What happens to the electrical potential of te refernece electrode as ph changes?

Answer:

A. They can store and process data to make accurate weather predictions.

Explanation:

Evidentially its very accurate and useful in Science like making accurate Weather predictions.

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When cobalt(II) carbonate dissolves in water, the equilibrium concentrations of cobalt(II) and carbonate ions are low, and the solubility of cobalt(II) carbonate in water is low as well. Thus, the correct option is c in both cases.

Cobalt(II) carbonate is a chemical compound that is light pink in color. Cobalt(II) carbonate's chemical formula is CoCO₃. When exposed to air, this compound can be oxidized to form cobalt(II) oxide (CoO) and carbon dioxide (CO₂).

In an aqueous solution, cobalt(II) carbonate is slightly soluble. Cobalt(II) carbonate is one of the most important cobalt salts, and it is used in various applications including the manufacture of porcelain, in coloring glass, in electroplating, and as a catalyst.

If cobalt(II) carbonate is dissolved in water, the equilibrium concentrations of cobalt(II) and carbonate ions are low. This means that cobalt(II) carbonate is not very soluble in water, and very little of it dissociates into its component ions in water.

In other words, the amount of cobalt(II) and carbonate ions present in the water when cobalt(II) carbonate is dissolved is low.

On the other hand, the solubility of cobalt(II) carbonate in water is low as well. This means that only a small amount of cobalt(II) carbonate dissolves in water. Therefore, cobalt(II) carbonate is not very soluble in water. Thus, the correct option is c in both cases.

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Answer:

Marie Curie, née Maria Salomea Skłodowska, (born November 7, 1867, Warsaw, Congress Kingdom of Poland, Russian Empire—died July 4, 1934, near Sallanches, France), Polish-born French physicist, famous for her work on radioactivity and twice a winner of the Nobel Prize.

Explanation:

pls give brainlest almost lvled up.

Answer:

Marie Curie is the one who earned the nobel prize twice for her work with radioactivity

The heat transferred to the gas equals the total of the change in thermal energy and the work done on the gas, according to the first law of thermodynamics. During an isochoric process the work is zero. In process with a constant pressure with increasing temperature some energy leaves the system as work.

The heat provided to a gas (Q) equals the change in thermal energy (U) plus the work performed by the gas (W), as stated by the first law of thermodynamics. During an isochoric (constant volume) process, the work done by the gas is zero (W = 0) because there is no change in volume. In this case, all the heat energy transferred to the gas increases its thermal energy, resulting in a larger temperature increase and a larger molar specific heat at constant volume.

In a process with a constant pressure (isobaric), the gas can expand and do work against the external pressure. As the gas expands, it does work by pushing against the external pressure, and some of the heat energy is used to perform this work. Therefore, less heat energy is available to solely increase the thermal energy of the gas. This results in a smaller temperature increase compared to the constant volume process, leading to a smaller molar specific heat at constant pressure.

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The most appropriate reagent for the conversion of 2-hexanol to 2-hexanone is a oxidizing agent such as sodium dichromate (Na2Cr2O7) or potassium permanganate (KMnO4).

Oxidation of alcohols to carbonyl compounds (such as ketones) can be achieved using oxidizing agents like sodium dichromate or potassium permanganate. In this case, 2-hexanol can be oxidized to 2-hexanone using either of these reagents.

PCC is a mild oxidizing agent that selectively oxidizes primary alcohols to aldehydes and secondary alcohols to ketones without over-oxidizing them. In this case, 2-hexanol is a secondary alcohol, and using PCC will result in the formation of 2-hexanone.
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Answer:

See explanation

Explanation:

The most important thing to bear in mind when writing chemical reaction equation is that the equation must be balanced. A balanced chemical reaction equation is one in which the number of atoms of each element on the left and right hand sides of the reaction equation is exactly the same.

Equation of magnesium reaction with oxygen

2Mg(s) + O2(g) ------> 2MgO(s)

Equation of magnesium reaction with nitrogen

3Mg(s) + N2(g) ------> Mg3N2(s)

Boyle stated that acids taste sour, are corrosive to metals, change the color of litmus to red, and become less acidic when mixed with bases. Acids are substances that release hydrogen ions when dissolved in water.

The sour taste of acids is due to the presence of hydrogen ions. When acids come in contact with metals, they corrode them by reacting with the metal to form metal salts and hydrogen gas. Litmus is a natural dye that is used to indicate the acidity or basicity of a substance. Acids turn litmus paper red, while bases turn it blue. When acids are mixed with bases, they neutralize each other, and the resulting solution becomes less acidic.
Boyle stated that acids taste sour, are corrosive to metals, change the color of litmus to red, and become less acidic when mixed with bases. Acids are compounds that release hydrogen ions (H+) when dissolved in water, and litmus is an indicator that changes color based on the acidity or basicity of a solution. Mixing an acid with a base results in a neutralization reaction, producing water and a salt, thereby reducing the acidic properties.

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Insects have two pairs of wings, while bats and birds each have one pair. Insect wings lack bones, but bird and bat wings have them. Butterfly wings are covered in scales, bird wings in feathers, and bat wings with bare skin. All of these organisms have adapted to life in the air and in doing so have evolved wings.

Insects have two pairs of wings, while bats and birds each have one pair. Insect wings lack bones, but bird and bat wings have them. Butterfly wings are covered in scales, bird wings in feathers, and bat wings with bare skin. All of these organisms have adapted to life in the air and in doing so have evolved wings.

Question :

Where do most fungi thrive ?

Answer :

Fungi are found all around the world and grow in a wide range of habitats, including deserts. Most grow on land (terrestrial) environments, but several species live only in aquatic habitats. Most fungi live in either soil or dead matter, and many are symbionts of plants, animals, or other fungi.

Source :

CK-12 , Edgenuity2020

Answer:

volume

Explanation:

The concept of half-life is commonly used in the field of nuclear physics and chemistry to describe the time it takes for a substance to decay by half. The first half-life refers to the amount of time it takes for half of the original amount of a substance to decay.

a) To determine the first half-life, we need to find the time it takes for the concentration of A to decrease to half of its initial value. Using the first entry on the table as the initial concentration ([A]0 = 0.2673 M), we can calculate the half-life as follows:

0.2673 M → 0.13365 M (half of [A]0) after t = t1/2

0.13365 M / 0.2673 M = 0.5

ln (0.5) = -0.693 = -kt1/2

t1/2 = 0.693/k

Using the data from the table, we can calculate t1/2 as follows:

t1/2 = 0.693/k = (5.76 - 4.80) min = 0.96 min

Therefore, the first half-life is 0.96 minutes.

b) The rate constant of the reaction can be calculated using the integrated rate law for a first-order reaction:

ln ([A]t/[A]0) = -kt

Rearranging this equation gives:

k = -ln ([A]t/[A]0) / t

Using the data from the table, we can calculate the rate constant for the reaction as follows:

k = -ln ([A]t/[A]0) / t = -ln (0.13365/0.2673) / 0.96 min

k = 0.72202 min^-1 (ignore units)

Therefore, the rate constant of the reaction is 0.72202 min^-1.

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Extensive property is dependent on mass. Intensive property is property that depends only on the type of matter rather than the amount. Hense, Volume is an example of Extensive property and Density is an example of Intensive property.

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The given problems are related to isotopes for 1 st solution it is ¹²O isotope with 8 protons and electrons and for ³He there are 1 neutron ,2 electron and mass number is 3.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable

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The Cationic molecular ions are more abundant than Anionic molecular ions because capacity of cationic to stabilise unpaired electrons make synthesis of cationic molecular ions less energetically demanding.

The capacity of cationic molecular ions to stabilise unpaired electrons makes the synthesis of cationic molecular ions less energetically demanding. The most advantageous reason for the abundance of cationic molecular ions is that the cosmic ray has so much energy that it is largely unaffected by the comparatively little energy necessary to ionise molecules. There is ample of radiation from a broadband source like the Sun to drive the molecules to high energy states from which they can be triggered and spontaneously emit. As a result, cationic molecular ions outnumber anionic ones.

Because of the low temperature and density of interstellar space, the most prevalent cationic molecular ion is H3+. Because its two electrons are sole valence electrons in the system, this H3+ is also thought to be a major source of cationic molecular ions.

Another reason for their prevalence is their capacity to stabilise unpaired electrons, which makes the production of cationic molecule ions less energetically demanding.

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When a solid dissolves in a liquid to form a solution, solid particles become evenly dispersed among liquid particles.

Solutions are formed when a solute particle dissolves in another substance known as a solvent.

Usually, solutions are formed when solids dissolve in liquids.

The solid is the solute while the liquid is the solvent.

When a solid dissolves in a liquid, solid particles become evenly dispersed among liquid particles.

Therefore, solutions are formed when solute particles dissolve in solvents.

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Answer:

c

Explanation:

chem ed 2022

To establish a metal block's specific heat capacity. Verify that the power supply has been switched off.

To establish a metal block's specific heat capacity. Verify that the power supply has been switched off. Insert the immersion heater through the block's top-center hole. To ensure that the thermometer is enclosed by an excellent conducting medium, insert the thermometer through the smaller hole then add a few drops of oil to the hole. To establish a metal block's specific heat capacity. Verify that the power supply has been switched off.

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KMnO4; NaMnO4; LiMnO4

FeO ; FeCl2; FeS ; FeSO4

HBrO3; KBrO3; NaBrO3; LiBrO3

PbO2; PbS2; Pb(SO4)2; Pb(CO3)2

Ionic compounds are made up of charged particles called ions, which are created when an atom (or group of atoms) gains or loses an electron. An ion is classified as either positively or negatively charged depending on its charge.

Chemical formulas for compounds that simply specify the proportions of the elements they contain rather than the exact number or arrangement of atoms are known as empirical formulas. The element in the compound with the lowest whole number ratio would be this one.

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A zwitterion is a neutral molecule with both positive and negative charges. Amino acids in their zwitterionic form have protonated amino groups and deprotonated carboxyl groups, allowing them to maintain a balanced, neutral charge under physiological pH conditions.

A zwitterion is a molecule that possesses both positive and negative charges, yet maintains an overall neutral charge. In the context of amino acids, a zwitterionic form occurs when the amino group \((NH_2)\) and the carboxyl group \((COOH)\) within the amino acid structure ionize.

An amino acid in its zwitterionic form has a protonated amino group \((NH_3^+)\) and a deprotonated carboxyl group \((COO^-)\). The positively charged amino group and the negatively charged carboxyl group balance each other, resulting in a net charge of zero for the entire molecule.

This zwitterionic state is commonly found in amino acids under physiological pH conditions (around 7.4) because it provides stability for the amino acid molecules. At different pH levels, the ionization state of the amino and carboxyl groups may change, causing the molecule to lose its zwitterionic properties.

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The Dominican Republic rain forest is the location that has the best climate to promote chemical weathering.

Chemical weathering occurs when the minerals that compose rocks are altered through chemical reactions that happen when they come into contact with water and air. This process happens much faster in locations where the climate is hot and wet. This is because the combination of heat and water can break down the minerals in rocks more quickly than in colder, drier locations.

Locations such as the Dominican Republic rainforest, which are characterized by high temperatures and high humidity, are ideal for chemical weathering. This is because the combination of heat and moisture accelerates chemical reactions, which break down minerals in rocks. Hence, the Dominican Republic rainforest is the location that has the best climate to promote chemical weathering.

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i think its C not so sure rho

good ,uck!!!!

Based on the data given, the correct rate law of the sample reaction is: C. \(R = K[A]^2[B]^1[C]^0\)

Rate law can be defined as a chemical equation that is typically used to relate the initial (forward) chemical reaction rate with respect to the concentrations or pressures of the chemical reactants and constant parameters.

Mathematically, the rate law is given by this formula:

\(R = K[A]^x[B]^y[C]^z\)

Where:

Based on the data given, the correct rate law of the sample reaction is as follows:

\(R = K[A]^2[B]^1[C]^0\)

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Answer:

here you are

Explanation:

Fertile soil has the following characteristics: It is rich in nutrients necessary for basic plant nourishment. This includes nitrogen, phosphorus and potassium. It consists of adequate minerals such as boron, chlorine, cobalt, copper, iron, manganese, magnesium, molybdenum, sulphur and zinc.

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Answer:

88,88 % de O y 11,11 % de H

Explanation:

La composición porcentual se define como la masa que hay de cada mol de átomo en 100g. Las moles de agua en 100g son:

Masa molar agua:

2H = 2*1g/mol = 2g/mol

1O = 1*16g/mol = 16g/mol

Masa molar = 2 + 16 = 18g/mol

100g H2O * (1mol / 18g) = 5.556 moles H2O.

Moles de hidrógeno:

5.556 moles H2O * (2mol H / 1mol H2O) = 11.11 moles H

Moles Oxígeno = Moles H2O = 5.556 moles

La masa de hidrógeno es:

11.11mol * (1g/mol) 11.11g H

La masa de oxígeno es:

5.556 mol * (16g / 1mol) = 88.89g O

Así, el porcentaje de O es 88.89% y el de H es 11.11%. La opción correcta es:

Answer:

A. 1,4-dimethylbenzene

Explanation:

The compound CH,CH;CH,CH3 is a benzene derivative with two methyl groups attached to the benzene ring. The positions of the methyl groups on the ring are indicated by the numbers 1 and 4, which correspond to the carbon atoms at the end of the two double bonds in the benzene ring. This compound is therefore 1,4-dimethylbenzene. The other options listed are not correct because they contain the wrong number or type of substituents on the benzene ring.

Answer:

8 valence electrons

Explanation:

Neon is a noble gas, and all noble gases have 8 valence electrons. The same goes for its group; all elements in the last group of the periodic table have a full valence shell--8 electrons.

Answer: Anaphylaxis

Explanation:

I have a nut allergy, and this has happened to me once. The doctors also told me a lot about anaphylaxis, and I like to learn about myself.

I hope this helps!! :)

Answer:

i believe it's D

Explanation:

Answer:

D

Explanation:

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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