What is an ecosystem? ?

Answer:

Explanation:

7A 0.2

7B cork

7C  Yes because the lighter it is the more likely it will float

7D  Density is one of the fundamental scientific principles of life. It can describe any everyday object. Despite its significance, students often struggle to understand what it really is. Density is a measurement of how much space or volume is packed in an object or substance.

8   property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination.

Answer:

layers of epithelial tissue

Answer:

It's B

Explanation:

In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.

Here are the steps to be followed:

By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.

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Answer:

CHO

Explanation:

Carbon = 41%,  Hydrogen = 4.58%, oxygen = 54.6%

Step 1:

Divide through by their respective relative atomic masses

41/ 12,         4.58/1,         54.6/16

3.41              4.58            3.41

Step 2:

Divide by the lowest ratio:

3.41/3.41,      4.58/3.41,     3.41/3.41

1,                    1,                  1

Hence the empirical formula is CHO

Answer:

The empirical formula of X is C3H4O3.

Explanation:

The decision-making process, also known as the evaluation process, is the process of choosing a strategy based on predetermined criteria.

In this instance, the state's governor created a commission to assess two alternative mining industry plans and choose the best option for the state's economy. The governor instructed them to select the plan that best satisfies the goals of promoting jobs, reducing housing loss, and preparing a favorable cost-benefit analysis.

The commission evaluated the two designs on the basis of five factors. Since the recycling plan scored high on two of the three criteria set by the governor, the commission chose to endorse it over the mining plan in this instance.

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Answer:

False

Explanation:

The given statement stating that resistance  is the slowing of the flow of electrons and where some of the electrical energy is converted into heat is true and it is a opposite of conduction.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Answer:

gas giant

large red spot

and i think possibly icy/liquid surface

The balanced chemical reaction between H₂(g) and O₂(g) molecules is given by 4 H₂(g) + 2O₂(g) → 4 H2₂O(g).

A chemical equation is said to be balanced if the quantity of each kind of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

The reactant box contains 4 molecules of H₂ and two molecules of O₂ and the product box contains 4 molecules of water.

The reduced balanced equation is as follows:

2H₂(g) + O₂(g) ⇒ 2H₂O(g).

Thus,the balanced equation that is represented in the drawings is 4 H₂(g) + 2O₂(g) → 4 H2₂O(g).

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Your question is incomplete, incomplete part of question attach in image below.

Can be used to calculate the y-component of the electric field in N/C produced by a positive point charge at coordinate (0,0) in water. Therefore, the positive point charge in water at coordinate (1.01, -3.55) produces a total electric field in N/C with a y-component of -4.55 x 105 N/C.

An electrically charged object can produce an electromagnetic field that has an impact on other electrically charged objects nearby. Lines of force radiating from the charged object and interacting with other charged objects can be used to represent this field. As the charged object is moved further away, the electric field's strength weakens in direct proportion to the charge. A fundamental idea in physics, the electric field is utilised to explain how charged particles interact. It is measured in units of N/C and is a vector quantity (Newtons per Coulomb). Coulomb's law, which states that the force between two charged objects is proportional to the product of the electric field can be used to compute the electric field.

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Answer:

B

Explanation:

Answer:

B. are openings in the earth surface

Answer: Chromium is less reactive as compared to Aluminium as it can not easily electrons as aluminium.

Explanation:

The arrangement of metals in a series according to the decreasing order of their reactivity is called reactivity series.

The metals that are placed above hydrogen are more reactive and those below hydrogen are less reactive.

A metal placed above another metal can displace lower metal from its salt solution. Thus a metal placed above in series is more reactive than metals placed below it.

As aluminium can easily lose electrons as compared to chromium , it is more reactive than Chromium.

The numerical value of Kc for this reaction is 0.0804 if a 2.00 mol sample of A is sealed in a 1.00 L flask and allowed to reach equilibrium with B and C. The equilibrium concentration of B is found to be 0.39 M.

The equilibrium constant expression for the reaction A (g) ⇔ B (g) + C (g) is:

Kc = [B] [C] / [A]

where [A], [B], and [C] are the molar concentrations of A, B, and C at equilibrium, respectively.

We are given that the equilibrium concentration of B is 0.39 M. However, we are not given the equilibrium concentration of A or C. To solve for Kc, we need to find the equilibrium concentrations of all three species.

Since the reaction is in a 1.00 L flask and we started with a 2.00 mol sample of A, the initial concentration of A is 2.00 M. At equilibrium, the concentration of A will be equal to (2.00 - [B]) M, and the concentration of C will also be equal to [B] M (because the stoichiometric coefficients for B and C are equal).

Substituting these values into the equilibrium constant expression, we get:

Kc = (0.39 M)^2 / (2.00 M - 0.39 M) = 0.0804

Therefore, the numerical value of Kc for this reaction is 0.0804.

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Answer:

C. commensalism.

Explanation:

Here is the answer

Answer: THE ANSWER IS A

Explanation:

Lin never forgot how it felt to be left out

Answer:

to be left out

Explanation:

Lin never forgot how it felt to be left out.

In the paragraph given, we see Lin being left out of a play. She wanted to be Dorthy but was told she couldn't. This led to feelings of being left out.

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.

- Heather

Answer:

1.09

Explanation:

Keep in mind that the volume of the solution changes during this titration, so to compute the amount of hydronium that is neutralized during this addition of base (in order to calculate the final pH of the solution), we must calculate the moles of all species in solution initially present. Because both NaOH and HCl ionize completely:initial mol OH−=mol NaOH=(0.0050 L)(0.10 molL)=0.00050 mol OH−initial mol H3O+=mol HCl=(0.050 L)(0.10 molL)=0.0050 mol H3O+The acid is in excess, so all of the OH− present will neutralize an equivalent amount of H3O+, forming water. Thus we simply subtract the moles of hydroxide from the moles of hydronium in solution to find the resultant moles of H3O+ after this neutralization:final mol H3O+= initial mol H3O+−initial mol OH−final mol H3O+=0.0050 mol−0.00050 mol=0.0045 mol H3O+We now calculate the total volume of the solution by adding the volumes of acid and base initially combined: 0.050 L+0.0050 L=0.055 LTo get [H3O+], we divide the final moles of hydronium by the final solution volume:[H3O+]=final mol H3O+ total volume=0.0045 mol0.055 L≈0.08181molLFinally, to find pH:pH=−log[H3O+]=−log(0.08181)=1.09Since the hydronium concentration is only precise to two significant figures, the logarithm should be rounded to two decimal places.

The concentration of the citric acid is 0.090 mol/dm3 based on the given titration results.

To calculate the concentration of the citric acid, we need to use the stoichiometry of the balanced chemical equation and the volume of sodium hydroxide used.

The balanced equation for the reaction between citric acid (C6H807) and sodium hydroxide (NaOH) is:

C6H807 + 3NaOH → C6H507Na3 + 3H2O

From the equation, we can see that 1 mole of citric acid reacts with 3 moles of sodium hydroxide.

First, let's calculate the number of moles of sodium hydroxide used in the titration. We know that the volume of the sodium hydroxide solution is 25 cm3 and its concentration is 0.150 mol/dm3.

Moles of NaOH = concentration × volume

= 0.150 mol/dm3 × 0.025 dm3

= 0.00375 mol

Since the stoichiometry of the reaction is 1:3 between citric acid and sodium hydroxide, the number of moles of citric acid is three times the number of moles of sodium hydroxide used in the titration.

Moles of C6H807 = 3 × 0.00375 mol

= 0.01125 mol

Now, we can calculate the concentration of the citric acid.

Concentration of citric acid = moles of C6H807/volume of C6H807

= 0.01125 mol / (12.50 cm3/1000)

= 0.090 mol/dm3

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PCC is the best reagent for performing the following reactions: H2/PdH.

The chemical formula for sodium carbonate is Na2CO3. It is a carbonic acid diazonium salt. It is also referred to as soda ash, soda crystals, and washing soda. Carbonic acid and sodium hydroxide are produced when this inorganic compound is dissolved in water due to its water-soluble nature. It is odorless and a white powder in its purest form.

A substance or compound that is added to a system to either initiate a chemical reaction or determine whether one has occurred is referred to as a reagent (/riednt/ ree-AY-jnt) or analytical reagent in chemistry. Although the terms "reactant" and "reagent" are frequently used interchangeably, "reactant" refers to a substance that is consumed during a chemical reaction.

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Answer:

See explanation

Explanation:

The relationship between the activation energy and rate of reaction is best captured by the Arrhenius equation;

k= Ae^-Ea/RT

Where;

k= rate constant

A= pre-exponential factor

Ea=activation energy

R= gas constant

T= temperature

We can see from the foregoing that, as the activation energy increases, the rate of reaction decreases and vice versa. reactions that have a very high activation energy are markedly slow.

Since the activation energy for the malonic acid reaction is found to be greater than the activation energy for the tartaric acid reaction, then the rate of the malonic acid reaction(k) will be slower than that of the tartaric acid reaction.

The study of chemistry and bonds is called chemistry. There are two types of elements metal and nonmetals.

The correct answer is mentioned below.

The equation is as follows:-

\(k= Ae^{-Ea/RT\) Where;

We can see from the foregoing that, as the activation energy increases, the rate of reaction decreases and vice versa. reactions that have very high activation energy are markedly slow. Since the activation energy for the malonic acid reaction is found to be greater than the activation energy for the tartaric acid reaction, then the rate of the malonic acid reaction(k) will be slower than that of the tartaric acid reaction.

Hence, the correct answer is mentioned above.

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Density of given block is 0.0308 g/cm³

Given,

mass of the object is 4.465g

volume of the object is 144.2cm³

we have to find out density of object in g/cm³

we know that,

Density = mass / volume

= 4.465 / 144.2 cm³

= 0.0308 g/cm³

Therefore density of object with mass of 4.465 g and volume of 144.3cm³ is 0.0308 g/cm³.

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Answer:

a) 2 (H+) ions

b) 1 (SO3²-) ions

c) 1.36 × 10^-22 grams.

Explanation:

According to this question, sulfurous acid has a chemical formula; H2SO3. It is made up of hydrogen and sulfite ion. Hydrogen ion (H+) is the cation while sulfite ion (SO32-) is the anion.

Based on the chemical formula, there are 2 moles of hydrogen ions that reacts with 1 mole of sulfite ion as follows:

2H+ + SO3²- → H2SO3

Hence;

- there are 2 hydrogen ions (2H+) present in H2SO3.

- there is 1 sulfite ion (SO3²-) present in H2SO3.

c) The mass of one formula unit of H2SO3 is calculated thus:

= 1.008 (2) + 32.065 + 15.999(3)

= 2.016 + 32.065 + 47.997

= 82.08 a.m.u

Since, 1 gram is = 6.02 x 10^23 a.m.u

82.08 a.m.u = 82.08/6.02 × 10^-23

= 13.6 × 10^-23

= 1.36 × 10^-22 grams.

The general form of a neutralization reaction is HF + FrOH → FrF + H₂O

We refer to this as a neutralisation reaction. Only this reaction, which produces NaCl and water as products, is a neutralisation reaction since it involves HCl and NaOH. The resulting response is listed below: NaCl(aq) + H₂O = HCl(aq) + NaOH(aq) (l)

The interaction of H⁺ ions and OH⁻ ions produces water in a neutralisation reaction, which occurs when an acid and a base combine to make water and a salt. The neutralisation of a strong acid and strong base yields a pH of 7.

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Answer:it would be the highest occupied sublevel

Explanation:

you would have to do the highest sublevel

Answer: It was 18 both in the Third and Fourth levels

Answer:

may die depending on how completely it was girdled.

Explanation:

Answer:

Explanation:

According to the formula provided in the question, the formula for water intake amount is C = [w × f × (g+12) × m × 30]/8

where c is the fluid amount in cups

w is the weight in pounds (158 pounds)

f is the age factor (0.642 because the age is below 30)

g is the gender actor (1 because the individual is a male)

m is the exercise time in minutes (50 minutes)

c = 158 × 0.642 × (1 + 12) × 50 × 30/8

c = 1978001.99/8

c = 247250.25 cups

NOTE: Kindly verify the formula in this question before proceeding to practicing the steps in this answer

The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M

First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:

Mole of NiSO₄ = mass / molar mass

= 38.81 / 154.75

= 0.25 mole

Now, we shall determine the molarity of the solution. Details below:

Molarity of solution = mole / volume

= 0.25 / 0.467

= 0.535 M

Thus, the molarity of the solution is 0.535 M

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The amount of heat transferred would be 1269.67 J.

To calculate the heat transferred (q), we can use the specific heat capacity (c) of aluminum, which is 0.903 J/g°C, the mass of aluminum (m), and the change in temperature (ΔT):

q = m x c x ΔT

where ΔT = (final temperature - initial temperature)

Substituting the given values, we get:

ΔT = 71.6°C - 32.5°C = 39.1°C

m = 36.4 g

c = 0.903 J/g°C

q = 36.4 g x 0.903 J/g°C x 39.1°C

q = 1269.67 J

Therefore, the heat transferred when the temperature of 36.4g of aluminum is raised from 32.5°C to 71.6°C is 1269.67 J.

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