The pH of the solution of 0.20 m hno2 containing 0.10 m nano2 at 25°c is approximately 3.05.
To find the pH of the solution containing 0.20 M HNO₂ and 0.10 M NaNO₂ at 25°C, we'll use the Henderson-Hasselbalch equation. Here's a step-by-step explanation:
1. Identify the Ka value of HNO₂, which is given as 4.5 × 10⁻⁴.
2. Calculate the pKa using the formula: pKa = -log(Ka)
pKa = -log(4.5 × 10⁻⁴) ≈ 3.35
3. Identify the concentrations of the acid (HNO₂) and its conjugate base (NO₂⁻), which are 0.20 M and 0.10 M, respectively.
4. Apply the Henderson-Hasselbalch equation: pH = pKa + log([A⁻]/[HA])
pH = 3.35 + log(0.10/0.20)
5. Calculate the pH:
pH = 3.35 + log(0.5) ≈ 3.35 - 0.3 = 3.05
For more question on pH click on
https://brainly.com/question/172153
#SPJ11
Anita was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into a tub filled
with salt water for eight hours. Anita wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Anita cut ten squares of
steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares
into a tub filled with vinegar. Once an hour for eight hours, Anita counted the number of rusted steel squares in each group.
What is the manipulated independent variable in Anita's experiment?
Answer:
The type of liquid in the tub (salt water or vinegar)
Explanation:
The manipulated independent variable in Anita's experiment is the type of liquid in the tub.
The independent variable is the controlled or manipulated variable in the course of an experiment. It can also be referred to as the 'cause' variable which has the capacity to produce 'effects' on another variable - the dependent variable.
In this case, the type of liquid the tub is filled (salt water or vinegar) will hypothetically affect the rusting period of the steel. Hence, the dependent variable is the type of liquid the tub is filled while the dependent variable would be the time it takes for the steel to get rusted.
Nitrogen boils at -195°C, because it is normally a gas at room temperature. At -250°C, it is a: solid, liquid, gas
Answer:
i think its liquid because they is liquid nitrogen and the gas but i think its liquid
Chemical element Number of atoms in reactants
Number of atoms in products
The number of atoms in reactants is equal to the number of an atom in the products.
According to the chemical properties, the reaction must be balanced, and the balanced chemical equation is known as a balance chemical reaction, and in the chemical equation, the number of atoms in the reactant equals the number of atoms in the products.
When Sodium hydroxide( NaOH) reacts with Hydrogen chloride ( HCl) it form sodium chloride ( NaCl) and water ( H₂O). As the equation is shown below
NaOH + HCl → NaCl + H₂O
here the number of sodium atoms in the reactant is one, and in the product, it is also 1, whereas chloride atoms in the reactant are 1 and similar in the product. Similarly, hydrogen and oxygen have 2 and 1 atoms in reactions respectively, and the same in the product. Hence equation is balanced.
To learn more about balanced chemical equations, use the following link
https://brainly.com/question/14200233
#SPJ9
Help please ASAP!!!!!!
Answer:
which subjet is this math science or history
What kind of energy is produced from moving water?
Answer:
When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.
Explanation:
HAVE A GOOD DAY! :)
I HOPE THIS HELPS! :)
Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends. textbook period row compound group
Elements that are in the same group have a tendency to have very similar chemical properties due to periodic trends.
The periodic table is organized into groups (also known as families or columns) and periods (also known as rows). Elements within the same group share similar chemical properties because they have the same number of valence electrons. Valence electrons are the electrons in the outermost energy level of an atom and play a crucial role in determining an element's chemical behavior.
The periodic table is arranged in such a way that elements in the same group have the same number of valence electrons, leading to similar chemical properties. For example, elements in Group 1 (such as hydrogen, lithium, sodium, and potassium) all have one valence electron, which makes them highly reactive metals that readily lose that electron to form positive ions. Similarly, elements in Group 17 (such as fluorine, chlorine, bromine, and iodine) all have seven valence electrons, making them highly reactive nonmetals that readily gain one electron to achieve a stable electron configuration.
Periodic trends, such as atomic radius, ionization energy, and electronegativity, also contribute to the similarity of chemical properties within a group. These trends affect how atoms interact with each other during chemical reactions.
Elements that are in the same group of the periodic table tend to exhibit similar chemical properties due to their shared number of valence electrons. This similarity arises from the periodic trends and influences how elements interact with other substances, leading to the formation of compounds and the manifestation of specific chemical behaviors.
Learn more about tendency ,visit;
https://brainly.com/question/32182452
#SPJ11
Which of these changes is a chemical change?
A. A block of ice forms liquid water when salt is sprinkled on it.
B. A block of ice is crushed into small pieces.
C. A block of ice melts when heated.
D. A block of ice fizzes and forms a gas when sodium is sprinkled on
it.
please help :)
What is the activation energy for the isomerization of methyl isocyanide? Rate Constant Temperature 472 K 4.30 X 10-3 min-1 503 K 5.54 x 10-2 min-1
The activation energy for the isomerization of methyl isocyanide is 77.6 kJ/mol.
The activation energy for the isomerization of methyl isocyanide can be determined using the Arrhenius equation. The equation relates the rate constant, activation energy, and temperature.
The Arrhenius equation is given by:
k = Ae^(-Ea/RT)
wherek = rate constant
A = pre-exponential factor (frequency factor)
Ea = activation energy
R = universal gas constant
T = temperature
R = 8.314 J/mol.
KEa = (-R ln(k2/k1))/(1/T2 - 1/T1)
Where k2 and k1 are the rate constants at temperatures T2 and T1, respectively.
For the given data,T1 = 472 K, T2 = 503 K, k1 = 4.30 × 10-3 min-1, k2 = 5.54 × 10-2 min-1.
Substituting these values in the equation for Ea:
Activation energy (Ea) = (-8.314 J/mol.K) ln (5.54 × 10-2 min-1 / 4.30 × 10-3 min-1) / (1/503 K - 1/472 K) = 77,600 J/mol = 77.6 kJ/mol
Therefore, the activation energy is 77.6 kJ/mol.
To know more about "isomerization" visit: https://brainly.com/question/30826771
#SPJ11
What is SI unit of volume
Answer:
The SI unit of volume is m³
write 2-3 sentences to describe the bond length and bond energy of carbon-carbon bonds in single, double, and tripple bonds
The bond length in carbon-carbon single bonds (C-C) is longer than that in double (C=C) and triple (C≡C) bonds, as they involve the sharing of one electron pair, while double and triple bonds share two and three electron pairs, respectively.
The bond length and bond energy of carbon-carbon bonds differ based on the type of bond they form. In a single bond, the carbon-carbon bond length is longer at 0.154 nm and has a bond energy of 348 kJ/mol. In a double bond, the carbon-carbon bond length is shorter at 0.134 nm and has a bond energy of 611 kJ/mol.
In a triple bond, the carbon-carbon bond length is even shorter at 0.120 nm and has a bond energy of 837 kJ/mol. These differences in bond length and bond energy are due to the increase in the number of shared electrons between carbon atoms in double and triple bonds.
In contrast, bond energy increases as the bond order rises; C-C single bonds have the lowest bond energy, while C≡C triple bonds possess the highest bond energy due to the stronger attractive forces between the bonded carbon atoms. Overall, carbon-carbon bonds exhibit a relationship where bond length decreases and bond energy increases as the number of shared electron pairs rises.
To know more about bond length and bond energy, refer to the link below:
https://brainly.com/question/2705237#
#SPJ11
when solutions of silver nitrate and magnesium chloride are mixed, silver chloride precipitates out of solution according to the equation 2AgNO3(aq) +MgCl2(aq) -> 2AgCl(s) + Mg(NO3)2(aq)
Part A what mass of silver chloride can be produced from 1.70L of a .223M solution of silver nitrate?
Part B The reaction described in Part A required 3.65L of magnesium chloride. What is the concentration of this magnesium chloride solution?
A) The mass of silver chloride that can be produced is 54.32 g.
B) The concentration of the magnesium chloride solution is equal to its original concentration, which is not given in the question.
Part A: To determine the mass of silver chloride produced, we need to use the balanced equation to relate the moles of silver chloride to the moles of silver nitrate.
From the balanced equation, we can see that 2 moles of silver nitrate produce 2 moles of silver chloride. Therefore, the molar ratio of silver nitrate to silver chloride is 1:1.
Given the volume of the silver nitrate solution is 1.70 L and the concentration is 0.223 M, we can calculate the moles of silver nitrate:
moles = volume × concentration = 1.70 L × 0.223 M = 0.3791 moles
Since the molar ratio is 1:1, the moles of silver chloride produced will also be 0.3791 moles.
To calculate the mass of silver chloride, we need to use its molar mass. The molar mass of AgCl is approximately 143.32 g/mol.
mass = moles × molar mass = 0.3791 moles × 143.32 g/mol = 54.32 g
Part B: The volume of magnesium chloride solution required is 3.65 L. To find the concentration of the magnesium chloride solution, we can use the balanced equation to relate the moles of magnesium chloride to the moles of silver nitrate.
From the balanced equation, we can see that 1 mole of magnesium chloride reacts with 2 moles of silver nitrate. Therefore, the molar ratio of magnesium chloride to silver nitrate is 1:2.
Given the volume of magnesium chloride solution is 3.65 L, we need to determine the moles of magnesium chloride.
moles of MgCl2 = volume × concentration = 3.65 L × concentration
Since the molar ratio is 1:2, the moles of silver nitrate will be twice the moles of magnesium chloride.
moles of AgNO3 = 2 × moles of MgCl2 = 2 × (3.65 L × concentration)
The concentration of the magnesium chloride solution can be calculated by rearranging the equation:
concentration = moles of AgNO3 / (2 × volume) = (2 × 3.65 L × concentration) / (2 × 3.65 L) = concentration
To learn more about silver chloride visit;
https://brainly.com/question/14740494
#SPJ11
How many Coulombs are in 4×10
4
electrons? (6×10
−15C
)
There are 6.4 × 10⁻¹⁵ Coulombs in 4 × 10⁴ electrons.
To convert the number of electrons to coulombs, we need to first multiply the number of electrons by the charge of a single electron
No. of electrons × Charge of single electron
Charge of single electron = 1.6 × 10⁻¹⁹ coulombs
Calculating using the above formula
we get: 4 × 10^4 electrons × 1.6 × 10⁻¹⁹ C/electron = 6.4 × 10⁻¹⁵ Coulombs
To know more about Electrons refer to this link
https://brainly.in/question/374445
sulfur trioxide decomposes to form sulfur dioxide and oxygen, like this:(g)(g)(g)write the pressure equilibrium constant expression for this reacti
The pressure equilibrium constant expression for the decomposition reaction of sulfur trioxide (SO3) to form sulfur dioxide (SO2) and oxygen (O2) can be written as follows: Kp = (pSO2 * pO2) / pSO3
In this equation, pSO2 represents the partial pressure of sulfur dioxide, pO2 represents the partial pressure of oxygen, and pSO3 represents the partial pressure of sulfur trioxide. The pressure equilibrium constant, Kp, is a ratio of the partial pressures of the products (SO2 and O2) to the partial pressure of the reactant (SO3) at equilibrium. It provides information about the position of the equilibrium and the relative amounts of the substances involved.
To determine the value of Kp, you would need to measure the partial pressures of sulfur dioxide, oxygen, and sulfur trioxide at equilibrium. Then, you can substitute these values into the equation to calculate the Kp value. It's important to note that the Kp value for a reaction depends on the temperature at which the reaction occurs.
To know more about equilibrium visit:
brainly.com/question/20595436
#SPJ11
Danny is making iced tea. He keeps adding and mixing sugar into the tea until he starts to see sugar settle at the bottom of the glass. He stops adding sugar and keeps mixing, but the sugar does not dissolve.
Why does the sugar NOT dissolve in the tea?
Read Passage
A
The tea is no longer a solvent.
B
The solubility has been changed.
C
The solution has become saturated.
D
The sugar has become unsaturated.
Answer:
C: The solution has become saturated.
Explanation:
The sugar is not dissolving in the tea because the solution has become saturated. Saturation occurs when the concentration of solute (sugar) in a solvent (tea) has reached its maximum limit, beyond which no more solute can dissolve. At this point, the undissolved solute will settle at the bottom of the container. In this case, the tea is unable to dissolve any more sugar, so it stays at the bottom of the glass.
Answer:
C
Explanation:
What are the answers for this
Answer:
Solid:
shape: definite
volume:definite
closeness...: tightly packed
motion ..: vibrate in their position
liquid:
shape: indefinite
volume: definite
closeness: loosely packed
motion... : slide past each other
gas:
shape: indefinite
volume: indefinite
closeness: far apart
motion..: random movement
Explanation:
hope this helped you .. please mark as brainliest
Which two of the minerals shown have a metallic luster?
Answer:
A and D
Explanation:
Answer:
A & D
Explanation:
How many grams are in a sample of 11.1 mol of NaNO3?
Answer: 84.99467 grams in one mole of NaNO3
Explanation:
This compound is also known as Sodium Nitrate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaNO3, or 84.99467 grams.
What’s the type of reaction and word equation for: C2H6O+2O2= 2CO2 + 3H2O
Answer:
Ethenol + Oxygen = water + Carbon Dioxide C2H5OH + 3O2 = 2CO2 + 3H2O
Explanation:
Arrange the elements in order of increasing ionization energy. chlorine, fluorine, gallium, phosphorus
Answer: Ga, P,Cl, F
Explanation:
Cl 1314 kJ/mole
F 1681 kJ/mole
Ga 579 kJ/mole
P 1012 kJ/mole
A sample of radon gas has a volume of 0.650 L at a temperature of -55.0 C. What volume will the gas occupy at 40.0 C, assuming constant pressure?
Answer:
0.933 L
Explanation:
Since the pressure is the same, we use the equation \(\frac{V_{1}}{T_{1} } = \frac{V_{2} }{T_{2} }\)
V = Volume
T = Temperature
Since we are given the temperature in Celsius, we need to convert it to Kelvin by adding 273:
-55.0 + 273 = 218
40.0 + 273 = 313
\(\frac{0.650}{218} = \frac{x}{313}\)
\(0.933 = x\)
The gas will occupy a volume of 0.933 L.
(Side note - If the temperature increases, the gas will want to expand, leading to a higher volume.)
how do I balance this?
Answer:
4NaHCO3---->2Na2CO3+2CO2+2H2O
Cylinder A contains a gas whose molecules have an average speed of 0.0000001 meters/sec. Cylinder B contains a gas whose molecules have an average speed of 0.3 meters/sec. Select the statement below that is true regarding these cylinders. options: Cylinder A contains a gas that has a temperature closest to absolute zero. Even though the molecules are moving at different speeds in the two cylinders, they have the same kinetic energy. Cylinder B contains molecules that are moving more slowly than the molecules in Cylinder A. Cylinder B contains a gas that has a temperature closest to absolute zero.
Answer:
The correct option is;
Cylinder A contains a gas that has a temperature closest to absolute zero
Explanation:
From the kinetic theory of gases, the average speed of a gaseous molecule is found from the following equation;
\(v_{rms} = \sqrt{\frac{3\cdot R \cdot T}{MW} }\)
Where:
\(v_{rms}\) = rms speed which is the square root of the average of the velocities of the gas molecules squared which is used in place of the average of the gas molecules as the sum of the velocities of all the gas molecules in the cylinder is zero
R = Universal gas constant = 8.3145 J/(mol·K)
MW = Molecular weight of the gas
Hence where we have;
\(v_{rmsA}\) = Average velocity of gas A = 0.0000001 m/s
\(v_{rmsB}\) = Average velocity of gas B = 0.3 m/s
Since, R and MW are constant for the gas in cylinder A constant, therefore, as \(v_{rmsA}\) ≈ 0 m/s, the temperature, \(T_A\), of gas A is closest to absolute zero.
What is the volume of kristas rock
Answer : The volume of kristas rock is 30 mL.
Explanation :
From the given image we conclude that:
Initial volume of liquid = 150 mL
Final volume of liquid = 180 mL
Now we have to determine the volume of kristas rock.
Volume of kristas rock = Final volume of liquid - Initial volume of liquid
Volume of kristas rock = 180 mL - 150 mL
Volume of kristas rock = 30 mL
Therefore, the volume of kristas rock is 30 mL.
How can you drop two eggs the fewest amount of times, without them breaking? Whoever gets this right I will mark them brainlyest. (don't know if I spelled that right)
Answer:
Okay well simply drop it from one inch on to the ground and it won't break and you could put it into a basket with bubble wrap.
Explanation:
Well if you wrap the egg into bubble wrap a few times them put it into a basket (its your choice) then it won't break because the bubble wrap will just pop a few times but sometimes it depends on where you are dropping it from.
Have a blessed day bye! ;)
What is the number of moles of c that must completely react to produce 2. 0 moles of c2h6?.
The required number of moles of C that must fully react to produce 2. 0 moles of \(C_{2} xH_{6}\) is 2.
The balanced equation for the reaction of carbon (C) and hydrogen (H2) to produce ethane (C2H6) is:
C + 2H2 -> C2H6
From the balanced equation, we can see that for every 1 mole of carbon that reacts, 2 moles of hydrogen are also required. Therefore, in order to produce 2 moles of C2H6, we need 2 moles of hydrogen.
Since the balanced equation states that for every 1 mole of C we need 2 moles of H2, we can say that we need 2*2 =4 moles of hydrogen.
So the number of moles of C that must completely react to produce 2.0 moles of C2H6 is 2 moles.
You can learn more about moles at
https://brainly.com/question/15356425
#SPJ4
An aqueous solution is 40.0% by mass silver nitrate, AgNO3, and has a density of 1.47 g/mL.
The molarity of silver nitrate in the solution is
M.
Answer:
Molarity = 3.46 M
Explanation:
Given data:
Percentage of silver nitrate = 40.0%
Density of AgNO₃ = 1.47 g/mL
Molarity of solution = ?
Solution:
40% means out of 100g we have 40 g of AgNO₃ and 60g solvent.
Number of moles of silver nitrate = mass /molar mass
Number of moles = 40 g/ 170 g/mol
Number of moles = 0.235 mol
Volume of solution:
Total mass of solution = 100 g
density = 1.47 g/mL which means there are 1.47 gram into 1 mL.
100 g/1 × 1mL/ 1.47 g × 1 L / 1000 mL
0.068 L
Molarity:
Molarity = number of moles / volume in L
Molarity = 0.235 mol / 0.068 L
Molarity = 3.46 M
Which of the following is the correct equation for the reaction below?
One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.
A. CzHg (g) + 502 (9) ► 3C02 (9) + 4H20 (9)
B. C3Hg (s) + 502 (s) — 3CO2 (s) + 4H20 (3)
C. CH (9) + 502 (9) — 3C02 (9) + 4HO (9) D. CzHg (9) + 50 (g) → 3C0 (g) + 4H20 (9)
need asap
Answer:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Explanation:
One molecule of propane gas reacts with five molecules of oxygen gas to form three molecules of carbon dioxide gas and four molecules of water vapor.
To every chemical equation, there are products and reactants:
Reactants → Products
Here:
Reactants:
1 mole of propane = C₃H₈
5 mole of oxygen gas = 5O₂
Products;
3 mole of CO₂ = 3CO₂
4 moles of water vapor = 4H₂O
The reaction equation is therefore;
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Answer:
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)
Explanation:
This is the actual answer
phosphorous can be prepared by electrolysis of an aqueous phosphate solution
Phosphorus can be prepared by electrolysis of an aqueous phosphate solution. The method of extraction of phosphorus from the phosphate solution involves the process of electrolysis.
The electrolysis process is defined as a process in which a chemical reaction is caused by an electric current passing through an electrolyte. The electrolysis of the aqueous solution of phosphate is the process in which phosphorus is extracted from the solution. The procedure of electrolysis of an aqueous phosphate solution is as follows: Two electrodes are placed into the phosphate solution, one is the anode (positive electrode) and the other is the cathode (negative electrode). The anode is made up of graphite and the cathode is made up of mercury. A direct current is then passed through the solution. When the current is passed, it causes the oxygen to be released at the anode, which combines with graphite to produce carbon dioxide.
In addition, at the cathode, hydrogen gas is released along with mercury, and the mercury is mixed with the phosphorus to produce an alloy. The mixture is then filtered, and the impurities are removed with the help of hydrochloric acid. The obtained phosphorus is solid and can be melted and moulded into sticks. The process of electrolysis is a good method for the extraction of phosphorus from aqueous solutions and the process is economically viable. This process is also good because the phosphate solution can be obtained from rock phosphates, and this process is a good alternative to the use of non-renewable phosphorus sources. The main advantages of this process are that it is cost-effective, does not require high temperatures, and is environmentally friendly.
know more about electrolysis.
https://brainly.com/question/12994141
#SPJ11
When atoms or molecules absorb ______________, it is often released as _____________________.
When atoms or molecules absorb energy, it is often released as light energy
What is the light energy?Light energy is a type of electromagnetic radiation. The fundamental units of light, photons, are produced when an object's atoms become heated.The only type of energy that is visible to the human sight is light, which moves in waves. The constituent parts of light are called photons, which resemble tiny energy packets.The movement of atoms results in the production of photons when an object's atoms heat up. More photons are generated when an object is hotter. Waves are the form in which light energy moves. Nothing travels more quickly than light energy, which is extremely fast.The electrons inside the atoms get more "excited" by heat, which gives them more energy.To know more about light energy ,refer:
https://brainly.com/question/2746743
#SPJ4
Ag2S(s) has a larger molar solubility than CuS even though Ag2S has the smaller Ksp value. Explain how this is possible.
Even though Ag2S has a smaller Ksp value, its molar solubility is larger due to the stoichiometry of its dissolution reaction thats why Ag2S(s) has a larger molar solubility than CuS even though Ag2S has the smaller Ksp value.
The molar solubility of a compound is the maximum amount of solute that can dissolve in a given amount of solvent. The solubility of a compound depends on its Ksp value and the conditions of the solution. Ksp is the equilibrium constant for the dissolution of a solid in a solution. It represents the product of the concentrations of the ions produced when the solid dissolves.
In the case of Ag2S and CuS, although Ag2S has a smaller Ksp value compared to CuS, it has a larger molar solubility. This is because the solubility of a compound also depends on the nature of the ions produced when it dissolves.
When Ag2S dissolves in water, it produces Ag+ and S2- ions. These ions are highly hydrated, which means they are surrounded by water molecules. This hydration decreases the attraction between the ions and prevents them from re-associating to form the solid. As a result, more Ag2S can dissolve in the water, giving it a larger molar solubility.
On the other hand, when CuS dissolves in water, it produces Cu2+ and S2- ions. These ions are not as highly hydrated as Ag+ and S2- ions. Therefore, they have a stronger attraction to each other, which makes it harder for them to stay in the solution. As a result, CuS has a smaller molar solubility compared to Ag2S, even though it has a larger Ksp value.
In summary, the molar solubility of a compound depends not only on its Ksp value but also on the nature of the ions produced when it dissolves. The more highly hydrated the ions are, the more soluble the compound will be.
Hi! The observed phenomenon can be explained by examining the molar solubility and the stoichiometry of the dissolution reactions for Ag2S and CuS.
Ag2S has a smaller Ksp value, which indicates that it is less soluble in water than CuS. However, when Ag2S dissolves, it dissociates into two moles of Ag+ ions and one mole of S2- ions:
Ag2S(s) ⇌ 2Ag+(aq) + S2-(aq)
On the other hand, CuS dissociates into one mole of Cu2+ ions and one mole of S2- ions:
CuS(s) ⇌ Cu2+(aq) + S2-(aq)
The molar solubility of a substance is the number of moles of the substance that can dissolve in a liter of water. Since Ag2S produces two moles of Ag+ ions for every mole of Ag2S that dissolves, its molar solubility is higher than that of CuS, which only produces one mole of Cu2+ ions for each mole of CuS that dissolves.
Learn More about stoichiometry here :-
https://brainly.com/question/30215297
#SPJ11