Can someone help me please will give BRAINIEST
Complete the conversions for the following temperature measurements:
55.3C=_____K
255K=_____C
447K=_____C
-14C=_____K

Answer:

C. Helium Atom

Explanation:

Helium has less mass than hydrogen, proton, and electron

Explanation:

what causes Spanish-American War

Answer:

A

Explanation: because it change as so do ur data

Answer:

True

Explanation:

Answer:

wala ako alam sagot sorry

Answer:

A. hydrolysis reaction.

Explanation:

Chemical Reactions.

First, let's review each concept of the group of answer choices:

- hydrolysis: is a reaction in which the net reaction is an organic compound reacting with water to give either two molar equivalents of a single product or more than one product.

- redox: is a type of chemical reaction that involves a transfer of electrons between two species.

- combustion: is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.

- neutralization: is a reaction that occurs when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.

The problem is asking for the reaction that removes a phosphate group from ATP, so let's see the structure of ATP with one phosphate group:

What is enclosed in the red box is the phosphate group.

The reaction that removes this phosphate group represents a rupture of the structure and based on the logic of the definitions of the given concepts, the answer would be that the reaction to remove one phosphate group from ATP is A. hydrolysis reaction. This reaction looks like this:

ATP + water (H2O) -> ADP + Pi,

where ADP is the same molecule of ATP but it has two phosphate groups and Pi is the phosphate group removed.

The average number of molecules adsorbed by the table is the number of different ways of placing a total of r particles on n adsorption sites when two particles can occupy each site given by (r + n-1) C (n-1).

This formula follows from the fact that each placement corresponds to choosing n-1 boundaries that divide the particles into n groups (each group may be empty) and then putting one group into each adsorption site. Thus the required number of ways is(r + n-1) C (n-1). The number of ways of placing r particles on n adsorption sites when one or two particles can occupy each site is the sum of the number of ways in which exactly one particle occupies a site and the number of ways in which two particles occupy a site. Each adsorption site can be either empty, occupied by one molecule, or occupied by two molecules. Therefore, there are three different states that each adsorption site can have. There are n adsorption sites, and therefore there are 3n different states that the table can have. Each state is characterized by the number of molecules adsorbed by the table. Therefore, the average number of molecules adsorbed by the table is given by the sum of the number of molecules adsorbed in each state, divided by the total number of states. The number of molecules adsorbed in each state is the sum of the number of molecules adsorbed by each adsorption site, overall adsorption sites. Therefore, the number of molecules adsorbed in each state is either 0, 1, or 2.

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The cell potential at 25°C for the given cell is +1.16 V. Answer A is correct.

The cell potential can be calculated using the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in kelvin (25°C = 298 K), n is the number of electrons transferred in the balanced half-reactions, F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

First, write the balanced half-reactions:

Fe(s) → Fe2+(aq) + 2 e-

Pd2+(aq) + 2 e- → Pd(s)

The overall reaction is the sum of the half-reactions:

Fe(s) + Pd2+(aq) → Fe2+(aq) + Pd(s)

The standard cell potential is:

E°cell = E°(cathode) - E°(anode) = +0.95 V - (-0.45 V) = +1.40 V

The reaction quotient Q can be calculated using the concentrations of the species involved:

Q = [Fe2+] / [Pd2+]^2

Substitute the values given:

Q = (0.100 M) / (1.0×10^-5 M)^2 = 1.0×10^7

Substitute all the values into the Nernst equation:

Ecell = +1.40 V - (8.314 J/mol·K / (2 × 96,485 C/mol)) × ln(1.0×10^7)

Ecell = +1.16 V

Option A.

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The cell potential at 25°C for the given cell is +1.16 V. Answer A is correct.The cell potential can be calculated using the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in kelvin (25°C = 298 K), n is the number of electrons transferred in the balanced half-reactions, F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.First, write the balanced half-reactions:Fe(s) → Fe2+(aq) + 2 e-Pd2+(aq) + 2 e- → Pd(s)The overall reaction is the sum of the half-reactions:Fe(s) + Pd2+(aq) → Fe2+(aq) + Pd(s)The standard cell potential is:E°cell = E°(cathode) - E°(anode) = +0.95 V - (-0.45 V) = +1.40 VThe reaction quotient Q can be calculated using the concentrations of the species involved:Q = [Fe2+] / [Pd2+]^2Substitute the values given:Q = (0.100 M) / (1.0×10^-5 M)^2 = 1.0×10^7Substitute all the values into the Nernst equation:Ecell = +1.40 V - (8.314 J/mol·K / (2 × 96,485 C/mol)) × ln(1.0×10^7)Ecell = +1.16 VOption A.

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The chemical agent that produces highly reactive hydroxyl-free radicals and decomposes to O2 gas is hydrogen peroxide (H2O2).

Hydrogen peroxide (H2O2) is a chemical compound that consists of two hydrogen atoms bonded to two oxygen atoms. It is known for its ability to decompose into water (H2O) and oxygen gas (O2). This decomposition process is facilitated by the presence of certain catalysts or through exposure to heat, light, or specific enzymes called catalases.

During the decomposition of hydrogen peroxide, highly reactive hydroxyl-free radicals (OH•) are generated as intermediates. These hydroxyl radicals have an unpaired electron, making them extremely reactive and capable of initiating chemical reactions with various organic and inorganic substances.

Hydroxyl radicals are powerful oxidizing agents and can react with a wide range of compounds, including pollutants, toxins, and pathogens. Their reactivity allows them to break down organic molecules, neutralize harmful substances, and contribute to processes like oxidative stress, disinfection, and wound healing.

Overall, hydrogen peroxide serves as a source of both highly reactive hydroxyl radicals and oxygen gas, playing important roles in various chemical and biological processes.

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Answer:

from which chapter is this question

Explanation:

having no strongly marked or positive characteristics or features.

The balanced equation for the oxidation of copper metal to Cu(II) and the reduction of silver ion to silver metal in a voltaic cell can be written as follows:

Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)

In this reaction, copper metal is oxidized to Cu2+ ions, while silver ions are reduced to silver metal. The overall reaction is spontaneous, and the electrons flow from the copper electrode (the anode) to the silver electrode (the cathode), generating an electrical current.

A voltaic cell is an electrochemical cell that converts chemical energy into electrical energy. It consists of two half-cells, each containing a metal electrode and a solution of ions.

The half-cell where oxidation occurs is called the anode, while the half-cell where reduction occurs is called the cathode. The two half-cells are connected by a salt bridge, which allows ions to move between the two solutions while keeping them electrically neutral.

In the case of the Cu-Ag voltaic cell, the anode is the copper electrode, and the cathode is the silver electrode.

Copper atoms at the anode lose electrons and are oxidized to form copper ions, while silver ions at the cathode gain electrons and are reduced to form silver atoms. The flow of electrons from the anode to the cathode generates a current that can be harnessed to do work.

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Answer:

b) 689,000mm

as 1m= 1000mm

Answer:

A

Explanation:

mark me brainlisted please

Answer:

An environment is a local area of living creatures existing related to the nonliving segments of their current circumstance, interfacing as a framework. These biotic and abiotic segments are connected together through supplement cycles and energy streams.

Explanation:

Answer:

Living organisms require a proper, stable ecosystem/envirornment to function

Explanation:

Answer:

OX-Y-Z

Explanation:

its the correct answer

The correct order from the most amount of motion( Kinetic energy) to the least amount of motion is Y (gas), Z (liquid), and X (ice). The correct answer is C, Y-Z-X.

In the given sequence, the states of matter with the most amount of motion (kinetic energy) to the least amount of motion are as follows:

Y - Gas (highest kinetic energy, molecules move freely and quickly in all directions)

Z - Liquid (intermediate kinetic energy, molecules have some freedom of movement but are more closely packed than in a gas)

X - Ice (lowest kinetic energy, molecules are tightly packed and have minimal movement, as it is in a solid state)

This sequence reflects the increasing freedom of movement and mobility of molecules as they transition from a solid to a liquid to a gas state.

Thus, the correct option is C.

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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2.50 g of helium gas at STP would occupy a volume of 14.0 liters.

Standard temperature and pressure (STP) conditions of 0°C and 1 atm, we can use the molar volume of a gas at STP, which is 22.4 L/mol.

1. Helium seems to have a molar mass of 4.00 g/mol.

Therefore, we can calculate the number of moles of helium as:

moles of He = mass of He divided by molar mass of He

= 2.50 g / 4.00 g/mol

= 0.625 mol

Then, we can use the molar volume of a gas at STP to calculate the volume of helium gas:

volume of He = moles of He x molar volume of gas at STP

= 0.625 mol x 22.4 L/mol

= 14.0 L

2.50 g of helium gas at STP would occupy a volume of 14.0 liters.

2. The molar mass of sodium is 22.99 g/mol. Therefore, we can calculate the number of moles of sodium as:

moles of Na = number of atoms of Na divided by Avogadro's number

= 5.0 x 10²⁵ atoms / 6.022 x 10²³ atoms/mol

= 83.0 mol

Then, we can use the molar mass of sodium to calculate the mass of sodium:

mass of Na = moles of Na x molar mass of Na

= 83.0 mol x 22.99 g/mol

= 1900 g

Therefore, 5.0 x 10²⁵ atoms of sodium have a mass of 1900 g.

3. The molar mass of Ni is 58.69 g/mol. Therefore, we can calculate the number of moles of Ni as:

moles of Ni = mass of Ni divided by molar mass of Ni

= 3.95 g / 58.69 g/mol

= 0.0673 mol

Then, we can use Avogadro's number to calculate the number of atoms of Ni:

number of atoms of Ni = moles of Ni x Avogadro's number

= 0.0673 mol x 6.022 x 10²³ atoms/mol

= 4.05 x 10²² atoms

Therefore, 3.95 g of Ni contain 4.05 x 10²² atoms.

4. The molar mass of Xe is 131.29 g/mol. Therefore, we can calculate the number of moles of Xe as:

moles of Xe = mass of Xe divided by molar mass of Xe

= 15 kg / 131.29 g/mol

= 114 mol

Then, we can use Avogadro's number to calculate the number of atoms of Xe:

number of atoms of Xe = moles of Xe x Avogadro's number

= 114 mol x 6.022 x 10^23 atoms/mol

= 6.87 x10²⁵ atoms

Therefore, a 15 kg sample of Xe gas contains 6.87 x 10²⁵ atoms.

5. A gas's molar volume at STP is 22.4 L/mol. Therefore, we can calculate the number of moles of Ar as:

moles of Ar = number of atoms of Ar divided by Avogadro's number

= 45,000,000 atoms / 6.022 x 10²³ atoms/mol

= 7.47 x 10⁻¹⁷ mol

Then, we can use the molar volume of a gas at STP to calculate the volume of Ar gas:

volume of Ar = moles of Ar x molar volume of gas at STP

= 7.47 x 10⁻¹⁷ mol x 22.4 L/mol

= 1.67 x  10⁻¹⁵ L

Therefore, 45,000,000 atoms of Ar would occupy a volume of 1.67 x 10⁻¹⁵ liters at STP.

6. The molar mass of CO₂ is 44.01 g/mol. Therefore, we can calculate the number of moles of CO₂ as:

moles of CO₂ = mass of CO₂ divided by molar mass of CO₂

= 75 g / 44.01 g/mol

= 1.70 mol

Then, we can use Avogadro's number to calculate the number of atoms of CO₂:

number of atoms of CO₂ = moles of CO₂ x Avogadro's number

= 1.70 mol x 6.022 x 10²³ atoms/mol

= 1.02 x 10²⁴ atoms

Therefore, a 75 g sample of CO₂ contains 1.02 x 10²⁴ atoms.

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Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

The states of matter are the different forms of the matter in which it can exist. They are solids, liquids and gases. Solids are the states of matter in which molecules are very near to each other. They have fixed shape and volume. Liquids is the states of matter in which molecules are a little far from each other. They have different shape and fixed volume. Gas is the states of matter in which molecules are a very far from each other. They have different shape and different volume.

There are two more states of matter which are called as Plasma, Bose Einstein Condensate.

Plasma have highest energy and Bose Einstein Condensate have lowest energy.

Therefore, Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

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The number of the sigma and the pi bonds are in an ethyne molecule is the three sigma bonds and the two pi bonds.

The ethyne molecule is as follows :

H - C ≡ C - H

In the ethyne molecule the total number of the  sigma bonds is three and the total number of the pi bond is two.  The sigma bond is stronger than the pi bond because of the  greater extent of the overlapping.

The ethyne molecule is the unsaturated hydrocarbon in the alkyne group. The alkyne group of the hydrocarbon contains the carbon carbon triple bonds.

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Answer:

a

c

t

a

t

g

a

a

g

Explanation:

The predicted volume of gas at 50 ºC is 0.53L.

The predicted volume of gas at 100 ºC is 0.61 L.

The predicted volume of gas at 150 ºC is 0.70 L.

Charles's law states that pressure remains constant, and the volume of gas is directly proportional to its temperature.

V  ∝ T

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)                                                          ..................(1)

Given, the initial temperature of the gas, T₁ = 0 ºC = 273 K

The final temperature of the gas, T₂ = 50 ºC = 50 + 273 = 323 K

The initial volume of gas, V₁ = 0.45 L

\(\frac{0.45 }{273} =\frac{V_f}{323}\)

\(V_f =\frac{0.45\times 323 }{273} =0.53 L\)

The initial temperature of the gas, T₁ = 0 ºC = 273 K

The final temperature of the gas, T₂ = 100 ºC = 100 + 273 = 373 K

The initial volume of gas, V₁ = 0.45 L

\(\frac{0.45 }{273} =\frac{V_f}{373}\)

\(V_f =\frac{0.45\times 373 }{273} =0.61 L\)

The initial temperature of the gas, T₁ = 0 ºC = 273 K

The final temperature of the gas, T₂ = 150 ºC = 150 + 273 = 423 K

The initial volume of gas, V₁ = 0.45 L

\(\frac{0.45 }{273} =\frac{V_f}{423}\)

\(V_f =\frac{0.45\times 423}{273} =0.70 L\)

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Answer:

37,818.67 m3

Explanation:

The pressure a gas will exert on a container is inversely proportional to the volume of the gas. According to Boyle's law, at a constant temperature, the pressure of a gas is inversely proportional to its volume. The law can be mathematically represented thus:

   P1V1 = P2V2

In this case, P1 = 101.3 kPa, V1 = 28,000 m3, P2 = 75 kPa, V2 = ?

V2 = P1V1/P2

         =    101.3 x 28,000/75

                = 37,818.67 m3

Hence, the new volume of the air inside the cabin after pressurizing would be 37,818.67 m3.

Answer:

Because dipole - dipole force is stronger than london dispersion force

Explanation:

Intermolecular forces determines a wide range of physical properties of matter of which melting point is one of them.

Both london dispersion forces and dipole- dipole forces are vanderwaals force.

But diople - dipole forces exists between polar molecules which are molecules with permanent dipoles.

In london dispersion forces the dipole is temporary

Approximately 4.02 moles of sodium peroxide is needed per sailor in a 24-hour period to remove the CO₂ exhaled.

To determine the amount of sodium peroxide needed per sailor in a 24-hour period, we need to first calculate the amount of CO₂ exhaled by the sailor in that time frame. The sailor exhales 150.0 mL of CO₂ per minute, we can calculate the total volume of CO₂ exhaled in 24 hours by using the following formula:
Total volume of CO₂ exhaled = volume exhaled per minute * number of minutes in 24 hours
= 150.0 mL/min * 1440 minutes
= 216,000 mL

Next, we need to convert the volume of CO₂ exhaled to moles using the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, T is the temperature. The pressure is 1.02 atm and the temperature is 20°C (which needs to be converted to Kelvin by adding 273.15), we can calculate the number of moles of CO₂ using the following formula:
n = PV / RT
= (1.02 atm) * (216,000 mL / 1000 mL/L) / [(0.0821 L * atm / mol * K) * (20°C + 273.15 K)]
= 8.04 moles

Now, looking at the balanced chemical equation, we can see that 2 moles of Na₂O₂ react with 2 moles of CO₂. This means that for every mole of CO₂, we need 1 mole of Na₂O₂. Therefore, to identify the amount of sodium peroxide needed per sailor in a 24-hour period, we can use the following formula:
Amount of Na₂O₂ = (number of moles of CO₂) / 2
= 8.04 moles / 2
= 4.02 moles

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Here is the sorted list:

Activators:

- Insulin

- Protein phosphatase 1

Inhibitors:

- Epinephrine

- Glycogen synthase kinase 3

- Protein kinase A (PKA)

- Glucagon

Insulin is a hormone produced by the pancreas that plays a crucial role in regulating blood sugar levels. It allows cells in the body to take in glucose (sugar) from the bloodstream and use it as a source of energy. Insulin also helps store excess glucose in the liver for later use.

In individuals with diabetes, the production or effectiveness of insulin is impaired, leading to high blood sugar levels. There are two main types of diabetes:

1. Type 1 diabetes: This occurs when the pancreas fails to produce enough insulin. It is typically diagnosed in childhood or early adulthood and requires lifelong insulin therapy.

2. Type 2 diabetes: In this condition, the body either doesn't produce enough insulin or becomes resistant to its effects. It is often associated with lifestyle factors such as obesity, physical inactivity, and poor diet. Initially, type 2 diabetes can often be managed through lifestyle changes, such as diet and exercise, but some individuals may eventually require insulin or other medications to control their blood sugar levels.

Insulin can be administered through injections using syringes, insulin pens, or insulin pumps. The dosage and frequency of insulin administration depend on various factors, including the individual's blood sugar levels, lifestyle, and type of diabetes. Insulin types can vary in their onset, peak action, and duration, allowing for different treatment regimens tailored to each person's needs.

It's important for individuals with diabetes to monitor their blood sugar levels regularly, follow their healthcare provider's recommendations for insulin dosage and administration, and make necessary lifestyle adjustments to manage their condition effectively.

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A large net force of 280N  is required to accelerate a 2000 kg suv from rest with an acceleration of 0.14m/s2 .

According to Newton’s 2nd law of motion,  force is  equal to the change in momentum per change in time.Acceleration of an object depends on the mass of the object and the amount of force applied.

            Force=mass* acceleration

Here, mass is equal to 2000 kg and acceleration is equals to 0.14m/s/s.putting these values,

      F= ma

     F= 2000kg * 0.14 m/s2

        = 280 kg m/s2

        =280N

So, 280N of force is required.

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Answer:

1.76g of N

Explanation:

5.04g x 1mol/16mol x 2mol/5mol x 14.01g/1mol = 1.76g

The amount of liquid or volume is measured based on the unit 120ml .The unit of measurement ml stands for milliliter, which is a unit of volume. In this case, 120ml indicates the amount of liquid being measured. It is commonly used to measure small amounts of liquid such as medicine, cooking ingredients, or laboratory solutions.

The unit of measurement ml is a metric system unit of volume that is commonly used to measure small amounts of liquid. It is equivalent to one-thousandth of a liter or one cubic centimeter. In this case, 120ml indicates the amount of liquid being measured. This unit of measurement is used in various settings such as cooking, medicine, laboratory, and manufacturing.For instance, in cooking, ml is used to measure small amounts of ingredients such as spices, flavorings, and liquids. It is essential to follow the recipe precisely to get the desired outcome. In medicine, ml is used to measure the dosage of liquid medication prescribed by the doctor or pharmacist. Patients are advised to take the medication as directed to avoid overdosing or underdosing.

In the laboratory, ml is used to measure small amounts of liquids used in experiments or research. Scientists and researchers use precise measurements to get accurate results and avoid errors. In manufacturing, ml is used to measure the amount of liquid ingredients used in the production of various products such as cosmetics, cleaning agents, and beverages.In summary, the unit of measurement ml is used to measure small amounts of liquid, and in this case, it indicates the amount of liquid being measured, which is 120ml  . When you see a measurement with the unit "ml," it's typically referring to the volume of a liquid substance. Milliliters are part of the metric system, which is used worldwide for measuring various quantities. In your example, 120ml is the volume being measured, and it could represent the amount of a liquid such as water, juice, or a chemical solution.

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Answer:

Boron and/or Polonium

Explanation:

In the periodic table, you can see a stair-stepped line starting at Boron (B), atomic number 5, and going all the way down to Polonium (Po), atomic number 84. Except for Germanium (Ge) and Antimony (Sb), all the elements to the left of that line can be classified as metals.

Answer:

Thomson's results showed that atoms contain smaller particles, so Dalton's theory had to be modified. Rutherford's results showed that most of an atom is empty space and that the mass is concentrated in the center of the atom.

Explanation:

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Answer: B: Polarity

Explanation: