Which best describes homeostasis?

A. altering the external environment to accommodate the body's needs
B. maintaining a relatively stable equilibrium by physiological processes.
C. keeping the body in a fixed and unaltered stated.
D. maintaining a constant internal environment.

The statements that are correct is that electrons are attracted towards higher potential and protons are attracted towards lower potential. So the correct option is d. I & IV

Electrons are particles that are negatively charged so if it is placed in an electric field it will move from negative to positive, due to its negative charge, then it will attract a higher potential.

Protons are particles that are positively charged so if it is placed in an electric field it will move from a positive to a negative side, then due to its positive charge, it will be attracted to a lower potential.

To learn more about electrons visit: https://brainly.com/question/1255220

#SPJ1

If you increase the pressure of the reaction 2A(g) + B(g)C(g) + 2D(g)the reaction will shift forward to the side with little moles of gas.

Le Chatelier's principle states that if pressure is raised, the reaction will favor the direction with a lower number of gas moles.

On this  case, the cleared out side includes a add up to of three gas moles (two moles of A and one mole of B), whereas the correct side covers four gas moles (one mole of C and two moles of D). In this way, the balance will move towards the left-hand side in arrange to diminish the collective gas particles and relieve the rise in weight. The levels of A and B will rise, as the levels of C and D will decrease.

Learn more about pressure from

https://brainly.com/question/28012687

#SPJ1

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

The equilibrium constant, which indicates how far a chemical process progresses, is a thermodynamic quantity.

The equilibrium constant is a ratio of the concentrations (or partial pressures) of the products to the concentrations (or partial pressures) of the reactants.

1) The equilibrium constant is;

Keq = 1/(3.5) * (1.5)^2

Keq = 0.13

2) 0.15 = [0.25]/1 * [CO2]

[CO2] = [0.25]/0.15

[CO2] =1.67

3) Ksp = [Mg^+] [Cl^-]^2

4 * 10^-2 = [Mg^+] *  [3.5 * 10^-3]^2

[Mg^+] = 4 * 10^-2/ [3.5 * 10^-3]^2

= 3.3 * 10^-5 M

4) Ksp = x^2

Ksp = (2 * 10^-3)^2

= 4 * 10^-6

Learn more about equilibrium constant:https://brainly.com/question/10038290

#SPJ1

The term mole concept is used here to determine the mass of sulfur dioxide.The mass of sulfur dioxide obtained from 50.0 g of hydrogen sulphide is 93.93 g.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

Here balanced reaction is:

2H₂S + 3O₂ → 2SO₂ + 2H₂O

n (H₂S) = n(SO₂)

n = 50.0 / 34.1 = 1.466

Molar mass of sulfur dioxide = 64.067 g/mol

Mass = n × M

m = 1.466 × 64.067 = 93.93 g

To know more about mole concept, visit;

https://brainly.com/question/19730733

#SPJ1

Molarity is an important method which is used to calculate the concentration of a solution. The molarity of 0.499 g of NaOH dissolved in 150.00 mL of water is  0.082 M.

Molarity of a solution is defined as the number of moles of the solute present per litre of the solution. The unit of molarity is mol L⁻¹ and it is represented as 'M'.

Molarity = Number of moles of solute / Volume of solution in L

150.00 mL = 0.15 L

Number of moles:

n = 0.499 / 40.00 = 0.0124 moles

M = 0.0124 / 0.15

M = 0.082

To know more about molarity, visit;

https://brainly.com/question/16727614

#SPJ1

A gallon is a common volume measurement unit for measuring liquids and occasionally dry things. 5 gallon is equal to 18.925 L.

Thus, The US liquid gallon, US dry gallon, and Imperial gallon are the three different sorts of gallons. To measure and store commodities like fuel, oil, milk, paint, and many other things, these three types are frequently employed.

The English Parliament created the gallon in 1696 to be used for measuring dry goods. After gaining independence, the US adopted the Winchester gallon, which is now known as the US dry gallon.

Both are now referred to as US liquid gallon and US dry gallon, respectively. On the other hand, the Imperial gallon was adopted by the British Empire in 1834.

Thus, A gallon is a common volume measurement unit for measuring liquids and occasionally dry things. 5 gallon is equal to 18.925 L.

Learn more about Liter, refer to the link:

https://brainly.com/question/25546396

#SPJ1

Answer:

For aluminum + nickel(II) sulfate --> aluminum sulfate + nickel:

Al + NiSO4 --> Al2(SO4)3 + Ni

Using the tally method:

Al: 2

Ni: 1

S: 3

O: 12

The balanced equation is:

2Al + 3Ni(SO4) --> Al2(SO4)3 + 3Ni

For ammonium phosphate + magnesium nitrite --> magnesium phosphate + ammonium nitrite:

(NH4)3PO4 + Mg(NO2)2 --> Mg3(PO4)2 + 6NH4NO2

Using the tally method:

N: 6

H: 28

P: 2

O: 16

Mg: 3

The balanced equation is:

2(NH4)3(PO4) + 3Mg(NO2)2 --> Mg3(PO4)2 + 6(NH4)(NO2)

For lead + nitrogen --> lead(IV) nitride:

3Pb + 2N2 --> Pb3N4

Using the tally method:

Pb: 3

N: 8

The balanced equation is:

3Pb + 2N2 --> Pb3N4

Explanation:

The volume in mL of 0.567 M Ca(OH)₂ needed to neutralize 42.8 mL of 0.490 M H₃PO₄ in a titration is 36.98ml.

A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.

In a reaction to water, neutralization results in excess hydrogen or hydroxide ions present in the solution. The pH of the neutralized solution depends on the strength of the acid or base involved in it.

Given,

Concentration of calcium hydroxide = 0.567M

Volume of phosphoric acid = 42.8 moles

Concentration of phosphoric acid = 0.49M

During neutralization, the number of moles of acid and base remain same,

                                                 M₁V₁ = M₂ V₂

i.e. Moles of acid = moles of base

        0.49 × 42.8 = 0.567 × V₂

                      V₂ = 36.98 ml

Learn more about Neutralization, here:

https://brainly.com/question/15347368

#SPJ1

Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

The solubility product of a sparingly soluble salt is defined as the product of molar concentrations of its ions in a saturated solution of it at a given temperature. The two important factors that affect the solubility product are pressure and temperature.

Using an electrical conductivity measurement, determine the ion concentration in a saturated solution and use this number to compute the solubility product.

Using a colorimetric technique, determine the ion concentration in a saturated solution and use this number to compute the Ksp.

It is the pressure which affects the solubility of gases only.

To know more about solubility product, visit;

https://brainly.com/question/857770

#SPJ1

The partial pressure of the gas in a mixture is the pressure that the gas would exert if present alone in the vessel at the same temperature as that of the mixture. Here the partial pressure of Xe is

The pressure exerted by a mixture of two or more non-reacting gases enclosed in a definite volume is equal to the sum of the partial pressures of the component gases.

According to Dalton's law of partial pressures, total pressure is:

P = p₁ + p₂ + ...

2.10 = 0.250 + 0.300 + p

p = 1.55

Partial pressure of Xe = 1.55

To know more about partial pressure, visit;

https://brainly.com/question/13199169

#SPJ1

The balanced redox reaction is:

6I2 + 42OH- → 6IO3- + 18H2O

We have to note that we can only say that a redox reaction have been balanced when the number of the electrons that were lost in the oxidation half equation is equal to the number of electrons that have been gained in the reduction half equation.

The balanced half reaction equations are;

I2 -→ IO3- + 6e (oxidation half-reaction)

6OH- + 6e- → 2H2O  (reduction half-reaction)

Thus adding the equations would give the balanced reaction equation.

Learn more about redox reaction:https://brainly.com/question/30174869

#SPJ1

Menthol is a substance commonly used in cough drops. It has a molar mass of 156.3 g/mol and is comprised of 77.4% carbon and 12.9% hydrogen and 10.2% oxygen. The molecular formula is C[tex]_{10}[/tex]H[tex]_{20}[/tex]O.

The precise quantity and kind of atoms that make up a single chemical molecule are specified in its molecular formula. A compound's constituent elements are denoted by their chemical symbols, which are followed by numerical subscripts that indicate how many atoms of each constituent are contained in the molecule.

A molecular formula does not have a chemical name and is wordless. A molecular formula may suggest particular simple chemical structures, but it is not the same as a formula for the entire chemical structure. Compared to structural formulas, they are more restrictive.

moles of carbon =0.122/12=0.010

Moles of Hydrogen =0.0204/1=0.0204

moles of oxygen = 0.0171/16 =0.0017

Dividing by simple whole number ratio

The ratio of C : H : O = 10 : 20 : 1. The molecular formula is C[tex]_{10}[/tex]H[tex]_{20}[/tex]O.

To know more about molecular formula, here:

https://brainly.com/question/28647690

#SPJ1

The resultant solution has a molarity of 1 M.

To find the molarity of the resulting solution, calculate the total amount of moles of Kool-Aid and the total volume of the solution.

The moles of Kool-Aid in each cup can be calculated as:

moles = concentration (M) × volume (L)

Cup 1: moles = 0.05 L × 0 M = 0 mol

Cup 2: moles = 0.05 L × 2.5 M = 0.125 mol

Cup 3: moles = 0.05 L × 0.5 M = 0.025 mol

The total amount of moles is:

total moles = moles in cup 1 + moles in cup 2 + moles in cup 3

total moles = 0 mol + 0.125 mol + 0.025 mol

total moles = 0.15 mol

The total volume of the solution is:

total volume = volume in cup 1 + volume in cup 2 + volume in cup 3

total volume = 0.05 L + 0.05 L + 0.05 L

total volume = 0.15 L

Now calculate the molarity of the resulting solution:

molarity = total moles ÷ total volume

molarity = 0.15 mol ÷ 0.15 L

molarity = 1 M

Therefore, the molarity of the resulting solution is 1 M.

Find out more on Kool-Aid here: https://brainly.com/question/27297342

#SPJ1

Answer:

The Correct answer is 15

Answer:

B). 15

Explanation:

Answer:

Please mark me brainliest

Explanation:

The answer is false.

opaque materials do not reflect any light because they absorb or trap all light that comes in contact with them. No light is able to return from within an opaque material or reflect off its inner surface. Opaqueness is defined by a lack of light reflection, transmission or scattering. Light either disappears or is converted into other forms of energy within opaque substances.

Please let me know if this helps explain why opaque materials do not reflect light or if any part of the description is unclear. I can also provide any additional examples or details if needed.

Answer: 19) False. A totally opaque material does not let any light pass through it.

Answer:  46.07 °C.

Explanation:

If liquid carbon disulfide reacts with 4.5x10²ml of oxygen to produce the gases carbon dioxide and sulfur dioxide. 300mL  is the volume of each product is produced.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch.

Volume and length (cubed) have a symbiotic relationship. The volume more a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

CS[tex]_2[/tex] (l) + 3O[tex]_2[/tex] (g) → CO[tex]_2[/tex](g) + 2SO[tex]_2[/tex] (g)

3 moles of oxygen gas form one mole of carbon dioxide

4.50 x 10² mL, or 450. mL

150. mL of CO2 (g)

Since 3 moles of oxygen produce 2 moles of sulfur dioxide,

450. mL×(3/2) =300 mL of SO2 (g).

To know more about volume, here:

brainly.com/question/1578538

#SPJ1

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

Learn more about Ecology  at:

https://brainly.com/question/30429252

#SPJ1

Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

The rate law for the reaction can be written as -

rate= k[C] [D]

The rate of reaction or reaction rate is the speed at which reactants are converted into products.

When we talk about chemical reactions, it is a given fact that rate at which they occur varies by a great deal. Some chemical reactions are nearly instantaneous, while others usually take some time to reach the final equilibrium.

The rate of the reaction is governed by the slow step.

This gives the rate equation-

rate= k[C] [D]

Learn more about Rate of reaction, here:

https://brainly.com/question/30546888

#SPJ1

The number of molecules of silicon dioxide (SiO₂) present in 15 grams of the sample is 1.503×10²³ molecules (3rd option)

We'll begin by obtaining the mole of 15 g of SiO₂. This is shown below:

Mole = mass / molar mass

Mole of SiO₂ = 15 / 60.09

Mole of SiO₂ = 0.2496 mole

Haven obtain the mole, we shall determine the number of molecules. Details below:

From Avogadro's hypothesis,

1 mole of SiO₂ = 6.022×10²³ molecules

Therefore,

0.2496 mole of SiO₂ = 0.25 × 6.022×10²³

0.2496 mole of SiO₂ = 1.503×10²³ molecules

Thus, the number of molecules is 1.503×10²³ molecules (3rd option)

Learn more about number of molecules:

https://brainly.com/question/29046368

#SPJ1

Answer:

Chemistry B Semester Exam 5/4/2023

1. Cs-Br

2. K-C is ionic, and C-O is polar covalent

3. All molecules are in constant motion, so they all have some kinetic energy.

4. The reaction between substances A and B has a lower activation energy than the reaction between substances B and C.

5. More bond energy is absorbed on the reactants side than is released on the products side.

6. an exothermic reaction

7. Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.

8. Heat must be released by the products in order to convert from the reactants.

9. Cooling a purple solution will turn it pink.

10.  Both are flexible, but one conducts electricity while the other insulates.

11. high pressure, high-temperature water extraction

12. steel + vanadium for shock absorption

13. 15

14. the number of atoms, type of elements, and mass of reactants and products are equal.

15. 64 grams

16. 1.503x10^23

17. The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same.

18. The plastic balls are a good representation of neutrons, but there is no splitting of nuclei as happens in fission.

19. beta minus decay

20. alpha decay

21. Greenhouse gases have more than two atoms, allowing them to vibrate and release radiation, warming the atmosphere.

22. cause: acid rain, consequence: destruction of crops

23. toxic bacteria in the water supply

24. it reaches hard to get to oil and gas deposits.

Detergent enzymes are better because they help limit phosphate pollutants in the environment. Option 3.

Phosphates are a common ingredient in traditional laundry detergents, but they can have harmful effects on the environment.

When phosphate-containing detergents are used, the phosphates can end up in waterways and cause excessive algae growth, leading to decreased oxygen levels in the water and harm to aquatic life.

Enzyme-based detergents can be a more environmentally friendly option as they do not contain phosphates, reducing the amount of phosphate pollution released into the environment.

More on detergents can be found here: https://brainly.com/question/20986862

#SPJ1

Answer:

17.4 mols

Explanation:

Use the ideal gas Law: Pv=nRt where P is pressure, V is volume, n is the number of mols, R is the Gas constant (0.08206 L*atm/mol*K), and T is the temperature in Kelvin.

Convert temperature to Kelvin: 43.65 C+273= 316.65 K

Pv=nRt -----> Plug in what is given and Solve the equation for n

7.07 atm*64.01 L= n *(0.08206 L*atm/mol*K)* 316.65 K

n= 17.4 mols

The number of mole of Ba₃(PO₄)₂ you can make from 3.54 L of 0.373 M BaCl₂ is 0.44 mole

First, we shall determine the mole in 3.54 L of 0.373 M BaCl₂. Details below:

Molarity = Mole / Volume

Cross multiply

Mole = molarity × volume

Mole of BaCl₂ = 0.373 × 3.54

Mole of BaCl₂ = 1.32 mole

Finally, we can determine the mole of Ba₃(PO₄)₂ produced. Details below:

3BaCl₂ + 2H₃PO₄ -> Ba₃(PO₄)₂ + 6HCl

From the balanced equation above,

3 moles of BaCl₂ reacted to produce 1 mole of Ba₃(PO₄)₂

Therefore,

1.32 mole of BaCl₂ will react to produce = (1.32  × 1) / 3 = 0.44 mole of Ba₃(PO₄)₂

Thus, the number of mole of Ba₃(PO₄)₂ you can make from the reaction  is 0.44 mole

Learn more about mole produced:

https://brainly.com/question/13375719

#SPJ1

In this reaction 10.8 moles of carbon dioxide was produced. 10.8moles of carbon monoxide used in this reaction to produce such number of moles of carbon dioxide.

In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of very small objects like molecules, atoms, or other predetermined particles. The mole designates 6.02214076 1023 units, which is a very large number.

For the Worldwide System of Units (SI), the mole is defined as this number as of May 20, 2019, according to the General Convention on Measurements and Weights. The total amount of atoms discovered through experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole.

2CO(g)+O[tex]_2[/tex](g)=2CO[tex]_2[/tex](g)

moles of carbon dioxide= 10.8 moles

According to stoichiometry

moles of carbon monoxide=  (2/2)× 10.8 =10.8moles.

To know more about mole, here:

brainly.com/question/31597231

#SPJ1

The compound oxygen difluoride is quite reactive, giving oxygen and HF when treated with water. -126kj is the bond dissociation energy of the O–F bond in OF[tex]_2[/tex].

The amount of energy necessary to homolytically shatter a chemical bond is known as bond dissociation energy. Radical species are often produced by a homolytic fracture. The abbreviations BDE, D0, and DH° are used to denote this energy.

Bond dissociation power is frequently used to gauge a chemical bond's strength as well as for contrasting different bonds. Be aware that the enthalpy change depends on the temperature. Bond dissociation energy is often measured in kJ/mol or kcal/mol.

-318 kJ/mol = BDE for OF[tex]_2[/tex]+ BDE for H[tex]_2[/tex]O - BDE for O[tex]_2[/tex] - 2 x BDE for HF.

Substituting all the values, we get

BDE of O–F bond = -126kj

To know more about Bond dissociation energy, here:

https://brainly.com/question/28952758

#SPJ1