Cross-linking polymers not only increases the tensile strength of the polymer, but it also changes the polymer's elastic properties.
What are polymers ?The term polymer is defined as any of a class of natural or synthetic material composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers.
Adding cross-links between polymer chains initially makes the polymer more elastic. The introduction of short chains of sulfur atoms that link the polymer chains in natural rubber, for example, results in the vulcanization of rubber. The polymer becomes more rigid as the number of cross-links increases.
Thus, Cross-linking polymers not only increases the tensile strength of the polymer, but it also changes the polymer's elastic properties.
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What is the IUPAC name for the following compound? O 1-sec-Butyl-4-isopropyl-2-methylcyclohexane O 1-Isopropyl-3-methyl-4-sec-butylcyclohexane O 4-lsopropyl-2-methyl-1-sec-butylcyclohexane O 1-sec-Butyl-3-isopropyl-2-methylcyclohexane
the IUPAC name for the following compound:
1.trans-1-isopropyl-2-methyl-cyclohexane
2.Methylcyclohexane
3. 1alpha-Isopropyl-4beta-tert-butylcyclohexane
4. 1alpha-Isopropyl-4beta-tert-butylcyclohexane
What is IUPAC nomenclature?The foundation for IUPAC nomenclature is the longest chain of carbons joined by a single bond, whether in a continuous chain or a ring. All deviations, whether multiple bonds or atoms other than carbon and hydrogen, are identified using prefixes or suffixes based on a specific set of priorities. Names are given to chemical elements based on their origins, physical or chemical properties, or fictional characters. The IUPAC then approves the recommended name for an element (International Union of Pure and Applied Chemistry).
Here,
the IUPAC designation for the subsequent compound:
1.trans-1-isopropyl-2-methyl-cyclohexane
2.Methylcyclohexane
3. 1,1-diisopropyl-4,4-dimethylcyclohexane
4. 1-amino-1-propyl-4-tert-butylcyclohexane
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add electron dots and charges as necessary to show the reaction of potassium and bromine
Potassium releases one electron, which the element bromine accepts. Potassium becomes a cation with a positive charge during this process, while bromine will become an anion with a negative charge.
Potassium: What is it?The mineral potassium is a required element for all bodily tissues. It is commonly referred to as electrolyte since this carries just little charged particles that causes a range of neuron of neuron functions. Available both as a nutraceuticals and naturally occurring in several foods, potassium is accessible.
How is potassium used by the body?Potassium can be found in many foods naturally and as dietary supplements. Its major goal is to aid the normal maintenance of lymphatic drainage in our cells. Sodium, on the other hand, maintains proper fluid levels within cells.
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Ammonia, NH3, is a weak base with a Kb value of 1.8×10−5. What is the pH of a 0.205 M ammonia solution?
A weak base, ammonia solution will dissociate into: NH3 + H2O. Initial combination: NH4+ + OH- , The pH of a 0.205 M ammonia solutionpH = 11.3
How harmful is ammonia?Quite poisonous is ammonia. Lungs, eyes, & skin can become seriously corroded by it. Ammonia poisoning can potentially lethal. Ammonia can injure people permanently by causing blindness and lung issues, for example.
Why would someone use ammonia?Approximately 80% of a ammonia produced from industry is used as fertilizer in agriculture. In addition to these uses, ammonia is also employed in the production of polymers, explosives, textiles, insecticides, dyes, and other compounds. It also serves as a refrigerant gas.
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at a certain temperature, the solubility of n2 gas in water at 2.04 atm is 48.0 mg of n2 gas/100 g water . calculate the solubility of n2 gas in water, at the same temperature, if the partial pressure of n2 gas over the solution is increased from 2.04 atm to 6.00 atm .
According to henry's law, The solubility of n2 gas in water, at the same temperature is, 141 mg/100 g water.
What qualities make up solubility?The maximum amount of a chemical which will dissolves in a volume of solvent at a given temperature is referred to as its solubility. Varying compounds have quite different solubilities, which is a characteristic of a specific solute-solvent pair.
Henry's Law says that the solubility of a gas is directly proportional to the pressure so:
S1/P1 = S2/P2
48 mg/100g / 2.04 atm = S2/6 atm
S2 = 141 mg/100 g water
solubility of n2 gas is 141 mg/100 g water
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A decrease of pH by 3 implies A) The H* concentration triples. B) The OH- concentration decreases by a factor of 3. C) The OH- concentration decreases by a factor of 1000. D) The H* concentration decreases by a factor of 1000.
A decrease of pH by 3 implies :C) The OH- concentration decreases by a factor of 1000.
What is the relationship between pH and OH?pH is a scale used to determine the hydroxide ion (OH–) concentration in a solution. It is equal to the negative log of hydrogen ion (H+) concentration and is also equal to the negative log of hydroxide ion (OH– ) concentration. As the pH of a solution increases by one pH unit, concentration of OH- increases by ten times.
When the value of pOH is less than 7, then it is considered basic and therefore there are more OH- than H+ in the solution. At pH 7, the substance is at neutral and means that the concentration of H+ and OH- ion is same. If pH < 7, then solution is acidic.
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Calculate the mass of vanadium(v) oxide (v2o5) that contains a million (1.0 *10^6) vanadium atoms. be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.
A million (1.0 ×10^6) vanadium atoms are present in 1.510 ×10^13 g of vanadium(v) oxide (v2o5).
Vanadium atom count: 1,000 to 10^^9 atoms
Step 2: Determine the V2O5 molecules with 1.000× 10^9 V atoms.
V2O5 molecules contain 2 V atoms each.
0.5000× 10^9 molecule V2O5 = 1.000 109 atom V (1 molecule V2O5/2 atom V)
Step 3: Determine the number of moles that equate to 0.5000× 10^9 molecules of V2O5.
We shall utilize Avogadro's number: 6.022 x 10^23 molecules of V2O5 make up 1 mole of the substance.
1 mol/6.022 10^23 molecules divided by 0.5000 109 molecules equals 8.303 10^16 molecules.
Step 4: Determine the mass equal to 8.303 1016 moles of V2O5.
V2O5 has a molar mass of 181.88 g/mol.
8.303 × 10⁻¹⁶ mol
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Would you expect nonpolar molecules to "stick together" more or less effectively than polar molecules?
Non-polar molecules are less effective at "sticking" than polar molecules.
Nonpolar molecules are less effective at "sticking" than polar molecules because they lack dipoles that can form positive and negative ends held together by dipole-dipole interactions. The inter-dipole interactions between these instantaneous dipoles are known as dispersion forces. These forces, also called van der Waals forces, help neutral atoms and nonpolar molecules attract each other. Polar molecules differ from non-polar molecules in that they have positive and negative ends and strong intermolecular attractive forces. Non-polar molecules are less effective at "sticking" than polar molecules.
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Calculate the equilibrium constant for each of the reactions at 25 ∘C.
A) MnO2(s)+4H+(aq)+Cu(s)→Mn2+(aq)+2H2O(l)+Cu2+(aq)
Standard Electrode Potentials at 25 ∘C
Reduction Half-Reaction E∘(V)
Pb2+(aq)+2e− →Pb(s) -0.13
Mg2+(aq)+2e− →Mg(s) -2.37
Br2(l)+2e− →2Br−(aq) 1.09
Cl2(g)+2e− →2Cl−(aq) 1.36
MnO2(s)+4H+(aq)+2e− →Mn2+(aq)+2H2O(l) 1.21
Cu2+(aq)+2e− →Cu(s) 0.16
the equilibrium constant (Kc) for the reaction at 25 ∘C is e^(-5764.68/(8.314*298.15))
The equilibrium constant (Kc) for a reaction can be calculated using the standard Gibbs free energy of the reaction (ΔG°) at a given temperature. The Gibbs free energy for a reaction can be calculated using the standard electrode potentials (Eo) of the reduction
half-reactions involved in the reaction as: ΔG° = -nFΔE°
For the reaction : MnO2(s) + 4H+(aq) + Cu(s) → Mn2+(aq) + 2H2O(l) + Cu2+(aq)
The standard electrode potentials for the reduction half-reactions are:
MnO2(s) + 4H+(aq) + 2e- → Mn2+(aq) + 2H2O(l) Eo = 1.21 V
Cu2+(aq) + 2e- → Cu(s) Eo = 0.16 V
The change in standard electrode potential for the reaction is the sum of the electrode potentials for the half-reactions is :
ΔE° = Eo(Mn2+/MnO2) + Eo(Cu/Cu2+) = 1.21 V + 0.16 V = 1.37 VThe standard Gibbs free energy for the reaction is
ΔG° = -nFΔE° = -4 * 96485 * 1.37 = -5764.68 J/mol
The equilibrium constant (Kc) for the reaction at 25 ∘C can be calculated using Kc = e^(-ΔG°/RT) where R is the gas constant (8.314 J/mol·K) and T is the temperature in Kelvin (298.15 K).So the equilibrium constant (Kc) for the reaction at 25 ∘C is e^(-5764.68/(8.314*298.15))
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the equilibrum constant Kp for teh reaction SO2 NO2 --> SO3 NO is 3 find the pressure of NO2 that must be added to 2.4 atm of SO2 in order to form 1.2 atm of SO3 at equilibrium
The equilibrium constant Kp for the reaction :
SO₂ + NO₂ ⇄ SO₃ + NO is 3. The pressure of the NO₂ is 0.18 atm.
The reaction is
SO₂ + NO₂ ⇄ SO₃ + NO
Kp = [ SO₃ ] [NO] / [SO₂ ] [ NO₂ ]
The equilibrium constant ,Kp = 3
P [ SO₂] = 2.4 atm
P [ SO₃ ] = 1.2 atm
P [NO] = 1.1 atm
Kp = [ SO₃ ] [NO] / [SO₂ ] [ NO₂ ]
3 = 1.2 × 1.1 / 2.4 [ NO₂ ]
3 = 1.32 / 2.4 [ NO₂ ]
[ NO₂ ] = 1.32 / 7.2
[ NO₂ ] = 0.18 atm
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a compound containing 5.9265% hydrogen and 94.0735% oxygen has a molar mas of 34.01468g/mol. determine the emperical and molecular formula of this compound
A substance with a molar mass of 34.01468g/mol and an empirical formula of Hydrogen and oxygen and a molecular formula of twice has a composition of 5.9265% hydrogen and 94.0735% oxygen.
Thus Molecules are described by the empirical formula, where n = 1, 2, and 3. You can use the empirical formula to ascertain the molecular formula if you are aware of the molar mass of the chemical. Calculate the empirical formula mass first, and then divide the compound molar mass by it to get the empirical formula mass. Compounds are chemical entities comprised of a large number of comparable molecules.
Empirical equation equals Molecular formula
Hydrogen = 5.9265/atm weight: 5.9265/5.8795 = 1 (approximately)
Oxygen = 94.0735/16: 5.8795/5.8795 = 1
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This diagram of the first right-hand rule relates which two quantities?
A. current (thumb) to magnetic field (fingers)
B. magnetic field (thumb) to current (fingers)
C. current (thumb) to force (fingers)
D. force (thumb) to current (fingers)
The first right-hand rule relates two quantities that are current (thumb) to magnetic field (fingers).
What is first right-hand rule?The right hand rule states that you should point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the resulting magnetic force to find the direction of the magnetic force on a positive moving charge.
Rule of the Right Thumb:The direction of the wrapped fingers will indicate the direction of magnetic field lines if a current-carrying conductor is thought to be held in your right hand with the thumb pointing in the direction of the current.
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the reaction, at 50% yield, produces 4.0 moles of n2. what was the mass of hydrazine used? assume that o2 is in excess.
N2(g) + 2 H2O N2(g) + O 2(g) (g) At a 50% yield, the process generates 4.0 moles of N2. Therefore, 4.0 * 100 / 50 = 8.0 moles of hydrazine are used to produce the theoretical yield of N2.
Are rockets still powered by hydrazine?
Hydrazine is still used in some military vehicles nowadays, but it's mainly used for extraterrestrial exploration. Hydrazine was used to help the Curiosity Rover touch down on Mars in 2012. Since then, it has been living there.
Why is hydrazine such a poison?
Since the liquid is caustic, both humans and animals who come into touch with it may develop dermatitis. Animals who were chronically (over a lengthy period of time) exposed to hydrazine through inhalation have shown effects on their thyroid, liver, spleen, and lungs.
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then write the lewis structure for Ne. draw the particle by placing atoms on the grid and connecting them with bonds. include all lone pairs of electrons and nonbonding electrons
Neon: Ne, Z=10=10e-=152 2S2 2p The Structural formula for Ne looks like this. Lewis structures use the chemical symbol for each atom to show where it is located within the molecule's structure.
How are Lewis structures drawn, and what are they?
The distribution of valence electrons around the atoms of a molecule is depicted in a Lewis diagram. While lone electron pairs are depicted as dots beside each other atoms, shared electron pairs are shown as lines between them.
Describe Lewis's structure with an example.
The octet rule, which states that atoms share electron so that each has eight in its outer shell, is the foundation of a Metal lattice. For instance, the outer shell of an oxygens has six electrons.
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Give three importance of arthropods, mollusks, and echinoderms.
1.) Arthropods: Arthropods are important as
They play a key role in many ecosystems as pollinators, decomposers, and as a food source for other animals. They also have a wide range of diversity, with over 1 million known species, which makes them an important group for the study of evolution and ecology.2.) Mollusks: Mollusks are important for several reasons.
They play a key role in marine ecosystems as filter feeders and as a food source for other animals. They also have a wide range of diversity, with over 85,000 known species, which makes them an important group for the study of evolution and ecology. Additionally, they have been used by humans for food, medicine, and jewelry for thousands of years.3.) Echinoderms: Echinoderms are important for several reasons.
They play a key role in marine ecosystems as predators, scavengers, and as a food source for other animals. They also have a wide range of diversity, with over 7,000 known species, which makes them an important group for the study of evolution and ecology. They also have an unique regeneration abilities which makes them important for the study of regenerative medicine.Hope This Helps You!
Question 1 (1 point) The form of amino acid is a dipolar ion that carries both positive and negative charge. cationic anionic zwitterionic none of these
The zwitterionic form of an amino acid is just a dipolar ion that possesses both negative and positive charges.
Describe Zwitterion.a molecule with both both negative and positive charges filed on some of its atoms, but a net procedural charge of zero. One or more intended to commit are required to bind the charged atoms together. NaCl & NH4Cl are not zwitterions because the charged protons are not physically bound to one another.
Is zwitterionic a good or bad thing?Zwitterions have a neutral overall charge and contain both positive and negative charged groups. The usage of such compounds as friendly coverings for materials was motivated by the zwitterionic properties of cell membranes. A basic methyl group or an corrosive carboxylate group are both present in amino acids.
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Two atoms have the following nuclear composition.
What is the relation between the two species?
Isobars
Isodiaphers
Isotopes
Isotones
The relation between the two chemical species is isotopes, as they have the same atomic number (17) but different number of neutrons (18 and 20 respectively), based on the available question.
The relation between the two species is isotopes if they have the same number of protons but a different number of neutrons.
If they have the same number of neutrons but different number of protons then it is Isotones.
If they have the same number of protons and neutrons but different atomic number then it is Isodiaphers.
If they have the same atomic mass but different atomic number then it is Isobars.
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The correct question can be:
Two atoms A and B have the following nuclear composition: Atom A consists of 17 protons, 18 neutrons, and 17 electrons, and atom B consists of 17 protons, 20 neutrons, and 17 electrons
What is the relation between the two chemical species?
a. Isobars
b. Isodiaphers
c. Isotopes
d. Isotones
___ takes place when a hot body of magma intrudes into the cold, upper part of the crust.
Answer: contact metamorphism
Explanation:
Contact metamorphism happens when a body of magma intrudes into the upper part of the crust. Heat is important in contact metamorphism, but pressure is not a key factor, so contact metamorphism produces non-foliated metamorphic rocks such as hornfels, marble, and quartzite.
The light and dark circles in the picture represent different types of atoms. Which picture best represents a pure compound?
The third image is a pure compound since it only contains one kind of atom combination. (C)
A pure compound is one that has two or more elements chemically combined in a specific ratio. Chemical techniques can split these compounds into independent or straightforward constituents. A pure compound is created when elements are linked together by chemical bonds. substances that are as pure as water, crystals, and baking soda.
Oxygen and hydrogen combined in a fixed ratio to form the compound water. A pure substance has a single type of constant-composition atom or molecule. The first image depicts a pure material, while the second and fourth images show mixed compounds. Consequently, the third image depicts a pure compound.
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an unknown element is determined to have two naturally occurring isotopes. isotope 1 is 64.11% abundant and has a mass of 68.925580 u, and isotope 2 has a mass of 70.9247005 u. determine the atomic mass of the unknown element. express your answer to four significant figures.
an unknown element is determined to have two naturally occurring isotopes. isotope 1 is 64.11% abundant and has a mass of 68.925580 u, and isotope 2 has a mass of 70.9247005 u, the atomic mass of the unknown element is 69.64 u.
What is percentage abundant?The proportion of a given element's all-natural isotopes is known as its percent abundance. An element's relative abundance is its frequency in the environment as compared to all other elements, expressed as a percentage. The quantity of isotopes and their relative abundances are all that are required to determine an element's atomic weight, as was previously said.
Given that,
isotope 1 is 64.11% abundant (X₁)
isotope 2 percentage abundant is (X₂) = (100 - 64.11) = 35.89
Mass of isotope (M₁) = 68.925580 u
Mass of another isotope (M₂) = 70.9247005 u
atomic mass of the unknown element = (M₁ X₁ + M₂ X₂) / 100%
M = (68.925580 × 64.11) + (70.9247005 × 35.89) / 100%
M = 69.64
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What is found outside the nucleus of the atom and is the location of all electrons in the atom?
Answer:
Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. Because opposite electric charges attract each other, negative electrons are attracted to the positive nucleus.
what is pkb of the conjugate base of x-281? (assume 25 ∘c.)
The pkb of the conjugate base of x⁻281 is 9.69.
Conjugate base is termed as the base member x⁻ of a pair of compounds which transform into each other by gaining or losing a proton. The conjugate base is able to gain or absorb a proton in the chemical reaction. It is formed when a proton is removed from an acid. It depends upon which substance is involved. conjugate base is the solvated electron whose conjugate acid is the atomic hydrogen.
Its calculation is based on the relation between pKa and pKb with pKw
pKa + pKb = pKw = pKa + pKb = 14.00
pKb = 14.00 - pKa = 14.00 - 4.31 = 9.69
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Consider the following tetra-substituted cyclohexane: a. Draw both chair conformations of this compound. b. Determine which conformation is more stable. c. At equilibrium, would you expect the compound to spend more than 95% of its time in the more stable chair conformation? Show any necessary calculations.
The conformation with the axial methyl and chlorine substituents is more stable.
What is chlorine substituents?Chlorine substituents are chemical groups or molecules that are attached to other molecules or substances, typically through a covalent bond.
Since the axial methyl and chlorine substituents are more stable, the compound would spend more than 95% of its time in this conformation. To calculate this, we can use the Boltzmann equation.
ΔG = -RTlnK
Where K is the equilibrium constant.
K = e-ΔG/RT
For a temperature of 25°C, R=8.314 J/K⋅mol.
ΔG = -8.314⋅25⋅lnK
If we assume that K is greater than 95%, then lnK must be a positive number.
lnK = ΔG/8.314⋅25
ΔG = 8.314⋅25⋅ln95
ΔG = 44.2 kJ/mol
Therefore, the compound will spend more than 95% of its time in the more stable conformation if the energy difference between the two conformations is greater than 44.2 kJ/mol.
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kalsi3o8 what is the total contribution of the three si atoms to the sum of oxidation numbers in k-feldspars
The total contribution of the three Si atoms to the sum of oxidation numbers in K-feldspars is 0.
What is oxidation numbers?The oxidation state, also known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its bonds to other atoms were fully ionic. It describes how much an atom has oxidised (lost electrons) in a chemical compound.
This is because Si atoms have an oxidation number of 0 due to their electron configuration. Each atom has the same number of protons (4) as electrons (4), resulting in a neutral charge and an oxidation number of 0.
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through stoichiometric calculations, the theoretical yield of iron(iii) oxide was calculated to be 12.3 g. however, when massed after the reaction, only 10.7 g of iron(iii) oxide had been produced. what is the percent yield of iron(iii) oxide?
The amount that would be produced by the reaction if it were complete is known as the theoretical yield. yield in percentage: 0.15 / 0.16 x 100 = 93.75%
In eleventh-grade chemistry, what is a reaction?Chemical Response: Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
What category does the reaction fall under?Combination, decomposition, single-replacement, double-replacement, and combustion are the five fundamental types of chemical reactions. You can classify a reaction into one of these groups by looking at the reactants and products. Several categories will apply to some reactions.
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Silver nitrate has a lattice energy of -820. kJ/mol and a heat of solution of +22.6 kJ/mol Delta hydration = ___________ kJ/mol
Silver nitrate has a heat of hydration of -797.4 kJ/mol.
What is heat of hydration?The heat produced when water reacts with cement powder in contact is known as the heat of hydration. The cement composition, curing temperature, water to cement ratio, and cement fineness all affect how much heat is released. The amount of energy generated during the hydration process of one mole of ions is known as the heat of hydration. It is a particular kind of dissolution energy, and water is the solvent. The heat of hydration is a crucial component of mass concrete (ACI 207.1R). In order to reduce cracking, measures must be taken to deal with the heat generated during the hydration of the cement and the resulting volume change. Mass concrete is any volume of concrete with dimensions large enough to necessitate such measures.
Here,
In the case of silver nitrate, the heat of hydration is -797.4 kJ/mol.
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1. which one of the following is not a step used for balancing chemical equations? a. always change subscripts to balance an equation b. write the chemical equation using formulas and symbols c. count the atoms in each substance in the reactants and products d. choose coefficients that will balance the equation
The statement that is not a step used for the balancing chemical equations is : a. always change subscripts to balance an equation.
The steps used for the balancing chemical equation is given as :
write the chemical equation using formulas and symbols . count the atoms in each substance in the reactants and products.choose coefficients that will balance the equation.The equation is said to be balanced when the number of the atom in the product side is equals to the number of the atoms in the products side.
Thus, the incorrect statement is always change subscripts to balance an equation.
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what is the proper procedure for performing a one-color maintenance service on nail enhancements using monomer liquid and polymer powder?
Eliminate the polish. The present product's ledge should be rounded off. Rework and improve enhancement. Buff. Smooth. Clean. Apply primer and nail dehydrator. Put on some liquid and powder.
The right way to apply one-color monomer liquid and polymer powder nail enhancements to natural nails and their tips, Reverse the eponychium. buffed a nail Utilize a nail dehydrator. Put nail primer on. In serrated dapper dishes, add monomer and polymer powder. Brush into monomer liquid and blot excess with paper towel. Brush into powder and coat. Put a pink product in the nail's middle. Form the improvement. Put the second bead on top of the previous one. Free edge may be shaped with mild abrasive. Buffed a nail hand cream and polish from applu.
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how many valence electrons total would be contained in a sample of 4.78 million kg of sulfur
The total number of valence electrons contained in a sample of 4.78 million kg of sulfur would be 5.3078 x [tex]10^{32[/tex] valence electrons.
Number of atoms in a mass of a sampleAccording to Avogadro, 1 mole of any substance contains 6.022 x [tex]10^{23[/tex] atoms.
4.78 million kg of sulfur = 4,700,800 kg = 4,700,800,000 grams
Mole = mass/molar mass
Mole of 4,700,800,000 grams sample of sulfur = 4,700,800,000/32
= 146900000 moles
146900000 moles = 146900000 x 6.022 x [tex]10^{23[/tex] atoms
= 8.8463 x [tex]10^{31[/tex] atoms
Now each atom of sulfur contains 6 valence electrons. Thus, total number of valence electrons would be:
6 x 8.8463 x [tex]10^{31[/tex] = 5.3078 x [tex]10^{32[/tex] valence electrons
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if 3.25 g of n2h4 reacts with excess oxygen and produces 0.750 l of n2, at 295 k and 1.00 atm, what is the percent yield of the reaction?
At 295 K and 1.00 atm, a reaction involving 2.65 g of N2H4 and extra oxygen yields 0.75 of N2 and a percent yield of 29.76%.
Take into account the following balanced equation.
N2H4(aq) N2(g) O2(g) = N2(g) 2H2O (l)
Using the following conversion factors and 2.65 g of N2H4, we can get the theoretical volume of N2 obtained at STP.
N2H4 has a 32.05 g/mol molar mass.
N2H4 and N2 have a 1:1 molar ratio.
N2 takes up 22.4 L per mole at STP.
3.25g N2H4× (1mol N2H4/32.05)× (1mol N2H4/ 1mol N2H4)×(22.4 L N2/1mol N2
We have 2.33 L of N2 at 273.15 K, and by applying Charles' law, we can determine the volume at 295 K.
V1/T1=V2/T2
V2=V1×T2/T1
V2=V1×T2/T2
=2.33295/273.15
V2=2.52L
The following phrase can be used to get the percent yield.
%yield is experimental yield minus theoretical yield, therefore 100 = 0.75 minus 2.52 equals 29.76%.
The percent yield of the reaction is 29.76% when 3.25 g of N2H4 reacts with extra oxygen to create 0.75 l of N2 at 295 K and 1 atm.
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What factor does not play an important a significant role in the extent of harm upon exposure to a chemical? (a) Dose (b) Length of exposure (c) State (d) Path of exposure
State not play an important a significant role in the extent of harm upon exposure to a chemical.
What is meant by chemical?
Any material with a known composition is a chemical. To put it another way, a chemical always consists of the same "substance."There are some substances in nature, like water. Chlorine and other chemicals are made at factories.Examples of flammable liquids include benzene, dimethylformamide, acetonitrile, hexane, and pyridine. Other examples include methanol, ethanol, acetone, xylene, toluene, ethyl acetate, and tetrahydrofuran.All of these things are made of chemicals, some natural and others synthetic, including air, water, iron, fuel, clothing, stones, furniture, plastics, plants, and food.Chemicals can be made up of several different chemicals or they can be single chemical molecules like water. Nitrogen, oxygen, water, carbon dioxide, and other substances are all present in air.To learn more about chemical refer to
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