represent each of the following as a number between 0.1 and 1000 using an appropriate prefix: (a) 45 320 kn, (b) 568(105) mm, and (c) 0.00563 mg.

Plants can be defined as multicellular organisms that has the ability to manufacture or produce their own food.

The multicellular organisms are those organisms that are made up of various cells which work together to maintain the functionality of the living organism.

The plant can be described as a multicellular organism as it contains cells such as:

The plants are also has the ability to manufacture their own food due to the presence of the green pigment called the chloroplast.

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Answer:

70/100 X 2000 = 1400 tonnes of iron.

Explanation:

take the percentage of iron oxide and divide with overall amount of iron oxide using 2000 tonnes of hematite ore. 1400 tonnes of iron will be produced. this is not the percentage. if you want the percentage of iron produced just divide.

70/100 x 200 = 1400 tonnes of iron

percentage of iron produced = 70/1400 x 100 = 5 % of iron produced from 70% of iron oxide in 2000 tones of hematite ore

Answer:

Exothermic reaction is a reaction in which heat is evolved.

Ex-Salt water

Answer:

\(\huge\red{happy}&nbsp\green{birthday}&nbsp\pink{dear}&nbsp\orange{lakshu}\)

Answer:

monkey

Explanation:

cause that's what u r

Answer:   Y  21.38 % , Al  32.44 % and O 46.16 %

Explanation: Molar mass of YAl5O12 is 88.91 + 5·26.98+12·16

= 415.81 g/mol

  m-% ( Y) = 88.91 / 415.81 = 21.38 % ,     m-% (Al) = 5·26.98 / 415.81 =

  32.44 %  , rest is Oxygen

Answer:

A. Barium

Explanation:

hope this helps! :)

Answer:

force i think

Explanation:

Nitrogen in a rigid 5 m³ tank at 120 K and 1 MPa is in a compressed and cooled state.

The nitrogen in the tank is in a compressed and cooled state. This means that the nitrogen gas has been subjected to pressure and has been cooled to a temperature of 120 K.

When a gas is compressed, its particles are forced closer together, resulting in an increase in pressure. In this case, the nitrogen gas has been compressed to a pressure of 1 MPa, which is equivalent to 10 times atmospheric pressure. This high pressure allows a larger amount of gas to be stored within the given volume of the tank.

Additionally, the nitrogen gas has been cooled to a temperature of 120 K. At lower temperatures, the kinetic energy of the gas particles decreases, causing them to move slower and exert less pressure. Cooling the gas helps to reduce its volume and increase its density, allowing more gas to be stored within the confined space of the tank.

Overall, the combination of compression and cooling enables the storage of a larger quantity of nitrogen in the given volume of the tank. This is particularly useful in various industrial applications where a large supply of nitrogen is required, such as in the food and beverage industry for preservation or in the electronics industry for inert atmospheres during manufacturing processes.

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There is only one sodium ion for every chlorine ion due to its valency.

The number of electrons that an atom needs to lose or gain in order to achieve a stable electron configuration i.e the octet of an element is known as the valency of an element, which serves as a gauge of that element's potential for combining.

The valency of Sodium (Na) is 1 and that of chlorine (Cl) is also one. therefore they combine to form a stable compound. The same rule follows in the compound formed by Potassium (K) and Oxygen(O) also. The valency of oxygen is 2 which means that it should be surrounded by 2 potassium ions to provide electrons to fulfill both the elements' octets.

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Answer:

3.5%

Explanation:

To find the percentage that $13.13 represents of $375.00, we can use the following formula:

Percentage = (Part / Whole) x 100%

where "Part" is the amount we're trying to find the percentage of (in this case, $13.13), "Whole" is the total amount ($375.00), and we multiply the result by 100% to convert it to a percentage.

So, we have:

Percentage = ($13.13 / $375.00) x 100%

Percentage = 0.035 x 100%

Percentage = 3.5%

Therefore, $13.13 is approximately 3.5% of $375.00.

Answer:

856.0548362529

Explanation:

Answer:

Explanation:

1. The element you selected is Sodium. some of the physical properties are

i. Sodium has a strong metallic lustre

ii. Sodium are usually silver white in color

iii. Sodium is soft it can be cut with knife

iv. Sodium are malleable and ductile.

v.  Sodium conduct electricity

Sodium belong to group 1 elements which are called Alkali metals. Sodium have one valency electron and it gives this electron easily during bonding . This is one reason sodium and other alkali metals are very reactive. Sodium can instantly be oxidized by water.  Sodium has a relative atomic mass of approximately 23 amu.

2. There are various models that describe atoms .This models includes John Dalton models, J.J Thompson model, Ernest Rutherford model, Bohr's models etc. This models made us understand the role and location of each sub atomic particles. The models shed more light on subatomic particles like electron which revolve around the nucleus.  It provide more information on what contribute to the weight of an atom.

3. The proton , neutron and electron are subatomic particles of an atom. The proton and the neutron are located at the nucleus of an atom.  The proton and neutron contributes majorly to the weight of an atom. The proton is positively charge while neutron has no charge.

Electron is found to move around the nucleus in cloud. The electron is negatively charge. The electron determines bonding of atoms. An atom is electrically neutral if the number of proton is equal to the number of electron.

4. The four fundamental forces includes weak nuclear forces , strong nuclear forces , gravity and electromagnetic forces.

Weak nuclear forces is responsible for particle decay .Nuclear forces don't play a role in chemical reaction . If they are involve in a reaction it becomes nuclear reaction not chemical reaction.

Strong nuclear forces causes a strong nuclear interaction and it is the strongest among the 4 fundamental forces. This strong force only operate when subatomic particles are much closer to each other.

Gravity force is too weak to affect chemical reaction much. The gravity forces involves the interaction between two objects with energy and mass.

The electromagnetic force act between charged particles like negatively charged electron and positively charged proton. Electromagnetic force is the most important force in chemical bonding as it depends on the arrangement of atoms and the state of their electron. Electromagnetic forces exist in various forms like the covalent bond, metallic, ionic , dipole dipole, hydrogen bonds and many more. The major force involve in chemical bonding is the electromagnetic force.

Answer:

none of the above

Explanation:

Answer:

1

Explanation:

Because it only separated while everything else turned into different materials.

they get closer together

answer:

millions of animals..

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The heat required to raise the temperature of 8.75 g of water from its melting point to its boiling points is 3.662 kJ.

The amount of heat required to increase the temperature of one gram of a material by one degree Celsius (°C) is defined as specific heat.

The equation q = mcΔt can be used to compute the amount of heat acquired or lost by a specific heat (q), where m is the mass of the sample, c is the specific heat, and Δt is the temperature change.

Given:

m = 8.75

c = 4.186 J/g°C

The melting point and boiling point of water is 0° and 100° respectively.

Δt = 100° - 0° = 100°

We know that,

q = mcΔt

  = 8.75(4.186)100

  = 3.662 kJ

Thus, the heat required to raise the temperature of 8.75 g of water from its melting point to its boiling points is 3.662 kJ.

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False

complete combustion produces carbon dioxide + water

Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Stability is the reason that causes atoms  to bond together to form molecules.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. In the nucleus, proton and neutron are present.

Every atoms want to gain stability. To gain stability atoms have to gain noble gas configuration that is outermost shell must contain 2,8, 18 electrons. The atom should follow octet rule. Stability lowers the energy of an atom.

Therefore stability is the reason that causes atoms  to bond together to form molecules.

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Compound B is expected to be converted into an epoxide more rapidly upon treatment with NaOH because the nucleophile and leaving group are both in the more stable equatorial position.

In order to form an epoxide, a nucleophile must attack the carbocation intermediate from the backside, which requires both an axial nucleophile and an axial leaving group. In this case, neither compound has both groups axial, so the reaction will be slower.

However, compound B has both the nucleophile and the leaving group in the more stable equatorial position, which will make the reaction faster than with compound A. The hydrogen bonding between the axial alcohol and the tert-butyl group in compound A will not significantly affect the reaction rate.

Additionally, while an equatorial leaving group may leave more readily to form a carbocation, it is not as important in this particular reaction as the requirement for backside attack. Therefore, the correct answer is that compound B reacts more rapidly because the nucleophile and leaving group are both in the more stable equatorial position.

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Water molecules are cohesive due to the hydrogen bonding that occurs between them. The hydrogen bonding occurs between the hydrogen atoms of one water molecule and the oxygen atom of another water molecule.

These bonds are not very strong but they are strong enough to hold water molecules together. The hydrogen bond is an attractive force between a partially positively charged hydrogen atom and a partially negatively charged atom of a different molecule or within the same molecule (e.g. water).The hydrogen bonds between water molecules contribute significantly to the high surface tension of water.

Water also has a high specific heat capacity and a high heat of vaporization due to hydrogen bonding. Hydrogen bonding between water molecules also contributes to the fact that water has a high boiling and melting point. The cohesiveness of water molecules also contributes to capillary action.

This hydrogen bonding contributes to many of the unique properties of water, including its high surface tension, specific heat capacity, heat of vaporization, boiling and melting point, and capillary action.

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In a crucible, a sample of pure iron is covered with an excessive amount of sulfuric acid powder. The extra sulphur was heated off by heating the mixture to a temperature wherein a reaction took place.

To calculate the mass of iron and sulfur in the compound, we need to consider the changes in mass during the reaction.

First, we determine the mass of iron by subtracting the mass of the crucible and lid (19.746 g) from the mass of iron, crucible, and lid (20.422 g).

This gives us 0.676 g of iron.

Next, we calculate the mass of sulfur by subtracting the mass of the compound, crucible, and lid (21.195 g) from the mass of the crucible and lid (19.746 g).

This gives us 1.449 g of sulfur.

To determine the moles of iron and sulfur, we need to divide their masses by their respective molar masses.

The molar mass of iron is 55.845 g/mol, so the moles of iron can be calculated by dividing 0.676 g by 55.845 g/mol, resulting in approximately 0.0121 mol of iron.

Similarly, the molar mass of sulfur is 32.06 g/mol, so the moles of sulfur can be calculated by dividing 1.449 g by 32.06 g/mol, giving us approximately 0.0451 mol of sulfur.

The pseudoformula for the compound indicates the ratio of iron to sulfur. From the moles obtained, the ratio of iron to sulfur is approximately 1:3.

Therefore, FeS3 functions as the compound's pseudoformula.

We need to identify the most basic whole-number ratio of atoms for us to arrive at the empirical formula.

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Considering the energy diagram for an exothermic reaction, the expectations for the reverse reaction is: (c) The reverse reaction would be endothermic and require a higher activation energy.

In an exothermic reaction, the products have lower energy than the reactants, resulting in the release of energy. The energy diagram for an exothermic reaction typically shows a downward slope from the reactants to the products, with the energy of the products being lower than the energy of the reactants.

When considering the reverse reaction of an exothermic reaction, it would involve the conversion of products back into reactants. Since the energy diagram for the forward reaction shows a decrease in energy from reactants to products, the reverse reaction would be expected to have an increase in energy from products to reactants.

In the reverse reaction, energy would need to be absorbed from the surroundings, making it an endothermic process. Additionally, the activation energy for the reverse reaction is expected to be higher because the reverse reaction has to overcome a higher energy barrier to convert the products back into the reactants.

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If the feedback loop of the knee reflex was cut off at any points along its path, then there will be no response of knee reflex.

Its results in harm to any part of your reflex arc, which can be due to a basic knee-medicinal condition. Healthcare suppliers can disclose hyporeflexia by spouting your knee with a rubber hammer.

If your doctor taps on a band and there isn't a reflexive movement in the muscle, it's a sign of knee-health matter. Usually, absent reflexes are created by an issue with the nerves in the tendon and muscle. You may have other muscle symptoms along with areflexia, like weakness, or atrophy.

So we can conclude that A decline reflex reply can be related to peripheral knee-nervous system disorders.

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Answer:

hi

Explanation:

A polar molecule has a large difference in electronegativity between atoms in a bond. Lewis structure show the valence electrons around atoms in molecules as dots.

In drawing the Lewis structure of a molecule the very first step is to identify the symbol of each element in the molecule and the number of valence electrons in the outermost shell of the atoms of each element. Next is to assign bonds, formal charges or lone pairs to each atom in the molecule as the case may be.

To identify polar molecules, we need to know the electronegativity difference between the atoms that are bonded in the molecule as well as the magnitude of dipole moment in the molecule.

To determine the number of electron domains in a molecule, we need to count the total number of electron pairs around the valence shell of the central atom in the molecule this gives the electronic geometry of the molecule. The molecular geometry is obtained by counting the number of atoms bonded to the central atom in the molecule.

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Answer:

Magnification is the number of times larger an image is compared with the real size of the object.

Magnification = Image / Actual  = 5/0.4 =12.5

Explanation:

Answer:

d

Explanation:

Answer:

Ver explicación

Explanation:

El método científico se refiere al patrón establecido de resolución de un problema científico. Los siguientes son pasos importantes en el método científico;

Haz una observación.

formular preguntas relevantes.

elabore una hipótesis que pueda ser probada.

Diseña un experimento.

Prueba la hipótesis usando tu diseño experimental.

Teniendo en cuenta ambos escenarios, el último caso en el que estudiantes de diferentes capacidades trabajan juntos para resolver un problema refleja mejor el método científico porque pueden hacerse preguntas entre sí y llegar a hipótesis comprobables que pueden demostrarse como verdaderas o falsas mediante experimentos.

If you prepare a stock solution that has a concentration of 2.5 m. an aliquot with a volume of 10.0 ml is removed from the solution The concentration of the aliquot is 0.25 M.

The concentration of the aliquot can be calculated using the formula:

C1V1 = C2V2

where C1 is the concentration of the stock solution, V1 is the volume of the stock solution, C2 is the concentration of the aliquot, and V2 is the volume of the aliquot.

We can rearrange the formula to solve for C2:

C2 = (C1V1) / V2

Plugging in the values given, we get:

C2 = (2.5 mol/L)(10.0 mL) / 100.0 mL

C2 = 0.25 mol/L

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