The mass percentage of the nitrogen is 35 %. The mass percentage oxygen is 60%. The mass percentage hydrogen is 5%.
The mass percentage expression is given as :
The mass percentage = ( mass of element / mass of the compound)/ ×100%
The given compound is NH₄NO₃ :
The molar mass of NH₄NO₃, = 28 + 4 + 48
= 80 g/mol
Mass percentage of nitrogen = (weight of N/weight of NH₄NO₃ )×100%
= 28 / 80 × 100 %
= 35 %
Mass percentage oxygen = 48 / 80 × 100 %
= 60%
Mass percentage hydrogen = 4 / 80 × 100 %
= 5%
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Identify the nucleophilic and electrophilic sites in the reactants of the following reaction. LI-Me
In the reaction LI-Me, the nucleophilic site is the lithium atom (Li) and the electrophilic site is the carbon atom in the methyl group (Me).
In general, lithium (Li) is a highly electropositive metal and acts as a strong nucleophile, meaning it has an excess of electrons and tends to donate them to an electrophile, which is a molecule or atom that has a deficit of electrons and tends to accept them. On the other hand, carbon atom in the methyl group (Me) is considered as a electrophile because it has a partial positive charge due to the presence of hydrogen atoms in its surrounding which causes it to accept electrons. The nucleophilic lithium atom attacks the electrophilic carbon atom in the methyl group, leading to the formation of a new chemical bond and the formation of a new compound.
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true/false. the solvent is usually referred to as the component of a solution which is present as: (select all that apply.) one liter the larger quantity the smaller quantity the liquid which dissolves a solid
The solvent is usually referred to as the component of a solution the smaller quantity.
What is a solvent in chemistry?A solute can be dissolved by a solvent, which creates a solution. In addition to being a liquid, a supercritical fluid, a solid, or a gas can also be a solvent.Many reactions are made easier by solvents, which are substances that dissolve solutes and create solutions. They are utilised for a variety of tasks, including dry cleaning, painting, and extractions. They can be as hazardous as dichloromethane or as harmless as water.The solute is the thing that needs to dissolve, and the solvent is the thing that needs to dissolve it. With a wide variety of solutes and solvents, solutions can be created. We are aware of a wide range of solutions.Learn more about Solvent refer to ;
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Element X is a solid metal that reacts with chlorine to produce a water-soluble binary compound. The metal combines with chlorine to form a compound with the formula MCl2 MCl2 . What Group of the Periodic Table is Ma member of?
Element X is a member of Group 17 of the Periodic Table, also known as the Halogen family.
What is chemical elements?Chemical elements are the building blocks of all matter in the universe. They are the simplest form of matter, consisting of single atoms or molecules, and are composed of the same type of atom. There are 118 known elements that make up the periodic table, which are either naturally occurring or artificially created. Each element has unique properties that can be used to describe its characteristics.
All Group 17 elements, including X, are non-metals that are highly reactive and form compounds with most other elements. Element X is likely to be either fluorine, chlorine, bromine, or iodine. When element X reacts with chlorine, it forms a binary compound with the formula MCl2. This compound is water-soluble, meaning it can be dissolved in water.
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Which of the following descriptors best describes the stereoconfiguration of the molecule below? Z E cis trans
The following descriptors best describes the stereo configuration of the molecule below is the E configuration.
The cis / trans configuration are determine for the molecules which have the two similar substituents. But in this case all the four substituents attached to the double bonded carbon is deferent.
The E / Z configuration is determine by the whether the higher priority group on the each carbon is on the same side or the opposite side of the double bond. Since the high priority groups are on the opposite side, then the alkene has an E configuration.
Thus, the given molecule has the E configuration.
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Which of the following statements correctly describe reaction intermediates? Select all that apply.
Multiple select question.
A) Reaction intermediates are short-lived molecules that form as a result of a chemical reaction.C) Reaction intermediates are molecules that are produced as a result of a chemical reaction.
What is the molecules ?
Molecules are the smallest unit of a substance that can exist independently and has the same chemical properties as the original substance. They are made up of atoms that are connected together by chemical bonds. Molecules are the basic building blocks of all matter, and they exist in a variety of shapes and forms, including solids, liquids, and gases. Molecules can also be composed of multiple elements, such as water which is composed of two hydrogen atoms and one oxygen atom. Molecules can be found in a wide range of materials, from the air we breathe to the food we eat.
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Complete question
A) Reaction intermediates are short-lived molecules that form as a result of a chemical reaction.
B) Reaction intermediates are stable molecules that form as a result of a chemical reaction.
C) Reaction intermediates are molecules that are produced as a result of a chemical reaction.
D) Reaction intermediates are molecules that remain unchanged throughout a chemical reaction.
Later in the course, we will compare the halogenation of differently substituted carbons, comparing reactions like the ones below. Which of the following statements is true about reactions I and II? O Neither reaction has a positive heat of reaction (AH) O Only reaction II has a positive heat of reaction (AH) O Only reaction I has a positive heat of reaction (AHº) O Both reactions have a positive heat of reaction (Hº)
The assertions regarding reactions I and II in the reactions connected below are correct; neither reaction has a positive heat of reaction .
A material can be halogenated chemically by adding one or more halogens to it. Because halide-containing substances are so prevalent, this kind of transformation is essential for creating polymers and medicines, among other things. In fact, this kind of conversion happens so frequently that it is hard to give a complete description. This article's main focus is on how elemental halogens are used in halogenation (F2, Cl2, Br2, I2). Halogen acids and halide salts are frequently used to introduce halides. For the purpose of adding halogens to a range of substrates, including thionyl chloride, there are a number of specialized reagents available.
complete question:Later in the course, we will compare the halogenation of differently substituted carbons, comparing reactions like the ones below.
Which of the following statements is true about reactions I and II?
A: Only reaction II has a positive heat of reaction
B: Neither reaction has a positive heat of reaction
C: Both reactions have a positive heat of reaction
D: Only reaction I has a positive heat of reaction
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In each pair below identify which you would expect to have the highest boiling point. Please justify your answers. a. 1-hexanol or 3,3-dimethyi-1-butanol b. 2-hexanol or 1,5-hexanediol
In each pair below identify which you would expect to have the highest boiling point. The correct Option is b 2-hexanol or 1,5-hexanediol
b. 1,5-hexanediol would have the higher boiling point. This is because 1,5-hexanediol has a higher molecular weight than 2-hexanol and it has two hydroxyl groups (OH) in its structure which creates more intermolecular forces of attraction than a single alcohol group in 2-hexanol. Additionally, diols have stronger intermolecular forces than alcohols due to the formation of hydrogen bonds between the hydroxyl groups.The boiling point is the temperature at which a liquid changes its state to a gas at a particular pressure. It is the temperature at which the vapor pressure of a liquid is equal to the pressure of the surrounding atmosphere. At the boiling point, the liquid is at a state of thermodynamic equilibrium with its vapor, and any further increase in temperature will cause bubbles of vapor to form within the liquid.
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A glass vessel contains 32 g of oxygen gas. Assuming ideal behavior; which of the processes listed below would double the pressure exerted on the walls of the vessel? (Select all that apply:) A) Adding 28 g of oxygen gas. B) Raising the temperature of the container from -73 %C to 127 %C C) Adding 32 g of oxygen gas. D) Raising the temperature of the container from 30. %C to 60. "C. D) Adding enough mercury to fill one-half the container
Adding 28g and 32g of oxygen will double the amount of pressure exerted on the walls.
What is pressure?
Pressure is the force exerted per unit area on an object. In the context of gases, pressure is the force exerted by the collisions of gas molecules on the walls of a container. The pressure exerted by a gas on the walls of a container is directly proportional to the number of moles of gas present in the container and the temperature of the gas.
Option A: Adding 28 g of oxygen gas would increase the number of moles of gas present in the container by 28/32 g/mol = 0.875 moles, which will double the pressure exerted on the walls of the vessel.
Option B: Raising the temperature of the container from -73 %C to 127 %C will increase the kinetic energy of the gas molecules, causing them to collide more frequently and with greater force against the walls of the container. This will increase the pressure exerted on the walls of the container but it will not double the pressure.
Option C: Adding 32 g of oxygen gas would increase the number of moles of gas present in the container by 32/32 g/mol = 1 moles, which will double the pressure exerted on the walls of the vessel.
Option D: Raising the temperature of the container from 30. %C to 60. "C will increase the kinetic energy of the gas molecules, causing them to collide more frequently and with greater force against the walls of the container. This will increase the pressure exerted on the walls of the container but it will not double the pressure.
Option E: Adding enough mercury to fill one-half the container will not affect the pressure exerted by the oxygen gas on the walls of the container as mercury and oxygen are not interacting and don't affect each other pressure.
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Consider the following reaction:
N2H4(g)+H2(g)→2NH3(g)
If the rate of decrease for the partial pressure of N2H4 in a closed reaction vessel is 78 torr/h, what is the rate of change for the partial pressure of NH3 in the same vessel? What is the rate of change of total pressure in the vessel during the reaction?
In the same vessel, the partial pressure of NH3 would change at a rate of change of 156 torr/h, which is twice as fast as the partial pressure of N2H4 did.
What is the rate of change for the partial pressure of NH3?Generally, The rate of change for the partial pressure of NH3 in the same vessel would be double the rate of decrease for the partial pressure of N2H4, or 156 torr/h.
The rate of change of total pressure in the vessel during the reaction can be calculated by adding the rate of decrease of N2H4 to the rate of increase of NH3.
Since the rate of decrease for N2H4 is 78 torr/h and the rate of increase for NH3 is 156 torr/h, the rate of change of total pressure in the vessel during the reaction would be
78 + 156 = 234 torr/h.
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Bromine monochloride is synthesized using the reaction Br2(g)+Cl2(g)↽−−⇀2BrCl(g)p=1.1×10−4 at 150 K A 201.0 L flask initially contains 0.902 kg of Br2 and 1.066 kg of Cl2. Calculate the mass of BrCl , in grams, that is present in the reaction mixture at equilibrium. Assume ideal gas behavior.
The mass of BrCl that is present in the reaction mixture at equilibrium is 0.519 grams
What is a mass of BrCl?Generally, To calculate the mass of BrCl present at equilibrium, we need to use the equilibrium constant expression (Kp) for the reaction:
Kp = [BrCl]^2 / [Br2] [Cl2]
where [BrCl], [Br2], and [Cl2] are the concentrations of the respective gases at equilibrium.
Since we know the initial amounts of Br2 and Cl2, and the volume of the flask, we can calculate the initial concentrations of each gas.
[Br2]_initial = 0.902 kg / (201.0 L * 0.08206 Latm/molK * 150 K)
= 0.0014 mol/L [Cl2]_initial
= 1.066 kg / (201.0 L * 0.08206 Latm/molK * 150 K)
= 0.0017 mol/L
We are also given the value of Kp, so we can substitute the initial concentrations into the Kp expression and solve for [BrCl].
Kp = [BrCl]^2 / 0.0014 mol/L * 0.0017 mol/L
= (1.1×10^-4)
[BrCl] = √(Kp * [Br2]_initial * [Cl2]_initial)
=√(1.1×10^-4 * 0.0014 mol/L * 0.0017 mol/L)
= 1.61802349*10^{-5} mol/L
To convert molarity to mass, we need to multiply the molarity by the molar mass of BrCl.
The molar mass of BrCl is
(2 * 79.904 g/mol) = 159.808 g/mol.
mass of BrCl = [BrCl] * V * M
=1.61802349*10^{-5}mol/L * 201.0 L * 159.808 g/mol
= 0.519 grams
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A student is demonstrated a transformation of kinetic and potential energy in a system using the pendulum shown below at which point is the system does the pendulum bob demonstrate minimum potential energy 
The potential energy of the pendulum can be modeled off of the basic equation PE = mgh.
How do you find the potential and kinetic energy of a pendulum?where h is the height and g is the acceleration brought on by gravity. This equation is frequently used to simulate items falling freely.The pendulum is not falling freely; instead, it is restrained by the rod or string.
As a result, we must express the height in terms of the angle and the pendulum's length L. Therefore, h = L(1 - COS) The formula for kinetic energy is KE= 12mv2, where m is the pendulum's mass and v is its speed. The pendulum is temporarily immobile when it is at its highest point (Point A).
There is no kinetic energy in the pendulum; all of its energy is gravitational potential energy. If friction and other non-conservative factors are ignored, we see that in a straightforward.
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emergent behavior at the calcitewater interface during reactive transport in a simple microfluidic channel. true or false
False. Emergent behavior at the calcitewater interface is not typically observed during reactive transport in a simple microfluidic channel.
What is calcitewater interface?
Calcitewater interface is a type of interface between two different types of surfaces that are made of calcium carbonate, such as limestone and marble. The interface between these two materials provides an interface which is extremely resistant to erosion and is also highly effective at preventing water from passing through it. Calcitewater interfaces are commonly used in water treatment plants to protect the plant's equipment from erosion caused by the naturally acidic water. The interface works by reducing the alkalinity of the water, which helps to reduce corrosion and sedimentation, as well as reducing the amount of dissolved solids that are present in the water.
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Based on the Tonicity in Elodea Cells lab, a hypotonic environment causes a cell to swell or burst because
-the water in the solution moves into the plant cell.
-the solutes in the solution have a lower concentration than the solute concentration inside the plant cell.
-the water is moving down its concentration gradient from high to low.
-The water moved across the selectively permeable membrane down its concentration gradient from an area of high water concentration to an area of low water concentration. There were fewer solutes in the solution and more solutes in the cell, which is why the water moved into the cell.
A hypotonic environment causes a cell to swell or burst because the water is moving down its concentration gradient from high to low.
What is hypotonic environment?
A hypotonic environment is an environment where the concentration of solutes outside a cell is lower than the concentration of solutes inside the cell. This can cause water to move into the cell by osmosis, causing the cell to swell and possibly even burst. Hypotonic environments are most commonly found in aquatic environments, but can also be seen in a variety of other settings, such as in a cell culture dish or in a protein crystallization experiment. In the case of aquatic environments, hypotonic solutions are those that have a lower salt concentration than the solution inside the cell, causing the cell to absorb more water than it would in a hypertonic solution.
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which of the following would be considered good practice for cleaning up large pieces of contaminated glass in a laboratory biohazard spill?
We would be considered the good practice for the cleaning up large pieces of the contaminated glass in laboratory biohazard spill is to wear the gloves.
The good practice for the cleaning of the large pieces of the contaminated glass in lab biohazard spill are :
1) To Wear gloves
2) To wear the Lab coat
3)To wear the Face protection
4) To Use a dust pan
5) Use the Tongs
These are practices that should be taken in a laboratory for cleaning of the large pieces of the contaminated glass in lab biohazard spill. These protection should be taken in the lab.
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classify each element correctly according to its general position on the periodic table. s s drop zone empty. cu cu drop zone empty. ca ca drop zone empty. si si drop zone empty. main-group metal metalloid nonmetal transition metal
According to the position of the molecule in periodic table, S is nonmetal: Cu and Ca are metal: and Si is a metalloid.
Calcium (Ca) is a metal since it is an element that forms positive ions and has metallic bonding.
Copper (Cu), a mineral and element, is a significant industrial metal due to its excellent ductility, malleability, thermal and electrical conductivity, and corrosion resistance.
Sulfur (S) is a member of the third period and family, which is the oxygen family (chalcogens family). Because the electrons are not free to flow, it is a bad conductor of heat and electricity. Sulfur lacks luster and forms sulfur dioxide, an acidic substance, when it interacts with oxygen, making it non-metallic.
Silicon (Si) is categorized as a metalloid because some of its properties are comparable to those of metals and others to those of nonmetals. For instance, silicon has a bluish-gray metallic luster and is considered to be a poor conductor of electricity.
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The actual question is:
Sort each element into groups based on where it is located on the periodic table.
Element:
Ca, S, Si and Cu
properties:
Metal, Nonmetal and Metalloid
which of the following statements about process (functional) layouts is/are correct? multiple select question. equipment is arranged in sequence order of processing so the product can flow smoothly down the line. process layouts are common in service environments. process layouts often use higher skilled labor than product layouts do. equipment is selected for high-volume output. equipment is arranged by type rather than by processing sequence.
The process(functional) layouts is where the work stationary and the machinery are not arranged according to the production sequence.
The process (functional) layouts are :
1) Process layouts are the common in Service environments.
2) Equipment is arranged by the type rather than processing sequence.
3) Process layouts often use the higher skilled labor than Product layouts do.
The process layout is also called as functional layout. The process ( functional) layouts handle a variety of goods or services. In the process layouts the similar items are grouped together. In the process layout, the jobs are grouped by the function, not by the product.
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C3H8 + 5O2 → 3CO2 + 4H2O
How many moles of H2O will be created if you burn 1.5 moles of C3H8?
a
6.0
b
0.375
c
0.75
d
2.5
According to the stoichiometry of the given chemical reaction, 2.5 moles of water will be created if you burn 1.5 moles of propane.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given reaction, 44 g of propane gives 72 g water, thus 1.5 moles will give 1.5×72/44=2.45≅2.5
Thus, 2.5 moles of water will be created if you burn 1.5 moles of propane.
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In an Experiment a fuel raised the temperature of 500g of water by 4 degree C.
a) work out the energy released in the experiment.( It takes 4.2J of energy to raise the temperature of 1g of water by 1 degree C)
Answer:
The energy released in the experiment is (500g)(4 degrees C)(4.2 J/g-degree C) = 8,400 J.
Explanation:
three equations representing a chemical reaction are shown. classify each equation according to type. molecular equation molecular equation drop zone empty. total ionic equation total ionic equation drop zone empty. net ionic equation net ionic equation drop zone empty.
The three equation representing a chemical reaction are shown as :
a) Total ionic equation
b) Net ionic equation
c) Molecular equation
The three equation represented as below :
a) Pb²⁺ (aq) + 2NO₃⁻(aq) + 2Na⁺ (aq) + 2Cl⁻ (aq) ---->
PbCl₂ (s) + 2Na⁺ (aq) + 2NO₃⁻ (aq) = total ionic equation, The complete ionic equation shows all of the dissociated ions in a chemical reaction.
b) Pb²⁺ (aq) + 2Cl⁻ (aq) ---> PbCl₂ (s) = net ionic equation, The net ionic equation is the chemical equation that shows only the elements, compounds, and ions that are involved in the chemical reaction.
c) Pb(NO₃)₂ (aq) + 2NaCl (aq) ---> PbCl₂ (s) + 2NaNO₃ (aq) = molecular equation, A molecular equation is a balanced chemical equation. The ionic compounds are indicated as molecules instead of the component ions.
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for an element in an ionic compound, the number of electrons transferred from the atom to form the ion is the
For an element in an ionic compound, the number of electrons transferred from the atom to form the ion is called ionic bonding.
An ionic compound is defined as a compound that is formed by ionic bonding. Ionic bonding occurs through the process of electron transfer where one atom gives electrons to another. These compounds are neutral compounds made up of positively charged ions and negatively charged ion. The positively charged ion is called cations and the negatively charged ions called anions. This is a chemical compound composed of ions held together by electrostatic forces. Ionic bond are called electrovalent bond. Electrovalent bond is a type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
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The ratio of a weak acid and its conjugate base at the point of maximum buffering capacity is a. 1/1 b. 1/10 c. 10/1 d. no definite ratio is needed
Option (a) is correct. The ratio of a weak acid and its conjugate base at the point of maximum buffering capacity is 1 : 1.
Weak acids are the acids which do not completely dissociate into their constituent ions when dissolved in solutions. It partially dissociates into its ions in an aqueous solution or water. Weak acids does not produce many hydrogen ions when it is in an aqueous solution. Conjugate base is said to be the particle that is left over after the acid loses its hydrogen ion. Conjugate bases are negatively charged and have high pH values. Conjugate base is produced when an acid loses a hydrogen ion.
According to Henderson-Hasselbalch Equation for the reaction is,
pH = PKa + log [base] / [acid]
At the point of maximum buffering capacity the concentrations of acid and base are equal. so, the logarithm of the concentrations of the acid and base is equal to 0. so the ration become 1:1.
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which of the following is not a difference in the pathways by which fatty acids are degraded and synthesized?
The pathways for fatty acid degradation and synthesis are similar but not identical. The key differences between the two pathways are:
Degradation occurs in the mitochondria and involves the breakdown of fatty acids into smaller molecules through beta-oxidation.Synthesis occurs in the cytoplasm and involves the building up of fatty acids from smaller molecules through the process of fatty acid synthesis.The enzymes used in the degradation and synthesis pathways are different.The overall energy balance is different between the two pathways; degradation releases energy while synthesis consumes energy.So the statement "The pathways for fatty acid degradation and synthesis are identical." is not a difference in the pathways.
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When a set of electrodes connected to a light bulb is placed in a solution of dextrose and a current is applied, the light bulb does not light up. When the same unit is placed inHCl, it does. Why?
Answer:
Dextrose being an organic compound consists of only molecules with covalent bonds, having no free ions to conduct electricity so the bulb doesn't glows. On the other hand, HCl being a polar covalent compound, in its aqueous solution dissociates into ions and the free ions are responsible for conduction of electricity so the bulb glows.
Each group wants to have ______ in order to be ____
which means ______The goal is to be just like ________________
who already have ____________________
Each group wants to have "power" in order to be "influential" which means "able to shape and control events and decisions". The goal is to be just like "powerful and influential groups" who already have "a significant level of control and influence".
What is the statement about?The statement is saying that different groups or organizations want to have a certain level of power and influence in order to be able to shape and control events and decisions.
The goal for these groups is to be similar to other powerful and influential groups who already have a significant level of control and influence. This means that the groups want to be in a position where they can make important decisions and have a significant impact on their environment.
Therefore, this could include decisions that affect the group itself, or decisions that affect the broader society or community in which the group operates.
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Which of the following accurately explains why along the same period, a non-metal has a smaller atomic radius than a metal?
A.Non-metals have an expanded octet
B. Non-metals have higher electronegativities
C. Non-metals have higher ionization energies
D. Non-metals have a higher effective nuclear charge
A non-metal has a smaller atomic radius than a metal along the same period because Non-metals have higher electronegativities.
What is metal?
Metal is an element that is widely used in many industries due to its ability to be molded and formed into a variety of shapes and sizes. It is a hard, dense, and durable material that is resistant to wear, corrosion, and extreme temperatures. Commonly used metals include iron, aluminum, copper, titanium, and steel. These metals have specific properties that make them ideal for use in a variety of applications. Iron is a strong metal used to make steel, which is used for construction and infrastructure. Aluminum is lighter than iron and is often used for objects that need to be moved frequently, such as aircraft and automobiles. Copper is an excellent conductor of electricity and is used in wiring and electronic components.
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A
graduated
cylinder
contains
of
buffer
solution.
The
density
of
the
buffer
solution
is
.
What
is
the
mass
in
of
the
buffer
in
the
cylinder?
Answer:
Explanation:
To calculate the mass of the buffer solution in the graduated cylinder, you would need to know the volume of the buffer solution in the cylinder and the density of the buffer solution.
d = m/v
Given that the density of the buffer solution is and the volume of the buffer solution in the cylinder is, if you multiply the density by the volume, you will get the mass in grams of the buffer in the cylinder
It's not possible to give you an exact number without the density and volume of the buffer.
HELPPPPP IM GIVING 100 POINTSSSS!!!!!!!!!!
Answer: O Surface weathering removed material from the rock.
Explanation: Weathering and erosion can cause wear down in rocks, which could be why the rock matter changed over time. Rock matter cannot evaporate since it's not in a liquid state and can't shrink by humidity either. Gravity does have some play in the change of rock matter, but not by compressing the material.
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Enter the chemical formula of a binary molecular compound of hydrogen and a Group 4A element that can reasonably be expected to be more acidic in aqueous solution than SiH4 , e.g. have a larger Ka .
The chemical formula for germanium hydride is GeH₄. Germanium hydride is a binary molecular compound of hydrogen and a Group 4A element, also known as a metalloid.
In an aqueous solution, germanium hydride can be expected to be more acidic than silicon hydride (SiH₄) due to differences in the elements' electron configurations.
Germanium has a higher electronegativity than silicon, which means that the electrons in the Ge-H bond will be pulled closer to the germanium atom, making the bond more polar.
This polar nature of the Ge-H bond makes it more likely to dissociate in water, leading to a higher acidity (larger Ka).
In conclusion, germanium hydride (GeH₄) is a binary molecular compound of hydrogen and a Group 4A element, known as a metalloid.
The higher electronegativity of Germanium compared to Silicon makes it more acidic in an aqueous solution. This acidity can be observed by its larger Ka ( acid dissociation constant) value.
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Before a chemical equation can be used to conduct stoichiometric analysis, it must balanced. Type the balanced chemical equation for this reaction between solid sulfur and oxygen gas. Express your answer as a chemical equation including phases. View Available Hint(s) ΑΣΦ ? S(s) +0,(g)SO, (g) A chemical reaction does not occur for this question
The balanced chemical equation for this reaction between solid sulfur and oxygen gas is 2S(s) + O2(g) → 2SO2(g)
what is chemical equation?
The symbolic representation of a chemical reaction is a chemical equation.It shows the reactants (starting materials) on the left side and the products (resulting substances) on the right side. The substances reactants and products are represented by their chemical formulas. The arrow between the reactants and products represents the yield of the reaction. A chemical equation must be balanced, meaning that the number of each type of atom on each side of the equation must be equal. Balancing a chemical equation involves changing the number of atoms in the reactant and product side of the equation so that the number of each type of atom is the same on both sides. Chemical equations are used to describe and predict the outcome of a chemical reaction.
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A solution with 8.35 g of a non-electrolyte solute in 50.0 g naphthalene (Kfp = 6.90°C/m) freezes at 76.5°C. Pure naphthalene freezes at 81.0°C. What is the molar mass of the solute?
The molar mass of the solution is obtained as 257 g/mol.
What is the molar mass of the solute?We know that the molar mass of the solute is something that we can be able to obtain from the formula for the change in the temperature of the substance.
Thus;
ΔT = K m i
ΔT = temperature change
K = freezing constant
m = molality
i = Vant Hoff factor
Then we have;
ΔT = 81.0°C - 76.5°C = 4.5°C
Thus;
4.5°C = 6.90 * m * 1
m = 4.5/6.90
m = 0.65
Then;
m = mass/molar mass/ Mass of solution in kilograms
0.65 = 8.35/M * 1/50 * 10^-3
M = molar mass
0.65 * 50 * 10^-3 * M =8.35
M = 8.35/0.65 * 50 * 10^-3
M = 257 g/mol
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