The solution of 12.0 M HCl and to prepare 300 mL of a 0.6 M solution , the initial volume is 0.015 L.
given that :
Molarity M1 = 12.0 M
volume V1 = ?
Molarity M2 = 0.6 M
Volume V2 = 300 mL = 0.3 L
The dilution law is given as :
M1 V1 = M2 V2
12.0 × V1 = 0.6 × 0.3 L
V1 = 0.18 / 12
V1 = 0.015 L
Thus, The solution of 12.0 M HCl and to prepare 300 mL of a 0.6 M solution , the initial volume is 0.015 L.
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17. 1s² 2s² 2p 3s² 3p6 4s² 3d¹0 4p65s¹ symbol?
11.How much water must be added to 15 mL of sodium chloride solution 23.4% to dilute the concentration to 0.06 mmol/mL? (MW NaCl = 58.44)
The volume of water that must be added to 15 mL of sodium chloride solution 23.4% to dilute the concentration to 0.06 mmol/mL is 999985 mL.
What is the concentration of 23.4% sodium chloride solution in mol/L?The concentration of 23.4% sodium chloride solution in mol/L is calculated as follows:
23.4% solution = 23.4 g/100 mL solution
23.4 g/100 mL = 234 g/L
Molarity = mass concentration / molar massmolar mass of NaCl = 58.5
Molarity of the NaCl solution = 234 / 58.5
Molarity = 4 mol/L
Using the dilution formula:
C₁V₁ = C₂V₂
where;
C₁ is the initial concentration = 4 mol/L or 4000 mmol/L
V₁ is the initial volume = 15 mL
C₂ is the final concentration = 0.06 mmol/L
V₂ is final volume = ?
V₂ = 4000 * 15 / 0.06
V₂ = 1000000 mL
Hence, the volume of water to be added will be:
1000000 - 15 = 999985 mL
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What is the balanced equation for this reaction, which takes place in a basic solution?
Cr(OH)3(s) + ClO3–(aq) → CrO42 (aq) + Cl–(aq)
Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 3CrO42–(aq) + 2Cl–(aq) + 2H2O(l)
Cr(OH)3(s) + 2ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 3H2O(l)
2Cr(OH)3(s) + ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 5H2O(l)
2Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 2CrO42–(aq) + 2Cl–(aq) + 7H2O(l)
The balanced equation for the redox reaction, which takes place in a basic solution is:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O; option CWhat is the balanced equation for the redox reaction?A balanced equation for a redox reaction is one in which the electrons transferred are balanced and the atoms involved in the reaction are also balanced.
To balance redox reactions in a basic solution, OH⁻ ions and H₂O are placed on appropriate sides of the reaction.
Considering the given reaction:
Cr(OH)₃ + ClO₃⁻ (aq) → CrO₄²⁻ (aq) + Cl⁻ (aq):
The balanced equation will be:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O
The electrons transferred and the atoms involved are balanced.
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is A2+C3H6->C3H6A2 an addition reaction?
Yes. The reaction is an addition reaction.
What are addition reactions?Addition reactions are reactions where 2 or more reactants combine to form a single product. Addition reactions are otherwise known as synthesis reactions because they often result in the synthesis of new molecules entirely.
Generally, addition reactions can be represented by the following equation:
A + B ---> AB
They are quite different from decomposition reactions in which a single product decomposes to form 2 or more products or substitution reactions in which an atom displaces another atom in a compound.
Thus, the reaction [tex]A_2 + C_3H_6 --- > C_3H_6A_2[/tex] is an addition reaction.
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what indicates the follwing percentage of the natural occurance of an isotope ofc an element
Natural abundance indicates the following percentage of the natural occurrence of an isotope of an element on the planet.
Natural abundance is defined as the relative amount of the isotopes of an element which occurs in nature. It is also known as geonormal abundance.
Natural abundance is also represented as percentage value.Relative atomic mass can be determined by using the natural abundance value of an isotope of an element.Relative atomic masses of any isotope can be easily determined if we know the atomic masses and their respective abundances.The formula to calculate the natural abundance of an element with two isotopes is given as :
x + (1 - x) = 1
Where,
x represents the fractional value of isotope-1 and 1 - x represents the fractional value of isotope-2.
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Hi! please help me identify the IUPAC name for the structures
The IUPAC names of the organic compounds would be as follows:
1. Methanol or 1-Methanol
2. Propan-2-ol or 2-Propanol
3. 2-MethylButane
4. 1-Hexanol
5. 1-Heptanol
Naming organic compoundsIn the naming of organic compounds, some fundamental rules come into practice. Some of these rules include:
The longest carbon chain, otherwise known as the parent chain, is considered.The substituents must be identifiedThe parent chain should be named such that the substituents are located on the lowest-numbered carbons. Repeated substituents are named accordingly.Different substituents are named alphabetically and substituents with lower alphabets are considered for the lowest-numbered carbons.Following these rules and more, the name of the organic compounds whose structures are shown in the image would be as follows:
Methanol or 1-MethanolPropan-2-ol or 2-Propanol2-MethylButane1-Hexanol1-HeptanolMore on IUPAC naming can be found here: https://brainly.com/question/16631447
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3. Look at the positions of calcium, beryllium, and magnesium on the periodic table. Based on
their locations, predict how many valence electrons these elements have and predict what
the reactivity of these elements will generally be.
Answer:
Reactivity of these elements as follow
Calcium > Magnesium > Beryllium
What is valance electron?
A valence electron is an electron connected with an atom and capable of participating in the formation of a chemical bond; in a single covalent connection, both atoms contribute one valence electron to form a shared pair. The existence of valence electrons can affect the element's chemical characteristics and ability to bind with other elements: a valence electron can only be in the outermost electron shell of a main group element.
The valence shell, also known as the valence orbital, is the orbital found in the atom's outermost area. These valence shells contain electrons known as valence electrons, which are responsible for the chemical process. When one electron is withdrawn or added to this valence shell, the basic goal is to complete the element's octet.
The elements beryllium (Be), magnesium (Mg), calcium (Ca), have two electrons in their valence shells, giving them an oxidation state of +2
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hcn is classified as a weak acid in water.this means that it produces
HCN is classified as a weak acid because it partially ionizes in water to produce hydrogen ions as the only positive ion.
What is an acid?There are several definitions for acids.
It is a substance that turns blue litmus paper to red when wet.It is any substance whose pH lies between 0 and 7.It is a substance that when ionizes in water, produces hydrogen ions as the only positive ion.HCN ionizes in water according to the following equation:
[tex]HCN < --- > H^+ + CN^-[/tex]
Because the HCN is only partially ionized and not a complete ionization, it is said to be a weak acid because hydrogen ion is still formed as the only positive ion.
Strong acids produce hydrogen ions as their only positive ions but are completely ionized in water, unlike weak acids.
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When 15.6 mL of 0.500 M Silver (1) Nitrate is added to 12.5 mL of 0.300 M
Ammonium chloride, how many grams of solid product (if any) formed?
Select one:
A. 0.537 g
B. 1.65 gx
C. NR
D. 1.11 g
The grams of solid product is 0.537 g.
Hence, Option A is correct.
The above equation can be solved by
The Symbol Ag used for Silver originates from the Latin word “Argentum
AgNO3 + NH4Cl ? AgCl + NH4NO3
(15.6 mL) x (0.500 M AgNO3) = 7.8 m mol AgNO3
(12.5 mL) x (0.300 M NH4Cl) = 3.75 m mol NH4Cl
7.8 m mol AgNO would react completely with 7.8 x (1/1) = 7.8 mol NH4Cl, but there is not that much NH4Cl present, so NH4Cl is the limiting reactant.
(3.75 m mol NH4Cl) / (1000 m mol/mol) x (1/1) x (143.3214 g AgCl/mol) = 0.537 g AgCl.
Hence, The grams of solid product is 0.537 g.
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Acetylsalicylic acid, C9H8O4, is the pain reliever in many
headache medications. A typical tablet contains 250.0 mg
of acetylsalicylic acid.
(a) Calculate the amount of acetylsalicylic acid in the tablet.
(b) Calculate the number of hydrogen atoms in the amount
of acetylsalicylic acid in the tablet determined in (a).
The amount of acetylsalicylic acid in the tablet is 0.001389 moles and the number of hydrogen atoms in the amount of acetylsalicylic acid in the tablet is 6.69 × 10²¹.
(a)
The formula of acetylsalicylic acid is C₉H₈O₄.
Molar mass of C₉H₈O₄ = 9 × atomic mass of C + 8 × atomic mass of H + 4 × atomic mass of O
= 9 × 12 + 8 × 1 + 4 × 16
= 108 + 8 + 64
= 180
No of moles of acetylsalicylic acid = Given mass / molar mass
= 0.25 / 180
= 0.001389
Hence, the number of moles of acetylsalicylic acid is 0.001389 moles.
(b)
Number of hydrogen atoms present in 1 mole of acetylsalicylic acid = 6.023 × 10²³ atoms
Number of hydrogen atom present in 0.001389 moles of acetylsalicylic acid = 0.001389 × 6.023 × 10²³ = 0.008365 = 8.36 × 10²⁰ atoms.
Now there are 8 hydrogen atoms in acetylsalicylic acid so,
Number of atoms of hydrogen in acetylsalicylic acid = 8 × 8.36 × 10²⁰ atoms = 6.69 × 10²¹ atoms.
Hence, the number of atoms of hydrogen in 0.001389 moles of acetylsalicylic acid is 6.69 × 10²¹ atoms.
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How many molecules are in 12.80 moles of strontium bydroxide?
77.094*[tex]10^{23}[/tex] molecules are in 12.80 moles of strontium bydroxide.
What does Sr OH 2's formula go by?The chemical strontium hydroxide has a molecular weight of 121.6324 g/mol and the molecular formula Sr(OH)2. It appears in the form of an anhydrate with prismatic, colorless crystals that are liquescent.
What fraction of atoms and molecules makes up NaOH?The building By counting the number of components (and their corresponding quantities) listed in the chemical formula, one can easily determine that each molecule of the compound NaOH contains three atoms.
By mole concept-
1moleof strontium bydroxide =6.023*[tex]10^{23}[/tex] molecules of strontium bydroxide.
so,
12.80 moles of strontium bydroxide =12.80*6.023*[tex]10^{23}[/tex]
No of molecule =77.094*[tex]10^{23}[/tex] molecule
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What mass of magnesium bromide is formed when 1.00 g of magnesium reacts with 5.00 g of bromine? Mg + Br2 MgBr2
From the mole ratio of the reaction, the mass of magnesium bromide formed when 1.00 g of magnesium reacts with 5.00 g of bromine is 2.88 g.
What is the mole ratio of the reaction between magnesium and bromine to form magnesium bromide?The mole ratio of the reaction between magnesium and bromine to form magnesium bromide is found in the equation of the reaction.
The equation of reaction is given below as follows:
Mg + Br₂₂---> MgBr₂Mole ratio of magnesium to bromine is 1 : 1
Moles of magnesium reacting = 1 / 24 moles
Moles of magnesium = 0.0416
Moles of bromine reacting = 5 / 180
moles of bromine reacting = 0.0277 moles
Bromine is the limiting reactant
Mass of magnesium bromide formed = 0.0277 * 104 g
Mass of magnesium bromide formed = 2.88 g
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what product is formed when magnesium undergoes combustion?
To solve such this we must know the concept of combustion reaction. Combustion reaction happens in presence of oxygen. Magnesium oxide is formed when magnesium undergoes combustion.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
When magnesium undergoes combustion, the magnesium oxide is formed.
2Mg+O₂[tex]\rightarrow[/tex]2MgO
Therefore, magnesium oxide is formed when magnesium undergoes combustion.
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What is the name of the compound CH3CH(CH3)C(CH3)3?
tetramethylpropane
2,2,3-trimethylbutane
isoheptane
1,1,1,2-tetramethylpropane
The molecular formula for the compound in the task given above is 2,2,3-trimethylbutane.
The correct answer choice is option b.
What is meant by the name or the molecular formula of a compound?The molecular formula of a compound is the name of the compound derived from its structural formula. From the task given above, the parent chain is butane. There are three different substituents groups; 2 different methyl group on carbon 2 and another methyl substituent at carbon 3.
The image to further illustrate the solution to the above problem is attached.
That being said, organic compounds are those compounds which contains carbon and hydrogen.
In conclusion, from the detailed explanation above, it can be deduced that the name of the compound above is 2,2,3-trimethylbutane
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Starch and cellulose have similar chemical structures, but differ in the _____.
substituents added to glucose monomers
orientation of bonds between glucose monomers
simple sugar that serves as a monomer
length of the monomer chain
Starch and cellulose have similar chemical structures, but differ in the orientation of bonds between glucose monomers.
Starch is glucose polymer in which repeating unit are connect by alpha bond and all the repeating unit are direct in one direction. starch is present in foods. it is less crystalline.
Cellulose is also a glucose polymer but cellulose units can be rotated around the axis of backbone of glucose polymer. cellulose is natural organic compound. glucose if formed by the combination of carbon, hydrogen , oxygen , .
Thus, Starch and cellulose have similar chemical structures, but differ in the orientation of bonds between glucose monomers
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What is the mass of an object that has a density of 2.2 g/ml and a volume of 6.0 mL
A piece of metal (mass = 25.0 g) at 95.0 °C is placed in a styrofoam coffee cup containing 25.0 mL of water at 18.2 °C. At thermal equilibrium, the temperature of the water is 25.4. Assuming that no heat is lost to the cup or the surroundings, what is the specific heat capacity of the metal? The specific heat capacity of water = 4.18 J/g°C.
The specific heat capacity of the metal can be calculated using the calorimeter equation. The specific heat capacity of the metal is obtained as 0.406 J/(°C g).
What is specific heat capacity?The specific heat capacity of a substance is the heat energy required to raise its temperature by one degree celsius per one gram of that substance.
The calorimeter equation relating heat energy q, mass m and temperature difference ΔT and specific heat capacity c is written as:
q = mcΔT.
In the given system the heat energy is transferred from the metal to water thus the final temperature of both will be 25 °C. Thus, at thermal equilibrium we can write it as:
25 g × c (95 -25 °C) = 25 × 4.18 × (25 - 18.2 °C )
Where, mass of water can be taken as 25 g since its density is 1 g/ml. From this specific heat capacity of the metal c is calculated as follows:
c = [ 25 × 4.18 × (25 - 18.2 °C ) ] / 25 g × (95 -25 °C)
= 0.406 J/(°C g).
Therefore, the specific heat capacity of the metal is 0.406 J/(°C g).
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Give the symbol of the element represented by the following abbreviated electron configuration.
[Ar]4s23d10
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Zinc is the element, that represents the given electronic configuration.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
In the given electron configuration [Ar]4s²3d¹⁰. Argon has 18 electrons. So, we have to add 12 electrons from s and d subshells to 18. The total number of electrons that we get on adding is 30. The element that corresponds to atomic number 30 is zinc that is Zn.
Therefore, Zinc is the element, that represents the given electronic configuration.
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The greatest distance across the moon's orbit is 772,000 km; the eccentricity of its orbit is 0.055. How far
apart are the foci of the moon's orbit?
14036363. 64 kmThe distance apart are the foci of the moon's orbit.
The Moon is Earth's handiest natural satellite tv for pc. it's miles the fifth largest satellite within the solar gadget and the biggest and big relative to its parent planet, with a diameter about one zone that of Earth.
The foci of the moon's orbit = 772,000 km/ 0.055
= 14036363. 64 km.
The Moon takes approximately one month to orbit Earth (27. three days to finish a revolution, but 29.5 days to alternate from New Moon to New Moon). because the Moon completes each 27. three-day orbit around Earth, each Earth, and the Moon are transferring across the solar.
The Moon orbits Earth inside the same course as our planet rotates. So, the Moon clearly acts from west to east through our sky, albeit so slowly that we almost by no means note it.
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Which of the atoms listed below has the largest radius?
A) AI
B) P
C) Si
D) Na
E) Mg
According to the given statement Na of the atoms listed below has the largest radius.
What is an atom?An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.
How are atoms made?Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.
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What is the possible chemical formula formed between Hydrogen ion and Nitrate
ion?
H₂NO3
H₂NO3
H3NO2
HNO3
what is the simplest formula of calcium Carbonate if it contains to 40% calcium,20% carbon, 48% oxygen?
The simplest form of calcium carbonate is CaCO3.
What is the use of Calcium carbonate?
Calcium carbonate can be used as a dietary supplement when the amount of calcium in a person's body is less. Calcium is used even as an antacid. Calcium is necessary by the body for bones, heart and muscles.
In this, we are not provided the direct masses, so we will use this percentage composition.
The number of moles of each element are:
Ca-40/40= 1
C- 20/12 = (1.6 considered to be 1)
O- 48/16 = 3
Now all the three will be divided with the lowest value and that is 1, so the ratio of Ca: C: O= 1:1:3
Therefore, the simplest formula is CaCO3.
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Can anyone help me in this question? (Q13 part A, B, and C)
Answer:
a. Yes, both W and Y have the same atomic number. Since the atomic mass equals the sum of protons (which is the atomic number) and neutrons, both W and Y have different numbers of neutrons, making them isotops of each other.
b. Both W and Y have the same atomic number, making both the same element. Therefore they have the same chemical properties.
c. W: 29 protons, 34 neutrons, 29 electrons
Y: 29 protons, 36 neutrons, 29 electrons
Explanation:
a. Yes, both W and Y have the same atomic number. Since the atomic mass equals the sum of protons (which is the atomic number) and neutrons, both W and Y have different numbers of neutrons, making them isotops of each other.
b. Both W and Y have the same atomic number, making both the same element. Therefore they have the same chemical properties.
c. W: 29 protons, 34 neutrons, 29 electrons
Y: 29 protons, 36 neutrons, 29 electrons
Remember: mass number = protons (atomic #) + neutrons
1-Give some examples of buffer solutions.
2-Mention some applications of buffer solutions in Pharmaceutical Sciences.
Examples of buffer solutions include:
ammonia (NH₃)sodium acetate (NaC₂H₃O₂)acetic acid (HC₂H₃O₂)Some applications of buffer solutions in Pharmaceutical Sciences include:
to establish hydrogen ion activity for calibration of the pH meter using a buffer solution.to prepare isotonic dosage form formulations.to adjust the pH of systems in analytical procedures with the buffer solution.to maintain the stability of dosage forms. What are buffer solutions?A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa.
Buffers are broadly divided into two types
1. acidic buffer solutions and
2. alkaline buffer solutions.
Acidic buffers are solutions that have a pH below 7 and contain a weak acid.
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What effect do energy levels have on effective nuclear charge?
Which of these is a safe lab practice?
A. Going to talk to your friend across the room while the Bunsen burner is on.
B. Labeling all chemicals immediately.
C. Picking up a hot beaker with your hands.
D. Pouring all the leftover chemicals and products down the drain.
Answer:
b labeling all chemical immediately
You have a container with a semi-permeable membrane in the middle separating a left and right side. On the left side of the container is a high concentration of salt solutes, what will happen to the solutes in the container?
What will happen to the solute molecules on the left side of the container would depend on the kind of solution present on the right side.
What is osmosis?What will happen to the solutes in the container can be explained using osmosis.
Osmosis refers to the movement of water molecules from the region of high water potential or low solute concentration to the region of low water potential or high solute concentration through a selectively permeable membrane.
Now, let us assume that the solution on the right side of the container has a lower solute concentration, which means that water molecules would move from the right side to the left side through the semi-permeable membrane. The solutes in the left side of the container would become diluted.
If it were to be the other way round, that is, the solution on the right side has more solutes than the one on the left side. Water molecules will move from the left side to the right side. Thus, the solution on the left side will become more concentrated as a result of water loss.
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A balloon at 30.0°C has a volume of 222 mL. If the temperature is increased to 64.1°C and the pressure remains constant, what will the new volume be, in mL?
Answer:
Explanation:
I forgot
In the cisconfiguration, the methyl groups are placed _____.
on the same side of the double bond
on opposite sides of the double bond
in between the double bonds
to the left of the double bond
What is the mass in grams of 7.64 x 10^25
molecules of l₂?
Mass of 7.64 x 10^25 molecules of l₂ is 3.04 grams
Calculation of mass here we are doing from the number of molecules given. To do so we use the Avogadro's number. Avogadro's number is one of the most fundamental constants of chemistry. It helps us to compare the different atoms or molecules of given substances where the same number of atoms or molecules are being compared.
Along with that we will also be using the number mole as well here. number of moles is nothing but the given mass divided by the molecular mass of the compound.
To solve the above given question we use the below given formulas;
number of molecules = Number of moles × Avogadro number
Number of moles = Number of molecules
Avogadro number
⇒ 7.64×[tex]10^{25}[/tex] = 0.012 moles
6.023×[tex]10^{23}[/tex]
Mass = Number of moles × Molecular mass
⇒ 0.012 × 253.80 = 3.045 grams
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