The element that has the greatest tendency to undergo oxidation is Francium.
When an element is reduced, it becomes an oxidizing agent because it receives electrons, whereas when an element is oxidized, it loses electrons. Electrons are easily lost (or donated) by strong reducing agents. Better reductants typically have atomic radii that are relatively large. In such species, the valence electrons are not strongly attracted to the nucleus because of the great distance between them.
The greatest chemical reducer should be francium, which has one outside electron in the 7s orbital. Alkali metal francium quickly donates an electron. As a result, it might be regarded as a reducing agent.
Thus, Francium has the greatest tendency to undergo oxidation.
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5. Write About It Write a letter that Thomson
might have sent to another scientist
explaining why an atom must contain positive
charges as well as negative charges. The letter
should also explain why Thomson proposed
the atomic model that he did.
The way to write a letter that Thomson might have sent to another scientist explaining why an atom must contain positive charges as well as negative charges is given below
First, include your name and contact details.Specify the date.Include the name and contact details of the receiver.Create an AMS style topic line and a block-style salutation.The letter's body should be written.Include a closing statement.Check your letter for errors.Describe the formal letter?A formal letter is written for official purposes, such as to express concerns while working in a professional setting, to share official information at your workplace, to place an order for goods, to apply for a job, to the Editor of a newspaper addressing the issues faced by various groups of people in various areas, etc.
Therefore, since the letter above is not to someone that is a close friend or family, it will be a formal letter. formal letter must have the recipient's address, the sender's address, the date, the salutation, the body of the letter, a complimenting close, and the signature with the recipient's name (in block letters) and designation.
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How do you convert temperature formula?
Formulas for temperature conversion involve converting temperature values between different units. Numerous techniques exist for converting temperatures. These include Kelvin, Celsius.
Such techniques are the ones that are most frequently used. The concept of temperature is used to convey quantitatively how hot and cold something is. Using a thermometer, one can gauge temperature. Thermometers are calibrated using different temperature scales that traditionally relied on different reference points and thermometric materials for definition. The Celsius scale, one of two temperature scales used in the International System of Units (SI), along with the Kelvin scale, uses degrees Celsius as its unit of measurement. The Celsius scale was first known as the centigrade scale outside of Sweden.
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See picture please help
The molar concentration of the initial calcium chloride solution is 0.252M.
How to calculate molar concentration?Molar concentration or molarity refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
According to this question, the EDTA binds calcium ions in a titration procedure in a 1:1 ratio. If the titration was begun with 247mL of calcium chloride, the molar concentration used initially can be calculated as follows:
CaVa = CbVb
Where;
Ca = initial concentrationCb = final concentrationVa = initial volumeVb = final volumeCa × 247 = 1.69 × 36.8
247Ca = 62.192
Ca = 62.192 ÷ 247
Ca = 0.252M
Therefore, 0.252M is the molar concentration of the calcium chloride solution.
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Why do metals tend to lose electrons to form positive ions?
A. The positive ions that are formed when metals lose electrons are more reactive than the neutral metals.
B. They hold on tightly to electrons.
C. They conduct electricity, which makes them lose their electrons.
D. A metal atom loses its few valence electrons to form a full octet.
How does the generator work? Select the statement that describes that.
It turns electrical energy into KE.
This is the correct statement of how a generator works:
What is generator?A generator is described as a device that converts motive power or fuel-based power into electric power for use in an external circuit.
Generators contrary to general opinion do not create electricity instead it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit. This flow of electrons makes up the output electric current supplied by the generator.
The present-day generators work on the principle of electromagnetic induction that was discovered by Michael Faraday.
Faraday realized that the above flow of current can be created by moving an electrical conductor in a magnetic field and this movement creates a voltage difference between the two ends of the conductor which causes the electric charges to flow, hence generating electric current.
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Complete question:
How does the generator work? Select the statement that describes that.
______It turns electrical energy into KE.
_____ It turns sound energy into electrical energy.
_____ It turns electrical energy into sound energy.
_____ It turns electrical energy into thermal energy.
_____ It turns KE into electrical energy.
Why does reactivity decrease as you move from left to right on the periodic table?
Higher reactivity is caused by the ease with which electrons can be given or taken away as you move further to the left and down the periodic chart.
How quickly a substance performs a chemical reaction is measured by its reactivity. A release of energy is typically present during the reaction, which might involve the chemical alone or in combination with other atoms or molecules. Chemistry's notion of reactivity is not entirely clear. In other words, whether a substance reacts at all and how quickly it reacts, it seems to incorporate both thermodynamic and kinetic aspects. Both factors which are distinct in reality are frequently temperature-dependent.
A subatomic particle called an electron has an electric charge that is one element's negative opposite. A negatively charged, subatomic particle known as an electron can be either attached to or liberated from an atom. There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom.
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What is vehicle give two examples?
Vehicles are modes of transportation that are used to travel from one place to another. Examples of vehicles include cars, buses, motorcycles, boats, and airplanes.
Cars are the most common type of vehicle, and they are used for everyday transportation. They typically have four wheels and an internal combustion engine that runs on gasoline or diesel fuel.
Buses are a type of vehicle that is used for public transportation. They are usually larger than cars and have more seating capacity.
Motorcycles are a type of vehicle that is designed for one or two people and has two wheels. They are powered by an internal combustion engine and are typically smaller than cars.
Boats are a type of vehicle that is used for traveling on water. They are powered by an engine or by sails and are typically used for recreation or transportation. Airplanes are a type of vehicle that is used for long-distance transportation. They are powered by jet engines and are capable of reaching high speeds and altitudes.
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What number of moles will be produced from 11.2dm3 of NH3 at s. T. O
Answer:
[tex]\huge\boxed{\sf n = 0.5 \ mol}[/tex]
Explanation:
Given Data:Volume = v = 11.2 dm³
Molar Volume = V = 22.4 dm³/mol
Required:Moles = n = ?
Formula:[tex]\displaystyle n = \frac{v}{V}[/tex]
Solution:[tex]\displaystyle n = \frac{11.2}{22.4} \\\\n = 0.5 \ mol\\\\\rule[225]{225}{2}[/tex]
If my independent variable is temperature of butter, how can I specify my dependent variable to be more specific? My dependent variable is texture of cookies.
Answer: The hot dissolved butter will form softer cookies.
Explanation:
What are the 7 steps of the naturalization process?
Naturalization is the process by which a non-citizen of a country can acquire citizenship. It usually involves a process of paperwork, interviews, and tests to demonstrate knowledge of the country’s language, culture, and history. it involves 7steps.
1. File Form N-400: This is the first step in the naturalization process. The Form N-400 is an application for naturalization and must be filed with U.S. Citizenship and Immigration Services (USCIS). The form must be filled out completely and accurately, and it is important to include all necessary documents, such as a copy of your green card, birth certificate and other documents that prove your eligibility for naturalization.
2. Fingerprint Appointment: Once the Form N-400 is submitted, the USCIS will contact the applicant to schedule a fingerprint appointment. The fingerprints are used to conduct a background check to verify the applicant’s identity and to determine if they have any criminal history.
3. Interview Appointment: After the fingerprint appointment, the USCIS will contact the applicant to schedule an interview at a local USCIS office. During the interview, the applicant will be asked questions about their application and basic civics questions. The applicant must correctly answer at least six out of ten questions to pass the interview.
4. English and Civics Tests: In addition to the interview, the applicant must also take an English and civics test. The English test assesses the applicant’s ability to read, write, and speak English. The civics test assesses the applicant’s knowledge of U.S. history and government.
5. Oath of Allegiance: If the applicant passes the interview and tests, they will be scheduled for a naturalization ceremony. At this ceremony, the applicant will take the Oath of Allegiance to the United States. Once the oath is taken, the applicant is officially a U.S. citizen.
6. Certificate of Naturalization: After the ceremony, the applicant will receive their Certificate of Naturalization. This document serves as proof of the applicant’s U.S. citizenship.
7. Passport Application: Finally, the applicant must submit a passport application to the U.S. Department of State to receive their U.S. passport. This passport will serve as proof of their citizenship and allow them to travel abroad.
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A sample of gas contains 0.1500 mol of N2(g) and 0.3000 mol of H2(g) and occupies a volume of 16.2 L. The following reaction takes place:
N2(g) + 2H2(g)N2H4(g)
Calculate the volume of the sample after the reaction takes place, assuming that the temperature and the pressure remain constant.
The volume of the sample after the reaction takes place at constant temperature and pressure would be 5.4 L.
Volume of gases at constant temperature and pressureIn the reaction: [tex]N_2(g) + 2H_2(g)-- > N_2H_4(g)[/tex]
Stoichiometrically, 1 mole of [tex]N_2[/tex] reacts with 2 moles of [tex]H_2[/tex] to produce 1 mole of [tex]N_2H_4[/tex].
In reality, 0.1500 mol of [tex]N_2[/tex] reacts with 0.3000 mol of [tex]H_2[/tex]. The equivalent amount of [tex]N_2H_4[/tex] that would be formed will be 0.1500 mol according to the mole ratios from the balanced equation of the reaction.
Now, at constant temperature and pressure:
0.1500 + 0.3000 = 0.4500 mol
0.4500 mol is equivalent to 16.2 L according to the illustration.
0.1500 mol of [tex]N_2H_4[/tex] is produced, the equivalent mole would, therefore, be:
0.4500 mol = 16.2 L
0.1500 mol = 16.2 x 0.1500/0.4500
= 5.4 L
In other words, the volume of the sample after the reaction takes place at constant temperature and pressure would be 5.4 L.
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What are cinder cone volcanoes made up of?
Cinder cones are made up of layers of pebble-sized or larger cinders and layers of ash. Larger volcanic bombs and blocks may also be present.
cinder cone, also called ash cone, deposit around a volcanic vent, formed by pyroclastic rock fragments (formed by volcanic or igneous action), or cinders, which accumulate and gradually build a conical hill with a bowl-shaped crater at the top. Cinder cones develop from explosive eruptions of mafic (heavy, dark ferromagnesian) and intermediate lavas and are often found along the flanks of shield volcanoes. The outside of the cone is often inclined at about 30°, the angle of repose (the slope at which the loose cinder can stand in equilibrium). Cinder cones may be only a few tens of feet high, or they may grow to a height of several hundred meters (several thousand feet), like that of Paricutín in Mexico. Lava flows may break out of or breach the cone, or they may flow from under the cone through tunnels. Cinder cones are numerous in nearly all volcanic districts. Although they are composed of loose or only moderately consolidated cinder, many of them are surprisingly enduring features of the landscape because rain falling on them sinks into the highly permeable cinder instead of running off down their slopes to erode them.
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Does iodine and oxygen form an ionic compound?
Both oxygen and iodine are non-metals. Neither contributes electrons to achieve octet stability. Instead of forming an ionic bond, these two electrons are shared to form a covalent bond.
If these two compounds react to form a compound, that compound is considered an ionic compound. The ionic form of rubidium is Rb+, while the ionic form of sulfur is S2-. Sodium reacts with oxygen to form ionic compounds.
On the other hand, sodium chloride contains ions. It is an ionic compound. Ionic compounds contain ions that are held together by attractive forces between oppositely charged ions. Table salt is one of the best-known ionic compounds. Rubidium is a positive element. It actively donates its single valence electron to form a positively charged cation.
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Is 0.9 and 0.90 the same?
Answer:
0.9 and 0.90 are not the same because 0.9 is not up to zero but 0.90 is up to zero
what are neutral atoms on the periodic table
Neutral atom generally means to atoms which don't react with any other atoms or elements.
If an atom has an equal number of electrons and protons, then it also has an equal number of negative (the electrons) and positive electric charges (the protons). As a result, the total electric charge of the atom is zero, and the atom is said to be neutral. Thus, all the elements in the periodic table are neutral atoms.
Example of neutral atom
For example a neutral sodium atom which contains 11 protons and 11 electrons. And after removing an electron from this atom we get a positively charged Na⁺ ion that has a net charge of +1. Atoms become negatively charged when it gains extra electrons.
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which element in the list is the most reactive
Francium is most reactive element in periodic table.
Properties of elements within a period vary in a predictable way from one side of the periodic table to the other. In the periodic table, each period is represented by a horizontal row. Every atom in a line has the same number of electron shells. Elements become less metallic as a result of gaining electrons and protons as they move through a period. - The number of electron shells is the same for elements in the same period.
This arrangement reflects the fact that similar features recur frequently as the atomic number increases. The characteristics of elements within a blank shift in a predictable way from one side of the periodic table to the other. Those that meet certain criteria are displayed in a column.
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What is the bond between phosphorus and chlorine?
Phosphorus and chlorine form bond is covalent bond.
A covalent bond is likely to form if the difference in electronegativity between the elements is less than 1.7.
For instance, the electronegativity of phosphorus (P) is 2.1 and that of chlorine (Cl) is 3.0.
These two numbers are differentiated by 0.9. Since 0.9 is lesser than 1.7, phosphorus and chlorine form a covalent bond.
Chlorine and phosphorus are both found on the right side of the periodic table, which is where nonmetals are. As a result, a covalent bond will be formed between the two nonmetals.
So, we can say that covalent bond is between phosphorus and chlorine.
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I NEED THE ANSWER FOR PRODUCT !!! (ALREADY DID THE OTHERS)
Answer:
yes
Explanation:
yes
what is lithification
lithification is a complex process where sediments are compact under pressure, expel connate fluids and converted into solid rock.
What are Rock?A rock is the collection of solid (grains) mineral materials that grow or become cemented together. it can be a natural substance composed of solid crystals of different minerals that have been blend together into a solid lump.
Types of Rocks?The major types of rocks are:
Igneous rocks: also known as fire ( Latin ) are form when hot, molten rock (magma) crystallizes and solidifies. The melt substance originates deep within the Earth.sedimentary: sedimentary rocks are generally formed from pre-existing rocks or remains of once-living organisms. They are also form from deposits that accumulate on the Earth's surface. It is observed that sedimentary rocks often have distinctive layering or bedding.metamorphic: this type of rock is also referred as changed rocks, it occurs when solid rock changes in composition and/or texture without the mineral crystals melting. The changes is as a result of the subject to high heat, high pressure, hot mineral-rich fluids.learn more about Rocks here:
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As the density of a substance decreases, the volume of a given mass of that
substance _________.
A. increases
B. is not affected
C. decreases
Calculate the pH of a solution that has a hydronium ion concentration, [H3O+], of 4.75×10−8 M.
pH= ?
Answer:
pH=7.32
Explanation:
pH is a mathematical expression that represents -log base 10 of the hydronium concentration:
[tex]pH=-\log[H_3O]\\pH=-log(4.75x10^-8)\\pH=7.32[/tex]
What two elements are malleable?
any substance that is present at the start of chemical reaction
Any substance that is a gift at the beginning of a chemical reaction a reactant
“A substance is a matter which has a specific composition and unique homes. ” every pure detail or pure compound is a substance. A substance can't be separated by way of any physical technique. The homes/composition of a natural substance is fixed.A substance is be counted which has a particular composition and unique houses. every pure element is a substance. each pure compound is a substance. Examples of materials: Iron is an element and as a result is also a substance.
A chemical substance is a shape of matter having a steady chemical composition and function homes. some references add that chemical substances can't be separated into their constituent factors with the aid of bodily separation techniques, i.e., without breaking chemical bonds.
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At 45.0 °C, a 14.00 L vessel is filled with 6.14 atm of Gas A and 5.89 atm of Gas B. What is the mole fraction of Gas B?
The partial pressure A is 6.14 and that of of B is 5.89 atm Thus the mole fraction of B is 0.49.
What is mole fraction?Mole fraction of a component in a mixture is the ratio of its number of moles to the sum of number of moles all the components in the mixture.
The mole fraction of a gas if their partial pressures are given is the ratio of its partial pressure to the total pressure of the mixture. Here the partial pressure of A is 6.14 and that of B is 5.89 atm.
The mole fraction of B = Pb/ (Pa + Pb)
= 5.89 atm / (6.14 + 5.89 atm)
= 0.49
Therefore the mole fraction of gas B in the mixture is 0.49.
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A sample of krypton gas at a pressure of 1.10 atm and a temperature of 22.6 °C, occupies a volume of 694 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.765 atm, the volume of the gas sample will be
mL.
Considering the Boyle's law, the volume of the gas sample will be 997.908 mL.
Boyle's lawBoyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.
Mathematically, this law expresses that if the amount of gas and the temperature remain constant, the product of the pressure by the volume always has the same value:
P×V= k
where P is the pressure, V is the volume, and k is a constant.
Analyzing an initial state 1 and a final state 2, it is fulfilled:
P₁×V₁= P₂×V₂
New volume in this caseIn this case, you know:
P₁= 1.10 atm
V₁= 694 mL
P₂= 0.765 atm
V₂= ?
Replacing in Boyle's law:
1.10 atm× 694 mL= 0.765 atm×V₂
(1.10 atm× 694 mL)÷ 0.765 atm= V₂
997.908 mL= V₂
Finally, the new volume will be 997.908 mL.
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1) A potassium carbonate hydrate has a formula K2CO3.XH2O. 10g of the hydrate leave 7.83g of anhydrous salt upon heating. Deduce the formula of the hydrate.
2) Samples of carbon of masses 3.62g , 5.91g , and 7.07g undergo combustion in excess air. The masses of carbon dioxide (the unique product of the combustion in each case) obtained are respectively 13.26g, 21.66g, and 25.91g. Does carbon dioxide have a fixed composition? Determine it!
The formula of the hydrated potassium carbonate salt is K₂CO₃.2H₂O
Based on the calculated mass ratio of carbon and oxygen in carbon dioxide, carbon has a fixed composition.
What are hydrated compounds?Hydrated compounds are compounds that contain one or more molecules of water physically combined with a molecule of the compound.
The formula of the hydrated potassium carbonate salt is determined as follows:
Mass of the hydrated sample = 10.0 g
Mass of anhydrous salt = 7.83
mass of water = 10 - 7.83
mass of water = 2.17 g
Molar mass of water = 18.0 g
Molar mass of anhydrous potassium carbonate = 138 g
moles of anhydrous potassium carbonate in sample = 7.83/138
moles of anhydrous potassium carbonate = 0.056 moles
moles of water in the hydrated salt = 2.17/18
moles of water in the hydrated salt = 0.12
Mole ratio of water to anhydrous salt = 0.12/0.056
Mole ratio of water to anhydrous salt = 1 : 2
Formula of hydrated salt = K₂CO₃.2H₂O
The mass ratio of carbon to oxygen in the compounds is given below:
Sample 1:
Mass ratio = 3.62 / (13.26 - 3.62)
Mass ratio = 0.38 : 1
Sample 2:
Mass ratio = 5.91 / (21.66 - 5.91)
Mass ratio = 0.38 : 1
Sample 3:
Mass ratio = 7.07 / (25.91 - 7.07)
Mass ratio = 0.38 : 1
Carbon has a fixed composition.
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What group reacts with chlorine in a 1/2 ratio?
Answer:sulphur reacts with chlorine in 1:2
Explanation:hope this helps :)
what is water clarity
While turbid waterways are characterized by large levels of suspended particles that obscure visibility by absorbing and reflecting light, clear waters are low quantities of suspended soil particles and/or algae.
How is water clarity impacted?Water clarity can be impacted by a variety of factors, including suspended particles, algae growth, runoff, shoreline erosion, wind mixing of the lake bottom, and tannic and humic acids from wetlands.
Why is water clarity so poor?Water clarity problems are mostly caused by nutrient and sediment pollution. Excess nutrients can encourage the growth of algae that obscure the water when they enter surrounding streams. Similar to how silt can become suspended in the water when soil erodes and flows into rivers, streams, and the Bay.
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Is CO2 polar or nonpolar covalent bond?
Due to its symmetry and the fact that the pull of the two oxygen atoms on the electrons of carbon cancel each other out, carbon dioxide is a nonpolar molecule with polar bonds. Because the vector sum of the dipole moments of the two CO bonds is zero, the CO2 molecule is non-polar even if the CO bond in it is polar.
With carbon, each oxygen atom forms a double bond. Different electronegativities of carbon (C) and oxygen (O) result in unequal distribution of electrons between them. Due to the cancellation of the two bond dipole moments, there is no net molecule dipole moment. Carbon dioxide is a non-polar gas as a result.
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2 Fe(OH)3 →
Fe2O3 + 3H₂O
100 p
If you have 7.2 moles of Iron(III) Hydroxide how many moles of water will be produced?
6 moles of water will be produced. after analyzing the stoichiometry of the equation, where the number of water molecules is divided by the molecular mass of water which is 18 grams.
What are Moles?
Standard scientific unit for calculating the number of atoms, molecules, or other specific particles in vast amounts. The mole designates 6.02214076 × [tex]10^{23}[/tex] units, which is a very large number.
What is Stoichiometry?
To calculate the appropriate quantitative data, a chemistry concept known as stoichiometry uses relationships between the reactants and/or products of a chemical reaction. Understanding the relationships that exist between products and reactants and why they exist, which necessitates understanding how to balance reactions, is crucial before using stoichiometry to perform calculations regarding chemical reactions.
6 moles of water will be produced.
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