A sphere surrounds the atomic nucleus called the s orbital. There are shells within the sphere where an electron is more likely to be discovered right now. 1s is the smallest sphere. Greater than the 1s orbital are the 2s and 3s orbitals.
Each p orbital has two lobes, that are located on either side of the plane of the nucleus. The three p orbitals are equal in terms of size, shape, and energy, but they differ in how the lobes are orientated. These three orbitals are referred to as 2px, 2py, and 2pz because the lobes are located along one of the x, y, or z-axis. Similar to s orbitals, p orbitals grow in size and energy as the primary quantum number rises (4p > 3p > 2p).
sp3 orbital: One of a group of hybrid orbitals that result from mathematically combining one s orbital and three p orbitals to create four new equivalent orbitals that are directed toward the corners of a regular tetrahedron.
One of the hybrid orbitals created when one s orbital and one p orbital are mathematically merged to create two new equivalent, perpendicular orbitals is the sp orbital. With the exception of being closer to the nucleus, sp orbitals resemble p orbitals in appearance.
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BRIANLEST AND 30 POINTS
A student measures the density of a piece of plastic to be 0.90 g/ml. However, the accepted value for the density of that type of plastic is 1.1 g/ml. What is the percent error in her measurements?
The percentage error in the measurement of the student is 18.18%
How do I determine the percentage error?We'll begin by obtainig the absolut error. This can b eobtained as follow:
Measured value = 0.90 g/mLAccepted value = 1.1 g/mLAbsolute error = ?Absolute error = accepted value - measured value
Absolute error = 1.1 - 0.90
Absolute error = 0.2 g/mL
Finally, we shall determine the percentage error. This can be obatined as follow:
Accepted value = 1.1 g/mLAbsolute error = 0.2 g/mLPercentage error =?Percentage error = (Absolute error / accepted value) × 100
Percentage error = (0.2 / 1.1) × 100
Percentage error = 18.18%
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an ionic compound contains only a metal, m, and bromine. if analysis indicates that a 3.66 g sample of the compound contains 2.14 g of m, what mass of br in g is contained in 468 g of the mineral?
An ionic compound contains only a metal, m, and bromine. if analysis indicates that a 3.66 g sample of the compound contains 2.14 g of m then mass of br in g is contained in 468 g of the mineral is 273.63g
Ionic compound means a chemical compound composed of ions held together by electrostatic forces termed ionic bonding
Here given data is 3.66 g sample and in that 2.14 g of m and 468 g have to find mass of br = ?
So, m₁/m₂ = 3.66 g/2.14 g, w₁/w₂ = 468 g/w₂
Cross multiply this equation then
w₂×3.66 g/2.14 g×468 g
w₂ = 2.14 g×468 g/3.66 g =273.63g
w₂ = 273.63g
Mass of br in g is contained in 468 g of the mineral is 273.63g
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The work function of iron is 4.50 eV.
What frequency of light will create
photoelectrons with a KE of 1.88 eV?
The frequency of light will create photoelectrons is 1.54 x 10¹⁵ Hz.
What is the total energy of the photon?
The energy of the photon emitted by the light is calculated from the summation of kinetic energy of the photon and work function of the metal.
E = K.E + Ф
where;
Ф is the work functionK.E is kinetic energyE = 1.88 eV + 4.5 eV
E = 6.38 eV
1 eV = 1.6 x 10⁻¹⁹ J
E = 6.38 x 1.6 x 10⁻¹⁹ J
E = 1.021 x 10⁻¹⁸ J
The frequency of the light is calculated as follows;
E = hf
f = E/h
where;
h is Planck's constantf = (1.021 x 10⁻¹⁸ J) / (6.626 x 10⁻³⁴)
f = 1.54 x 10¹⁵ Hz
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The properties of an unknown substance can be compared to the properties of a known substance to identify the unknown substance.
True or false?
Answer: Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Explaination:
By using Physical properties unknown substance can be identified as it involves determination of a substance with out changing their composition or property include color, odor, taste, density, melting point etc.
What are the difference between physical and chemical property ?
Chemical properties can be observed or measured when a substance undergoes any type of changes chemically while Physical properties can be observed without changing anything.
In chemical property, chemical reaction is conducted to show the property of the substance while in physical property No chemical reaction occur.
Chemical properties related to chemical bonds while Physical properties do not have such a relationship.
Chemical properties include radioactivity, toxicity, flammability, heat of combustion, etc. while physical properties include Molecular weight, boiling point, melting point, freezing point, volume, mass, length, density shape, solubility, etc.
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how many liters of a 5.5% ( m/v ) glucose solution would you need to obtain 75 g of glucose? express your answer using two significant figures.
A total of 1363.63 liters volume of the 5.5% (m/v) glucose solution would be needed to obtain 75 grams of glucose from it.
The amount of glucose required is 75 gram.
The concentration of the solution that is provided to uses 5.5% mass by volume solution.
It means that one litre of the solution will contain 5.5% by mass concentration of glucose and it.
So, using the percentage formula,
Percentage = mass required/volume×100
Now, putting all the values accordingly,
5.5 = 75/V × 100
V is the volume of the solution required,
V = 1363.63 Litres.
So, a total 1363.63 liters of the 5.5% mass by volume glucose solution will be required in this case.
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Adjust the T₁ to the maximum (highest temperature). Record down the P₁, V₁
and T, from simulation, what is the Pressure if the gas expands to 1200L at
800K?
Answer:
P 1 T 1 = P 2 T 2
Combined gas law: P1V1/T1 = P2V2/T2 Use the gas laws for pressure, volume and temperature calculations.
Can you explain question 23 please
In regards to the question, it can be said that 25.7 g of solid methanol must be heated to its melting point to reach a temperature of
Q=2.6kJ
From the query, we learn
Determine the amount of heat needed to completely melt 25.7 g of solid methanol at its melting point.
In general, the mathematical formula for heat is
Q=N*u
Where
Methanol has a mass of 32.04g/mol.
Methanol's molar heat of fusion is 3200 J/mol.
How many moles are in 25.7g?
frac = 25.7g 32.04
n=0.8mol
Hence
at its melting point, 25.7 g of solid methanol needs to be heated to a temperature of
Q=0.8*3.2
Q=2.6kJ
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Question 1
1 pts
An initial test found the metal had a melting point of 2,286 Fahrenheit. Convert the
temperature into Celsius. (C-(F-32)/1.8).
Convert the temperature into Celsius from Fahrenheit is C = 1252.22°C
Equation :To convert Fahrenheit into Celsius we need to go through some simple steps :
C = (2286 - 32) 5 / 9
C = 2254 x 5 / 9
C = 1252.22°C
What is temperature ?The average kinetic energy of the particles in an object is measured by its temperature. The velocity of these particles likewise increases as the temperature rises. A thermometer or a calorimeter is used to determine the temperature. The direction of heat transfer when two bodies with different temperatures are kept in touch depends on the temperature. The kelvin is the SI unit (K).
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draw a skeletal (line-bond) structure of cis-1,4-dimethylcyclohexane. use a dash or wedge bond to indicate the relative relationship of substituents, where applicable.
Wedge bonding is a type of wire bonding that forms bonds by using ultrasonic power and force. It is a well-known approach that is widely employed in the semiconductor industry. A three-dimensional representation of a molecule in which simple lines represent bonds in the image's plane, wedge-shaped lines represent bonds toward the viewer and dashed lines represent bonds away from the viewer. Copper wire with a diameter of 500 micrometers (0.02 in) can be wedge bonded satisfactorily. Large-diameter copper wire can and does replace aluminum wire where high current carrying capacity is required or complex geometry is a concern. Manufacturers' annealing and process steps
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why is microwave explosive
Answer:
in the explanation:
Explanation:
Microwaves cannot explode. While they can produce enough heat to explode the object inside, the microwave itself is safe from explosion. They are vulnerable to electrical issues that cause fires, though.
Food in the microwave can explode, but the microwave doesn't. I don't know what you should possibly do, to microwave to explode lol!
8016
5. Write a short caption beside each picture to describe the process of covalent
bonding.
Hydrogen
Oxygen
Hydrogen
Water molecule (H₂O)
Two hydrogen atoms and one
oxygen atom are near
This hydrogen molecule (H2) covalent bonding model begins with 2 separate hydrogen atoms.
Hydrogen Molecule (H2)The simplest molecule that can exist is a hydrogen molecule. Electrostatic forces hold its two protons and two electrons together. The assemblage can exist in several energy levels, just as atomic hydrogen. Hydrogen atoms are never truly separate to begin with. They are constantly connected to something else. This model omits the hydrogen atoms rupturing their bonds with other atoms to simplify the process. It only concentrates on how two hydrogen atoms create covalent bonds with one another. The electrons of two hydrogen atoms are drawn to the proton of the other atom when they are sufficiently close to one another.The atoms share electrons because there is space in their outer energy levels for electrons and a strong enough attraction between them. Thus, a covalent bond is created.To learn more about Hydrogen Molecule refer:
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ally completed part b of experiment iht. in their second trial, they used half the mass of salt from their first trial. what trend would they expect to observe in the temperature change with respect to the mass salt they used in their first and second trials?
Given that we know that the mass of the compound used for the trials is related to the temperature difference, it is correct to state therefore that " Approximately half the mass of salt produced approximately half the temperature change" (Option A)
What is an experiment?An experiment is a technique that is carried out to support or deny a hypothesis, or to test the efficacy or probability of something that has never been done before. Experiments shed light on cause-and-effect relationships by revealing what happens when a specific element is changed.
Typically, the experimental variable is one or more of the sample attribute categories. It summarizes the differences between the test and control samples that you are studying.
The following are various types of experiments:
A laboratory experimentField Experiment.Natural Experiment.The totally randomized design is the most common experimental design.
The randomized block layoutLatin square patternsFactorial layoutsDesigns for split plots.Learn more about experiments:
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Full Question:
Ally completed part b of experiment IHT. In their second trial, they used half the mass of salt from their first trial. what trend would they expect to observe in the temperature change with respect to the mass salt they used in their first and second trials?
A) Approximately half the mass of salt produced approximately half the temperature change
B) No trend was observed
C) Approximately half the mass of salt produced approximately double the temperature change
Look at the photo below. It shows examples of heat transfer by conduction, convection, and radiation. Indicate which type of heat transfer is happening next to each letter.
C is conduction
a is convention
b is radiation
The number of neutrons does equal the ______ minus the _______ , or number of _____
the element calcium forms a with the charge fill in the blank 2. the symbol for this ion is , and the name is fill in the blank 4 ion. the number of electrons in this ion is .
The element calcium forms a cation with the charge +2. The symbol for this ion is [tex]Ca^{+2}[/tex], and the name is calcium ion. The number of electrons in this ion is 18.
Calcium is present in the second column of the periodic table with symbol Ca.
The number of electrons in this element are 20.
The electronic configuration of calcium is [Ne] 3s² 3p⁶[tex]4s^{2}[/tex] which shows that it has only two electron in its outermost shell.
Being an alkaline earth metal, calcium forms ions by the loss of two electron in the outermost shell.
Neutral calcium has 20 electrons, however, after the loss of two valence electrons it becomes a cation i.e. [tex]Ca^{+2}[/tex]
Since its easy for calcium to lose two outermost electron instead of getting 6 more electrons to achieve octet state.
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This is a chemical reaction for the decomposition of carbon acid into water and carbon dioxide: h2co3 h2o+co2 how does the reaction support the law of conservation of mass?
The above reaction that decomposes hydrogen carbonate to water and carbon dioxide supports the law of conservation of mass because the number of moles of the reactants equates that of the products.
What is the law of conservation of mass?The law of conservation of mass states that the mass of a substance can neither be created nor destroyed.
In a chemical reaction that involves the changing of substances called reactants to other substances called products, the law of conservation of mass explains that the amount of the reactants must be the same as the amount of products.
According to this question, the decomposition reaction of carbon acid into water and carbon dioxide is given as follows: H₂CO₃ → H₂O + CO₂
As observed in the above chemical equation, the amount of each element on both sides of the equation is the same.
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Solutions AandB have the same volume of solvent but solution A has more solute particles in it than B Solution Ais more….than B
What us the brackets
Solutions A and B have the same amount of solvent, but solution A contains more solute than solution B Solution A has more solute than B.
In a liquid reaction, the amount of solvent present exceeds the amount of solute. One good example of melting into our entertainment is salt and water. Salt is a solute because it dissolves in water. A solute is a substance that dissolves as if the solvent were a solvent medium. Different types and forms of solutes and solvents provide answers. Examples of availability proposals. As each solute molecule binds with various solvent molecules and does not evaporate every day, the vapor pressure decreases.
A solute can be a solid, liquid, or gas. The solute is also not in the same part as the solvent it is in on a daily basis. In carbonated beverages, for example, fuel bubbles (solute) are dispersed in a liquid solvent. Dissolving coffee grounds in hot water produces a coffee solution. In this answer, coffee powder is present in small amounts and hot water is present in large quantities. So in the espresso answer, the solute is espresso powder and the solvent is warm water.
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Consider the sn2 reaction between 1‑bromo‑2‑methylpropane and methoxide. Add curved arrows to the starting materials to indicate the flow of electrons. Draw the product species to show the balanced equation, including nonbonding electrons and formal charges.
1-bromo-2-methylpropane undergoes an Sn2 reaction with the methoxide to yield 1-methoxy-2-methylpropane (isobutyl methyl ether) and the bromide ion. Please see the reaction mechanism shown in the attached material.
Alkyl halides are excellent electrophiles because of the polar carbon-halogen bond that provides both the electrophilic carbon atom and the excellent leaving group in the form of the halide ion. When attacked by a nucleophile (such as the methoxide ion), they undergo an Sn2 reaction (bimolecular nucleophilic substitution).
The reaction mechanism of an Sn2 reaction consists of a single phase: the simultaneous attack by the nucleophile and the abstraction of the leaving group. This process implies that there is a transition state that contains a quasi-pentavalent carbon atom, as one bond is forming and the other is being dissolved.
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suppose that a chemical equation can be written as the sum of two other chemical equations. if two reactions have lh values of -658 kj and 458 kj, what is n{ for the reaction that is their sum? a. *1116kj c. 200kj b. -200 kj d. l i 16 kj
In accordance with Hess's law, the total enthalpy of the reaction in question would be -200 kJ.
Hess's law (also known as Hess's law of constant heat summation) states that regardless of the multiple steps or stages of a reaction, the total enthalpy change for the reaction is the sum of all stages. This means that if the reaction has two steps, their individual changes in enthalpy contribute to the total change in enthalpy for the sum reaction. In this case, one step is exothermic (-658 kJ), and the other is endothermic (458 kJ), but the overall reaction is still exothermic (-658 kJ + 458 kJ = -200 kJ) because the absolute value for enthalpy change in the first reaction is greater than the absolute value for enthalpy change in the second reaction.
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Explain the term ionic lattice.
Answer:
Ionic lattice is a Gaint structure where metal and non-metal is ionicly bonded by electrostatic attractions between the ions. This structure has strong intermolecular forces which is why the ionic lattice is in form of hard crystals.
Explanation:
If you need explanation don't hesitate to ask.
Answer:
An ionic compound is a giant structure of ions, the ions have a regular, repeating arrangement called an ionic lattice.
acid flux is designed to be used on nonelectrical metal joints such as radiators and must be removed after the soldering process so that the joint does not corrode.
It is true that acid flux is used on non-electrical metal joints, such as radiators but need to be removed so that the joint does not corrode after soldering.
Acid flux must be removed after soldering in order to prevent corrosion of the junction and is intended to be used on non-electrical metal connections, such as radiators.
A substance called acid soldering flux is applied to the joint between two pieces of metal to clean and shield it.
Fluxing achieves three objectives: it lessens oxidation, enhances electrical contact, and promotes uniform solder flow. Flux helps eliminate oxidation from the electrical lead you are soldering and blocks airflow to the lead, preventing additional oxidation.
Water-soluble flux is another name for organic acid flux. These organic acids, including citric, lactic, and stearic acid, are used to make this sort of flux. After that, organic solvents like alcohol or isopropyl are added to the acids. Metal oxides can be removed more successfully using organic acid flux.
As a result, it is accurate to say that acid flux must be removed after soldering in order to prevent corrosion of the joint on non-electrical metal components like radiators.
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how could you identify a monounsaturated fatty acid by looking at the structure of its chain? a. four or more carbon atoms in the chain have no hydrogen atoms attached. b. one double bond would be present. c. the chain contains multiple missing carbon atoms. d. the carbon chain is more than one-inch long. e. every carbon atom in the chain has a hydrogen atom attached.
We can identify a monounsaturated fatty acid by looking at the structure of its chain as:
b. one double bond would be present
Monounsaturated fat has only one double bond in its structure. This help reduce bad cholesterol levels in blood which lowers risk of heart disease and stroke. They also provide nutrients that help in developing and maintaining body's cells.
Monounsaturated fatty acids are acids having a single double bond, they have two hydrogen atoms deficit, and their two carbon atoms in the structure are connected by a double bond.
Monounsaturated fats are fat molecules that have one unsaturated carbon bond in the molecule. Oils that have monounsaturated fats are liquid at room temperature but start to turn solid when chilled such as canola oil and olive oil. Polyunsaturated fats contains two or more double bonds in its structure.
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What do substances that conduct electricity once they are dissolved have in common?
Answer:
They are ionic compounds.
Explanation:
Ionic compounds are made from a metal element and a nonmetal element. Ionic compounds have bonds that are the transfer of their electrons. They consist of a positively charged and negative charged ion.
When ionic compounds are dissolved in water, this means that the bonds from the compound are broken and now they will be bonding with the water molecules in water.
The electricity in the solution happens when these ions are moving around freely in water.
Liquid water can be separated into hydrogen gas and oxygen gas through electrolysis. 1 mole of hydrogen gas and 0.5 moles of oxygen gas is produced from 1 mole of liquid water collected in separate 10 l containers at 1 atm. will the temperature of the gases be equal
The temperatures of the gases will not be equal as oxygen gas will have a higher temperature than hydrogen gas because it has fewer moles overall.
Briefing :The mechanical behavior of ideal gases is described by the ideal gas law. It has the ability to compute the volume of gases created or absorbed.
This equation is frequently used in chemical equations to convert between volumes and molar quantities.
According to the ideal gas law, there is a relationship between gas pressure, temperature, and volume.
PV = nRT
V is the same for both
So,
T is same for both.
When n increases, T decreases, so since n for hydrogen gas is 1 and n for oxygen gas is 0.5, it follows that oxygen gas will have a higher temperature than hydrogen gas because it has fewer moles overall.
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To which organelle is the line pointing? What is its function?
A)
Golgi apparatus, packages proteins into vesicles
B)
Golgi apparatus, production of proteins
C)
Ribosome, packages proteins into vesicles
D)
Ribosome, production of proteins
The organelle in which the line pointing is Golgi apparatus and its function is to package proteins into vesicles which is therefore denoted as option A.
What is an Organelle?These refer to the structures which are found in cells which perform various types of metabolic functions in the cell and examples include ribosome, golgi apparatus etc.
The golgi apparatus is responsible for the packaging and transporting of biomolecule such as protein, lipids to their final destination for various types of purposes. This ensures adequate distribution of resources to other parts of the cell.
The shape is similar to that of series of stacked flat cisternae which ensures the adequate storage and transportation thereby making option A the most appropriate choice.
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Balance the following chemical reaction:
Al2(SO4)3 (aq) + K3PO4 (aq) → AIPO4 (S) + K2SO4 (aq)
Answer:
Al2(SO4)3 + 2 K3PO4 → 2 AlPO4 + 3 K2SO4
Explanation:
The balanced chemical equation for the given chemical reaction is Al₂(SO₄)₃ + 2 K₃PO₄[tex]\rightarrow[/tex] 2 AlPO₄ + 3 K₂SO₄.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Chemistry full in the blanks
Answer:
Explanation:
1 - Atomic number is the number of protons in an atom.
2 - Atomic Mass is the total number of protons and neutrons in an atom.
3 - Isotopes are atoms with the same atomic number but different atomic mass number due to the different number of neutrons in the nucleus.
4 - Relative Atomic Mass is the weight in grams of the atom of an element as it occurs in nature to 1/12th of the mass of the carbon-12 atom
5 - Mass Spectrometry is the technique to determine the mass of particles.
What do cars produce pls help
which substances are weak acids? choose all correct answers; there may be more than one correct answer. group of answer choices ch3cooh nh3 hclo2 hclo h2so4 ca(oh)2 hno3 h2s hf hi h2n2 hcl ch3nh2 hbr h3po4 koh hclo3 hclo4
Weak acids are Ca(OH)2,KOH.
What makes a weak acid?When the hydrogen atom and the other atom in the link are not sufficiently polar, weak acids can form because the hydrogen ion cannot be removed with ease. The size of the atom linked to hydrogen is another element that influences an acid's potency.
How do you determine a weak acid?Weak acids can occur when the hydrogen atom and the other atom in the connection are not sufficiently polar because the hydrogen ion cannot be easily withdrawn. Another factor that affects an acid's potency is the size of the atom that is connected to the hydrogen atom.
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How many molecules are in 23.2g NO2?
Answer in units of molec
Given Mass = 23.2 g
Molecular mass = 46 grams per mole
Mole = Given Mass / molecular mass
⇒ Mole = 23.2g / 46 = 0.504 mole
Number of molecules = number of moles x Avogadro's number
⇒ Number of molecules = 0.504 x 6.023 x 10^23
⇒ Number of molecules = 3.035592 x 10^23 = 0.035 x 10^23 (approx.)
What is Molecular mass?The mass of every given molecule is expressed in daltons and is known as the molecular mass (m). Due to the varying isotopes of an element that they contain, multiple molecules of the same substance can have distinct molecular weights. According to IUPAC, the related, unitless number known as relative molecular mass is the ratio of a molecule's mass to the Dalton, which is the unified atomic mass unit. While different from and connected to the molar mass, the molecular mass, and relative molecular mass are both important. A substance's molar mass, which is represented in grams per mole (g/mol), is determined by dividing its mass by its quantity.Thus, the molecular mass is the mass of one particular particle or molecule, but the molar mass is the average of several particles or molecules. When referring to macroscopic (weighable) amounts of a substance, the molar mass is typically the most relevant number.To learn more about Molecular mass, refer to:
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