The volume of a 2.0 m solution of NaOH needed to prepare 494.4 ml of a 0.15 m solution of NaOH is 37.08 ml.
Dilution is defined as the process in which the concentration of a sample is decreased by adding more solvent. The dilution formula is given below.
C₁V₁ = C₂V₂
where C₁ = initial concentration of sample = 2.0 m
V₁ = initial volume of sample
C₂ = final concentration after dilution = 0.15 m
V₂ = total final volume after dilution = 494.4 ml
Plug in the values to the formula and solve for the volume of the solution needed.
V₁ = C₂V₂/C₁
V₁ = (0.15 m)(494.4 ml)/(2.0 m)
V₁ = 37.08 ml
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in a catalyzed chemical reaction, one function of a catalyst is to . group of answer choices increase the energy given off during the reaction increase the number of successful reactant collisions increase the temperature at which the reaction is carried out decrease the concentration of reactants change the equilibrium concentrations of the products and reactants
In a catalyzed chemical reaction, one function of a catalyst is to increase the number of successful reactant collisions .
catalyzed reaction are the reaction which used to accelerate the rate of the reaction. Catalyst is used to increases the speed of reaction . catalyst minimize the path of the reaction. the main function of the catalyst is to speed up the chemical reaction. the catalyst is not being consumed during the chemical reaction. catalyst is to increase the number of successful reactant collisions .
Thus, In a catalyzed chemical reaction, one function of a catalyst is to increase the number of successful reactant collisions .
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(a) how many milliliters of 0.155 m hcl are needed to neutralize completely 45.0 ml of 0.101 m ba(oh)2 solution?
29,322 milliliters of 0.155m hcl are needed to neutralize completely 45.0 ml of 0.101m ba(oh)2 solution Given that :
Hcl + Ba(oh)2 gives Bacl2 + 2h20
Molarity = mole of solute / volume of solution in liters
Molarity = 0.101 m
Volume = 45 ml
mole of solute (ba(0h)2) = Molarity * volume
= 0.101 * 45 ml
= 4.545
now we have to find the volume of hcl so,
again
molarity = mol solute/ volume of solution
volume of solution = mole solute / molarity
= 4.545 / 0.155m
= 29. 322 liters
= 29,322 ml
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Is boiling or evaporation of water more common on earth
calculate the mass of 45.0 L of Cl2 at 87.0°C and 950. mm Hg.
use the ideal gas law formula and here are values for R:
8.134 (L * kPa)/(mol * K)
0.0821 (atm * L)/(mol * K)
62.364 (L * mmHg)/(mol * K)
include the following with your answer:
Which Gas Law constant did you use or which “R” value did you use? Why?
The numerical answer to the question.
An explanation of the correct number of significant figures you will use for the numerical answer.
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
What is the theory of the ideal gas law?The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).
Briefing:Volume = 45.0 L
Temperature =87 = (87.0 + 273) K = 360 K
Pressure = 950 mm Hg (1 mm Hg = 0.00131579 atm) = 1.25 at
The following formula is used to calculate moles.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
As shown, enter the values into the formula above.
PV = nRT
1.25 atm* 45.0 L = n * 0.0821 L atm /mol K * 360 K
n = 1.25 atm* 45.0 L / 0.0821 L atm /mol K * 360 K
n = 56.25 / 29.556
n = 1.90 mol
The mass of a substance divided by its molar mass is expressed in moles. The following formula is used to compute the mass of (molar mass = 37.99 g/mol).
Moles = mass / molar mass
1.90 mol = mass/37.99 g/mol
Mass = 72.181 g
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
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How does the atomic radius change as you move left to right in Period 3 from aluminum through chlorine? Refer to the periodic table.
A. it generally increases.
B. it does not change.
C. it generally decreases.
D. it varies unpredictably.
Answer:
C it generally decrease
Explanation:
Atomic radius of an element decrease from left to right of the periodic table
1. Which of the following gas samples contains the largest number of molecules?
(A) 12 g of He (molar mass=4)
(B) 14 g of N₂ (molar mass=28)
(C) 34 g of NH3 (molar mass= 17)
(D)88 g of CO₂ (molar mass = 44)
The molar mass of the gas samples must be known to find the greatest concentration of molecules.
What is a molar mass?
A substance's molar mass is its mass in grams per mole of the chemical. A mole measures a substance's quantity of atoms, molecules, or ions. A mole is 6.022 1023 molecules of any given chemical.
Molar Mass calculation formula
M=m/n
M= molar mass
m=mass of substances (in grams).
n= number of moles of a substance.
How is molar mass determined, and why is it important?
One mole of material is weighed to determine its molar mass. Add the masses of all the components in a molecule to determine the molecular mass of the molecule by multiplying the subscript (number of atoms) by the atomic mass of each element in the molecule.
Using the molar mass formula,
M= 12/4 = 3,
It can be determined that 3 moles (or 3*avogadro number of molecules) are present.
Hence we can conclude that option (a) is correct.
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calculate the concentration of h3o ions present in a solution of hcl that has a measured ph of 3.110 .
The concentration of H₃O⁺ present in a solution of HCL is 7.76247 × 10⁻⁴.
Since we know,
pH<7, therefore there are only H₃O+ particles in the solution.
[H₃O⁺ ] = [tex]10^{-pH}[/tex] = [tex]10^{3.110}[/tex] = 7.76247× 10⁻⁴
Pure water will have fewer hydroxide and hydronium ions. They can combine to form water. There will be a dynamic equilibrium between the concentration of molecules of water and ions. The definition of pH states that negative logarithms of hydronium ion concentration. The self-ionization will take place and increase the H⁺ concentration and side by side reduce the OH⁻ concentration.
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if 2.50g of the organic fuel was reacted with 2.50g of oxygen and 1.00g of water was actually produced, what is the percent yield of this reaction?
The percent yield would be 40% if 2.50g of the organic fuel was reacted with 2.50g of oxygen and 1.00g of water was produced.
How is the percent yield of an organic molecule determined?
The percentage yield is a figure generated to represent the discrepancy between an experiment's theoretical and actual yields. There are by-products and desired products while experimenting with various solutions or producing chemical solutions.To calculate the yield percentage: Multiply by 100 after dividing the actual yield obtained in the lab by the estimated theoretical yield.For instance, your percent yield would be as follows if you started with 100 grams of compound A and produced 80 grams of product B: 80% yield is equal to (80 grams B / 100 grams A) × 100.To learn more about percent yield, follow the link https://brainly.com/question/12704041
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Draw the addition products formed when one equivalent of hbr reacts with 2,4‑hexadiene. Draw a single product for each. Ignore stereochemical or chiral isomers.
The addition products formed after the reaction are 4-bromo-2-hexene and 2-bromo-3-hexene.
What happen when addition of Hbr to alkenes occur?The simplest type of electrophilic reaction to visualize is the addition of as haloacid such as Hbr to an isolated alkene.
The reaction starts between terminal carbon of the double bonds and H⁺. After attaching H⁺ to the carbon, one double bond disappears leaving nearby CH respectively charged. This intermediate is a resonance hybrid of two possible structures. Reaction of bromide at one of the carbons give the 1.2-addition product and at the other carbon gives 1,4-addition product.
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when a nucleus emits a positron, its atomic number group of answer choices decreases by 1. doesn't change. increases by 1.
When a nucleus emits a positron its atomic number decreases by 1
When a nucleus emits a beta particle means positron and its atomic number decreases by 1 and its mass number remain unchanged and a proton and electron combine to form a neutron and the mass number stay the same but the atomic number decreases by 1 and very few nuclides undergo this transformation and a proton in the parent nucleus decay into a neutron that remain in the daughter nucleus and the nucleus emit a neutrino and a positron and which is a positive particle like ordinary electron in mass but of opposite charge
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There are many theories about how life was formed on Earth.
Suggest one reason why there are many
answer yes if the substance becomes part of the filtrate or answer no if the molecule does not become part of the filtrate
Yes, the substance becomes the part of filtrate. No, the molecule does not become part of the filtrate.
What is filtrate?The most common example is making tea. While preparing tea, a filter or a sieve is used to separate tea leaves from the water. Through the sieve pores, only water will pass. The liquid which has obtained after filtration is called the filtrate; in this case, water is the filtrate.
Which substance becomes the part of the filtrate?The substances that are normally found in the filtrate are plasma components (such as water, nutrients, dissolved gases, electrolytes, and metabolic wastes) excluding plasma proteins and blood cells.
Why molecule becomes the part of the filtrate?Proteins are large molecules that cannot pass the wall of capillaries during filtration, hence, this molecule is not normally part of the filtrate.
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if the balloon had a volume of 39000 l , how many kilograms of hydrogen were needed to fill the balloon at stp?
the amount of hydrogen required was about 0.582kg
why do we require STP?
STP: Standard temperature pressure
Consider a scenario in which a chemist in London is conducting an experiment in a lab. 12 °C and 1.015 bar are the average room temperatures and pressures in London. In Austin, where the average room temperature and pressure are 21 °C and 1.014 bar, respectively, the same experiment could yield very different results. This is due to the fact that temperature and pressure have an impact on a lot of scientific experiments, particularly chemistry experiments. We have therefore adopted some standard operating procedures to prevent these deviations and to ensure that laboratory experiments are conducted in a consistent manner worldwide. STP is one of those norms.
Vm=RT/P
=8.314x273.15/39000
=0.0582
so the balloon requires about 0.0582kg of hydrogen gas
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The solubility of copper(II) iodate in water is 0.13 g/ 100 mL. Calculate the solubility product constant for copper(II) iodate, Cu(IO3)2? Cu(IO3)2(s) Cu2+(aq) + 2IO3 - (aq
The solubility product of the copper(II) iodate is 1.25 * 10^-7
What is solubility?The term solubility has to do with the amount of a substance that is dissolved in water. The solubility product is the equilibrium constant that shows the extent to which a substance is dissolved in water.
We have to convert the solubility of the copper(II) iodate from g/mL to molarity and we have;
Number of moles = 0.13 g/413 g/mol = 3.15 * 10^-4 moles
Volume of the solution = 100 mL or 0.1 L
Molarity = 3.15 * 10^-4 moles/0.1 L
= 3.15 * 10^-3 M
We now have;
Ksp = [x] [2x]^2
Ksp = 4x^3
Ksp = 4( 3.15 * 10^-3 )^3
Ksp = 1.25 * 10^-7
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a compound that contains only carbon, hydrogen, and oxygen is 68.5% c and 8.63% h by mass. what is the empirical formula of this substance?
According to the given statement C₄H₆O is the empirical formula of this substance.
Why are empirical formulas important?Empirical formulae are beneficial since figuring out the molecular formula can be immensely aided by knowing the relative amounts of each constituent in a molecule. It's crucial to have an n-value in order to figure out the precise figure of each atom within the molecule.
What are instances of empirical formulas?The smallest full numerical percentage of atoms present in a molecule serves as the actual formulation of a substance in chemistry. Hydrogen superoxide (SO) and disulfur -2 empirical formulae are two straightforward examples of this notion (S2O2).
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What is the reduced element of H2O2 + PbS = PbSO4 + H2O
Answer:
4H₂O₂ + PbS = PbSO₄ + 4H₂O
Hexane is more likely to dissolve in octane rather than ethanol.
A. true
B. false
Answer:
The answer to your question is,
A. true
Explanation:
I hope this helps
I am sorry if I am wrong
How many equivalence points will a titration between sodium hydroxide and acetic acid have?.
A titration between sodium hydroxide (NaOH) and acetic acid (CH₃COOH) will have two equivalence points. The first equivalence point will be when the acid is completely neutralized, and the second will be when the base is completely neutralized.
The first equivalence point occurs when the moles of sodium hydroxide (NaOH) is equal to the moles of acetic acid(CH₃COOH). In the titration sodium hydroxide has neutralized all of the acetic acid. The second equivalence point occurs when the moles of sodium hydroxide is equal to the moles of water. The reason for two equivalence points is that acetic acid is a weak acid and water is a strong base.
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What temp is the warmest?
A. 30 degrees celsius
B. 273 kelvin
C. 0 degrees celsius
D. 32 degrees Fahrenheit
Answer:
30 degrees Celsius, is 86 Fahrenheit.
273 kelvin, is 31.73 Fahrenheit.
0 degrees Celsius, is 32 Fahrenheit.
Then 32 degrees Fahrenheit.
The correct answer choice is A. 30 degrees Celsius.
Determine the number of valence electrons and what the atoms charge will be when it forms an ion
A. O
B. As
C.N
D.AI
E.K
Please leave instructions.
The valence electron on O = 6, As = 5, N = 5, Al = 3, K = 1
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
Similarly we can see that the outermost orbit in As is 4[tex]s^{2}[/tex]4[tex]p^{3}[/tex] hence it has 5 valence electron and the charge on Arsenic ion is +5.
The outermost orbit in N is 2[tex]s^{2}[/tex]2[tex]p^{3}[/tex] hence it has 5 valence electron and the charge on Nitrogen ion is 3-
The outermost orbit in Al is 3[tex]s^{2}[/tex]3[tex]p^{1}[/tex] hence it has 3 valence electron and the charge on Aluminum ion is 3+
The outermost orbit of K is 4[tex]s^{1}[/tex] hence it has 1 valence electron and the charge on Potassium ion is 1+
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15. The figure shows a reaction. What type of reaction is shown?
a. Synthesis
b. Decomposition
CSingle replacement
d. Double replacement
e. Combustion
Cl cu cl —> Cu+ClCl
I WILL GIVE BRAINLY PLS HELP
Answer:
Ice wedging
Explanation:
The rocks crack fill with water and then expand
a gas cylinder has a volume of 108 L when filled with 22,700 grams of nitrogen gas if the temperature of this cylinder is 27 degrees what is the pressure inside the tank?
P=183.65 atm is the pressure inside the tank for the given conditions.
How is the pressure calculated?
Given,
V=108 L
m=22700 gm
The formula is PV=nRT
moles= [tex]\frac{Mass}{Molar mass}[/tex]
∴moles of [tex]N_{2}[/tex] = [tex]\frac{22700}{28}[/tex]=810.78 moles.
R=0.082 [tex]\frac{L atm}{molK}[/tex]
T=27°C=300K
P=[tex]\frac{nRT}{V}[/tex]
[tex]P_{N_{2}[/tex]=[tex]\frac{810.71 X 0.0821 X 298}{108}[/tex]
P=183.65 atm
The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).
PV = nRT
PV = nRT is the equation for an ideal gas. In this equation, P stands for the ideal gas's pressure, V for the ideal gas' volume, n for the total amount of the ideal gas expressed in moles, R for the universal gas constant, and T for temperature.
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in the affinity chromatography lab which type of interaction will be utilized to purify lactate dehydrogenase?
Two lactate dehydrogenase isoenzymes interacting
what is affinity chromatography?
Affinity chromatography is a technique for extracting a biomolecule from a mixture that relies on a very particular macromolecular binding relationship between the biomolecule and another component. Depending on the biomolecule of interest, the specific type of binding contact may be between an antigen and an antibody, an enzyme and a substrate, a receptor and a ligand, or a protein and a nucleic acid. Binding interactions are routinely used to isolate different biomolecules. When compared to other chromatographic techniques, affinity chromatography is advantageous due to its high selectivity and resolution of separation.
In order to study the effects of pH and temperature on lactate dehydrogenase binding, immobilized NAD+ matrices were used to study the interactions of two isoenzymes of lactate dehydrogenase from pig heart muscle (H4) and rabbit skeletal muscle (M4). Investigated was how substrate, product, and sulphite affected the binding of heart muscle lactate dehydrogenase to immobilised NAD+. It was determined how the two lactate dehydrogenase isoenzymes interacted with immobilised pyridine and adenine nucleotides and their derivatives. Correlations between these factors' effects on lactate dehydrogenase's interaction with immobilised nucleotides and the known kinetic and molecular characteristics of the enzymes in free solution were found.
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One of the ceramics used in skateboards is called Cerbec. Which of the following are
also ceramics? Put rings around the two correct answers
glass ionic cement melamine nylon
Ceramics are synthetic materials which are corrosion and chemical resistant. Glass is an example of ceramic. Nylon, melamine and cement are not ceramic.
What are ceramics?Any of the several tough, fragile, heat- and corrosion-resistant materials created by sculpting and then heating an inorganic, nonmetallic material like clay to a high temperature are known as ceramics. Brick, porcelain, and earthenware are typical examples.
Pottery items or figurines composed of clay, either by itself or when combined with other materials like silica, and then hardened and sintered in fire, were the earliest ceramics produced by humans.
Later, glassy, amorphous ceramic coatings were applied over the crystalline ceramic substrates to reduce porosity, resulting in smooth, colorful surfaces for ceramics.
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a gaseous solution contains 41% O2 and 59% N2 by mass Find mole fraction of each substance in solution
A gaseous solution contains 41% O₂ and 59% N₂ by mass. The mole fraction of Oxygen is 0.377, while the mole fraction of Nitrogen is 0.622 in the solution.
What is the mole fraction of each substance in the solution?
41.0g O₃ X {(1 mol O₃) ÷ (32. 0g O₃)} = 1.28 mol O₃
Where the molecular mass of oxygen is 32
For mole fraction of nitrogen:
59.0g N₃ X {(1 mol N₃ ) ÷ (28.02 0g N₃)} = 2.11 mol N₃
Where the molecular mass of nitrogen is 28.02
Total mol = 1.28 + 2.11 = 3.39 mol total
The mole fraction of O₃ in the gaseous solution is
number of O₃ moles ÷ total moles
Mole fraction of O₃ = 1.28 mol O₃ ÷ 3.39 mol total
= 0.377
While the mole fraction of N₃ in the gaseous solution is
number of N₃ moles ÷ total moles
Mole fraction of N₃ = 2.11 mol O₃ ÷ 3.39 mol total
= 0.622
In summary, the oxygen mole fraction is 0.377 and the nitrogen mole fraction is 0.622 in a gaseous solution that contains 41% O₂ and 59% N2 by mass
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the solubility of n2 gas in blood is 6.1e-4 when the partial pressure of n2 gas is 1 atm and the temperature is 37 c if a scruba diver breathes compressed air with a total air pressure of 3 atm what is the solubility of n2 in her blood
The partial pressure of nitrogen gas is 1.43 x 10^-3 M to be exact, but we can also consider it as 1 atm.
Partial pressure can be defined as- if a container filled with more than one gas, each gas exerts pressure. The pressure of anyone gas within the container is called its partial pressure.
As we know, pressure is the force per unit area. Partial pressure can be the pressure half-filled the area.
Ideal gas behavior allows gas mixtures to be specified simply. In particular, the ideal gas law holds for each component of the mixture separately. Each component exerts its own pressure referred to as its partial pressure.
Partial pressure is the measure of the thermodynamic activity of gas molecules. The gasses diffuse and react based on their partial pressures and not concentrations in a gaseous mixture.
Complete question: -
The solubility of N2 gas in blood is 6.10 x 10^-4M when the partial pressure of N2 gas is 1.00 atm and the temperature is 37-degree C. If a scuba diver breathes compressed air with a total air pressure of 3.00 atm, what is the solubility of N2 in her blood?
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a 355-ml can of soda pop contains 41 g of sucrose (c12h22o11). what is the molarity of the solution with respect to sucrose?
A 355-ml can of soda pop contains 41 g of sucrose the molarity of the solution with respect to sucrose is 0.337 M
Given that 41g of sucrose
Number of moles = amount in g/ molar mass
Number of moles= 41 g / 342.2965 g/mol
Number of moles= 0.12 moles Sucrose
Volume = 355 ml or 0.355 L
Thus,
Molarity = 0.12 moles / 0.355 L
Molarity= 0.337 M
The term "molarity of the solution" refers to how many moles of solute there are in a liter of solution. M served as its symbol. The ratio of moles of solutes per liter of solution is known as the molarity of any solution. The following formula captures it.
Molarity (M) = moles of solute/liter of solution
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2. Suppose you burn magnesium in a limiting amount of oxygen in a closed system,
expecting to get 1.61 g of MgO. You measure only 0.988 g MgO after the reaction.
Show how you would calculate the percent yield for this reaction. (2 pts)
The percentage yield of the given reaction was supposed to be
the formula for the calculation of the percentage yield was =actual yield/theoretical yield X 100
What is percentage yield ?
The percent yield equation is as follows:
(actual yield/theoretical yield) x 100% Equals percent yield
Where: actual yield is the quantity of product received from a chemical reaction theoretical yield is the amount of output obtained from the stoichiometric or balanced equation, utilizing the limiting reactant to calculate product (moles or grams).
The quantity of products generated from a chemical reaction is referred to as the real yield. The theoretical yield is the quantity of product calculated from the stoichiometric or balanced equation utilising the limiting reactant to determine product.
=(0.988/1.61) X 100
=61.36%
the percentage yield of the reaction was found to be 61.36%
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(don’t need to answer all the questions i just need help with these!)
1) how many grams of iron are produced when 450. grams of iron (III) oxide react?
2) how many grams of water will be produced when 0.0155 moles of hydrogen gas completely react with Iron (III) oxide?
3) How many moles of mercury (II) oxide are needed to produce 12 grams of mercury?
4) How many moles of oxygen gas will be produced from 0.03 mol mercury (II) oxide?
5) How many moles of AlPO4 are produced when 0.27 of K3PO4 were used?
6) What is the mass of K3PO4 are needed to produce 2.04 moles of KNO3?
Answer:
Explanation:
1) Fe2O3 + 3 H2 -----> 2 Fe + 3 H2O Number of moles of Iron (III)oxide = 450 g / 159.69 g/mol = 2.82 mole
2) 0.0155 moles of hydrogen gas
3) oxide needed to produce 125 of oxygen is7.8 moles
4) 216.5894
5) K3PO4 and KNO3
