Which statement accurately describes homeostasis?

A.Homeostasis is a factor in the environment that creates a response.

B.Homeostasis is the number of cells in an organism, such as a unicellular or multicellular organism.

C.Homeostasis is a place that can provide shelter to different organisms.

D.Homeostasis is the maintenance of a stable internal environment despite changing external conditions.

ANSWER: C) Law of Conservation of Mass

EXPLANATION: In the given cycle, it is seen that th sediments are layered and gets compressed into sedimentary rocks which eventually gets heated and compressed to form metamorphic rocks. But, the total amount of minerals present in the sediments remains the same throughout any stage of the cycle.

This proves the law of conservation of mass which states that mass can not be created nor be destroyed, it can only be transferred from one form to another. So, in this case, only phase transition occurred but the component which is mineral inside the sediments remains constant.

Therefore, the answer is law of conservation of mass.

The answer on Edge is Moseley.

A molecule is the smallest particle of a covalent compound that has the properties of that compound.

A molecule is the smallest particle of a covalent compound that still has the properties of the compound.

Answer: [tex]C_9H_8O_4[/tex]

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula is [tex]C_9H_8O_4[/tex]

The empirical weight of [tex]C_9H_8O_4[/tex] = 9(12)+8(1)+4(16)= 180g.

The molecular weight = 180 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{180}{180}=1[/tex]

The molecular formula will be=[tex]1\times C_9H_8O_4=C_9H_8O_4[/tex]

Thus molecular formula of aspirin will be [tex]C_9H_8O_4[/tex]

The molecular formula of aspirin is C9H8O4.

In the molecular formula of aspirin, there are 9 carbon atoms, 8 hydrogen atoms and 4 oxygen atoms.

The empirical formula C9H8O4 gives the ratio of the elements in the compound, but the molecular formula provides the actual number of atoms. Therefore, the molecular formula of aspirin is C9H8O4.

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First structure is  CH₃-CH₃. It is an alkane with two carbon atoms hence it is called ethane.

Second structure is  CH₃-CH₂-CH₂-CH₃. It is an alkane with four carbon atoms hence it is called butane.

Third structure is CH₄. It is an alkane with one carbon atom hence it is called methane.

Fourth structure is CH₃-CH₂-CH₃. It is an alkane with three carbon atoms hence it is called propane.

Muscovite and biotite mica are the two minerals that a property in common which is tenacity .

Tenacity is the ability of the mineral to resist breakage. It is described in terms such as elastic, felixible etc.

Both muscovite and biotite mica are elastic minerals as these minerals bend when force is applied on them, but they regain their original shape when the external force is removed.

The statement reporting the expansion nowadays has been faster than the expansion after the big bang theory has been true. Thus, option A is correct.

The expansion of the universe has been based on the distance in between the celestial bodies concerning the forces. The big bang theory has been responsible for the explosion that has been led to the arrangement of the bodies in the universe that has been based on their sizes and force.

However, there has been an explosion that has been slowed down after the big bang theory. Although in recent years there has been the presence of dark energy found that has been responsible for the increased expansion of the universe.

Thus, the statement reporting the expansion nowadays has been faster than the expansion after the big bang theory has been true. Thus, option A is correct.

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Answer : The chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.

Explanation :

The rules for naming the chemical name of the compound :

In the given compound, the nickel is the cation and first element in the formula and the oxidation state of nickel is, (+3). The second element is oxygen which is named as oxide.

Thus, the chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.

The chemical name of the compound represented by the formula Ni₂O₃ is nickel (III) oxide.

Ionic compounds are formed when ions with opposing negative and positive charges form ionic bonds and form compounds, which are compounds made of ions.

Ionic compounds are named by stating the cation first, followed by the anion. When a neutral atom loses one or more electrons, it acquires a positive charge and is called a cation and when an atom gains one or more electrons, it becomes an anion and acquires a negative charge.

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When a substance undergoes a chemical change, it results in different physical properties .

it turns into diffrent pyshical properties

Explanation:

The chief advantage of the metric system over other systems of measurement is that it B. is in multiples of 10.

This can be seen in the picture below that shows the prefixes of the metric system.

Answer:

The correct answer is option B, that is, is in multiples of 10.

Explanation:

The metric system refers to an internationally acclaimed decimalized system of measurement. It is used globally, and it is the most usual or the only system of measures and weight in the places where it is adopted.  

As the metric system is a decimal system of measures and weight, it is easy to transform in between the units, for example, from grams to kilograms, or from millimeters to meters, basically by dividing or multiplying by 10, 100, 1000, and others. Usually, this is the case of moving the decimal point to the left from the right.  

To find the mass of bromine that reacts with 16.2 g of aluminium, we need to use the concept of stoichiometry. According to the balanced chemical equation, 2 moles of aluminium react with 3 moles of bromine. By converting the mass of aluminium to moles and using the mole ratio, we can determine the moles of bromine required. Finally, converting the moles of bromine to grams gives the mass of bromine.

To determine the mass of bromine that reacts with 16.2 g of aluminium, we need to use the concept of stoichiometry, which is the quantitative relationship between reactants and products in a chemical reaction.

The balanced chemical equation for the reaction between bromine and aluminium is:

2Al + 3Br2 → 2AlBr3

From the equation, we can see that 2 moles of aluminium react with 3 moles of bromine to produce 2 moles of aluminium bromide. Therefore, we need to convert the mass of aluminium to moles, and then use the mole ratio to find the moles of bromine required. Finally, we can convert the moles of bromine to grams.

Let's calculate step by step:

By following these steps, you will be able to find the mass of bromine that reacts with 16.2 g of aluminium.

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m₁ = mass of water = 75 g

T₁ = initial temperature of water = 23.1 °C

c₁ = specific heat of water = 4.186 J/g°C

m₂ = mass of limestone = 62.6 g

T₂ = initial temperature of limestone = ?

c₂ = specific heat of limestone = 0.921 J/g°C

T = equilibrium temperature = 51.9 °C

using conservation of heat

Heat lost by limestone = heat gained by water

m₂c₂(T₂ - T) = m₁c₁(T - T₁)

inserting the values

(62.6) (0.921) (T₂ - 51.9) = (75) (4.186) (51.9 - 23.1)

T₂ = 208.73 °C

in three significant  figures

T₂ = 209 °C

To find the specific heat capacity of the metal, we can use the formula: q = mcΔT, where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Substituting the given values and solving, we find that the specific heat capacity of the metal is approximately 0.252 J/g °C.

To find the specific heat capacity of the metal, we can use the formula: q = mcΔT, where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. In this case, we know the initial and final temperatures of the metal, as well as the mass of the water, so we can plug these values into the equation. Rearranging the equation to solve for c, we have: c = q / (mΔT). Substituting the values and solving, we find that the specific heat capacity of the metal is approximately 0.252 J/g °C.

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the answer is a} physical and chemical changes

i think the answer is A. Physical and chemical changes

Answer is: 0.102 moles of HCl would react.

Balanced chemical reaction:

2HCl(aq) + Sr(OH)₂ → SrCl₂(aq) + 2H₂O(l).

V(Sr(OH)₂) = 37.1 mL ÷ 1000 mL/L.

V(Sr(OH)₂) = 0.0371 L; volume of the strontium hydroxide solution.

c(Sr(OH)₂) = 0.138 M; molarity of the strontium hydroxide solution.

n(Sr(OH)₂) = c(Sr(OH)₂) · V(Sr(OH)₂).

n(Sr(OH)₂) = 0.0371 L · 0.138 mol/L.

n(Sr(OH)₂) = 0.0051 mol; amount of the strontium hydroxide.

From balanced chemical reaction: n(Sr(OH)₂) : n(HCl) = 1 : 2.

n(HCl) = 2 · n(Sr(OH)₂).

n(HCl) = 2 · 0.0051 mol.

n(HCl) = 0.0102 mol; amount of the hydrochloric acid.

The question involves stoichiometry in a chemical reaction between hydrochloric acid (HCl) and strontium hydroxide (Sr(OH)2). The provided volume and molarity of Sr(OH)2 allow us to calculate the needed moles of HCl, which revolves around a 2:1 stoichiometric ratio. Therefore, to react with 37.1 mL of 0.138 M Sr(OH)2, we need 0.0102 moles of HCl.

The subject matter involves a chemical reaction between hydrochloric acid (HCl) and strontium hydroxide (Sr(OH)2). First, we need to identify the stoichiometric ratio between HCl and Sr(OH)2. The chemical equation for their reaction is 2HCl + Sr(OH)2 → SrCl2 + 2H2O, indicating a 2:1 ratio between HCl and Sr(OH)2.

Next, calculate the moles of Sr(OH)2 using the given volume and molarity: 37.1 mL Sr(OH)2 * (1 L/1000 mL) * 0.138 mol/L = 0.0051 mol of Sr(OH)2. Since the ratio of HCl to Sr(OH)2 is 2:1, this means we would need 2 * 0.0051 = 0.0102 moles of HCl for the reaction.

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Yes, it will take 5 cell divisions for one original cell to produce 128 cells.

Molar mass HCl = 36.5 g/mol

number of moles:

mass of solute / molar mass:

9.63 / 36.5 => 0.263 moles

Volume = 1.5 L

M = n / V

M = 0.263 / 1.5

M = 0.1753 mol/L

The observation that would indicate that a material is a pure substance is:

C. It cannot be physically broken down into different types of atoms.

A pure substance consists of only one type of atom or molecule, meaning it cannot be broken down into simpler substances by physical means. Option C describes this characteristic, indicating that the material cannot be physically separated into different types of atoms, thus suggesting it is a pure substance. Options A, B, and D describe properties that may or may not be indicative of a pure substance, but they do not directly address the fundamental composition of the material as being made up of only one type of atom or molecule.

The probable question may be:

Which of the following observations would indicate that a material is a pure substance?

A. It does not dissolve in water.

B. It changes color after heating.

C. It cannot be physically broken down into different types of atoms.

D. It can be physically broken down into different types of molecules.

Given:

Volume of wine = 100 ml

Initial Mass of ethanol = 12.0 g

Mass of acetic acid formed = 4.00 g

To determine:

% ethanol converted to acetic acid

Explanation:

Molar mass of C2H5OH (ethanol) = 46 g/mol

Molar mass of C2H4O2 (acetic acid) = 60 g/mol

The reaction of ethanol in air is:

C2H5OH + O2 → C2H4O2 + H2O

Based on the stoichiometry: 1 mole of ethanol produces 1 mole of acetic acid

Moles of ethanol initially present = mass of ethanol/molar mass

= 12/46 = 0.2609 moles

Moles of acetic acid produced = moles of ethanol converted

= 4/60 = 0.0667 moles

Mass of ethanol converted = Moles of ethanol * molar mass

= 0.0667 * 46 = 3.07 g

% ethanol converted = (mass of ethanol converted/initial mass )*100

% converted = (3.07/12.0) *100 = 25.6%

Ans: 25.6% of ethanol gets converted to acetic acid

Strontium has a larger atomic radius because it has more shells of electrons than magnesium does.

Mg is in Period 3 and Sr is in Period 5. Thus, Sr has two more shells of electrons than Mg.

Each shell is bigger than the one before it, so Sr has a larger atomic radius than Mg.

Both Sr and Mg have the same number of valence electrons, so they are not a factor in determining the atomic radius.

The nucleus is so small compared to the size of an electron shell that its size is not a factor in determining the atomic radius.

(d) Density of Benzene: 0.8786 g/cm cubed

(m) Mass: 20.00g

Formula to solve (v) volume of benzene: V=m/d

V=20g / 0.8786g/cm cubed

Answer: Volume of benzene is: 22.8 cm cubed  

Explanation: Well, density is mass divided volume. In this, it is what the volume is. All you need is mass divided by density. Hope this helps!

For a scientist, using technical jargon and a structured format is appropriate when communicating with fellow scientists. However, when reaching out to the general public or media, more straightforward language is more effective.

In scientific writing, the utilization of technical jargon and a structured format is often applicable while communicating with other scientists. This is because other scientists are more likely to understand the highly technical terms due to their background and expertise. For instance, a molecular biologist writing a research paper for a peer-reviewed journal would engage an academic tone and utilize specific terminologies that his or her fellow scientists can understand. However, when scientists are writing books to generate interest among the general public, giving TV or radio interviews, or presenting information to the media, it’s crucial to simplify the language. This ensures that science remains accessible to non-specialists who may not be familiar with the jargon.

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A fusion reaction takes place between carbon and another element. Neutrons are released, and a different element is formed. The different element is Lighter than helium.

A fusion reaction takes place between carbon and another element neutrons are released and a different element is formed.

The different element is heavier than helium.

In a fusion reaction, two light nuclei merge to form a single heavier nucleus.

Nuclear fusion produces elements that are heavier than helium.

A fusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed.

The reason behind that helium is the lightest element and if carbon fused with another element, it would be heavier.

Hence,  a fusion reaction takes place between carbon and another element neutrons are released and a different element is formed.

The different element is heavier than helium.

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Option B- Diverging is the correct answer.

Given data:

 x ∝ 1/y

Equation related to question:

 x = k/y ,                                                y = K / x

x=1 y=______ , K = 18

Solution:

Equation : y = K / x

Putting values:

y= 18 / 1 = 18       ,                               Hence  Y = 18

x=2 y=______ , K =18

Equation : y = K /x

Putting values:

y = 18/2 = 9         ,                              Hence y = 9

x=3 y=_______, K = 18

Equation : y = K /x

Putting values:

y = 18 / 3 = 54  ,                                  Hence y = 6

x=6 y=_______, K = 18

Equation : y = K /x

Putting values:

y = 18 / 6 = 108                                    Hence y = 3

x=9 y=______, K = 18

Equation : y = K /x

Putting values:

y = 18 /9 = 2                                       Hence y = 2

x=18 y=_______ , k = 18

Equation : y = K /x

Putting values:

y = 18 / 18 = 324                                  Hence y = 1

Here are the answers:

The force which helps protons overcome their natural inclination to repel each other is call the strong force. A

Final answer:

The force that helps protons overcome their natural repulsion and holds atomic nuclei together is the strong nuclear force, making option A (protons; strong) the correct answer.

Explanation:

There are four fundamental forces in the universe, one of which plays a critical role in maintaining the structure of atomic nuclei despite the electrostatic repulsion between protons. This force, which helps protons overcome their natural inclination to repel each other, is known as the strong nuclear force. The strong nuclear force acts not only between protons but also between neutrons, and between protons and neutrons, effectively holding the nucleus of an atom together. It is much stronger than the electrostatic repulsion between the positively charged protons within the distances found inside the nucleus but becomes virtually non-existent over larger distances.

Thus, the correct answer to the question is: This force, which helps protons overcome their natural inclination to repel each other, is called the strong nuclear force, corresponding to option A) protons; strong.

The size difference between the beams indicates the weights and reading scales that each beam measures.

The triple beam balance is a precision instrument for measuring mass. It gets its name from its three beams, with the middle beam being the largest, the far beam being medium in size, and the front beam being the smallest.

It is made up of three beams, each with a single sliding weight whose size corresponds to the gradations of the notched scale on the beam.

It gets its name from its three beams, with the middle beam being the largest, the far beam being medium in size, and the front beam being the smallest.

The size variation among the beams implies the weights and reading scales that each beam measures.

Thus, these are the differences between the three beams on a triple beam balance.

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Answer is: 8568.71 of baking soda.

Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.

V(H₂SO₄) = 17 L; volume of the sulfuric acid.

c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.

n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).

n(H₂SO₄) = 17 L · 3 mol/L.

n(H₂SO₄) = 51 mol; amount of sulfuric acid.

From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.

n(NaHCO₃) = 2 · 51 mol.

n(NaHCO₃) = 102 mol, amount of baking soda.

m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).

m(NaHCO₃) = 102 mol · 84.007 g/mol.

m(NaHCO₃) = 8568.714 g; mass of baking soda.

I just scored the test I'm 100% sure its: 1.2 x 10^10 mm^3

CHECK THE ATTACHMENT FOR COMPLETE QUESTION.

The correct answer to the question is 1.2 × 10∧10 mm³

Given:

Volume = 12m³

Volume = 12m³

But

1m³ = 10∧9 mm³

Then if 1m³ = 10∧9 mm³ we can say

1m³ = 10∧9 mm³

12m³ = X mm³

Where X is the required volume in mm³

( 1m³ × X ) =( 10∧9 mm³ × 12 m³ )

X = 12 × 10∧9 mm³

=1.2 × 10∧10 mm³

Therefore, equivalent volume of 12m³

is 1.2 × 10∧10 mm³

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Answer:

The electron cloud

Explanation:

Rutherford’s gold foil experiment showed that the atom consisted of a tiny nucleus inside of a much larger electron cloud.

The diameter of the electron cloud is about 50 000 times that of the nucleus.

The electron cloud contributes the most to the volume of an atom, as it occupies almost all of the atom's space compared to the much smaller nucleus that contains most of the mass.

To determine whether the nucleus or the electron cloud contributes the most to the volume of an atom, we need to consider the structure of an atom. An atom is made up of a nucleus, containing protons and neutrons, and an electron cloud that contains electrons. While the nucleus contains nearly all of the atom's mass due to the relative mass of protons and neutrons, it's the electron cloud that occupies the majority of an atom's volume. The comparison in size is dramatic: If the nucleus were a blueberry, the atom could be the size of a football stadium, with the empty space being the difference between the two.

The electron cloud, which is where electrons have a significant probability of being found, does not have a definite boundary. Nevertheless, the space that is encompassed within where an electron can be found with 95% probability is used to define an atom's size. Given these facts, the electron cloud contributes far more to an atom's volume than the dense, compact nucleus at the center.