When aqueous solutions of silver(I) nitrate and potassium phosphate are combined, solid silver(I) phosphate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:

The pure form of an atom present in a sample is called the element. No, elements are not always the product of the decomposition reaction.

Decomposition is a chemical reaction in which the compound or the molecule breaks to produce two or more products. The general reaction can be given as,

\(\rm XY \rightarrow X+ Y\)

And,

\(\rm compound \rightarrow element + element\)

The splitting of metal hydroxide into the water and metal oxide is an example of a decomposition reaction. Elements can be found in the free state.

Therefore, the statement is incorrect.

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Reactions with negative reaction free energies occur spontaneously and rapidly, the given statement is false because it is essential to understand that spontaneity and reaction rate are two different aspects of a chemical reaction.

A reaction with negative reaction free energy (also known as Gibbs free energy) indicates that the reaction is spontaneous, the Gibbs free energy (ΔG) is a thermodynamic quantity that helps predict whether a reaction will occur spontaneously. If ΔG is negative, the reaction is thermodynamically favored and occurs spontaneously. However, this does not necessarily mean that the reaction will happen rapidly. The reaction rate depends on the activation energy (Ea), which is the minimum energy required to initiate a chemical reaction.

A reaction with high activation energy will proceed slowly because it needs a higher input of energy to overcome the energy barrier, even if the reaction is spontaneous. Therefore, it the given statements is false, to assume that reactions with negative reaction free energies always occur rapidly. While negative reaction free energies indicate spontaneity, the reaction rate is determined by factors such as activation energy, temperature, and concentration of reactants.

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Answer:

kkajqjjqjqjnqnqnqjqjq

The concentration of the solution in g per dm cube is 35.24 g/dm cube.

The amount of sand in grams is 0.2 g and the volume of the solution is two-thirds of a litre. We have to find the concentration of the solution in g per dm cube.To find the concentration of the solution in g per dm cube, we need to know the concentration of ethanol. As the concentration of ethanol is not given in the question, let us assume the concentration of ethanol is 100%. Therefore, the volume of ethanol in the solution is

(1 - 2/3) litres= 1/3 litres= 1000/3 mL.

As the density of ethanol is 0.789 g/mL,

the mass of ethanol in the solution is:

0.789 g/mL × 1000/3 mL= 789/3 g

The mass of the solution is:

789/3 g + 0.2 g= 2367/9 g

The volume of the solution in dm cube is:

2/3 L= 0.67 dm cube

The concentration of the solution in g per dm cube is: (2367/9 g)/(0.67 dm cube)≈ 35.24 g/dm cube.

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The claim that scientific knowledge is based on observation and inference is that science is always about  empirical evidence , and when making observations , we can get some evidences and inference which serves a conclusion gotten on basis of evidence and reasoning.

Science knowledge serves as the knowledge that is based and focus on  empirical evidence.

It should be noted that in  Science disciplines  their is sharing of common rules of evidence  which is needed in  evaluation of  explanations about natural systems.

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Answer:

A

Explanation:

it has 7 valence electrons and 4 electron shells.

Answer: radiation

Explanation: im not sure so dont take my word fot it

Answer:

ya tu sabes cómo se los aseguro

Answer: Non living things are inanimate objects or forces with the ability to influenceshape alter a habitatand impact its life.

Explanation:

Some examples of nonliving things include rocks water weather climate and natural events such as rockfalls or earthquakes.

The Lewis dot diagram for oxygen consists of 2 paired and 2 unpaired electrons.

A Lewis dot diagram is a diagram that represents the valence electrons in an atom. The valence electrons are the electrons present in the outermost energy level of an atom.Lewis dot diagrams are also referred to as electron dot diagrams or Lewis structures. They are named after Gilbert N. Lewis, who is credited with their invention.

The following is the Lewis dot diagram for oxygen:

In this diagram, the oxygen atom is represented by the letter O.

The two dots represent the two electrons in the first energy level, while the two pairs of dots represent the two lone pairs in the second energy level.

The two unpaired electrons are represented by the two half-dots. These electrons are in the second energy level and are not part of a lone pair.

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Miso is a fermented Japanese condiment made primarily from rice, which is salted and fermented with ground soy for two months. The correct answer is (e)

Miso is a fermented Japanese condiment primarily made from ground soybeans and rice. The soybeans and rice are combined and fermented with the help of a specific mold called Aspergillus oryzae. This mold is responsible for the fermentation process that breaks down the proteins and carbohydrates in the soy and rice, leading to the development of the unique flavors and aromas of miso. Cabbage is not the primary ingredient in miso. Rice alone is not the main component. The bacteria mentioned, Bacillus, is not typically associated with miso fermentation. Hence The correct option is (e)

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The trend for the ionic radius as the atomic number increases in Period 2 is that it decreases.

In general, the ionic radius of an element is the distance between the nucleus and the outermost stable electron shell of an atom or ion. As the atomic number increases, the number of protons in the nucleus also increases, which creates a greater positively charged force (the positively charged protons) pulling the electrons closer to the nucleus. This causes the radius of the outermost stable electron shell to decrease, and therefore the ionic radius also decreases.

In Period 2, the atomic number increases from Z = 3 (Lithium) to Z = 10 (Neon). The ionic radius of Li+ is 0.76 Å and the ionic radius of Ne2+ is 0.43 Å, Therefore, the ionic radius decreases as the atomic number increases within Period 2.

4) The temperature went up by 3 degrees

5) The reaction is exothermic

6) The burning of hydrocarbons is an exothermic reaction

One of the characteristics of a chemical change is that there could be a change in the temperature of the system. The temperature of the system could be found to have been increased or decreased as the case may be.

In any case, the change in the temperature of the system is what is going to tell is whether the reaction was exothermic or endothermic. If the reaction is endothermic, there is going to be a drop in temperature but if the reaction is exothermic, there is going to be an increase in temperature.

Now we can see from the table that the temperature is increasing by a factor of about three degrees so we can say that the reaction is exothermic.

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Answer:

It's c

Explanation:

Because I've checked

The substances that open the lungs' airways are called bronchodilators.

Bronchodilators are a class of medication used to treat respiratory diseases such as asthma, chronic obstructive pulmonary disease (COPD), and bronchitis.

They function by relaxing and widening the air passages of the lungs, making it easier to breathe.

A variety of bronchodilators are available. Inhalers, nebulizers, tablets, and syrups are examples of them.

Bronchodilators come in a variety of forms, and their effects vary depending on the form.

For example, nebulized bronchodilators, which are inhaled in the form of a mist, work quickly and are used to treat severe respiratory distress.

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Answer:  I say its Segmented body  and radial symmetry im not sure if it is right

Explanation:

Answer:

B. Nervous system

D. Segmented body

E. Open circulatory system

Explanation:

Hope this helps!

Have a nice dayy! :)

Answer:

cactus

Explanation:

Its a plant so it makes it own food

Answer:

PLZ FOLLOWING ME.........................

Answer:

Single replacement

Explanation: Al is replacing Cu

The photons have been calculated to contain about 4.97 * 10^-47 J/mol of energy.

We know that a photon is a unit of light. Better put, we can see the photon as a bundle of light and we are able to obtain the energy of that bundle of light as we can see.

Given that;

E = hf

E = energy of the photon

h = Plank's constant

f = frequency of the photon

Then

E = 6.6 * 10^-34 Js * 4.53 x 10^10 s-1

E =  2.99 * 10^-23 J

A mole would have to contain about 6.02 * 10^23 molecules so;

Energy per mole =  2.99 * 10^-23/6.02 * 10^23

= 4.97 * 10^-47 J/mol

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Missing parts;

How much energy, in joules per mole (J/mol), does a photon in the microwave region of the EM

spectrum, contain? Assume the microwave has a frequency of 4.53 x 1010 s-1. Your answer should

have 3 significant figures.

Answer:

2-ethly-3-5 dimethylheptam

Explanation:

trust meeeeee

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding.

The properties that are common to each of the following chemical families include:

(a) Alkali metals The alkali metals have a single valence electron in their outermost shell, which is easily lost to form an ion with a charge of +1. They are the most reactive metals, reacting with water and air to produce hydrogen gas and an oxide layer, respectively. They are silvery-white and have a soft texture.

(b) Alkaline earth metals The alkaline earth metals have two valence electrons in their outermost shell, which they readily lose to form ions with a charge of +2. They are less reactive than the alkali metals, but they still react with oxygen to form an oxide layer on their surface. They are also silvery-white in color and have a harder texture than the alkali metals.

(c) Halogens The halogens have seven valence electrons in their outermost shell, making them highly reactive nonmetals. They readily form ions with a charge of -1 by gaining an electron. They are diatomic molecules at room temperature and can be found in a variety of colors and states of matter.

(d) Noble gases The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding. These properties are common to each of the following chemical families.

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Answer:

salt is a naturally occurring substance on earth and does not contain any compounds that react poorly to carbon based life.

The colors of the visible spectrum are in order from the highest to lowest energy which is : Violet Indigo Blue Green Yellow Orange and Red.

Red light has the lowest energy since it has the longest visible light wavelength. The highest energy visible light is violet since it has the shortest wavelength. The visible light spectrum has energies ranging from red to violet, and the human brain perceives these energy as different hues. Violet has the highest energy whereas red has the lowest. Red light, which has the lowest visible light frequency, has the least energy. The order spectrum reveals frequency content, just like the power spectrum does.

However, the order spectrum offers extra information about harmonically connected rotating machinery systems. Orders are frequency multiples of the reference velocity that are specific.

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Answer:

D. light energy nuclear energy chemical potential energy

Explanation:

Energy transformation that takes place in plants when they change sun solar energy into plant glucose, is :

Light energy (by sunlight) to nuclear energy , chemical potential energy (glucon energy in plant cell - used by plants to make food).

Answer:D, 41.66

Explanation:subtract 33 from 100 to get 66 then multiply the percentages with the amu

The average atomic mass of element X is equal to 41.66 amu. Therefore, option D is correct.

Natural abundance can be defined as the abundance of isotopes of an element that is naturally found on a planet. The atomic mass of these isotopes can be defined as the atomic weight of the chemical element in the modern periodic table.

The abundance of an isotope varies from planet to planet but remains constant at a particular time. The natural abundance can be affected by the probability of its formation in nucleosynthesis.

Given, the mass of the first isotope = 44.009 amu, natural isotope = 33 %

The mass of the second isotope = 40.5 amu, relative abundance = 67 %.

Average atomic mass =  44.009 × 0.33 + 40.5 × 0.67

Average atomic mass = 14.52 + 27.14 = 41.66 amu

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The layer of the imaging plate that traps electrons during exposure is the photostimulable phosphor layer.

An imaging plate is a reusable imaging medium that replaces photographic films in computed radiography (CR).

They are particularly useful in industrial radiography since they can be used to detect and analyze a range of defects or flaws.

A photostimulable phosphor (PSP) is a type of crystal that is used in radiography to detect X-rays and other ionizing radiation.

When PSP is exposed to ionizing radiation, it retains the energy and stores it as a latent image that can be read and converted into a visible image using a laser beam.

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