Write a balanced equation describing each of the following chemical reactions. (Use the lowest possible whole number coeficients. Include states-of-matter under the given conditions in your answer)
1) solid potassium iodate, kio3, decomposes to form solid potassium iodide and diatomic oxygen gas.

The neutralization reaction is:

O2H 3PO4 + 3Ba(OH) 2 → 6H 2O+ Ba(PO 4)2

A neutralization reaction is a type of chemical reaction that occurs between an acid and a base, resulting in the formation of a salt and water.

In this reaction, the hydrogen ions (H+) from the acid react with the hydroxide ions (OH-) from the base to form water (H2O), which neutralizes the acidic and basic properties of the reactants. The remaining ions then combine to form a salt.

The general equation for a neutralization reaction is:

Acid + Base → Salt + Water

For this question, the chosen answer is the neutralization reaction  because an acid (H3PO4) and a base (Ba(OH)2) react to form water and a salt (Ba(PO4)2).

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Answer:

I think carbon.

Explanation:

............

Answer:

16g

Explanation:

1 mole of O2 = 32 g = 6.022 x 10^23 molecules

3 x 10^23 molecules weights

3 x 10^23 x 32/(6.022 x 10^23)

= 15.94g or 16g

Given what we know, we can confirm that a pure element is one in which the element is comprised of a single stable isotope, while a pure compound is a set of elements that are chemically fused.

Therefore, we can confirm that while for elements, it is considered pure when a single element is present in a stable form, this is not the case for a pure compound in which multiple elements can come together to create a chemically bonded substance.

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Answer:

13.6 g

Explanation:

The mass of BeF₂ present in 655 ml of a solution that is 0.442 M is equal to 13.82 g.

We can calculate the concentration of a solute in a solution in terms of molarity, molality, and normality.

The molarity of a particular solution can be determined from the number of moles of a solute per unit volume of the solution.

The Molarity of the particular solution can be determined from the mathematical formula mentioned below:

Molarity = Moles/Volume of the Solution

Given, the molarity of BeF₂ solution = 0.442 M

The volume of the BeF₂ solution, V = 655 ml = 0.655 L

The molar mass of the BeF₂, M = 47.01 g/mol

Molarity of BeF₂ solution = m/(M × V)

0.442 = m/ (47.01 × 0.655)

m = 13.82 g

Therefore, 13.82 g of BeF₂ is required for the given solution.

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Therefore, approximately 2.61 liters of the 0.325 M K2CrO4 stock solution are needed to prepare 4.00 L of the 0.212 M K2CrO4 solution.

To determine the volume of the stock solution needed to prepare the desired concentration, we can use the equation:

C1V1 = C2V2

Where:

C1 = concentration of the stock solution

V1 = volume of the stock solution

C2 = desired concentration

V2 = desired volume

Plugging in the given values:

C1 = 0.325 M

V1 = ?

C2 = 0.212 M

V2 = 4.00 L

Solving for V1:

C1V1 = C2V2

0.325 V1 = 0.212 * 4.00

0.325 V1 = 0.848

V1 = 0.848 / 0.325

V1 ≈ 2.61 L

Therefore, approximately 2.61 liters of the 0.325 M K2CrO4 stock solution are needed to prepare 4.00 L of the 0.212 M K2CrO4 solution.

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Adding an ionic species to pure water can result in a change in pH if the species reacts with water to produce either acidic or basic products. Specifically, ionic species that can donate or accept protons (H⁺) can alter the concentration of H⁺ ions in the water and consequently affect its pH.

For example, if an ionic species donates protons to water, it increases the concentration of H⁺ ions, making the solution more acidic and lowering the pH. Conversely, if an ionic species accepts protons from water, it reduces the concentration of H⁺ ions, resulting in a more basic solution and raising the pH.

The extent of pH change depends on the concentration and strength of the ionic species. Strong acids and bases, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH), can cause significant changes in pH when added to pure water due to their high reactivity and ionization. Weaker acids and bases may have a smaller impact on pH, depending on their concentration and dissociation constant.

In summary, the addition of an ionic species to pure water can affect the pH if the species can donate or accept protons, altering the concentration of H⁺ ions in the solution. The strength and concentration of the species determine the magnitude of the pH change.

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The molarity of the chloride ion is 2.0 * 10⁻⁵ M.

The molarity of the chloride ion is calculated using the formula below:

The percentage concentration of chloride ion = 727/kg * 10⁻⁶ Kg * 100/1

The percentage concentration of chloride ion = 0.0727%

Molar mass of Chloride ion = 35.5 g/mol

Molarity = (0.0727 * 1.035)/(35.5 * 100)

Molarity of chloride ion = 2.0 * 10⁻⁵ M

In conclusion, the molarity of the chloride ion is obtained from the density and percent concentration of chloride ions in seawater.

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Answer:

Magnetized objects move in the direction that reduces their magnetic potential energy. This is no different than the skate park.

Explanation:

Answer:

DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

\(KNO3 (s)\)  → \(K+ (aq) + NO_3^- (aq)\) is an endothermic reaction and entropy decreasing.

An endothermic reaction is any chemical reaction that absorbs heat from its environment.

This reaction  \(KNO3 (s)\)  → \(K+ (aq) + NO_3^- (aq)\) is absorbing heat from the surrounding. Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy (+ΔH).

It will lower the entropy of the surroundings by absorbing energy. In doing so the surroundings will lose energy, and randomness is decreased. These reactions are not spontaneous.

Hence, option B is correct.

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Limiting reactant = I₂

Mass of Mg leftover = 22.628 g

Given

Reaction between 25.0 g of Mg with 25.0 g of l₂

Required

The limiting reactant

mass of limiting and excess left over

Solution

Reaction

Mg + I₂⇒ MgI₂

mol Mg = 25 g : 24.305 g/mol = 1.029

mol I₂ = 25 g : 253.809 g/mol = 0.098

Limiting reactant = I₂

Excess reactant = Mg

The limiting reactant will be used up

Mol excess(unreacted) :

=1.029 - 0.098

=0.931

Mass I₂ left over :

= 0.931 x 24.305

= 22.628 g

Answer:

Zinc metals was oxidized ,zinc ions were reduced

Explanation:

The zinc atoms lose electrons and becomes oxidized . And zinc ions gain electrons (becomes reduced)

The redox reaction taking place here, is the zinc metal is oxidized and zinc ions are reduced further by accepting electrons. Hence, option a is correct.

In a redox reaction, one reactant species is oxidized and another one is reduced. Oxidation is the process of loss of one or more electrons to form its higher oxidation state.

Reduction is the process of gaining electrons forming its lower oxidation state. The species which undergoes oxidation is called oxidant and the one reduced is called reductant.

Zn metal have higher negative electrode potential and undergoes oxidation by losing two electrons to form the Zn²⁺ ions. Thus the Zn metal is oxidized.  The Zn²⁺ ions further undergoes reduction to form the metal by gaining electrons.

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Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.

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Answer: 9.91×10²³ particles

Explanation:

To find the amount of particles, you will need to use the Ideal Gas Law with what we are given.

Ideal Gas Law: PV=nRT

After we find moles, we can use Avogadro's number to convert to particles.

\(n=\frac{PV}{RT}\)

P=101.3kPa=1.00 atm

V=4.0 L

T=23°C+273.15=296.15 K

R=0.08206 Latm/Kmol

\(n=\frac{(1.00 atm)(4.0 L)}{(0.08206Latm/Kmol)(296.15K)}\)

\(n=0.164595 mol\)

Now that we have moles, we can convert to particles.

\(0.164595mol*\frac{6.022*10^2^3 particles}{mol} =9.91*10^2^2 particles\)

The radioactive isotope Technium-99 decays most likely through alpha decay (99tc). An atomic nucleus emits an alpha particle during the radioactive decay process known as "alpha decay".

and then changes or "decays" into a separate atomic nucleus with a mass number that is decreased by four and an atomic number that is decreased by two. The nucleus of an atom of helium-4 is the same as an alpha particle. Radioisotopes are an element's radioactive isotopes. They are the atoms with unstable neutron-proton combinations or excess energy in their nuclei. During those processes, the radionuclide is said to experience radioactive decay, albeit the surplus energy may be put to use in any number of ways.

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There are two fundamental nuclear processes considered for energy production: fission and fusion. Fission is the energetic splitting of large atoms such as Uranium or Plutonium into two smaller atoms, called fission products. To split an atom, you have to hit it with a neutron.

IamSugarBee

Answer:

There are two fundamental nuclear processes considered for energy production: fission and fusion. Fission is the energetic splitting of large atoms such as Uranium or Plutonium into two smaller atoms, called fission pr

Answer:

carbon dioxide hope I helped please mark brainliest

While visiting his uncle's farm, Derek learned that horses and donkeys are two different species. Based on this information, Derek can infer that horses and donkeys are members of different populations.


Since horses and donkeys are different species, they belong to different populations. A population refers to a group of individuals of the same species that live in the same area and can interbreed. While horses and donkeys can mate, their offspring, known as mules, are usually infertile.

This means that mules cannot produce offspring of their own, which indicates that horses and donkeys are not members of the same population. In contrast, if they were members of the same population, they would be able to produce fertile offspring. Therefore, Derek can infer that horses and donkeys are members of different populations.

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Answer:

5e-6

Explanation:

Answer:

0.005

Explanation:

The formula for this equation is dividing the length value by 1000 which will give you your answer which in the case I gave you the answer to your question your welcome. : )

Answer:

Question1: Isotopes, element, protons, neutrons. Question 2: W and Y

Explanation:

An Isotope is atoms of the same element that have a different amount of neutrons.

Both are Carbon atoms, but their Atomic Masses are different, and Atomic Masses are made up of Protons and Neutrons, which proves this!

Hope this helps! :D

Answer:

Silver (Ag)

Explanation:

The electronic configuration of copper is shown below;

[Kr]4d10 5s1

We can see that there is only one 5s1 electron. Hence Ag^+ tends to display a pseudo noble gas configuration. This pseudo noble gas configuration explains why silver is prevalent in the +1 oxidation state.

The other transition metals have many stable oxidation states found in nature. Chromium is observed both in +3 and +6 oxidation states. Iron is found in +2 and +3 oxidation states and copper is mostly stable in the +2 oxidation state since the +1 oxidation state readily disproportionate.

Hence silver tends to have only a single ionic charge for reasons aptly stated above.

A reflex arc consists of only one synapse between a sensory neuron and a motor neuron. This allows for a rapid, involuntary response to a stimulus without involving higher brain centers.

A reflex arc is a neural pathway that controls reflexive actions in the body. It bypasses the brain and spinal cord's involvement, allowing for a quick and automatic response to a stimulus.

In some reflex arcs, there is only one synapse between the sensory neuron and the motor neuron. This means that the sensory information received by the sensory neuron is relayed directly to the motor neuron with only one connection point, or synapse, in between.

This single synapse allows for a rapid transmission of the nerve impulse, minimizing the delay in executing the reflexive response.

The absence of involvement from higher brain centers in a reflex arc allows for a quicker response time because the signal doesn't need to travel to the brain for processing and decision-making.

Instead, the reflex arc allows for an automatic response that is essential for our survival and protection, such as pulling away from a hot object or blinking in response to a sudden bright light.

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Complete question - Reflex arc consists of only one synapse between two neurons. Explain

4 moles of Fe react with 3 moles of oxygen. Therefore, the mole ratio of iron to iron oxide in this process is 4:2.

The chemical element with the atomic number 8 and symbol O is called oxygen. It belongs to the periodic table's halogen group, is a very reactive nonmetal, and an oxidizing agent that easily produces oxides with most elements as well as other compounds.

The non-metallic element oxygen occurs naturally as a molecule. Two oxygen atoms that are tightly bound together make up each molecule. Oxygen is in a gaseous form at ambient temperature due to its low melting and boiling temperatures.

According to scientists, the oceans produce between 50 and 80 percent of the oxygen used on Earth. Oceanic plankton, which includes floating plants, algae, and certain bacteria that can photosynthesize, is the main source of this production.

Thus, 4 moles of Fe react with 3 moles of oxygen.

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Answer:

.........................................................................................................................................................................................................................................................................................................................................................................................................................................................

Explanation:

If 36g of Al react with 34L of Oz, 0.667 moles of Al2O3 are produced. The correct option is b, 0.667 moles

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

\(\rm 4Al +3O_2 -- > 2Al_2O_3\)

Step1- calculate the moles of aluminum

The mass of Al is 36 g

The molar mass of Al is 27

\(\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\rm Number\;of \;moles\;of\;Al = \dfrac{36}{27} = 1.33\;mol\)

Step2- calculate the moles of oxygen

The mass of O₂ is 34 L

\(\rm 1 L = \dfrac{1}{22.4 }\)

\(\rm Number\;of \;moles\;O_2= \dfrac{34}{22.4} = 1.51\)

The limiting reagent is 1.33 MOL. By the rule of stoichiometry, four moles of Al produced 2 moles of Al.

\(\rm \dfrac{1.33}{2} = 0.665 \;moles\)

Thus, the correct option is b. 0.667 moles.

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