If an alkane is having 5 carbon atoms then the hydrogen atoms in this alkane will be

Answer:

42195 meters

Answer:

26.2 miles = 42164.81

Explanation:

1 mile is 1609.34 meters so multiply that by 26.2 miles and you have your answer

An example of a pair of isotopes of the same element is Hydrogen and Deuterium. They are similar because they have same atomic number and they are different because they have different mass number.

Hydrogen is a chemical element with the atomic number 1. It is represented with symbol H. Mass number of hydrogen is 1. Hydrogen belong to group 1. It belongs to period 1. Hydrogen is s-block element.

Deuterium is isotope of hydrogen. The atomic of deuterium is 1. The mass number of deuterium is 2. It is also known as heavy hydrogen. It is represented as D or 2H.

Thus from the above conclusion we can say that a pair of isotopes of the same element is Hydrogen and Deuterium.

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The total pressure of the system would be 91.3 kPa.

To find the total pressure of the system, we need to add the partial pressure of hydrogen gas and the partial pressure of water vapor.

Partial pressure of hydrogen gas = total pressure - pressure of water vapor

Partial pressure of hydrogen gas = 91.3 kPa - 78.5 kPa

Partial pressure of hydrogen gas = 12.8 kPa

Therefore, the total pressure of the system is:

Total pressure = partial pressure of hydrogen gas + pressure of water vapor

Total pressure = 12.8 kPa + 78.5 kPa

Total pressure = 91.3 kPa

Therefore, the total pressure of the system is 91.3 kPa.

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The molar solubility of PbBr2 at 25°C is 1.0102 mol/L.

We need to calculate Ksp and express the answer using two significant figures.

Ksp (solubility product) is the product of the concentrations of the ions in a saturated solution of an ionic compound raised to the power of their respective stoichiometric coefficients.

The solubility product expression for PbBr2 is:

PbBr2(s) ⇌ Pb2+(aq) + 2Br−(aq)

The KSP expression is then given by:

Ksp = [Pb2+][Br−]^2

Let x be the molar solubility of PbBr2.

Therefore,[Pb2+] = x M[Br−]

= 2x M

Now substituting the values in the Ksp expression,

Ksp = x(2x)^2= 4x^3

Since the molar solubility of PbBr2 is given as 1.0×10−2 mol/L,

By substituting the value of x in the expression for Ksp, we get:

Ksp = 4(1.0×10−2)^3Ksp

= 4 × 1.0 × 10^−6Ksp

= 4.0 × 10^−6

Therefore, the solubility product (Ksp) of PbBr2 is 4.0  106.

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The use of water is to meet the daily needs of humans for drinking, eating, and cooking.

Water is a chemical substance with the formula H2O which is colorless, tasteless and odorless under standard conditions and is naturally found on the earth's surface.

Water is very important for humans, without water humans can die. Water has a role in the process of absorption and delivery of nutrients and oxygen to the body. Therefore, humans need to maintain water levels in the body so that the body does not experience digestive function disorders and food absorption.In addition, humans need water for cooking, bathing, washing. Water is also used for industrial, agricultural, animal husbandry, plantation, firefighting, recreation, restaurants, hotels, transportation, and various other purposes.

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The formation of Zinc sulfide from 'Zn' and 'S' is a redox reaction, because it involves both oxidation and reduction reactions. So zinc bonds with sulfur to form zinc sulfide.

The zinc sulfide also called the zincblende is a white or yellowish crystal and it is insoluble in water as well as denser than water. It is manufactured by the combustion of a mixture of zinc and sulfur.

The compound 'ZnS' decomposes in the presence of oxidizing agents and acids. The reaction is given as:

Zn + S → ZnS

The oxidation reaction is:

Zn - 2e⁻ → Zn²⁺

The reduction reaction is:

S + 2e⁻  → S⁻²

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Answer:

the answer is 47.9 and ik because I just had that question

The empirical formula of the compound is O₄Pb₃.

An Empirical system is the chemical system of a compound that offers the proportions of the elements gifted within the compound however not the real numbers or arrangement of atoms. This would be the lowest complete variety ratio of the elements within the compound.

Amount of lead (Pb) = 90.6%

⇒and amount of oxygen = 9.4%

taking the whole number ratio

o = 4

Pb = 3

∴ ⇒O: Pb=4:3

O4Pb3 answer.

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The element in period 2 with the smallest atomic radius is a noble gas. The atomic radius is the distance between the nucleus and the outermost electron shell of an atom.

As we move from left to right across period 2, the atomic radius decreases due to the increasing nuclear charge which attracts the electrons closer to the nucleus. However, the noble gases (helium, neon, argon, krypton, xenon, and radon) have completely filled valence shells and do not readily form chemical bonds with other elements. This results in a tightly packed electron cloud around the nucleus, leading to the smallest atomic radius in period 2. Alkali metals have a larger atomic radius than alkaline earth metals, while halogens have a larger atomic radius than the noble gases. In summary, the element in period 2 with the smallest atomic radius is a noble gas due to their completely filled valence shells and lack of chemical reactivity.

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The element in period 2 with the smallest atomic radius is a halogen.

The halogens are non-metallic and highly reactive elements. They are located to the right of the other nonmetals and to the left of the noble gases. Elements in the halogen group have seven electrons in their outer shells giving them many unique properties.

The halogens include the five elements fluorine, chlorine, bromine, iodine, and astatine.Ony chlorine and fluorine in the list are gaseous at room temperature.

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An unknown element has three naturally occurring isotopes total average atomic mass 20.18 amu and element from the periodic table is neon

Isotopes are the members of a family of an element that all have the same number of protons but different numbers of neutrons

There are three neon isotopes and the more abundant ²⁰Ne and ²¹Ne are both essentially all primordial, as there is no significant global production of these isotopes and also ²²N

Neon 20 is made up of ten proton and ten neutron the atomic mass unit of the gas is 19.992 and the abundance of the gas is 90.48% and neon 21 is made up of ten proton and eleven neutron and the atomic mass unit of the gas is 20.994 and the abundance is 0.27% and neon 22 is made up of ten proton and twelve neutron and the atomic mass unit of the gas is 21.991 and the abundance of gas is 9.25%

Unknown element from the periodic table is neon

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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Answer:

ELEMENTS

Explanation:

CUZ AN A

ELEMENT IS A GROUP OF ATOMS THAT CANNOT BE BROKEN DOWN BY ANY CHEMICAL OR PHYSICAL MEAN

Answer:

high rates of evaporation

Volume of water added is 1850 ml

What is solution?

The definition of a solution specifically relates to a certain class of homogeneous mixture, that is, a mixture with a uniform composition and no discernible differences between its constituent parts. This is distinct from a heterogeneous mixture, where each component can be seen separately.

The term "solutions" typically refers to mixtures of liquids, although it can also apply to combinations of gases or solids.  The solvent, which often comprises a larger portion of the combination because it is the medium in which other chemicals will dissolve.

Mass of sodium citrate present in 100 ml of 1.95% (w/v = 1.95g

Volume of solution = Mass of sodium citrate/(w/v)x100

                                 1950 ml

Total volume of the solution = 1950ml

Volume of water added = 1950-100

                                         1850 ml

Therefore , Volume of water added is 1850 ml.

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Answer:C

Explanation: Done by reading and is best answer option.

A substance has 0. 0152088 moles per 10 grammes. One can use the equation grams = weight / molar mass to determine this. The volume of one mole of a chemical is represented by its molar mass on the chemical elements.

You would take its weight (10g) and multiply it by the material's molar mass to determine the number of molecules within 10g of a substance. For instance, if the material is water, its molar mass is 18. 015 g/mol, meaning that 10 g is comparable to 0. 555 molecules of water.

However, the formula moles = mass / molar weight can be used to determine the number of moles in an unit weight regardless of the substance. Therefore, there are 0. 0152088 mole in 10

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Answer:

Protons and Neutrons are large particles and are densely compacted into the nucleus of the atom. Protons are electrochemically positive in charge and the Neutrons are electrochemically neutral in charge. ... Electrons are electrochemically negatively charged particles that move random around the nucleus

Explanation:

Protons are positively charged, neutrons are neutral and they both are located in the nucleus whereas electrons are negatively charged and located outside the nucleus.

Explanation:

So from this, we conclude that the protons are positively charged, neutrons are neutral and they both are located in the nucleus whereas electrons are negatively charged and located outside the nucleus

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The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Answer:

hope this helps

Explanation:

1M NaCl solution is 58.5 g/1000 ml , where molecular wt of NaCl being 58.5 grams , so 29.2 g of NaCl in 1000 ml of water will be equal to : 29.2g /58.5g = 0.499145299 M , so 29.2 g NaCl dissolved in 100 ml would correspond to , 0.499145299 M X 1000 ml/100 ml = 4.99145 M or about 4.99 M

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:

Element- Aluminum

Element - Mercury

Compound - Ferrous Sulfate

Compound - Sucrose

Element - Carbon​

Explanation:

Element: an element is a pure substance which is composed of only one type of atoms and that cannot be split or broken down into any simpler pure substance.

Examples of elements include:

Aluminum - it is composed of only atoms of aluminium. Each atom has 13 protons

Mercury - it is composed of only atoms of mercury. Each atom has 80 protons

Carbon - it is composed of only atoms of carbon. Each atom has 6 protons

Compound: a compound is a pure substance that is composed of two or more types of atoms (elements) in a fixed and definite proportion and that cannot be split into component elements by simple physical methods but only by chemical methods. Examples of compound include:

Ferrous sulphate: It is composed of atoms of Iron, Sulfur and Oxygen

Sucrose: It is composed of atoms of Carbon, Hydrogen and Oxygen.

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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The unknown metal X is iron metal as it reacts with copper sulfate solution but does not react with magnesium chloride.

Some metals are very reactive while other metals are less reactive or unreactive. When a more reactive metal is added to the solution of a less reactive metal, then the more reactive displaces the less reactive metal from its solution is known as a displacement reaction.

The general form of a single displacement reaction can be represented as:

\(A + BC \longrightarrow B + AC\)

When iron is placed in copper sulfate (CuSO₄) solution then the blue color of the copper sulfate solution turns a red-brown coating of copper metal deposited on the iron.

\(CuSO_4 (aq)+ Fe (s)\longrightarrow FeSO_4 (aq) +Cu(s)\)

Iron lies above the electrochemical series and is more reactive than copper. So it reacts with copper sulfate but does not give any reaction with magnesium chloride.

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Mathematics and science are formal and exact sciences that are based on logic.

Mathematics is an exact science that studies the properties and relationships between entities through geometric figures and arithmetic with numbers. Mathematics then looks for common patterns that could end up leading to a theory and, if it is verifiable and true, end up being a law, such as the Pythagorean law for example.

In terms of science, it is the comparable knowledge that has been studied, explained, and has helped predict social and natural phenomena in our universe over time. This has been done and verified through the scientific method, making it then a verifiable and true logic.

Therefore, we can confirm that mathematics and science are formal and exact sciences that are based on logic.

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Answer:

the answer is D =decreasing the temperature ️️️

Answer: Stamen, the male reproductive part of a flower. In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther consists of four saclike structures (microsporangia) that produce pollen for pollination. The main flower parts are the male part called the stamen and the female part called the pistil. The stamen has two parts: anthers and filaments. The anthers carry the pollen. The four main parts of a flower are the petals, sepals, stamen, and carpel (sometimes known as a pistil). If a flower has all four of these key parts, it is considered to be a complete flower.

Explanation:

Answer:

36.82 is 37 when you round it

Explanation:

:)

In general, when the temperature rises, a solute becomes more soluble in a particular solvent.

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The bonding in HNNH is Sp² orbitals on each nitrogen overlap and form a sigma bond

To verify the accuracy of any chemical structure, we use the octet rule, which states that all atoms in a compound are expected to abide by. In the model of carbon IV oxide, every atom precisely satisfies the octet rule. Each atom in the molecule has eight electrons surrounding its valence shell. Given the total number of bonds and electrons, as well as the fact that CO2 has sixteen valence electrons, we can therefore conclude that this structure is correct.

It has a negative charge that is comparable to its negative charge, which is 1.602176634 coulombs, the fundamental unit of electric charge. Only 1/1,836 the mass of a proton, or 9.1093837015 10-31 kg, makes up the rest mass of an electron.

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Given: Volume of solution, V = 10 mLConcentration of solution, C = 0.5 mol/L.

With this, we can convert the volume from mL to L by dividing it by 1000. Therefore,V = 10 mL = 10/1000 L = 0.01L. Now, we can use the formula: n = C x V where,n = number of moles C = concentration of solutionV = volume of solution. Plugging in the values, we get,n = 0.5 mol/L x 0.01 L= 0.005 mol. In chemistry, mole is defined as a unit for measuring amount of substance. The symbol used for mole is 'mol'. This unit helps to express the number of particles in a sample of substance. For instance, one mole of a substance contains 6.022 x 10²³ particles of that substance.A solution is a homogeneous mixture of two or more substances. The concentration of a solution refers to the amount of solute present per unit volume of the solution. It is usually expressed in moles per litre (mol/L) or molarity.

Molarity is defined as the number of moles of solute present in one litre of solution. It is given by the formula:M = n/Vwhere,M = molarity of the solutionn = number of moles of solute presentV = volume of the solution in litresIn the given question, we are given the volume of solution and its concentration. Therefore, we can use the formula:M = n/Vto find the number of moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L. There are 0.005 moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L.

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