The reaction is:
C + Fe2O3 → CO2 + Fe
Given:
Mass of C = 38.9 g
38.9 g C x (1 mol C / 12.011 g C) = 3.239 mol C
Since 1 mol C will produce 1 mol CO2 in the reaction, the number of moles of CO2 formed is 3.239 mol.
Mole is a unit of measurement used in chemistry to measure the amount of a substance, usually in terms of its mass. One mole of a substance is equal to its molecular weight in grams. The term originated from the Latin word ‘moles’, which means ‘mass’. Moles are commonly used to measure the amount of a substance in a given volume.
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Calculate the mass of 34.2 moles of calcium carbonate
Answer:
approximately 3423 grams
Explanation:
The molecular weight of CaCO3 is 100.0869
Therefore,
Mass = 34.2 × 100.0869
= 3422.97198
what is the number of nitrogen molecules that reacted with excess hydrogen to make 2 x 10000000000 molecules of ammonia?A. 3 X 10000000000B. 1 X 10000000000C. 2 X 10000000000D. 5 X 1000000000
The number of the nitrogen molecules that reacted with the excess of the hydrogen to make 2 × 10¹⁰ molecules of the ammonia is 1 × 10¹⁰ molecules.
The reaction is given as :
N₂ + 3H₂ ---> 2NH₃
The number of the molecules of the ammonia = 2 × 10¹⁰ molecules
1 molecules of the ammonia will produces the 2 molecules of the ammonia
The number of the molecules of the nitrogen = ( 1/ 2) ×2 × 10¹⁰ molecules
The number of the molecules of the nitrogen = 1 × 10¹⁰ molecules.
Thus, the molecules of the nitrogen is 1 × 10¹⁰ molecules.
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List several pieces of information you can determine about a chemical reaction just by reading the chemical equation.
Chemical reactions are the processes by which a material or substances change to create new compounds with new attributes.
What does "chemical reaction" mean?Through its symbols and equations, a chemical equation reveals information about the reactants and products. the proportion of reactants to molecules. The relative masses of reactants and products are taken into account when molecular masses are represented in grams as "Unified Masses" (U).
as an example of a chemical process:When one or more chemicals transform into one or more other compounds, a chemical reaction takes place. For instance, the reaction between vinegar and baking soda produces sodium acetate, carbon dioxide, and water, and the reaction between iron and oxygen results in rust.
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How much water will be produced by combustion of 25.0g of H2 in the precedence of 100.g of 02?
H2(g)+02(g) 2 H20(I)
The total amount of water produced is equal is 12.5 moles or 250g of H2O.
What is moles?Moles are small, burrowing creatures found in gardens, yards, and fields. They are members of the Talpidae family and most commonly found in the Northern Hemisphere. Moles are adapted to living underground, where they eat earthworms, grubs, and other small invertebrates. They also consume plant material and are known to damage lawns and gardens. Moles have large claws and a pointed snout which they use to dig tunnels and chambers.
The amount of water produced by the combustion of 25.0g of H2 in the presence of 100g of O2 can be calculated using the balanced equation and the law of conservation of mass. The equation shows that 2 moles of water is produced by the combustion of 1 mole of H2 and 1 mole of O2.
Since 25.0g of H2 is equal to 1.25 moles and 100g of O2 is equal to 5 moles, then the total amount of water produced is equal to 2 * 1.25 * 5 = 12.5 moles or 250g of H2O.
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What are the 4 types of verbal?
Interpersonal verbal communication, Intrapersonal, small group communication and Public communication are the four types of verbal communication.
You could find it easier to express your ideas, thoughts, feelings, and experiences by using various verbal communication techniques. You can use this to consider your personal strengths. You might describe yourself as tenacious, cooperative, or patient, for instance. It's critical to communicate your strengths, priorities, and expectations to others, especially if you plan to collaborate with them. Team members that are familiar with your working style and skill set may aid in your transition to your new position.
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The diagram below shows a sound wave moving through particles ofair. What evidence in the diagram shows that the sound wave is a mechanical wave?
The sound is a mechanical wave because; the sound wave causes vibration in the air.
What is a mechanical wave?We know that a wave is a mechanical wave when the direction of the wave motion is parallel to that of the motion that is producing the wave. Also for the mechanical waves, we know that they must be able to pass through matter.
Having this in mind, let us remind ourselves that sound moves through the air and its sets the particles of the air into vibration as we know as such sound is a mechanical wave.
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Missing parts;
The diagram below shows a sound wave moving through air.
What about the diagram that shows that the sound wave is a mechanical wave?
The sound wave was made by a machine.
The sound wave vibrates perpendicular to the direction of the wave motion.
The sound wave causes extra air particles to form.
The sound wave causes vibration in the air.
Use the variational method to obtain an upper limit for the ground state energy of the He atom using as trial function
However, the variational technique yields all states, but the trial function method does not (unless your trial function space contains the exact excited states).
Variational method: what is it?A mathematical technique called the variational approach is used to roughly compute the energy levels of challenging quantum systems. A solvable system's energies may also be roughly estimated using this technique, and the correctness of the method can then be determined by comparing the approximated and known energies.
E [ | ψ ⟩,⟨ψ |] =⟨ψ|H|ψ⟩−λ(⟨ψ|ψ⟩−1).
To calculate the variation, one uses the formula: E=|H|+|H|||.
Please take note that we regard | and | as independently variable.)
This indicates that the functional is stationary for the following: H|=|.
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Which process requires the release of energy
Vaporization
Melting
Sublimation
Deposition
Answer:
Vaporization and Sublimation require the release of energy.
Explanation:
Vaporization is the process of converting a liquid into a gas. It requires energy to break the intermolecular forces between the liquid molecules, so it releases heat energy.
Sublimation is the process of converting a solid directly into a gas, skipping the liquid phase. It also requires energy to break the intermolecular forces between the solid molecules and release the solid particles into the air, so it releases heat energy as well.
Melting and Deposition, on the other hand, are processes that occur with the absorption of energy.
Melting is the process of converting a solid into a liquid. It requires energy to overcome the intermolecular forces between the solid particles and create a liquid, so it absorbs heat energy.
Deposition is the process of converting a gas into a solid, it also requires energy to overcome the intermolecular forces between the gas particles and create a solid, so it absorbs heat energy as well.
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Answer: Deposition
Explanation: right for acellus.
Describe in detail the 3 different plate boundaries. This should be 5 to 6 sentences long and using your best grammar.
Paleomagnetism, The strength and direction of the earth's magnetic field at the time the rocks formed are preserved in many rocks.
Which rocks are mainly responsible for magnetism? Mostly in rocks that are igneous. Iron and other magnetic minerals can move and align with the planet's magnetic polarity when in the liquid stage of magma. These minerals are trapped in their original positions after the magma cools.Because minerals cannot move once they are cooled, this alignment reveals the polarity of the Earth's magnetic fields at the time the rock formed.Laterally deposited igneous rock layers will exhibit various mineral orientations and demonstrate how the planet's magnetic fields altered over time.The rocks include records of previous magnetic field reversals. Iron-rich minerals that function as small magnets are found in many rocks. These minerals start to develop as magma or lava cools.The magnetic minerals floating in the molten mass align themselves with the magnetic field because the molten rock has not yet fully hardened. These minerals "lock in" the magnetic field as numerous small compasses when the rock ultimately forms.To learn more about grammar sentences refer to:
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what mathematical tools do we use to determine the ratios of elements in a compound?
a. magnesium oxide
b. magnesium metal
c. oxygen
d. all answers are correct
The correct option is (d) i.e. all answers are correct, To determine the ratios of elements in a compound, we can use several mathematical tools such as:
1. The mole concept and Avogadro's number, which allows us to convert between mass and number of moles of a substance.
2. The chemical formula, which gives the ratio of atoms of each elements in a compound.
3. The law of definite proportions (also known as the law of constant composition), which states that the ratios of elements in a pure compound are always the same, regardless of the source or amount of the compound.
All these tools can be used to determine the ratios of elements in a compound like magnesium oxide (MgO) and magnesium metal (Mg), as well as in any other compounds.
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Coversion of 2-methyl-2-butanol to 2-chloro-2-methylbutane, with a curved arrow mechanism (this will have HCl as the reagent & I believe an SN1 reaction?)
Conversion of 2-chloro-2-methylbutane to 2-methyl-2-butene and 2-methyl-1-butene, with a curved arrow mecahnism (E2 reaction, I think with alcoholic potassium hydroxide)
Reaction of 2-methyl-2-butene and 2-methyl-1-butene with Br2 in CH2Cl2
In light of this, 2-methyl-2-butene is more stable than 2-methyl-1-butene. The relative stability of the product turns proven to be the crucial element in determining the primary product when a small size base is utilized for the elimination reaction, such as OH-, CH3O-, or EtO-.
This is due to the fact that major product is more frequently supplanted than minor product, making them more stable. In contrast to 2-Methyl-1-butene, we, therefore, created more 2-Methyl-2-butene. Zaitsev's rule is an empirical formula used to foretell the main byproducts of elimination reactions. The more stable alkene with the more strongly substituted double bond is the main product in an elimination process, according to this statement.
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A sealed vessel contains 0. 200 mol of oxygen gas, 0. 100 mol of nitrogen gas, and 0. 200 mol of argon gas. The total pressure of the gas mixture is 5. 00 atm. The partial pressure of the argon is responses 0. 200 atm 0. 200 atm 0. 500 atm 0. 500 atm 1. 00 atm 1. 00 atm 2. 00 atm 2. 00 atm 5. 00 atm.
Answer:
Below
Explanation:
Each exerts pressure proportional to its fraction of the total
total = .200 + .100 + .200 = .500 mol
argon is .200 of this
.200 / .500 * 5 atm = 2 atm
An 20.5 g sample of zinc metal has a volume of 5.5 cm3. Calculate the density of zinc.
Taking into account the definition of density, the density of an 20.5 g sample of zinc metal and a volume of 5.5 cm³ is 3.72 g/cm³
Definition of densityDensity is a scalar magnitude referring to the amount of mass in a certain volume of a substance or an object.
In other words, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
Dnsity of zincIn this case, you know that:
Mass= 20.5 gVolume= 5.5 cm³Replacing in the definition of density:
density= 20.5 g÷ 5.5 cm³
Solving:
density= 3.72 g/cm³
In summary, the density in this case is 3.72 g/cm³
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Which of these relationships is true of an uncharged atom?a. The number of protons is equal to the number of electrons.b. The number of positive charges is equal to the number of negative charges
The number of protons is equal to the number of electrons.
What is an atom?A chemical element is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or more negatively charged electrons that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.Daltons (Da), commonly known as the unified atomic mass unit, are frequently used to express the actual mass of an atom at rest (u). This quantity is equal to one-twelfth of a carbon-12 free neutral atom's mass, or around 1.66 1027 kg.Democritus, a Greek man, was contemplating something when he was sitting around 2,500 years ago. He had the thought of chopping things up when he realised there had to be a purposeTo learn more about atom refers to:
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A student is trying to identify the composition of a pure metal block by determining its density. The student records the mass of the sample to be 20.0 g. The rectangular block is 1.00 cm x 4.00 cm * 1.40 cm. 7th attempt M See Periodic Table See Hint Calculate the density (in g/cm2). Express your answer to the correct number of significant figures. Answer: g/cm > 6th attempt
The necessary equation to determine the density of the block is "d = 25 g / 8.4 cm".
Define density?The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used. Mass divided by volume is the formula for density in mathematics: display style rho = frac mV. where m is the mass, V is the volume, and is the density.Density is the measure of an object's mass per unit volume. Kilograms per cubic meter (kg/m3) is the SI unit for density.The amount of something per unit of length, area, or volume: as. : the substance's mass per unit volume. given in grams per cubic centimeter is density.To learn more about density refer to:
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The provided metal block will have a density of 3.57 g/cm².
Why is metal density important?A material's specific gravity can be used to comprehend density in terms that are more relatable by measuring a substance's mass per volume. The ratio of a material's density to that of water is known as specific gravity. It is a relative (unitless) way to express how much something weighs.
What causes metals to be dense?Because their atoms are tightly packed together in a tiny area, metals have a high density. Metallic bonding is mostly to blame for this. Strong electrostatic attraction between metal cations and delocalized electrons is known as metallic bonding. As a result, the crystalline lattice structure is arranged in a predictable way.
Calculation:Volume of the given block = 1.00 x 4.00 x 1.40
⇒ Volume = 5.6 cm³
Density = mass/volume
⇒ Density = 20/5.6 = 3.57 g/cm²
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Draw a chiral aldehyde with the formula C3H5BrO.
You do not have to explicitly draw H atoms. In cases where there is more than one answer, just draw one.
The structure of chiral aldehyde with the formula C3H5BrO would have an aldehyde group at C1 atoms and Br attached to the terminal C atom of the chain.
An organic substance with a -CHO functional group is an aldehyde. We can start by drawing a linear chain with the substituents and then draw branched carbon chains at non-equivalent carbon atoms to create all the structures. According to the nomenclature rules for organic compounds, C3H5BrO can be named as 2-bromopropanal or 2-bromo-propionaldehyde. This compound will have an aldehyde group at C1 and a methyl group and a halide group attached to C2 atom of the chain.
Aldehydes are recognised as organic substances because they have a -CHO functional group. It has a carbonyl centre, which implies that a carbon atom will form a double bond with an oxygen atom and that the same carbon centre is joined to an alkyl group or additional hydrogen atoms.
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What is the percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen? 2H^2 + O^2 —-> 2H^2O
If 4 grams of hydrogen with excess oxygen make 18 grams of water, what is the yield in percentage terms? 2H^2 + O^2 —-> 2H^2O
Is hydrogen a liquid or a gas?Hydrogen is a gas at standard conditions of temperature and pressure, but around -423 degrees Fahrenheit, it condenses into a liquid (minus 253 degrees Celsius).
Where can you find hydrogen?The majority of stars and the sun include it, and the planet Jupiter is primarily made of it. Water has the most hydrogen on Earth. All that can be discovered of it as a gas in the air is less than 1 part per million by volume.
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Mg(OH)2 + 2HCI --> MgCl2 + 2H₂O
How many moles of water form from one gram of magnesium hydroxide?
Mg3N2:Mg(OH)2:Mg(O H)2 has a mole ratio of 1:3 (Mg3N2:Mg3N2:Mg(OH)2:Mg(O H)2). Following are the moles of Mg(OH)2 Mg(O H)2 that can be generated from 0.21401 moles of Mg3N2 Mg3 N2.
How many moles of magnesium hydroxide are present?Magnesium hydroxide weighs 12.5 g. One mole of magnesium hydroxide is equivalent to the molar mass, which should be 58.3 grammes. Therefore, we need to figure out how many moles there are. Hydroxide of magnesium, 214 moles.The molar mass of an element's atoms is determined by multiplying its standard relative atomic mass by the molar mass constant, 1 103 kg/mol = 1 g/mol.Consequently, the mass of a mole of magnesium atoms is given by NA x 24.305 amu x (1.66054x10-24 g/amu) = 24.305 g. The mass of a mole of magnesium atoms is 24.305 g.Molecular weight expressed in grammes a substance's molecular weight in grammes, expressed as mass.To learn more about moles refer to:
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What is the molarity of 1. 5 liters of an aqueous solution that contains 2 moles of lithium fluoride, lif.
The molarity of that aqueous is 1.3 M. As per given information already contain moles and volume, all you have to do is divide the moles with volume.
How to calculate the molarity of that aqueous?Molarity or symbolize as M is the total amount of a substance in the certain volume of a solution. Molarity in a correlation with mole and volume are defined as the moles per liter. Molarity is also called as the molar concentration of a solution. In formula, molarity(M) will be represent as M = m : V. As per data given m = 2 moles and V = 1.5 liters. The value of its molarity will be:
M = m : V
M = 2 : 1.5
M = 1.3 M
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Draw (on paper) a Lewis diagram for CH3CH2CH2OH
Use your diagram to answer the following questions.
The number of C-H bonds =
The number of O-H bonds is
The number of C-C single bonds =
The number of C-O single bonds =
The total number of lone pairs =
The structure of ethanol is shown below. As a result, the molecule CH3CH2OH C H 3 C H 2 O H is polar. Both a Lewis acid and a Lewis base, CH3CH2OH C H 3 C H 2 O H, can function.
Due to the oxygen atom's lone pair of electrons, it is primarily a Lewis base. The most polar of these is the O-H bond. The difference in electronegativity between the two atoms involved can be used to explain it. Ethanol, with the chemical formula CH3 CH2 OH, contains hydrogen bonds. Covalent bonds between hydrogen atoms produce hydrogen bonds. However, CH3CH2OH alone displays hydrogen bonding, which is substantially stronger than the intermolecular forces that are present in the other options.
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Using the Lewis diagram, I was able to determine that: 1) there are 7 C-H bonds, 2) there are 1 O-H bonds, and 3) The C-C bond count is 2, 4) The C-O bond count is 1, 5) There are 2 lone pairings.
Lewis diagram, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms in molecules as well as any lone pairs of electrons that may be present. Any covalently bound molecule, as well as coordination compounds, can be represented by a Lewis structure. Gilbert N. Lewis introduced the Lewis structure in his 1916 essay The Atom and the Molecule, and it bears his name. By adding lines between atoms to indicate shared pairs in a chemical bond, Lewis structures expand on the idea of the electron dot diagram.
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What is the final acceptor of electrons from NADH and FADH2?
The final electron acceptor of NADH and FADH2 is oxygen
Electron transport is the final process of aerobic respiration that occurs in the inner mitochondrial membrane. The goal of electron transport is to generate energy from the NADH and FADH produced by the previous steps in aerobic respiration (glycolysis, oxidative decarboxylation, and the Krebs cycle).
FADH and NADH are broken down into FAD+ and NAD+ and then hydrogen atoms are removed respectively. Hydrogen is brought into the mitochondrial matrix via ATPase, then the incoming hydrogen atoms will convert ADP into ATP. Then the hydrogen ions are captured by oxygen and produce water molecules or H2O. This is why oxygen acts as the final electron acceptor
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What is the electron configuration of Cd4+?
Is it [Kr] 4f145d8 ?
The electronic configuration of Cd4+ is [Kr] 4d7 5s1.
Electronic configuration also termed as electronic structure as well as electron configuration. It is the arrangement of the electrons in orbitals around an atomic nucleus.
Cadmium is a transition metal which is poisonous in nature. It is denoted by the symbol "cd". Cadmium is located in the d-block elements and the 12 group of the modern periodic table which is possessing an atomic number of 48 and its atomic mass will be 112.411g. The color of the cadmium is silvery grey metallic and the density will be 8.6g/cm3. It commonly used as a sacrificial anode to protect steel and iron from corroding and it is also used in nickel-cadmium batteries.
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which substance produces hydrogen ions in aqueous solution
Draw the lewis structure and identify the three molecular geometrys for CH3SO2H, C(CH2)2 and CH3NCO
The molecular geometry of CH3NCO is: Linear
The molecular geometry of CH3SO2H is: T-shaped
The molecular geometry of C(CH2)2 is: Linear
Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the bonding between atoms in a molecule as well as any lone pairs of electrons that may occur. Any covalently bound molecule, as well as coordination compounds, can be represented by a Lewis structure. Gilbert N. Lewis, who introduced the Lewis structure in his 1916 paper The Atom and the Molecule, was named after it. Lewis structures expand on the electron dot diagram concept by adding lines between atoms to indicate shared pairs in a chemical bond.
The Lewis structure for CH3SO2H, C(CH2)2 and CH3NCO are:
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1. Draw the equilibrium mechanism between caffeine and aqueous acid.
2. Using resonance structures, explain why one nitrogen is more basic than the others. (Hint: Only one nitrogen can resonate a positive charge around the ring once protonated.)
Caffeine is a natural stimulant found in coffee, tea and cacao plants. In acidic medium it will get protonated and become a conjugate acid.
Caffeine in an acidic medium acts as a base and accept a proton from the acid. The proton is accepted by the double bonded nitrogen in the imidazole ring. This later occurs in resonance with two other structures. The conjugate acid is soluble.
While comparing the resonance structures, we could see that one nitrogen is more basic than the others. This is because all the other nitrogen atoms are covalently bonded with surrounding atoms and stable by completing octet. But in the case of nitrogen in the imidazole ring it has a lone pair of electron, which is available for donation and protonated easily. So the nitrogen numbered 1 is more basic.
So in acidic medium caffeine acts as a base, get protonated and form a conjugate acid, which is soluble.
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what cup can keep the heat/cold in the longest?
Answer:
Stanley Classic Trigger Action travel Mug
Explanation:
The Stanley Classic Trigger Action travel mug offers heat retention for an impressive seven hours. It also keeps cold beverages chilled for 10 hours, and iced beverages icy for a whopping 30 hours.
Extra:
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Identify one way to improve models of electron dot structure
Electron dot structures or Lewis dot structures can be improved by adding valence electrons of each atom and then representing them in form of dots.
What are Lewis dot structures?Lewis dot structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .
They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.
They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.
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Compare a jug of ice water and a glass of water at room temperature. The difference in temperatures can be explained by the fact that
2
Answer:
5.30 is the probability of a no longer exists in a singie than the first half in a video of a different characters are
Answer:
ice water by its temperature it makes you want more to drink. while room temperature feels like you need more and more water to not feel dehydrated
Explanation:
Fill in the blanks: Repeating an experiment several times and averaging the results helps to
reduce
Averaging the data from multiple iterations of an experiment can assist to cut down on errors.
What do you mean experiment?An action or method carried out under controlled circumstances in order to ascertain a hypothesis, discover an undiscovered effect, or establish a law. To establish cause-and-effect, or if changes in one variable might affect changes in another, researchers frequently conduct a straightforward experiment. Experimentation is a research method that involves deliberately changing one or more variables and then observing the outcomes or impacts on other variables. In experimental designs, controls are routinely employed to track system variability and search for error sources.
Why is experiment important?We can make better decisions about our ideas and projects by experimenting. People frequently make the error of taking an idea and running with it without first evaluating the underlying premises. Although we frequently don't know, we only presume when we think we do. The reason why experimentation is so crucial to science is because it gives researchers a set of organised processes to take in order to respond to queries or claims about the natural world. Additionally, experimentation generates crucial data and findings to support the validity and reliability of claims made in an effort to comprehend the world more fully.
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How does temperature affect physical and chemical changes please make it short!
Answer: Increasing or decreasing the temperature will cause chemical changes to occur faster or slower. Physical changes turn solids into liquids and liquids into gases when you increase the temperature. Decreasing the temperature turns gases into liquids and liquids into solids. Hope this helps!