The [OH-] of the 0.025 M weak acid solution will be equal to the pKA of the acid, 4.615.
What is weak acid solution?
A weak acid solution is a solution that contains an acid that is not completely ionized in water. Weak acids, such as acetic acid, have pH values between 4.5 and 6.0. These acids are not strong enough to completely break apart in water, leaving some of the molecules still intact. Because of this, weak acids form molecules that can react with other molecules, such as bases, in solution.
This is because the equilibrium of the acid dissociation reaction is reached with the same concentration of acid and its conjugate base in solution. The [H3O] will be equal to 0.025 M, as the acid is in dissociation equilibrium with its conjugate base. The pH of the solution can be calculated by taking the negative log of the [H3O], which will be 1.59. The pOH can be calculated by taking the negative log of the [OH-], which will be 4.615.
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The element in this list with chemical properties similar to magnesium is:
Answer:
Calcium" is the element which has similar chemical properties to magnesium .
What atomic or hybrid orbitals make up the sigma bond between s and cl in sulfur dichloride, scl2?
Two Cl-atoms form a sigma bond with sp3 hybrid orbitals. Thus, SCl2 has sp3 hybridization.
The Lewis structure shows us that the carbon atom makes 4 sigma bonds to hydrogen and has no non-bonding electron pairs. The central carbon atom combines its 2s, 2px, 2py, and 2pz valence orbitals to make four, 2sp3 hybrid orbitals. Each one of these combines with a 1s atomic orbital from a hydrogen atom.
What is hybridization of SCl2?
In its most stable state, Sulfur acts as the central atom and forms two covalent bonds with the Chlorine atoms. It also possesses two lone pairs. Due to the presence of 4 electron domains and its steric number being 4, the hybridization of SCl2 is given by sp3.
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Find the hydroxide concentration of a LiOH soultion that has a pOH of 8.65.
[OH] = _____ (round to 2 decimal places)
Answer: i need help
Explanation:
54. Given the density of lead to be 11.4 g/cm' and a sample mass of 32 g what is the volume of this sample of
lead?
how many grams of sulfur make up 1.55 mol of sulfur?
49.70075 grams of sulfur make up 1.55 mol of sulfur. Sulfur atoms have masses of 32.07 amu and 32.07 g per mole, respectively.
G/mol units are the starting point for calculating molar mass. We can find out how many grams make up one mole of a chemical molecule by computing its molecular weight. The weight of a particular formula is just the sum of the atomic masses of all the constituent parts.
The National Institute of Standards and Technology, or NIST, provided the atomic weights used on this website. We employ the most typical atoms. This is how isotropically weighted averages are used to determine the molar mass (average molecular weight). This differs from molecular mass, which is the weight of a singular molecule made up of distinct isotopes. For computations involving bulk stoichiometry, Typically, we are calculating molar mass, also known as normal atomic weight or average atomic masses.
1 gram of sulfur equals how many moles? 0.031186652112896 is the correct response.
It is assumed that you are changing between grams and moles of sulfur.
sulfur's chemical weight in grams
Sulfur's chemical formula is S.
The mole is the SI base measure for substance amount.
Sulfur has a molecular weight of 1 mole, or 32.065 grams.
Rounding errors could happen, so make sure to always double-check your findings.
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Write some of the chemical and physical properties and uses of each natural resource shown in the photos below.
When you touch an object, why do you feel hot or cold?
Answer:
When two different objects touch heat is always transferred from the warmer object to the colder object. If you touch something hot, energy is transferred from the hot object to you.
Explanation:
10. how does the movement of electrons along the electron transport chain lead to the generation of a proton gradient?
One electron goes to Fe-S and then cytochrome c, while the second electron is transferred to cytochrome b and then to CoQ bound at the other site.
While this occurs, 2 H+ ions are launched into the intermembrane space, contributing to the proton gradient. The ETC is a set of proteins certain to the internal mitochondrial membrane and natural molecules, which electrons byskip thru in a sequence of redox reactions, and launch power. The power launched bureaucracy a proton gradient, that's utilized in chemiosmosis to make a huge quantity of ATP through the protein ATP-synthase.
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How many particles are in 5.00 grams of nitric acid?
Answer:
0.0500
Explanation:
The Calories on a food label indicate the
amount of energy the food contains in
one serving. Which form of energy is
contained in food?
Answer:
chemical energy
Explanation:
how many atoms are contained in 2.70g of aluminum provided that 32g of sulphur equals 6.02 × 10^(23)atoms
Answer:
\(1.63 \times {10}^{24} \)
one atom of an element = 6.02 \times {10}^{23} atom
The mass of one atom of sulphur = 32g
The mass of one atom of aluminium = 27g
so one atom of aluminium = 6.02 \times {10}^{23}
27g of AL = 6.02 \times {10}^{23} atom
2.70g of AL = X atoms
Then you cross multiply ........
and get the answer
.
Which are signs of Chemical Change (pick all that apply)
Color Change
Gas Formation
Solid Formation
Liquid Formation
Energy Change
might be gas change or colour change
5- Charlotte throws 5 darts and they all end up in the outer ring of the dart board. Describe her:
Precision-ne Shot
Accuracy:
The Charlotte throws 5 darts and they all end up in the outer ring of the dart board is they are neither precise nor accurate.
Precise is defined as how close the measurement are with one another. Accuracy is defined as how the measurement is close to the correct value. if all the dart is close to each other but not on bullseye than it is high precise and low accurate. if the the dart are in the bullseyes and close to each other it is said to be high precise and high accurate.
Thus, The Charlotte throws 5 darts and they all end up in the outer ring of the dart board is they are neither precise nor accurate.
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What's the theoretical yield of oxygen from the oxides present in 1. 00 kg sample of lunar soil?
The theoretical yield of oxygen from the oxides present in a 1.00 kg sample of lunar soil will depend on the composition of the soil. However, we can make some assumptions based on the known composition of lunar soil.
Lunar soil is known to contain various oxides, including silicon dioxide (SiO2), aluminum oxide (Al2O3), iron oxide (FeO and Fe2O3), titanium dioxide (TiO2), and others. These oxides can be chemically processed to release oxygen gas.
The stoichiometry of the chemical reactions involved will depend on the specific oxides present in the soil. However, for the purposes of estimation, we can assume that all the oxides present in the soil are converted to their respective metals and oxygen gas.
For example, the reaction for the conversion of silicon dioxide to silicon metal and oxygen gas is:
SiO2(s) + 2 C(s) → Si(s) + 2 CO(g)
From this reaction, we can see that for every 1 mole of SiO2, 1 mole of oxygen gas is produced. The molar mass of SiO2 is 60.08 g/mol, so in a 1.00 kg sample of lunar soil, there are:
1000 g / 60.08 g/mol = 16.65 moles of SiO2
Therefore, the theoretical yield of oxygen gas from the SiO2 present in the soil is:
16.65 moles of O2 (since 1 mole of SiO2 produces 1 mole of O2)
Similarly, we can calculate the theoretical yield of oxygen gas from the other oxides present in the soil using their respective stoichiometric equations. Adding up the oxygen yields from each oxide will give us the total theoretical yield of oxygen from the soil.
Note that the actual yield of oxygen will likely be less than the theoretical yield due to inefficiencies and losses during the processing of the soil.
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When a liquid is heated, the average (blank) energy of its
particles will increase.
Answer:
trueee is the answer heh need points
When a liquid is heated, the average kinetic energy of its particles will increase.
What is Energy?The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.
Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.
Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.
Average kinetic energy = 3KT/2
If temperature increases, kinetic energy also increases.
Therefore, When a liquid is heated, the average kinetic energy of its particles will increase.
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two kilogram of nasialo4 zeolites are used in a water filter to remove calcium. after complete ion exchange the zeolite is removed from the filter and weighed. what is the new weigh of the zeolite [answer in kilogram]
After ion exchange with zeolite in water filter to remove calcium by substitute natrium ion with calcium ion, the weight of zeolite become 1.9578 kg.
ion exchange calculation can be done by using basic stoichiometry if we know how the reaction of the ion exchange. In this case where zeolite with natrium ion will be exchanged with calcium. The reaction of exchange will be like this:
\(2NaSiAlO_{4} + Ca^{2+}\) ⇒ \(Ca(SiAlO_{4}) _{2} + 2Na^{+}\)
Calculate the molecule weight of both zeolite
Atomic weight data:
Na = 23 gram/mole
Si = 28 gram/mole
Al = 27 gram/mole
O = 16 gram/mole
Ca = 40 gram/mole
Molecule weight
\(NaSiAlO_{4}\) = 142 gram/mole
\(Ca(SiAlO_{4}) _{2}\) = 278 gram/mole
Calculate mole from 2kg of zeolite with natrium :
2000 gram/ 142 = 14.0845 mole
Based on the stoichiometry, we got the mole of zeolite with calcium:
14.0845 mole x 1/2 = 7.0423 mole
Weight of zeolite after the ion exchanged with calcium:
7.0423 mole x 278 = 1957.8 gram = 1.9578 kg
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why are carcinogens a concern to people?
Answer:
Bcoz the carcinogenes damage the genome or to the disruption of cellular metabolic processes
Explanation:
Answer:
Carcinogens may increase the risk of cancer by altering cellular metabolism or damaging DNA directly in cells, which interferes with biological processes, and induces the uncontrolled, malignant division, ultimately leading to the formation of tumors.
Explanation:
50 cm3 of sodium hydroxide solution was titrated against a solution of sulfuric acid. The concentration of the sodium hydroxide solution was 20 g/dm3. Work out how many moles there were in 50 cm3 of this solution.
The number of moles of the 50 cm³ of this solution is 1500.
The moles of sodium hydroxide required to neutralize 1 mole of sulfuric acid have been 2 mol.
The chemical equation for the titration of sodium hydroxide against sulfuric acid has been:
NaOH + H₂SO₄ → Na₂SO₄ + H₂O
The balanced chemical equation is
2NaOH + H₂SO₄ → Na₂SO₄ + H₂O
From the balanced chemical equation, for the titration of 1 mole of sulfuric acid, 2 moles of sodium hydroxide has been required.
The moles of sodium hydroxide required for the titration of sulfuric acid has been:
1 mol of H₂SO₄ = 2 mol of NaOH
the concentration of sodium hydroxide solution is 20 g/dm³.
volume = 50
With the above data we know that the volume of NaOH is 50 so the volume of H₂SO₄ is 25 and the total volume is 75 cm³.
We know that concentration = moles/ volume
Moles = concentration * volume
Moles = 20 * 75 = 1500
Therefore, the number of moles of the 50 cm³ of this solution is 1500.
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An example of gamma radiation
To find the density of an irregular object, what method should be used?
Answer:
You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up. You can use this relation backwards too -- if you know what material an object is made of, you can look up its density in a book. hOPE THIS HELPS! =)
What is the molarity of 0.25 moles of KBr dissolved into 250 ml of solution?
Answer: 1.0 M
Explanation:
250 mL = 0.25 L
molarity = (moles of solute)/(liters of solution) = 0.25/0.25 = 1.0 M
what is the structure of sodium stearate
Answer:
C18H35NaO2
Explanation:
Online
what is the volume of 3 moles of methane (ch4)? (one mole of any gas occupies 22.4 l under certain conditions of temperature and pressure. assume those conditions for this question.)
Three moles of methane have a volume of 67.2 L.
The area occupied by gaseous particles under normal temperature and pressure circumstances is referred to as the volume of gas. It is identified as a "V." The letter "L" stands for "liters," the SI unit of volume. At normal temperature, a mole of gas has a volume of 24 \(m^{3}\), or 24 000 \(cm^{3}\).
While gases lack a distinct structure, unlike solids and liquids, they also lack a distinct volume. Typically, a substance's volume is not considerably altered when it transitions from solid to liquid.
3 mole Equals 1 mole of methane gas.
Given that, at specific temperatures and pressures, 1 mole of any gas takes up 22.4 L of space.
The volume that 3 mole of meta he gas takes up will then be
3 × 22.4 = 67.2L
67.2 L is the volume of 3 moles of methane.
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6
What is the density of a substance that has a mass of 2.0 g, and when placed in a graduated cylinder
the volume changed from 70 mL to 75 mL?
A 2.5 g/mL
B 7.0 g/mL
C 10. g/mL
D 0.40 g/mL
The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)
How do I determine the density of the substance?First, we shall obtain the volume of the substance. This can be obtained as follow:
Volume of water = 70 mL Volume of water + substance = 75 mL Volume of substance =?Volume of substance = (Volume of water + substance) - (Volume of water)
Volume of substance = 75 - 70
Volume of substance = 5 mL
Finally, we shall determine the density of the substance. This is illustrated below:
Mass of substance = 2.0 gVolume of substance = 5 mLDensity of substance = ?Density = mass / volume
Density of substance = 2 / 5
Density of substance = 0.4 g/mL
Thus, the density is 0.4 g/mL (Option D)
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Which statement accurately describes the chemical symbol of an element?
The chemical symbol is always a single letter.
The chemical symbol always starts with the same letter as the name of the element.
The chemical symbol always begins with a capital letter.
The chemical symbol can be shared by more than one element.
Answer:
always begins with a capital letter
Explanation:
quizlet
giving brainly if correct
Answer:
Explanation:
Most molecular compounds that have a mass similar to water are gases at room temperature. Because of the strong hydrogen bonds, water molecules are able to stay condensed in the liquid state, but, because of the hydrogen bonds, as water molecules come together they stick to one another for a small, but significant amount of time. Molecular water, therefore, is a liquid at room temperature
Help please!! I'll name you brainliest!!
Answer:
MgO
Explanation:
Predict the products when 1-propanol is heated in the presence of an acid? There are two products. I have one of them 1-propene, what is the second product?
When 1-propanol is heated in the presence of an acid, the reaction produces two products: 1-propene and water.
This reaction is known as an ether cleavage, and it is commonly used in the production of propene and other hydrocarbons.
It is an exothermic reaction, meaning that the heat generated from the reaction increases the rate of the reaction.
The other product of this reaction is water, which is produced when hydrogen from the 1-propanol molecule is removed and replaced with a hydroxyl group.
This reaction is an example of an acid-catalyzed dehydration, where an alcohol molecule is converted into an alkene molecule by the removal of the OH group and the addition of a hydrogen atom from the acid. The overall reaction is: C3H7OH + H2O → C3H6 + H3O+.
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pls help i am desperate
Answer:
can't see
Explanation:
What are two external structures that help a frog survive?
Answer:
muscular jumping leg (helps them escape predators, chase after prey), webbed foot (helps them live in both aquatic and land environments), and they can store poison (that is used to attack or defend) in their glands
Explanation:
:)