In an ecosystem, why can only one species fill an ecological niche?

Researchers who study these sheep have most likely observed a decrease in the wild Soay's size.

"Creative & systematic work performed to increase the quantity of knowledge" is what research is. It entails gathering, organising, and analysing data in order to better understand a subject, and is distinguished by a focus on minimising bias and error sources.

These tasks are distinguished by taking biases into account and adjusting for them. A research effort could build on prior contributions to the field. Researchers who study these sheep have most likely observed a decrease in the wild Soay's size.

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Answer:

I think it would be A but it might be B please tell if wrong

Answer:

A prediction

Explanation:

A prediction, or forecast, is a statement about a future event. They are often, but not always, based upon experience or knowledge and jack is using his knowledge on clouds to predict when it is going to rain.

When free water molecules are excluded from an enzyme's catalytic pocket, a catalytic -OH group on an amino acid side chain becomes a stronger nucleophile. Let me explain why.

In an enzyme's catalytic pocket, water molecules can compete with the amino acid side chains for the reaction site. When water molecules are present, they can act as nucleophiles and participate in the reaction. However, when free water molecules are excluded from the catalytic pocket,
The -OH group on an amino acid side chain, such as serine or threonine, can act as a nucleophile by donating its lone pair of electrons to form a bond with the substrate during the catalytic reaction. This -OH group becomes more readily available for the reaction when water molecules are excluded, as it is no longer in competition with them.

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Answer:

Hey there!

The volume rose by 5 ml, and that means the stone has a volume of 5 ml. Thus, the stone has a density of 25/5, or 5 g/cm^3.

Let  me know if this helps :)

Answer:

0.5474

Explanation:

3.22 x 0.17

     \/

322 x 17 = 5,474

[] There are four places "after" the decimal in 3.22 and 0.17 combined, meaning we move the decimal to the right four times in our current answer

-> 5,474 becomes 0.5474

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:0.55

Explanation:

3.22 × 0.17 calculated with significant figures is 0.55, which has 2 sig figs and 2 decimals. There are 2 steps to calculate 3.22 × 0.17 with sig figs. 0.55 rounded to 1 sig figs is 0.6.

Answer:

75% will have long legs and 25% will have short legs

Explanation:

A balanced chemical equation, which demonstrates that all mass is conserved throughout the reaction, demonstrates the law of conservation of mass. The quantity and types of atoms on either side of a chemical equation should be equal in a balanced chemical equation.

In accordance with the principle of mass conservation, There is neither creation nor destruction of mass during a chemical process. In other words, the total masses of the reactants and products must be equal.

The reactants of photosynthesis are sunlight, 6 carbon dioxide, and 6 water. The mass of the products, which are 1 glucose and 6 oxygen, is equal to the mass of these reactants added together. Contrarily, cellular respiration uses glucose and oxygen gas to create water, carbon dioxide, and ATP, a source of useable energy.

The products of photosynthesis are the reactants of cellular respiration, which is the reverse of photosynthesis. The law of conservation of mass is also observed during cellular respiration.

A balanced chemical equation, which demonstrates that all mass is conserved throughout the reaction, demonstrates the law of conservation of mass. The quantity and types of atoms on either side of a chemical equation should be equal in a balanced chemical equation.

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Answer:

Added

Explanation:

Force is a vector quantity. It follows vector law of addition.

If two forces act in the same direction, the angle between the two force vectors become zero and thus the resultant force turns out to be the algebraic addition of the applied individual forces.

Feq = √(F1²+F2²+2F1.F2.cos0) = √(F1+F2)² = F1+F2.

Answer:

Answer to the following question is as follows;

Explanation:

Alkynes' vapour pressure and normal boiling points are altered when chain length grows, since vapour pressure rises while boiling point falls.

Vapour pressure always include pressure entered by vapour with its condensed phase, pressure include molecules force of attraction include vapour

The number of moles of ethanol consumed during the experiment is

The combustion reaction is given as :

C₂H₅OH  +  3O₂  ----->   2CO₂   +   3H₂O

the initial weight of ethanol = 77 g

the final weight of ethanol is = 10 g

initial moles = mass / molar mas

                    =  77 / 46.07

                    = 1.67 g

final moles = mass / molar mass

                  = 10 / 46.07

                  = 0.21 mol

the moles consumed = 1.67 - 0.21 = 1.46

thus, during one of the trials in this project, the initial weight of ethanol is 77 g and after the combustion, the final weight of ethanol is 10. the number of moles of ethanol consumed during the experiment. the molar mass of ethanol is 46.07 g/mol is 1.46 mol

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Answer:

Royal jelly is a honey bee secretion that is used in the nutrition of larvae and adult queens.

Nuptial flight: a flight of sexually mature social insects (as bees) in which mating takes place and which is usually a prelude to the forming of a new colony; especially : the mass flight and mating of winged sexual forms of ants after leaving the parent nest.

Cocoon: a silky case spun by the larvae of many insects for protection in the pupal stage.

Group B:

Not sure) a- Keep in cold places because when there are changes in weather, it could help the silkworm come out faster.

b-They live together in a large, well organized group and bees engage in complex activities that required works from other community members in the bee society.

c- i dont know this part sorry =(

d-The larvae of a silk moth secrete the silk thread which is used to make clothes. Honey bees produce and store honey which is nutritious food. Silkworm is a creamy white colored insect which is about 2-3 cm long and shining in nature Bee larvae have been shown to be an excellent food source for rearing insects

Explanation:

Answer:

For group A

Explanation:

1. A royal jelly is a substance that is secreted by the worker honeybee's. This is fed to a potential queen bee to help them grow.

2. The nupital flight is part of reproduction for ants, termites, and most bee species.

3. A cocoon is used for the resting pupal stage in the life cycle of animals like butterflies and moths. It is a protective covering and is silky.

4. They feed on mulberry leaves.

A 2 g sample of \(CoCl_{2} .xH_{2} O\) is dried in the oven when the anhydrous salt is removed from the oven its mass is 1.565 g then the value of x is 0.024  .

Calculation ,

mass =  2 g ( given )

molar mass = 134.45 + x × 18

After dehydration or when the anhydrous salt is removed from the oven  mass remain = 1.565 g

Molar mass = 134.45

Thus mass of \(H_{2} O\) = 2 g - 1.565 g = 0.435 g

Number of moles of water =  0.435 g / 18  = 0.024 moles

Therefore value of x = 0.024

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The balanced chemical equation is CaCO3---> CaO+CO2 and the mass of the used limestone is 5.0 kg

The heating of limestone yields calcium oxide and carbon dioxide. It is a decomposition reaction.

The reaction is as follows;

CaCO3---> CaO+CO2

According to the law of conservation of mass, mass is conserved in a reaction,

So the mass of limestone used will be (2.8+2.2=5.0 kg)

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A chromatid's centromere is the area that divides it into two arms. The kinetochore, which connects to the spindle fibres' microtubules, is located around the location of the duplicated chromosome. It aids in the correct division of chromosomes.

The centromere, which is located in the centre, separates the chromosome into two equal arms. Chromosome sub-metacentric or submedian centromere: The centromere is located closer to one end of the chromosome or a little off-center on each chromosome.

The four types of chromosomes—metacentric, submetacentric, acrocentric, and telocentric—are differentiated by the position of the centromere. As was already established, the centromere is easily pictured as the most condensed area of a mitotic chromosome.

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The complete question is:

How does the position of the centromere change among the different chromosome?

Answer:

Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.

Explanation:

Answer:

Yes.

Explanation:

Electric charge cannot change the elemental composition of a substance.

The application of charge to the aluminium foil does not change the composition of the foil and hence the foil will still be made up of aluminium atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The molarity of the resulting solution is 0.65 M.

PV = nRT

Pressure is P.

Volume is V.

The number of moles is n.

Gas constant R

Temperature is T

n = PV/RT

n = 0.97 * 12.7/0.082 * 306

n = 12.3/25.1

N=0.49 moles.

Number of Mole/Volume Equals Molarity of the Solution

0.49 moles/0.750 liters

= 0.65 M

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Answer:

why u was giving free point and I think u have great day

Answer:

are you increasing your followers

Explanation:

if yes then I will follow you

The oxidizing agent is dependent on the standard reduction potential of the substance. As the reduction potential increases, the oxidizing tendency of the substance would be increased. The oxidizing agent is the substance that oxidizes others and gets reduced itself.

In a redox chemical process, an oxidizing agent is a material that "accepts" or "receives" an electron from a reducing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) (called the reductant, reducer, or electron donor). Any chemical that oxidizes another substance is thus an oxidant. By stating that oxidizers "undergo reduction" and "are reduced" whereas reducers "undergo oxidation" and "are oxidized," it is reasonable to deduce that the amount of electron loss for the oxidizer reduces while it increases for the reductant. The three main oxidizing agents are oxygen, hydrogen peroxide, and halogens.

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Answer:

continental plate boundaries

Explanation:

water is a pure substance

Answer:

The density is d=1g/cm cubed

Explanation:

Answer:

Explanation: I can't give you the answer you with the sentence but i will help you the best i can

One qualitative measure of the strength of an acid or a base solution is the pH scale A logarithmic scale that relates the concentration of the hydrogen ion in solution.

Oxygen has a valency of 2. It needs two electrons to attain octet. An oxygen molecule is formed by sharing of two electrons by each oxygen in O2. Oxygen does not exists in the atomic state as single oxygen because it is unstable.

Oxygen is 8th element in periodic table. Thus its atomic number is 8 and the number if electrons be eight. It contains 2 inner electrons and six valence electrons.

According to rule of octet, an atom becomes stable only if it fill its valence orbital completely. Thus every atoms which are deficient of electrons will forms molecules or compounds by accepting or sharing electrons.

Oxygen attains octet when it fills eight electrons in its valence shell. Thus, it need two more electrons and it shares its two electrons with other oxygen atom which in turn sharing ist two electrons to the first atom. Hence it can be stable in the state of molecular O₂.

That's why oxygen molecules contains even number of atoms.

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Two moles of an ideal gas are placed in a container whose volume is 4.8 x 10⁻³ m³. The absolute pressure of the gas is 2.4 x 10⁵ Pa. The average translational kinetic energy of a molecule of the gas is 2.67 x 10⁻²⁰ Joules.

The average translational kinetic energy of a molecule of an ideal gas can be determined using the formula:

Average kinetic energy per molecule = (3/2) * (k * T)

where k is the Boltzmann constant (1.38 x 10⁻²³ J/K) and T is the temperature in Kelvin.

To calculate the temperature, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (8.314 J/(mol K)), and T is the temperature in Kelvin.

Rearranging the equation to solve for temperature, we have:

T = (PV) / (nR)

P = 2.4 x 10⁵ Pa

V = 4.8 x 10⁻³ m³

n = 2 moles

R = 8.314 J/(mol K)

T = ((2.4 x 10⁵ Pa) * (4.8 x 10⁻³ m³)) / ((2 mol) * (8.314 J/(mol K)))

Calculating T, we find:

T = 1.154 x 10⁴ K

Now, we can calculate the average translational kinetic energy per molecule:

Average kinetic energy per molecule = (3/2) * (k * T)

Average kinetic energy per molecule = (3/2) * (1.38 x 10⁻²³ J/K) * (1.154 x 10⁴ K)

Calculating the average kinetic energy per molecule, we find:

Average kinetic energy per molecule = 2.67 x 10⁻²⁰ J

Therefore, the average translational kinetic energy of a molecule of the gas is approximately 2.67 x 10⁻²⁰ Joules.

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A titration curve is a graph that shows the change in pH as a titrant is added to a solution. It is constructed by plotting the pH of the analyte solution against the volume of the titrant added, as shown in the graph.

The titration curve for a strong acid-strong base titration is shaped like an S-curve because at low pH values, the addition of base has little effect on the pH of the solution. The pH changes rapidly as the equivalence point is approached because the amount of base added to the solution has become significant.At the equivalence point, the pH of the solution is equal to 7. After the equivalence point, the addition of more base has little effect on the pH of the solution because the excess base is neutralized by the acid in the solution, so the pH of the solution remains relatively constant.This curve has the shape it does because the pH of the solution is determined by the concentration of hydrogen ions, which is dependent on the concentration of the acid or base in solution.

At the start of the titration, the concentration of hydrogen ions is high because the solution contains an excess of acid. As the base is added, it neutralizes the acid and the concentration of hydrogen ions decreases, causing the pH to increase. When all the acid has been neutralized, the concentration of hydrogen ions is zero, and the pH of the solution is determined by the concentration of hydroxide ions, which are produced by the reaction between the base and water.

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Answer: Rate = k[NO2][Cl]

Explanation:

The rate law for a reaction describes how the rate of the reaction depends on the concentrations of the reactants. If the second step is the slow step in the mechanism, then the rate law should reflect the rate-determining step, which is the slowest step in the mechanism. In this case, the rate law would be:

Rate = k[NO2][Cl]

This means that the rate of the reaction is directly proportional to the concentration of NO2 and the concentration of Cl.

Answer:

The order of a element in period 2 that has 6 valence electrons is:  

1s²2s²2p²

Explanation:

The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).  

There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Electrons with less energy will be spinning at level 1. Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f. In the sub-level s there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.

In level 1 there is only one sub-level, which will be the s. In level 2 there are 2 sub-levels, the s and the p. At level 3 there are 3 sub-levels s, p and d. And at level 4 there are 4 sub-levels, the s, the p, the d and the f.

Aufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits around the nucleus of the atom. This principle states that the filling of these orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.

The simplest of the sub-levels is 1s. If you fill the 1s you can start filling the 2s. After the 2s sub-level is satisfied, the 2p can begin to fill and so on.

So, the order of a element in period 2 that has 6 valence electrons is:  

1s²2s²2p²

129.3 mL of NaOH are required to react with all the HCl in the 10.00 mL aliquot.

To solve this problem, we need to use stoichiometry and the concept of limiting reagents.

First, let's calculate the number of moles of HCl used in the reaction:
7.50 mL of 2.00 M HCl = 0.015 mol HCl

Next, let's use stoichiometry to determine the number of moles of CaCO₃ that reacted with the HCl:
1 mol CaCO₃ reacts with 2 mol HCl
0.015 mol HCl x (1 mol CaCO₃ / 2 mol HCl) = 0.0075 mol CaCO₃

Now we can use the mass and molar mass of CaCO₃ to determine the mass of CaCO₃ used:
mass CaCO₃ = number of moles x molar mass
mass CaCO₃ = 0.0075 mol x 100.1 g/mol = 0.751 g

However, this mass was used to make a 125.0 mL solution, so we need to calculate the concentration (in M) of this solution:
0.751 g / 125.0 mL = 0.006008 M

Now we can use the volume and concentration of the NaOH solution to determine the number of moles of NaOH used:
10.00 mL of 0.058 M NaOH = 0.00058 mol NaOH

Finally, we can use stoichiometry to determine the volume of NaOH required to react with all the HCl in the 10.00 mL aliquot:
1 mol HCl reacts with 1 mol NaOH
0.0075 mol HCl x (1 mol NaOH / 1 mol HCl) = 0.0075 mol NaOH
volume of NaOH = number of moles / concentration
volume of NaOH = 0.0075 mol / 0.058 M = 0.1293 L = 129.3 mL

Therefore, 129.3 mL of NaOH are required to react with all the HCl in the 10.00 mL aliquot.

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In a coffee cup calorimetry experiment the enthalpy change for a reaction Mathematical relation:-q = (specific heat) x m x Δt

The difference between the amount reactant and total product molar enthalpies, computed for substances in their standard states, is the standard enthalpy of reaction for a chemical reaction.

Calorimeters are tools used to determine how much heat is exchanged during chemical reactions. The coffee cup calorimeter and the bomb calorimeter are two popular varieties of calorimeters.

A polystyrene/Styrofoam cup with a cover is used in a coffee cup calorimeter. A thermometer is placed through the lid of the cup after it has been filled with a known amount of water.

The heat produced by a chemical reaction is absorbed by the water. The quantity of heat that has been absorbed or developed is determined using the change in water temperature.

Heat flow is calculated using the following mathematical relation:-q = (specific heat) x m x Δt

where q = heat flow, m=mass in grams, Δt =change in temperature.

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