Write balanced equations for each of the following by inserting the correct coefficients in the blanks:
(d) __C₆H₁₀O₅(s)+__O₂(g) → __CO₂(g) 1 __H₂O(g)

Answer:

neutrons is metal.......

The unknown chemical : Nitrogen gas : N₂

Given

1 mole of the unknown chemical

mass = 28 g

Required

The unknown chemical

Solution

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

mol = mass : molecular weight

Molecular weight(MW) = mass : mol

MW=28 g : 1 mol

MW= 28 g/mol

Because this compound is diatomic, it consists of 2 elements of the same type, so this element has a mass number:

28: 2 = 14

The element having the mass number 14 is N

Answer:

1.Sulfur dioxide and nitrogen oxide

2.a)it forms carbonic acid

b)

3.the community can use renewable energy like solar and wind power cause they produce less pollution

The correct formula for a compound formed from the elements Al and O is Al₂O₃.

Correct option is C.

Aluminum oxide is an oxide of aluminum with the chemical formula Al₂O₃ which is primarily composed of two chemically bonded aluminum and oxygen atoms. Aluminum oxide chemical compounds exist in various forms, with the most common being alpha, gamma, and theta.

The solid compound is an odorless, white powder which is insoluble in water and is a major component of the Earth's crust. It occurs naturally as corundum, bauxite, and cryolite and can be synthetically produced through burning aluminum metal or dissolving alumina tri-hydrate.

Aluminum oxide is widely used in a variety of applications due to its unique properties such as hardness, thermal conductivity, electrical conductivity, optical properties, and chemical inertness.

Correct option is C.

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The key differences between the Articles of Confederation and the U.S Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

The document created the better system of government for the new nation is the US constitution.

The Article of confederation , the state have stronger power than the central power and in the US constitution , the power of central government is stronger than the states. The important development was the establishment of three departments. There are three departments of government that is legislative , executive and judicial.

Thus, The key differences between the Articles of Confederation and the U.S. Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

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The molar solubility of BaCrO4 in 1.6 x 10^-3 M Na2CrO4 is 5.25 x 10^-10 M.

The solubility of BaCrO4 can be calculated using the solubility product constant (Ksp) and the stoichiometry of the balanced chemical equation for the dissolution of BaCrO4 in water.

The balanced chemical equation for the dissolution of BaCrO4 in water is:

BaCrO4(s) ↔ Ba2+(aq) + CrO42-(aq)

The solubility product constant (Ksp) expression for this reaction is:

Ksp = [Ba2+][CrO42-]

(a) To calculate the molar solubility of BaCrO4 in pure water:

Ksp = [Ba2+][CrO42-] = (x)(x) = x^2

where x is the molar solubility of BaCrO4 in pure water.

Rearranging the equation and solving for x, we get:

x = sqrt(Ksp) = sqrt(2.1 x 10^-10) = 1.45 x 10^-5 M

Therefore, the molar solubility of BaCrO4 in pure water is 1.45 x 10^-5 M.

(b) To calculate the molar solubility of BaCrO4 in 1.6 x 10^-3 M Na2CrO4:

In this case, the dissolution of BaCrO4 is affected by the common ion effect due to the presence of CrO42- ions from Na2CrO4. The balanced chemical equation for the reaction is:

BaCrO4(s) + 2Na+(aq) ↔ Ba2+(aq) + CrO42-(aq) + 2Na+(aq)

The initial concentration of CrO42- ions is 1.6 x 10^-3 M, and the concentration of BaCrO4 is x. Therefore, the equilibrium concentration of CrO42- ions is (1.6 x 10^-3 + x) M, and the equilibrium concentrations of Ba2+ and CrO42- ions are both x M.

The Ksp expression for the reaction is:

Ksp = [Ba2+][CrO42-] = (x)(1.6 x 10^-3 + x)

Substituting the value of Ksp and solving for x using the quadratic formula, we get:

x = 5.25 x 10^-10 M

Therefore, the molar solubility of BaCrO4 in 1.6 x 10^-3 M Na2CrO4 is 5.25 x 10^-10 M.

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Answer:

An acid and a base.

Explanation:

An acid and a base, combine to form the products salt and water

That is,

Acid + Base ----> Salt + water.

Answer:

Acid and base

The statement it is observed that when dull, grey magnesium is placed in acid, bubbles stream from the metal and the temperature rises is true.

Magnesium metal, which is drab and grey, reacts chemically with acid to produce hydrogen gas and magnesium ions in solution. Exothermic means that heat is emitted, which raises the temperature as a result of the reaction. The hydrogen gas that is being created as a result of the reaction is what is visible as bubbles.

A chemical reaction happens when magnesium (Mg) metal is dissolved in an acidic liquid like hydrochloric acid (HCl). The hydrogen ions (H+) from the acid react with the magnesium atoms on the metal's surface to create magnesium ions (Mg2+) and hydrogen gas (H2). In this particular single replacement or displacement process, magnesium replaces the acid's hydrogen:

MgCl2(aq) + H2(g) = Mg(s) + 2HCl(aq)

The fact that heat is emitted as a byproduct of this process indicates that it is exothermic. The temperature of the solution may rise as a result of the heat produced during the reaction. Because hydrogen gas is created during the reaction, which is less dense than the liquid and rises to the surface, bubbles are visible during the process.

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The factors that likely played a role in Jessie's fainting episode are a. chronic hyperglycemia, b. her anticonvulsant medication, c. overexertion while saving the drowning boy, and e. diabetic ketoacidosis.

Chronic hyperglycemia, indicated by option a, can affect blood flow and oxygen supply to the brain, potentially leading to fainting episodes. Anticonvulsant medication, mentioned in option b, can have side effects such as dizziness or lightheadedness, which may contribute to fainting. Overexertion, as stated in option c, can cause fatigue, dehydration, and low blood pressure, all of which increase the risk of fainting. Diabetic ketoacidosis, noted in option e, is a serious complication of diabetes that can lead to electrolyte imbalances and dehydration, potentially triggering a fainting episode.

Options a, b, c, and e are the correct answers.

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Answer: Option (A) is the correct answer.

Explanation:

An atom who has seven valence electrons in its ground state will have the following electronic configuration in its sub shells as 2, 7.

Thus, there will be in total 9 electrons and it is known that fluorine has atomic number 9.

Whereas sodium has 2, 8, 1 electrons in its sub-shell.

Calcium has 2, 8, 8, 2 electrons in its sub-shell and oxygen has 2, 6 electrons in its sub-shell.

Thus, we can conclude that out of the given options, fluorine is the element whose atom in the ground state has seven valence electrons.

The gas exerts a pressure of 133.33 kPa on the walls of the 3 liter which is calculated by using the expression of Boyle’s law.

A fixed amount of a gas occupies a volume of 1l and exerts a pressure of 400 kPa on the walls of its container.

Initial volume (V1) is 1L

Initial pressure (P1) is 400 kPa

Final volume (V2) is 3L

Boyle's law explains the absolute pressure and volume of a given mass of confined gas are inversely proportional while the temperature remains unchanged within a closed system.

According to the Boyle’s law,

        P1V1 = P2V2

        ⇒ P2 = (P1V1)/V2

Putting all tte values we get,

            P2 = (1L * 400 kPa / 3L )

                 = 133.33 kPa

So we get the gas exerts a pressure of 133.33 kPa on the walls of the 3 liter.

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Answer: The temperature would increase assuming it is 30 degree water causing a change in the temperature and assuming it is a seismic groundwater source you are using the earths core to heat the school so it would likely be a stable energy source. There are very few places on the planet where that warm of water is accessible without drilling really deep into the core but if it is there and is a stable fault then the energy would be consistent and stable.

The groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

Groundwater heating system:

Although the temperature of the ground water is not much but the amount of groundwater is too much.

This large amount water slowly releases heat energy which is transferred in the ambient atmosphere of school.

Therefore, the groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

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The concentration of the diluted solution be 100 ppm.

Chemistry uses the term PPM, or parts per million, to describe extremely low concentrations of solution. One liter of solution containing milligrams of the chemical is what is meant by this term. Technically speaking, it is a dimensionless quantity that can be used to measure lower concentrations in a solution.There are numerous scientific uses for this conversion.

It refers to how many of the one million parts that make up the entire solution a specific substance or molecule occupies. It is used to describe substance concentrations that are typically dissolved in a solvent. When there are two solutions, and one of them has a known ppm concentration, the ppm concentration can be calculated by:

ppm1 x volume = ppm2 volume

500 ppm x 2 mL = ppm2 x 10 mL

ppm 2 = 500 ppm x 2 mL/ 10 mL

ppm 2 = 100 ppm

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Answer:

it should be the second one :)

Explanation:

XY + Z→ XZ + Y is an example of a substitution reaction. A substitution reaction involves the exchange of one atom for another.

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Answer:

true

Explanation:

        This statement is true because the tension in the strings creates potential energy. Since a guitar's strings are being "pulled" between the headstock and bridge, there is tension.

        This statement would not be true if the strings were laying on the ground without being pulled, but since guitar strings are then this statement is true.

Answer:

The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.

Explanation:

Hope this helped! Good luck on whatever it is you're working on!

Answer:

The heart is a cardiac muscle,which is specialized to pump blood powerfully and efficiently throughout our entire life time.

Explanation:

I really hope this helps.

The salts of carboxylic acids, such as sodium benzoate, are often used in foods as preservatives. The correct answer is A) preservatives.

Salts of carboxylic acids, including sodium benzoate, are commonly used as preservatives in food. They help inhibit the growth of bacteria, fungi, and other microorganisms, thus extending the shelf life of various food products. Preservatives like sodium benzoate are particularly effective in acidic environments, such as soft drinks, fruit juices, and pickled foods.

While some food additives may serve multiple purposes, in the case of salts of carboxylic acids like sodium benzoate, their primary function is as a preservative rather than a coloring, sweetener, or flavor enhancer.

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The structural formula for potassium hydrogen phthalate (C8H5KO4), also known as KHP or potassium acid phthalate, is shown in the image attached.

This formula shows the atoms and bonds in the molecule, with the potassium ion (K+) and the hydrogen phthalate anion ([C8H5O4]−) separated by a dot. The phthalate anion is composed of two benzene rings connected by a carboxylic acid group (COOH) and a single carboxylate group (COO−) from the potassium hydrogen phthalate salt.

Potassium hydrogen phthalate (KHP) is a white crystalline powder that is commonly used as a primary standard for volumetric analysis, specifically for acid-base titrations. It is also used in the calibration of pH meters and in the preparation of buffer solutions.

KHP is a weak acid, and its chemical formula is C8H5KO4. It is the potassium salt of phthalic acid, which is a diprotic acid with two carboxylic acid groups. In water, KHP dissociates to form potassium ions (K+) and hydrogen phthalate anions ([C8H5O4]−), which can donate a proton to water molecules and act as a weak acid.

The use of KHP as a primary standard is based on its high purity, stability, and accurate molar mass, which allows precise determination of the concentration of a solution by titration. In an acid-base titration, a known volume of a standard solution of KHP is titrated with a solution of an unknown concentration of an acid or base until the equivalence point is reached. At the equivalence point, the moles of acid and base are equal, and the concentration of the unknown solution can be calculated from the known concentration and volume of the standard solution.

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Answer:

Equatorial sites

Explanation:

The choice of the location of bond pairs or lone pairs depends on the difference between the Xax-E-Xeq and Xeq-E-Xeq bond angles. Where X is a bonding group and E is a lone pair.

It follows that if we place the lone pair in an equatorial site, the structure is less crowded and there is less repulsion than when we place the lone pairs in an axial site.

Summarily, a lone pair occupies more space around the centeral atom than a bond pair hence it needs to be placed at an equatorial site where it experiences less repulsion than when it is placed in an axial site.

Answer:

The renewable energy source among the options you provided is solar power (option C). Solar energy is derived from the sun and can be converted into electricity or used for heating and other applications. It is a clean and sustainable form of energy.

Explanation:

The American airmen dropped the second atomic bomb on the city of Nagasaki. This occurred three days after the Enola Gay dropped the first atomic bomb on Hiroshima.

The bombing of Nagasaki took place on August 9, 1945, during World War II. It resulted in the deaths of approximately 40,000 to 80,000 people. The bomb used was called "Fat Man" and it was a plutonium bomb, different from the uranium bomb dropped on Hiroshima. The bombings of Hiroshima and Nagasaki were the only instances in history where nuclear weapons have been used in warfare.

These bombings had a significant impact on the end of World War II and the subsequent development of nuclear arms control agreements. It is important to note that the use of atomic bombs in Japan remains a topic of historical debate and raises complex ethical and moral questions.

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Answer:

C. Amount of 3 dimensional space the object occupies

Explanation:

Single dimension is a laminar

Amount of 2 dimension is area

Amount of 4 dimension is negligible

\(.\)

Answer C. Amount of 3 dimensional space the object occupies 

Explanation:

 Single dimension is a laminarAmount of 2 dimension is areaAmount of 4 dimension is negligible

Answer

Based on the previous we can say that: The law of conservation of the mass states that the total mass will always stay the same during a chemical reaction. After the reaction, the vessel will have a mass equal to the initial 245 g.

Explanation

The Law of Conservation of Mass states that the mass is neither created nor destroyed in chemical reactions. This means the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

Based on the previous we can say that: The law of conservation of the mass states that the total mass will always stay the same during a chemical reaction.

After the reaction, the vessel will have a mass equal to the initial 245 g.

Answer:

Number of energy levels that the element has.

Explanation:

The period number (n) is the outer energy level that is occupied by electrons. The period number that an element is in, is the number of energy levels that the element has.

In an experiment comparing the tension bond strength of polymer latex modified mortar (portland cement mortar with added polymer latex emulsions) to that of unmodified mortar, the result was x.

To conduct this experiment, you would need to follow these steps:

1. Prepare the materials: Gather all the necessary materials, including polymer latex emulsions, portland cement, sand, water, and any other additives required for the mortar mixture.

2. Prepare the polymer latex modified mortar: Mix the portland cement, sand, water, and polymer latex emulsions according to the specified proportions. Ensure thorough mixing to achieve a homogeneous mixture.

3. Prepare the unmodified mortar: Mix the portland cement, sand, and water according to the specified proportions. Again, ensure thorough mixing for a consistent mixture.

4. Perform the tension bond test: Apply both the polymer latex modified mortar and the unmodified mortar onto separate test surfaces, such as concrete blocks or metal plates. Make sure the surfaces are clean and free from any contaminants.

5. Allow the mortar to cure: Let both the modified and unmodified mortar cure for a specific duration, following the manufacturer's instructions or established industry standards.

6. Test the bond strength: Use a tension bond strength test apparatus, such as a hydraulic or mechanical testing machine, to apply a force perpendicular to the bond interface of the mortar. Apply increasing force until the bond fails and records the maximum force required for bond failure in both cases.

7. Compare the results: Analyze the data obtained from the tension bond test for both the polymer latex modified mortar and the unmodified mortar. Determine the maximum force or stress required for bond failure in each case.

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Answer:

4. The amount of caffeine in the drinks

5. The heart rate of the participants of the experiments

6. Water

7. i) The volume of drink taken should be constant

ii) The frequency of taking their drink is constant

iii) The time of drinking by the brothers is constant

Explanation:

In the question, Jeffery intends to find the caffeine drink that will result in the heart rate increasing most

The variables (varieties) of drinks tested by Jeffery = Pepsi, espresso, and water

Drink variable arranged by the order of increasing Caffeine content are presented as follows;

Caffeine content of water < Caffeine content of Pepsi < Caffeine content of espresso

The triplet with the double shot of espresso = The triplet with the highest heart rate

4. The independent variable is the variable which is suspected to be the cause of the specified observation

Therefore, in the question, the independent variable are the drinks with different amount of caffeine

5. The dependent variable is the effect or the outcome of the independent variable

The dependent variable in the question is the heart rate of the subjects in the study

6. The control group is the independent variable or input that is expected to give the minimum effect or output compared to other independent variables in the study such that the control group does not contain the suspected cause of the observation or effect under investigation

The control group (or variable) in the question is water which does not contain caffeine

7. Three constants that all three brothers should be doing are;

i) The three brothers should be taking a constant or the same quantity of their preferred drink

ii) The frequency at which they take their drinks should be constant

iii) The time at which the brothers take the drink should be the same

When the cyclist goes downhill, their energy increases and their potential energy decreases At the same time, they move down faster and their energy increases. The matchup of the images is given in the image attached.

If PE is lowest, this means the cyclist is at the lowest point, like at the bottom of a hill or in a valley. Right now, the cyclist has the lowest amount of potential energy due to gravity because they are the closest to the ground.

Therefore, when a cyclist goes uphill, their energy decreases but their potential energy increases.

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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 reaction is the example of combustion reaction.

CH₄ + 2O₂ → CO₂ + 2H₂O

Burning or combustion is a highly heated exothermic reaction. It occurs when a fuel and oxygen (an oxidant) combine, releasing gaseous byproducts that are also known as smoke. A saturated open chain hydrocarbon with carbon-carbon single bonds is referred to as an alkane.

Alkane releases a tremendous amount of heat energy when heated in the presence of enough oxygen or air to form carbon dioxide and water. If the combustion reaction takes place in insufficient oxygen produces poisonous gases carbon monoxide.

Hence, combustion is complete burning to form water and carbon dioxide.

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