Answer:
If an element has 3 valence electrons, it means that it can form chemical bonds with other atoms by sharing or transferring those 3 valence electrons. The resulting compound will have a chemical formula and properties that depend on the specific elements involved in the bonding and the arrangement of the atoms in the compound. Some elements with 3 valence electrons include boron (B), aluminum (Al), and phosphorus (P). These elements are commonly found in compounds such as borax (Na2B4O7), alum (KAl(SO4)2), and phosphoric acid (H3PO4), respectively.
A student notices that the Periodic Table has most of the elements with common properties grouped together. This
means that nonmetals tend to be grouped together, metals tend to be found together, and metalloids tend to be
placed together on the table. Which property can be associated with nonmetals, since they are found together on
the Periodic Table?
A Nonmetals tend to be gases or liquids at room temperature and are found on the right side of the
table.
*B
C
D
Nonmetals tend to be on the top of the Periodic Table and are brittle.
Nonmetals tend to be on the bottom half of the Periodic Table and tend to conduct electricity
well.
Nonmetals tend to be shiny and malleable and are found on the left side of the table.
Answer:
A
Explanation:
"Nonmetals tend to be gases or liquids at room temperature and are found on the right side of the table."
This can be observed using a labelled periodic table.
In a control experiment, to validate the amount of HCl neutralized by an antacid, identify the item that would not be present.
Antacid
NaOH
HCl
Phenolphthalein
In a control experiment, to validate the amount of HCl neutralized by an antacid, at the end of experiment antacid would not be present.
The following net-ionic equation describes how a strong acid and a strong base react together: H₃O⁺(aq) + OH⁻(aq) → 2H₂O(l). The pH of the resulting solution can be calculated from the concentration of the excess reactant if either the acid or the base is in excess. The solution has a pH of 7.00 at 25°C if the acid and base are equimolar.
What is a strong base reaction?Contrarily, weak bases only partially react with water to form hydroxide ions, whereas strong bases completely react to form the hydroxide ion. A strong acid and strong base react by neutralizing one another, which results in the production of salt and water.
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Is 20% NaCl hypertonic?
20% NaCl is hypertonic.
What is hypertonic solution?
A hypertonic solution is any external solution that has a high solute content and a low water concentration compared to body fluids. In a hypertonic solution, water will often transfer from the body into the solution.
A solution that is hypertonic includes more solute particles (such as salts and other electrolytes) is frequently found in blood plasma and cells. Osmotic pressure of the interior of cell is equals to 0.9 % NaCl solution, which is called physiological saline.
Therefore, 20% NaCl is hypertonic.
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When 50g of sugar is dissolved in 100g mL of water there is no increase in volume what characteristics is illustrated by this observation?
This observation illustrates the concept of a solution's solubility, which is the amount of solute that can be dissolved in a given amount of solvent at a certain temperature. In this case, the sugar is said to be highly soluble in water, as it was able to dissolve completely in the given volume.
What is solubility?Solubility is the property of a substance to dissolve in a solvent to form a homogeneous solution. It is a measure of the maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature and pressure. Solubility is an important factor in many areas of science, including chemistry, pharmacy and environmental science.
This observation also shows that the sugar does not take up any additional volume when dissolved, as its molecules are small enough to disperse evenly throughout the solvent.
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Suggest one reason why Newlands placed hydrogen in the octave shown
Answer:
because H (hydrogen) is very reactive with other elements
Explanation:
What are the elements at the bottom of the table called?
Answer:
inner transition elements.
Explanation:
right answer
calculate the ksp for silver sulfate if the solubility of ag2so4 in pure water is 4.5 g/l.
The ksp for silver sulfate if the solubility of ag2so4 in pure water is 4.5 g/l is 1.2x10-5.
The Ksp is the solubility product, which is the product of the ions increased to their coefficients. This is based on the chemical equation's mole ratio. The stoichiometry of the dissolving reaction influences the relationship between solubility and solubility product constant. When two ionic compounds share an ion, the solubility of a sparingly soluble ionic material is considerably reduced in a solution of another ionic molecule.
The equilibrium constant for the dissolving of a solid material into an aqueous solution is the solubility product constant. It's represented by the symbol Ksp. The solubility product is a type of equilibrium constant whose value varies with temperature.
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Which of the components of the box model is transparent and does not take a background color?.
The components of the box model is transparent and does not take a background color is Margin
Whatever color is allocated to the container that the elements are in will be used as the margin color. Therefore, simply set the parent element's color as needed.
It requires a background color because the margin is completely transparent and lacks a background color. It is made clear what area the piece is in.
It is the area surrounding a component. On a page, margins can be used to move an element left, right, up, and down.
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What are the 4 main sectors that contribute to carbon emissions?
The four main sectors that contribute to carbon emissions are Energy, Industrial Processes, Agriculture, and waste.
Energy: This sector includes the production, distribution, and use of energy from fossil fuels such as coal, oil, and natural gas.Industrial processes: This sector includes the production of goods such as cement, steel, and chemicals, which emit GHGs during the manufacturing process.Agriculture, forestry, and other land use: This sector includes activities such as the cultivation of crops, raising livestock, and the clearing of forests, which can emit GHGs due to the decomposition of organic matter.Waste: This sector includes the collection, treatment, and disposal of waste, which can emit GHGs due to the decomposition of organic matter in landfills.These four sectors are responsible for the majority of GHG emissions globally. Reducing emissions in these sectors is essential for mitigating climate change and achieving net-zero emissions. This can be done through a variety of measures, such as increasing energy efficiency, transitioning to renewable energy sources, adopting more sustainable land use practices, and reducing waste.
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What would be the freezing point of aqueous solution containing 18 gram of c6 h12 o6 in thousand gram of water?
The freezing point of aqueous solution containing 18 gram of c6 h12 o6 in thousand gram of water is -1.76°C.
What is aqeous solution?Aqueous solution is a solution created by dissolving a solid, liquid, or gaseous substance in water. Water is the most common solvent used to create aqueous solutions, and it is universal solvent due to its chemical properties. Aqueous solutions are a common form of solution found in every day life, such as in household cleaners, cooking ingredients, and even medication. Aqueous solutions are incredibly useful and versatile, as they can be easily manipulated with other substances to create various different solutions.
This is because the freezing point depression of a solution is proportional to the amount of solute present. The freezing point depression for a 1 molar solution of glucose is 1.86°C, so the freezing point of a solution containing 18 grams of glucose in 1000 grams of water is calculated as 1.86°C x (18/180) = -1.76°C.
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We can see water change state, from ice to steam. This is a __________ change in matter.
How do you know if sanitizer is too strong or too weak?
If sanitizer is added to the water, it won't be enough to adequately eliminate the microorganisms that cause foodborne disease. If there is an excessive amount of sanitizer added to the water, it may dry on dining tables and kitchen countertops.
How should one go about figuring out whether a sanitizer is too strong or too weak?Using test strips, verify that the sanitizer is neither either too strong or too weak. The sanitising combination should only receive the precise amount of water.
How can you tell if the concentration of the cleaning solution is correct?Over time, a chlorine bleach sanitising solution starts to lose part of its effectiveness. The sanitising solution must therefore be evaluated using test strips.
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What is everything to know about chemical bonding?
Explains other concepts such as molecules and reactions.
Explanation: Bond parameters, covalent compounds, hybridisation, hydrogen bonding, ionic or electrical ent compounds, and resonance structures
a sample of a pure, gaseous hydrocarbon is introduced into a previously evacuated rigid 1.00l vessel. the pressure of the gas is
The pressure of a sample of pure, gaseous hydrocarbon introduced into a previously evacuated rigid 1.00L vessel will be 0.00 atm.
The sample of gas is pure, so the pressure will depend only on the number of molecules in the vessel and the temperature. This can be calculated using the Ideal Gas Law, which states that ,
PV=nRT.
The term n is the number of moles of gas, R is the gas constant (8.314 J/(K⋅mol)), and T is the temperature in Kelvin.
Therefore, the pressure can be calculated as:
P = nRT/V
Where P is the pressure in atm, V is the volume of the vessel in liters, and n and T are as described above.
Since the sample of hydrocarbon is pure, the number of moles (n) can be calculated from the mass of the sample. Assuming the sample is introduced into the vessel at room temperature (25°C = 298K), the pressure of the gas can be calculated as:
P = (m/M)(8.314 J/(K⋅mol))(298 K)/1.00L
Where m is the mass of the sample and M is the molar mass of the hydrocarbon.
Therefore, the pressure of a sample of pure, gaseous hydrocarbon introduced into a previously evacuated rigid 1.00L vessel will be 0.00 atm.
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Classify These Atoms And Ions As Paramagnetic Or Diamagnetic.
The atoms and ions that are paramagnetic are [tex]Mn^{2+}[/tex] and Sn and the atoms and ions that are diamagnetic are [tex]Al^{3+}[/tex] and Zn.
What is paramagnetic and diamagnetic?Paramagnetic ions or atoms are when the ions or atoms have at least one unpaired electron. Diamagnetic ions or atoms are when the atoms or ions don't have any unpaired electrons.
To find if the ions have unpaired electrons or not, we must write electron configuration. So,
For [tex]Mn^{2+}[/tex] electron configuration is [tex][Ar]3d^54s^0[/tex], it is paramagnetic.
For [tex]Al^{3+}[/tex] electron configuration is [tex][He]2s^22p^63s^03p^0[/tex], it is diamagnetic.
For Zn electron configuration is [tex][Ar]3d^{10}4s^2[/tex], it is diamagnetic.
For Sn electron configuration is [tex][Kr]4d^{10}5s^25p^2[/tex], it is paramagnetic.
Your question is incomplete, but most probably your full question was
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What’s the correct sorting function to list Colors in alphabetical order (A to Z)? What value would be returned based on the formula in Cell A49? A B 29 Color Number 30 Red 100 31 Orange 112 32 Yellow 90 33 Green 85 34 Blue 120 Image not displaying? ASCENDING DESCENDING EQUAL TO A TO Z А 43 npab 44 npce 45 npfo 46 npbb 47 norp 48 49 =COUNTIF(A43:A47,"NP*") Image not displaying? 0 1 O 2 03 04 05
The correct sorting function to list Colors in alphabetical order is Ascending.
The value would be returned based on the formula in Cell A49 is 4.
What is the function?A function is simply the code that one can use over and over again, rather than writing it out multiple times. In this case, it'll be illustrated in an ascending order.
Also, the formula: =COUNTIF(range;"*"). Range is defined cell range where you want to count the text in Excel and wildcard * is criteria for all text occurrences in the defined range.
The answer is 4, there were four instances of Np in the given range of five cells.
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a chemist wants to mix a 70% saline solution with a 8 liters of a 25% saline solution to create a solution with 40% salt. how many liters of the 70% solution does she need? (saline is a mixture of salt and water)
4 liters of the 70% solution are required by the chemist.
briefly:-8 liters of saline solution divided by 25%
Saline solution at 25% = 0.25 x 8 = 2 liters
Let there be x liters of saline solution at 70%.
Salt = 8 plus x
40% of salt is equal to 25% of saline solution plus 70% of saline solution.
2 + (70/100)x = (40/100)(8 + x)
2 + 0.7x = 0.4(8 + x)
2 + 0.7x = 3.2 + 0.4x
assemble similar terms0.7x - 0.4x = 3.2 - 20.3
x = 1.2
x = 1.2 / 0.3
x = 4
4 liters of the 70% solution are required by the chemist.
How can the volume of a dilution be determined?The following equation can be used to determine the volume or concentration of a concentrated or diluted solution: M1V1 = M2V2.
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Consider the reaction A-->B The rate of the reaction is 1.6 x 10^-2 M/s when the concentration of A is 0.11 M. Calculate the rate constant if the reaction is first order in A. (Give units.) Calculate the rate constant if the reaction is second order in A. (Give units.)
The rate constant of a first-order reaction is 0.145 s⁻¹. The rate constant of the second-order reaction is 1.322 M⁻¹s⁻¹.
What is the rate of the reaction?The rate of reaction can be demonstrated as the speed at which the products in a chemical reaction are produced from the reactants. Rate gives information on how much time is required for the reaction to be completed.
The rate of reaction can be defined as the speed of a reaction at which reactants are converted into products. Some reactions can be instantaneous, while some take a little longer to achieve the final equilibrium.
Given, the reaction is A → B
Given, the rate of reaction = 1.6 × 10⁻² M/s
The initial concentration of reactant A = 0.11 M
The rate constant of first-order reaction, Rate = k [A]
1.6 × 10⁻² = k ×0.11
k = 0.145 s⁻¹
The rate constant of second-order reaction, Rate = k [A]²
1.6 × 10⁻² = k ×(0.11)²
k' = 1.322 M⁻¹s⁻¹
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What special equipment did aristotle use to develop and support his atomic model?
Answer: He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air.
Explanation: Aristotle did not believe in the atomic theory and he taught so otherwise. He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air. He believed all substances were made of small amounts of these four elements of matter.
What force forms ionic bonds?
Answer: electrostatic force
Explanation:
Oppositely charged particles attract each other. This attractive force is often referred to as an electrostatic force. An ionic bond is the electrostatic force that holds ions together in an ionic compound
Classify the following solvents as either protic or aprotic solvents.
The protic solvents include NH3, HCONH2, and (CH3)2CHOH.
The aprotic solvents include N(CH3)3, CH3NO2, and CH2Cl2.
An oxygen (O), nitrogen (N), or fluoride atom is bonded to a hydrogen atom in a protic solvent (F). Protic solvents are generally any solvents that have a labile H+.
(CH3) (CH3) Because one of the hydrogens in 2CHOH is linked to oxygen, it is a protic solvent (O)
CH3NO2 is an aprotic (i.e not a protic solvent) solvent because all the hydrogens are bound to carbon.
CH2Cl2 is an aprotic solvent because all the hydrogens are bound tocarbon.
NH3 is a protic solvent because all the hydrogens are bound to Nitrogen (N)
N(CH3)3 is an aprotic solvent because all the hydrogens are bound to carbon
HCONH2 is a protic solvent because two of the hydrogens are bound to Nitrogen (N)
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complete question:
Classify each solvent as protic or aprotic. a. (CH3)2CHOH c. CH2Cl2 e. N(CH3)3 b. CH3NO2 d. NH3 f. HCONH2
Which atoms are in all carbohydrates?
Carbohydrates require carbon as their primary component. There is carbon in every known carbohydrate. All carbohydrates also contain hydrogen and oxygen atoms, with the exception of a few simple sugars, which only contain carbon and hydrogen atoms.
Carbon, hydrogen, and oxygen atoms make up the macromolecules known as carbohydrates. They are a significant energy source. They can be found in fruits and vegetables as sugars, starches, and fibre. What categories do the carbs fit into? Starchy meals are complex carbohydrates because they include two or more sugar units. Compared to simple carbs, complex carbohydrates' molecules digest and transform more slowly. They are widely distributed in whole-grain bread, cereals, lentils, beans, peanuts, potatoes, peas, and corn. As one of the three primary macronutrients, carbohydrates are one of the three.
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Determine the temperature required for 0. 0470 mol of gas to fill a balloon to 1. 20 l under 0. 998 atm pressure.
What would happen if there was no H+ gradient created in the mitochondrial membrane?
If protons (H+) were able to freely move across the mitochondrial membrane, cellular respiration will not occur.
Mitochondria are encased in a double-membrane system made up of inner and outer mitochondrial membranes separated by an intermembranous space. The inner membrane has numerous folds (cristae) that extend into the organelle's interior. In the critical process of oxidative phosphorylation, the electrochemical proton gradient across the inner mitochondrial membrane drives ATP synthesis. This is made possible by the previously mentioned membrane-bound enzyme ATP synthase.
The electron transport chain creates a proton gradient across the inner mitochondrial membrane, causing chemiosmosis to drive ATP synthesis. The proton gradient across the cristae membrane is produced by three large membrane protein complexes of the respiratory chain in the cristae, known as complexes I (NADH/ubiquinone oxidoreductase), III (cytochrome c reductase), and IV (cytochrome c reductase) (cytochrome c oxidase).
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Diphenylmethanol Infrared Spectrum 1.005 1.000 0.995 0.990 Transmitance чалгү 0.985 0.980 0.975 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 750 Wavenumbers (cm-1)
Interpret the IR spectrum of Diphenylmethanol.
Absorption of free OH bonds occurs at about 3650 cm⁻¹ Since it is a free hydroxyl group, the frequency range is high. This result indicates that there are no hydrogen bonds.In the IR spectrum, we see that the peak is around 3100–3000 cm⁻¹, telling us that this range represents the range of aromatic CH molecules (sp 2 CH).In addition, we see a peak around 2900 cm⁻¹, which is the presence of the Sp 3 CH bond band.The aromatic part of the compound contains an asymmetric C=C bond with an IR absorption peak of about 1630 cm⁻¹The compound contains CO bonds, for a frequency this voltage is detected at about 1050 cm⁻¹.Diphenylmethanol is an organic compound with the formula (C₆H₅)₂CHOH. Also known as benzhydryl, it is a white solid and the parent member of the large class of diary alcohols.
Infrared (IR) spectroscopy is a method that observes the interaction of molecules with electromagnetic radiation in the wavelength region of 0.75 – 1,000 µm or at wave numbers of 13,000 – 10 cm⁻¹
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The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume. Together these two gases make up approximately 99% of the dry atmosphere. Why are these gases important?.
Answer:
Explanation:
Nitrogen and oxygen are important components of the atmosphere because they are essential for life on Earth.
Nitrogen makes up about 78% of the Earth's atmosphere by volume, and it is an important component of proteins, nucleic acids, and other biomolecules. It is also a vital component of the Earth's nitrogen cycle, which is the process by which nitrogen is converted into various forms and transported through the environment.
Oxygen makes up about 21% of the Earth's atmosphere by volume, and it is essential for respiration and the production of energy in living organisms. It is also a key component of the Earth's carbon cycle, which is the process by which carbon is exchanged between living organisms, the atmosphere, and the Earth's surface.
Together, nitrogen and oxygen play important roles in the functioning of the Earth's ecosystems and the support of life on the planet.
for n2 at 298 k, what fraction of molecules has a speed between 200 and 300 m/s?
For N2 at 298 K, 0.071 fraction of molecules has a speed between 200 and 300 m/s.
Molecular speed is defined as the speed of a group of molecules in an ideal gas. The concept of molecular speed is critical in gas kinetic theory. According to the kinetic theory of gases, the molecules of a gas are constantly moving and follow a straight route until they collide with another molecule.
The speed of molecules in a gas is proportional to temperature and inversely proportional to the molar mass of the gas. In other words, when the temperature of a gas sample rises, the molecules accelerate, and so does the root mean square molecular speed. To determine a molecular speed, multiply three times the gas constant by the temperature, divide by the molar mass, and then square the result.
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If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be? nitrogen trifluoride = nitrogen + fluorine.
If the given word equation is rewritten as a balanced chemical equation, the coefficient for fluorine will be 3 and the symbol for fluorine will be F.
A balanced chemical equation is one in which the number of atoms of each element on the left side of the equation is equal to the number of atoms of each element on the right side of the equation. In the case of the given equation, the balanced chemical equation would be:
N2 + 3F2 → 2NF3
In this equation, the coefficient for fluorine (F2) would be 3 and the symbol for fluorine would be F. This means that there are three molecules of fluorine present in the reaction, and the symbol for fluorine is F.
In summary, if the given word equation is rewritten as a balanced chemical equation, the coefficient for fluorine will be 3 and the symbol for fluorine will be F.
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what number of moles of o2 is needed to produce 14.2 grams of p4o10 from p? (molecular weight p4o10
0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.
In order to calculate the number of moles of O2 needed to produce 14.2 grams of P4O10 from P, we need to use the equation for the reaction:
P + 5O2 → P4O10
We can calculate the number of moles of O2 needed by using the molar mass of P4O10, which is 284 g/mol. First, we need to calculate the number of moles of P4O10 present in 14.2 grams:
14.2 g/ 284 g/mol
= 0.05 mol.
Now, we can use the mole ratio between P and O2 to calculate the number of moles of O2 needed. The mole ratio is 5:1, meaning that for every 5 moles of O2, 1 mole of P is needed. Therefore, to get 0.05 moles of P4O10 from P, we need 0.05 x 5 = 0.25 moles of O2.
In conclusion, 0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.
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What are Scope 2 emissions examples?
Examples of scope 2 emission are, the electricity and natural gas that is purchased from the local power utility and energy consumption that purchased from the utility.
The Scope 2 emissions are the indirect emissions from the generation of purchased energy from a utility provider. All GHG emissions released in the atmosphere from the consumption of purchased electricity, steam, heat and cooling. For most organizations, electricity will be the unique source of scope 2 emissions. Scope 2 covers the electricity consumed by the end user. We can use the simple term “buy” for the scope 2 emission because the organization typically buys energy to run its operations. This emissions come from purchased electricity, steam, heating, or cooling.
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