\) L.
The formula used to get the molarity of the solution is used to determine the volume of the solution:
Molarity= \(\frac{Mass of the solute}{molar mass of solute * Volume of solution(in L)}\)
We are given:
Molarity of solution = 8.75 × \(10^{-5}\) M
Given the mass of silver (II) oxide = 200 g
Molar mass of silver (II) oxide = 124 g/mol
Put the values in the formula:
8.75 × \(10^{-5}\)\(10^{-5}\) = \(\frac{200}{124* Volume}\)
Volume= 1.84 × \(10^{4}\) M
A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The most used molarity unit in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units.
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Calculate the density of an object with a mass of 15.6 grams and a volume of 2 cm3
Answer:
7.8 g/cm³
Explanation:
The density of an object can be defined as the object's mass divided by its volume:
Density = mass / volumeWe are given both the mass and volume by the problem, so we compute the data in the equation:
Density = 15.6 g / 2 cm³Density = 7.8 g/cm³This means the density of the object is 7.8 g/cm³.
what did henry moseley contribute to the periodic table?
Answer:
In 1913 he used self-built equipment to prove that every element's identity is uniquely determined by the number of protons it has. His discovery revealed the true basis of the periodic table and enabled Moseley to predict confidently the existence of four new chemical elements, all of which were found.
Will mark brainly
ASAP
Answer:
A. Shivering
Explanation:
This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled.
Write the chemical symbols for three different atomic cations that all have 19 protons.
The chemical symbols for three different atomic cations that all have 19 protons : [Ca+] and [Sc2+] and [Ti3+]
Calcium:
Calcium have 20 electrons or it have 20 atomic number. Since an atom is a neutral species.
[Ca] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s2)
After losing one electron atom gain positive charge and is become
[Ca+] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s1)
Scandium:
Scandium have 21 electrons or it have 21 atomic number. Since an atom is a neutral species.
[Sc] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s2) (3d1)
After losing two electron atom gain positive charge and is become
[Sc2+] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s1)
Titanium:
Titanium have 22 electrons or it have 22 atomic number. Since an atom is a neutral species.
[Ti] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s2) (3d2)
After losing three electron atom gain positive charge and is become
[Ti3+] = (1s2) (2s2) (2p6) (3s2) (3p6) (4s1)
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Consider the balanced equation. PCl3 + 3H2O Right arrow. H3PO3 + 3HCl What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl3? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
Answer:
Percient yield of reaction: 85 %
Explanation:
The reaction is:
PCl₃ + 3H₂O → H₃PO₃ + 3HCl
We only have data from the chloride, so we assume water is in excess. We convert the mass to moles:
62 g . 1mol / 137.32 g = 0.452 mol
If ratio is 1:3, from 0.452 mol we would produce three times as big, that amount. (0.452 . 3) = 1.36 moles of HCl.
We convert the amount to mass.
1.36 mol . 36.45g / 1mol = 49.4 g
This value of produced HCl is the theoretical yield. To determine the percent yield we make:
(Yield produced / Theoretical yield) . 100
(42 g / 49.4g) . 100 = 85%
Answer:
Yes it is 85.0%
Explanation:
what is the function of digestive enzymes????
Answer:
Digestive enzymes break down food into smaller building blocks which makes it easier for absorption by the body.
Answer:
Break down the pood particles for their absorption e. g pepsin breaks down protein for its absorption in small intestine. Pepsin is present in stomach
Hydrogen atoms are excited by a laser to the =4 state and then allowed to emit.
What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? Calculate the wavelength of the 4⟶3 transition.
Answer:
1875 nm
Explanation:
Given the Rydberg formula for hydrogen: 1/λ = R(1/n₁² - 1/n₂²)
where R ≈ 1.097* 10^7 /m
Hence;
1/λ = 1.097* 107/m * (1/3² - 1/4²) = 5.3 * 10^5/m
λ = 1.875 * 10-6 m = 1875 nm
if the Gulf Stream is warm and the air in Europe is cold, what kind of energy transfer will happen between the water and the air?
Answer:
If it weren't for the warm water of the Gulf Stream, England would have a much colder climate
Explanation:
Answer:
If it weren't for the warm water of the Gulf Stream, England would have a much colder climate
Explanation: hope it helps ^w^
Why does warm soda go flat faster than chilled soda?
A. Gas molecules stay dissolved in warm soda.
B. Gas molecules move slower in warm soda.
C. Gas molecules move faster in warm soda.
D. Gas molecules cannot escape in warm soda.
E. Gas molecules stay trapped with the solvent in warm soda.
Answer:
My best guess is c
Explanation:
Answer:
C for plato
Explanation:
In this reaction, how many moles of ethane (C2H6) would react with 35 moles of 02? 2C2H6 + 702 + 6H20 + 4CO2 O
A. 30 O
B.2 O
c. 10
D. 20
Answer:
C = 10
Explanation:
Given data:
Moles of O₂ = 35 mol
Moles of C₂H₆ react = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 6H₂O + 4CO₂
Now we will compare the moles of O₂ with C₂H₆.
O₂ : C₂H₆
7 : 2
35 : 2/7×35 = 10 mol
Option C is correct.
Answer:
c. 10
Explanation:
a p e x , just took the quiz
Balance equations practice
Answer:
1 - B) 2 - B) 3 - A)
Explanation:
1. C3H8 + 5O2 → 3CO2 + xH2O.. Find 'X'.
A) 3
B) 4
C) 5
D) 6
2. 4Al + 3O2 → xAl2O3. Find 'X'
A) 3
B) 2
C) 4
D) 5
3. FeCl3 + 3NaOH → Fe(OH)3 + xNACl. Find 'x'
A)3
B) 4
C)5
D)6
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For some transformation having kinetics that obey the Avrami equation, the parameter n is known to have a value of 1.5. If the reaction is 25% complete after 125 s, how long (total time) will it take the transformation to go to 90% completion
The Avrami equation is a mathematical model used to describe the kinetics of certain types of transformations, such as phase transformations in materials. The equation takes the form of a power law, where the extent of transformation is related to the time of the reaction and a parameter called "n". For the given transformation, it is known that n has a value of 1.5.
To determine the total time required for the transformation to reach 90% completion, we can use the Avrami equation and the information that the reaction is 25% complete after 125 seconds. From the equation, we know that:
X = 1 - exp(-(kt)^n)
where X is the extent of transformation, k is the rate constant, t is time, and n is the Avrami parameter. Solving for k, we get:
k = (ln(1/(1-X)))^(1/n) / t
Substituting X = 0.9 (90% completion) and n = 1.5, we can solve for k. Then, we can use k and the initial extent of transformation (X=0.25) to solve for the total time required for 90% completion:
t = ((ln(1/(1-0.9)))^(1/1.5) - (ln(1/(1-0.25)))^(1/1.5)) / k
The resulting value of t will give us the total time required for the transformation to go from 25% to 90% completion.
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a gas at constant volume has a pressure of 3.20 atm at 300. k. what will be the pressure of the gas at 290. k? 2.86 atm 3.09 atm 3.31 atm 3.56 atm
The relationship between pressure and temperature of a fixed amount of gas in a rigid container is called Charles’ Law.
According to Charles’ Law, for a given mass of gas at a constant volume, the volume of the gas varies directly with the temperature. It can be represented by the formula :V/T = constant where, V = volume of the gas T = temperature of the gas (in Kelvin)constant = proportionality constant Since pressure, volume, and temperature of the gas are interdependent, we can write:
PV/T = constant. We can use this formula to solve the problem. We know that the volume of the gas is constant. So, we can write:
P1/T1 = P2/T2 where, P1 = 3.20 atm (pressure at 300 K)T1 = 300 K (temperature at 3.20 atm)T2 = 290 K (temperature at unknown pressure)
Now, we can calculate P2 (pressure at 290 K) as:
P2 = P1 × (T2/T1) = 3.20 atm × (290 K/300 K) = 3.09 atmAnswer:3.09 atm
When the temperature of a fixed amount of gas is increased, its volume also increases. Similarly, when the temperature is decreased, the volume also decreases. This relationship between the volume of a gas and its temperature at a constant pressure is called Charles’ Law. It can be stated as:
V/T = constant, where V is the volume of the gas and T is its temperature in Kelvin. The proportionality constant in the above equation is the number of moles of the gas multiplied by the gas constant (R).
Mathematically, we can represent this relationship between pressure, volume, and temperature of a gas as: PV/T = constant.
When the volume of the gas is constant, the above equation becomes:
P1/T1 = P2/T2where P1 and T1 are the initial pressure and temperature of the gas, and P2 and T2 are the new pressure and temperature of the gas, respectively.
Using this equation, we can calculate the pressure of the gas at a new temperature, provided we know its initial pressure and temperature, and the new temperature.
Therefore, the pressure of the gas at 290 K will be 3.09 atm.
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n is known as the principal quantum number. ... l is known as the orbital quantum number. ... ml is known as the magnetic quantum number. ... n specifies l specifies ml specifies ... a. the subshell - orbital shape. b. the energy and distance from the nucleus. c. the orbital orientation.
The first shell of an atom is its electron shell, or energy level.
The subshell is the second shell.
The particular orbital (or "cloud") within that subshell is the third shell.
What are Quantum Numbers?The position and energy of an electron in an atom are represented by a set of numbers known as quantum numbers.
principal quantum number
azimuthal quantum number
magnetic quantum number
The electron shell, also known as the atom's energy level, is the initial shell. The value of N ranges from 1 to the atom's outermost electron's shell.
By using the connection, the second shell, which is the subshell, determines the magnitude of the orbital angular momentum.
The third shell creates the orbital angular projection momentum along a certain axis and is the particular orbital (or "cloud") within that subshell.
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Plant reproduction. Answer as much as possible, thanks!
Answer:
Plant Reproduction
When plants reproduce asexually, they use mitosis to produce offspring that are genetically identical to the parent plant. The advantage of asexual reproduction is that it allows successful organisms to reproduce quickly. ...
When plants reproduce sexually, they use meiosis to produce haploid cells that have half the genetic information of the parent (one of every chromosome)
Explanation:
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A scientist studied a population of gorillas in central africa for one year. during this time, four gorillas were born and one orphaned gorilla joined the group. two older gorillas died and three males left the population to find mates. the calculated population growth was , indicating that the population .
The calculated population growth was zero indicating that the population had not net change.
What is population?The term "population" refers to the number of people or species residing in a certain area.
According to the question:
Four gorillas were born and one orphaned gorilla joined = 4 + 1 = 5
Two older gorillas died and three males left the population to find mates = 5 - 2 - 3 = 0
The population increase of gorillas was calculated to be zero, meaning that there was no net change in the population.
Hence population had not net change.
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Answer:
The calculated population growth was ZERO, indicating that the population HAD NO NET CHANGE.
Explanation: Got it right! Good luck guys!
Is a C– H bond polar or non-polar?
Group of answer choices
Could be either polar or non-polar
not enough information is given
Polar
Non-polar
A C-H bond is generally considered nonpolar since the electronegativity values of carbon and hydrogen are relatively similar. In general, electronegativity refers to an atom's ability to attract electrons towards itself. The more electronegative an atom is, the more it can pull electrons towards itself in a bond.
Carbon and hydrogen have electronegativity values of 2.55 and 2.20, respectively, according to the Pauling scale. Since the difference between the electronegativities of carbon and hydrogen is so small, C-H bonds are almost always considered nonpolar.
Because carbon and hydrogen have similar electronegativity values, they share electrons equally in a C-H bond. As a result, there are no partial charges present on either atom, and the bond is said to be nonpolar.
Nonpolar bonds are not attracted to or repelled by electric charges and can only interact with other nonpolar molecules through Van der Waals forces.
Nonpolar molecules are unable to form hydrogen bonds and are generally hydrophobic, meaning they are not soluble in water. This is due to the fact that water is a polar molecule, meaning it has partial charges and can form hydrogen bonds with other polar molecules.
As a result, nonpolar molecules are unable to dissolve in water and are typically found in hydrophobic environments.
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Giving away 20 points and brainlest, please help
What type of transport does not require energy to move molecules across the plasma membrane?
A. bilayer
B. active
C. passive
D. concentration gradient
Answer:
A
Explanation:
Answer:
I don’t think that A is the correct answer, I believe that C may be the correct answer
Explanation:
HELP ASAP!!! Which of the following statements are true concerning branched-chain hydrocarbons? Select all that apply
Branching structural molecules have the same properties as straight-chain molecules of the same molecular formula.
Highly branched molecules are more compact than straight-chain molecules of the same molecular formula.
Highly branched molecules have lower boiling points compared to straight-chain molecules of the same molecular formula.
Highly branched chain molecules have higher density than straight-chain molecules of the same molecular formula.
Comparing molecules with the same molecular formula, highly branched molecules are more compact than straight-chain ones, hence options B and C are correct.
In comparison to straight-chain molecules with the same chemical formula, highly branched compounds have lower boiling points.
Because branching reduces the surface area of the molecule that is available for intermolecular interactions.
Which weakens the attractive forces between molecules, branched-chain hydrocarbons typically have lower boiling temperatures than straight-chain hydrocarbons of the same molecular formula.
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Which of the following reactions produces iron, the metal? a. fecl3(aq) zn(s) b. fecl3(aq) cu(s) c. fecl3(aq) ca(no3)2(aq) d. fecl3(aq) br2(l) e. fecl3(aq) f2(g)
Answer:
a: FeCl3(aq) + Zn(s).
Explanation:
In this reaction, iron(III) chloride (FeCl3) reacts with zinc (Zn) to produce iron (Fe) metal as a product. The chemical equation for this reaction is:
2 FeCl3(aq) + 3 Zn(s) -> 2 Fe(s) + 3 ZnCl2(aq)
This is a single-replacement reaction, where zinc (Zn) displaces iron (Fe) from iron(III) chloride (FeCl3), resulting in the formation of iron metal (Fe) and zinc chloride (ZnCl2) as the product.
The correct answer is a. FeCl₃(aq) Zn(s).
In this reaction, zinc (Zn) is more reactive than iron (Fe) and will displace Fe from its compound FeCl₃, forming ZnCl₂(aq) and Fe(s), the metal.
The other reactions listed do not involve a more reactive metal that can displace iron from its compound, and therefore, do not produce iron.
Let's look at each of the reactions:
b. FeCl₃(aq) Cu(s)
In this reaction, copper (Cu) is less reactive than iron (Fe) and cannot displace Fe from its compound FeCl3. Therefore, this reaction will not produce iron.
c. FeCl₃(aq) Ca(NO₃)₂(aq)
This reaction involves a double displacement reaction, where FeCl₃ and Ca(NO₃)₂ exchange their respective ions. The products are Fe(NO3)₃(aq) and CaCl₂(aq). This reaction does not produce iron metal.
d. FeCl₃(aq) Br₂(l)
This reaction involves a redox reaction, but it does not produce iron metal. In this reaction, FeCl₃ oxidizes Br₂, forming FeCl₂ and BrCl. There is no production of iron metal.
e. FeCl₃(aq) F₂(g)
This reaction also involves a redox reaction, but it does not produce iron metal. In this reaction, FeCl₃ oxidizes F₂, forming FeCl₂ and FCl. There is no production of iron metal.
Therefore, only the reaction FeCl₃(aq) Zn(s) produces iron metal.
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(Characteristic Polynomial.) One of the most celebrated linear algebra results relating to eigenvalues is the Cayley-Hamilton theorem. Recall that the characteristic polynomial is given by p(1) = det(XI – A) = \" + An-111-1 + +ail+ao. The Cayley-Hamilton theorem states that n = = P(A) = AM + An-1 An-1 +...+Q1A + Qol = = 09 where we now view p: R*n → Rnxn as a mapping on the space of Rnxn matrices. This theorem holds in general for any matrix. In this problem you will show it holds for the following easier setting. Suppose A is diagonalizable. a. Recall that in Mod3-L1 we saw how to compute powers of matrices that are diagonalizable i.e., Ak = VAKV-1, = т т where V is a matrix containing the eigenvalues of A, and A is a diagonal matrix with the eigenvalues. Consider a polynomial q(s) Amsm + am-18m-1 +...+ a1s + ao. Show that 9(A) =V9(A)V-1 where q(A) = diag(q(11), ..., 9(\n)). = = = b. Now, apply part a. to the polynomial p(X) = det(XI – A) to show that p(A) = 0.
The Cayley-Hamilton theorem states that if a square matrix A is diagonalizable, then its characteristic polynomial p(X) = det(XI – A) is equal to the minimal polynomial p(X) of A. In other words, p(A) = 0.
To show this, we can use the fact that A is diagonalizable and write A as VAV-1, where V is a matrix containing the eigenvalues of A. Then, we can expand the determinant using the Leibniz formula and use the fact that the determinant of a diagonal matrix is equal to the product of its diagonal elements.
In part a), we have shown that the powers of A can be computed using the power matrix V. Specifically, we have shown that Ak = VAKV-1, where V is a matrix containing the eigenvalues of A, and A is a diagonal matrix with the eigenvalues.
In part b), we can apply part a) to the polynomial p(X) = det(XI – A). Since p(A) = 0, we know that A is a divisor of p(X), which means that there exists a matrix B such that p(X) = p(B)q(X), where q(X) is a polynomial of lower degree than p(X). In other words, we can write p(X) as a product of a power of a diagonal matrix (which represents the eigenvalues of A) and a polynomial of lower degree.
Using the fact that p(A) = 0 and the fact that the determinant of a product of matrices is equal to the product of the determinants, we can write p(X) = 0q(X). Since q(X) is a polynomial of lower degree than p(X), it follows that p(X) = 0, which completes the proof of the Cayley-Hamilton theorem.
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A gas at constant pressure and a temperature of 293K has a volume of 8.0 L. If the temperature of the gas is increased to 314K, what is the volume?
V2 = 8.6 L
Explanation:
Given:
T1 = 293K. T2 = 314K
V1 = 8.0 L V2 = ?
Using Charles's law and solving for T2,
V1/T1 = V2/T2
V2 = (T2/T1)V1
= (314K/293K)(8.0 L)
= 8.6 L
1.16g of methane burns completely with 4.16g of oxygen to form 3.52g of carbon dioxide and
water If the reaction obeys the law of conservation of mass, the weight of water formed is
Answer:
weight of H₂O formed = 2.3 grams H₂O (2 sig. figs.)
Explanation:
Rxn: CH₄(g) + 2O₂(g) => CO₂(g) + 2H₂O(g)
Given: 1.16g 4.16g 3.52g ? (g)
Moles: 1.16g/16g·mol⁻¹ 4.16g/32g·mol⁻¹ 3.52g/44g·mol⁻¹
= 0.0725mol. = 0.13mol. = 0.08mol. => ? (moles)
Limiting Reactant: Divide each mole value by related coefficient of balanced standard equation (that is, balanced with coefficients in lowest whole number ratios). The smaller value is the limiting reactant.
0.0725/1 0.13/2 0.080/1
= 0.0725 = 0.065 = 0.080
Limiting Reactant is O₂(g) => 0.065 is smaller value after dividing each mole value by related coefficient of balanced equation.
NOTE: When working problem, however, one must use the mole value calculated from given amount in grams. That is, in this case 0.13 mole O₂. The 'divide by related coefficient and check smaller value' is ONLY for identifying the limiting reactant. This trick works for ALL general chemistry problems.
Moles H₂O formed: Since the coefficient of the limiting reactant (O₂) equals the coefficient of water (H₂O), then the moles of water formed is 0.065 mole H₂O.
Weight (in grams) of H₂O formed:
Grams H₂O = moles H₂O x formula weight H₂O
= 0.13 mole H₂O x 18 g H₂O/mole H₂O
= 2.34 g H₂O (calculator answer)
= 2.3 g H₂O (final answer should be rounded to 2 sig. figs.) => form of final answer should be based on data in final computation having the least number of sig. figs.
Review: Sequence of calculations
Write and balance equation to smallest whole no. ratio of coefficients.If not in moles, convert given 'measured' data to dimension of moles. => moles = mass (g)/formula wt(g·mol⁻¹) => moles = volume of gas in Liters/Std Molar Volume (= 22.4L·mole⁻¹ at STP) => moles = no. of particles / Avogadro's No. (= 6.02 x 10²³ part's/mole)Determine Limiting Reactant => mole values of each compound given / related coefficient in standard equation => smallest value is L.R.Determine moles of unknown needed/used/formed from limiting reactant in moles and coefficient of unknown compound in standard equation given data values.=> moles of limiting reactant / coefficient of same cpd. in std. equation = unknown (X) / coefficient of same (unknown) cpd. in std. equation
=> cross multiply and solve for unknown (X)
=> L.R.(moles) / eqn. coef. of L.R. = X / eqn. coef. of X
=> (L.R.(calc'd moles)(eqn. coef. of X) = (X)(eqn. coef. of L.R.)
=> X (in moles) = (L.R.(calc'd. moles)(eqn. coef. of X) / (eqn. coef. of L.R.)
Convert X-answer in moles to desired dimension specified in problem.=> grams = moles x formula wt.
=> volume (L) = moles x std. volume (= 22.4L/mole)
=> #particles = moles x Avogadro's Number (= 6.02 x 10²³ parts/mole)
what does solubility mean?
Solubility means the ability of a solute to dissolve in solvent to form a solution.
What is solubility?Solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a particular temperature.
The solute can be a solid, liquid or a gas.
The solubility of a solid or a liquid solute in a solvent is affected by the temperature, while the solubility of a gaseous solute is affected by both the temperature and the pressure of the gas.
Therefore, Solubility means the ability of a solute to dissolve in solvent to form a solution.
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4 The Mr of sodium hydroxide is 40. How many grams of sodium hydroxide are there in: a 500 cm³ of a molar solution? b 25 cm³ of a 0.5 M solution?
There are 20 grams of Sodium hydroxide in a molar solution that has a volume of 500 cm3.
Sodium hydroxide – what is it? (NaOH)Caustic soda and lye are two other names for sodium hydroxide. It is a typical component of soaps and cleansers. Sodium hydroxide seems to be a white, unscented solid at room temperature. Sodium hydroxide is a colorless, odorless liquid. Strong acids and water can cause explosive reactions with it.
Molarity is calculated by
moles (solute) / volume of solution in L
No. of moles = mass / molar mass
We have to find mass of sodium hydroxide (NaOH)
As we know, in 1 L (1000 cm³) of molar solution there is 40 gram of NaOH present.
From using this statement, 500 cm³ of a molar solution, means half liter of a molar solution contain -
= 40 / 2
= 20 gram of NaOH.
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5. Geologists think that the inner and outer cores of Earth consist of
iron and nickel.
Answer:
is this true/false? if so its true.
Explanation: