what percent composition of phosphorus in zn3(po4)2? this means to find the percent composition of each element in the compound (zn, p, and o)

Answer:

voliiviloou

Explanation:

volaiviolu

Answer:

Rows

Explanation:

The empirical formula of the solid can be represented as x:y.

The empirical formula of the solid is determined by the ratio of the atoms found at the corners and faces of the face-centered cubic cell.

Since the number of atoms at the corners is represented by x, and the number of atoms at the faces is represented by y, then the empirical formula of the solid can be represented as x:y.

For example, if a face-centered cubic cell contains 2 atoms at the corners and 6 atoms at the faces, then the empirical formula of the solid can be written as 2:6, or 1:3.

The empirical formula of the solid, it is necessary to first determine the total number of atoms that make up the cell.

This can be done by multiplying the number of atoms at the corners (x) by 8, since there are 8 corners in a face-centered cubic cell, and adding the result to the number of atoms at the faces (y).

This total number of atoms can be represented as T, and can be written as T = 8x + y.

The empirical formula of the solid is then determined by dividing the number of atoms at the corners (x) and faces (y) by the total number of atoms (T). This calculation can be written as x/T and y/T.

Therefore, the empirical formula of the solid is determined by the equation x/T:y/T.

For example, if a face-centered cubic cell contains 2 atoms at the corners and 6 atoms at the faces, then the total number of atoms in the cell is 14 (8x2 + 6).

Therefore, the empirical formula of the solid can be calculated as 2/14:6/14, or 1:3.

The empirical formula of the solid in a face-centered cubic cell can be determined by,

calculating the total number of atoms in the cell (8x + y), and then dividing the number of atoms at the corners (x) and faces (y) by this total number. The result is the empirical formula of the solid, which is represented as x:y.

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Answer: C. A child shivering in the cold

Explanation:

Did the test. :)

As a 14-carbon fatty acid is oxidized in mitochondria; 7 β-cycles are performed, and 8 acetyl-CoA molecules are produced.

The β-oxidation of fatty acids is a process that takes place in mitochondria. Fatty acids are oxidized by the stepwise removal of two-carbon units in the form of acetyl-CoA. The fatty acids are first activated in the cytoplasm by combining with coenzyme A (CoA) to form a fatty acyl-CoA. Acyl-CoA is transferred to the mitochondrial matrix by carnitine. The CoA is released again in the mitochondrial matrix, and β-oxidation takes place there. The β-oxidation pathway occurs in four successive steps.

The initial step is the oxidation of the fatty acid to an enoyl-CoA, which is then hydrated to β-hydroxyacyl-CoA. The β-hydroxyacyl-CoA is then oxidized again to a β-ketoacyl-CoA and eventually cleaved to acetyl-CoA and a shortened fatty acyl-CoA, which undergoes the next round of the cycle.

In a 14-carbon fatty acid, seven such cycles would be required to convert it into seven acetyl-CoA molecules, each consisting of two carbons. These acetyl-CoA molecules may be used in the citric acid cycle to produce ATP via oxidative phosphorylation.

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The percent error in the measurement of vitamin C amount by the student is 31.6%.

% error = (95 - 65)/95 × 100

% error = 30/95 × 100

% error = 31.6%.

Therefore, the percent error in the measurement of vitamin C amount by the student is 31.6%.

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Answer:

The energy content of substances is related to the physical state in which the substance exists. Molecules of gases are always in motion as they possess very high kinetic energy, hence, they exist as gases. Liquid molecules are less energetic than gas molecules, hence they have less flow than gases. Solid molecules on the other are fixed at a place because they possess very low kinetic energy and can only vibrate about their fixed positions.

Explanation:

The three states in which matter exist are solid, liquid and gas.

Solids are made of molecules that are closely packed together and held together by strong intermolecular forces. The particles in a solid possess very low kinetic energy and are not free to move about but can only vibrate and rotate about their fixed positions.

Liquids particles are able to  move about as they possess enough kinetic energy to limit or reduce the strength of the intermolecular forces binding them together. Thus, liquids can flow.

The particles in a gas are relatively far apart and possess kinetic energy more than the particles of a liquid or solid. The intermolecular forces binding particles of gas together are weak due to the very high kinetic energy of yhe gas particlest

Answer:

25 K

Explanation:

298-273=25 Kelvin

CO₂ behaves the most and least ideally even under extreme conditions.

A gas is a substance that has no constant size or form. Whilst inside a closed container, gasoline will amplify to fill the field. An instance of gas is the air you breathe. The gas interior of your digestive tract is fabricated from the air and different gases.

Traits of Gases :

* Gases have neither definite shape nor particular volume. They expand to the dimensions of their container.

* Gases are fluid and go with the flow effortlessly.

* Gases have low density, except compressed.

* Gases diffuse (mix and unfold out) and effuse (tour thru small holes).

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Explanation:

Acidic radical

Acid radical is the ion formed after the removal of Hydrogen ion (H+) from an acid. Example: When H2SO4 loses H+ ion, it forms HSO4− which is an acid radical.

Basic radical

The ion formed after the removal of hydroxide ion (OH−) from a base is known as basic radical.

Answer: Compound are different than elements because compounds are combinations of 2 or more elements.

Oxidation D) occurs when the electrons are lost from an atom or compound. Oxidation refers to a chemical reaction where there is a transfer of electrons from one substance to another.

During oxidation, the substance that loses electrons is known as the reducing agent while the substance that gains electrons is known as the oxidizing agent. When an atom or compound loses electrons during oxidation, it becomes more positively charged, and this results in a decrease in its negative charge.

For example, when iron rusts, it undergoes oxidation as it loses electrons to oxygen. The iron atoms lose their electrons, and as a result, they become positively charged. This causes the iron compound to have a more positive charge than it did before the oxidation process.

In summary, oxidation occurs when electrons are lost from an atom or compound, which results in a decrease in the negative charge of the compound or atom.

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Answer:

20 degrees

Explanation:

Applying the second law of reflection,

Second Law of reflection: The law of refelection states that the incident angle, reflected angle.

Mathematically, it can be expressed as

i = r...................... Equation 1

From the question, we were told that the light strik the plane at an angle of 20 degrees to the normal.

Therefore,

i = 20 degrees.

If i = 20 degrees,

then,

r = 20 degrees.

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:

the largest increase is between for class 8 and 5 plus s i near station energy because this is much stronger electrostatic attraction between the intermolecular the forces joined at a point which is called electronic configuration

It takes more energy to remove core electrons than valence electrons.

What is ionisation energy (IE)?

Example 2

Knowing that the difference 4th and 5th ionisation energies is much larger, we can imply that this difference is caused by removing a core electron instead of a valence electron. This means that there are 4 valence electrons (as removing the 1st to 4th electrons are valence electrons while the 5th electron is a core electron).

Elements with 4 valence electrons lie in group IVA (also known as group 14) of the periodic table (such as carbon and silicon). We do not know which period the element is in thus the valence electronic configuration would be written as ns²np², where s² represents the 2 elements in the s block before the element, and p² shows that it is the 2nd element in the p block. n is the period number which we do not know.

In the attached periodic table, the s block, d block, and p block are in yellow, blue and purple respectively.

Writing electronic configuration

Let's look at an example! The valence electronic configuration of Arsenic would be 4s²3d¹⁰4p³. On the other hand, the electronic configuration would be 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³ or [Ar]4s²3d¹⁰4p³, since Argon is the closest noble gas that comes before Arsenic. Writing electronic configuration is done according to Aufbau principle, and this is simplified in the periodic table attached where you can count accordingly reading and counting from left to right of the periodic table then down. The number of elements in a certain block is written as a superscript.

Aufbau principle

Maximum number of electrons each subshell can hold

For 2g of magnesium: 3.31 g

For 10g of magnesium: 16.59 g

For 4kg of magnesium: 6.63 kg

The balanced chemical equation for the reaction is:

2 Mg + O2 → 2 MgO

The balanced chemical equation for the reaction is:

2 Mg + O2 → 2 MgO

From the equation, we can see that 2 moles of magnesium react with 1 mole of oxygen to produce 2 moles of magnesium oxide. Therefore, we can calculate the amount of magnesium oxide produced for each given mass of magnesium as follows:

Moles of Mg = mass / molar mass = 2g / 24.31 g/mol = 0.0823 mol

Moles of MgO produced = Moles of Mg x (2 moles MgO / 2 moles Mg) = 0.0823 mol x 1 = 0.0823 mol

Mass of MgO produced = Moles of MgO produced x molar mass of MgO = 0.0823 mol x 40.31 g/mol = 3.31 g

Moles of Mg = mass / molar mass = 10g / 24.31 g/mol = 0.4116 mol

Moles of MgO produced = Moles of Mg x (2 moles MgO / 2 moles Mg) = 0.4116 mol x 1 = 0.4116 mol

Mass of MgO produced = Moles of MgO produced x molar mass of MgO = 0.4116 mol x 40.31 g/mol = 16.59 g

Moles of Mg = mass / molar mass = 4000g / 24.31 g/mol = 164.47 mol

Moles of MgO produced = Moles of Mg x (2 moles MgO / 2 moles Mg) = 164.47 mol x 1 = 164.47 mol

Mass of MgO produced = Moles of MgO produced x molar mass of MgO = 164.47 mol x 40.31 g/mol = 6626.95 g or 6.63 kg

Calculation of Formula of Iron Oxide Produced:

According to the given information, 0.4 moles of iron reacts with 0.3 moles of oxygen gas. To determine the formula of the iron oxide produced, we need to first balance the chemical equation.

Fe + O2 → FeO

From the balanced equation, we can see that 1 mole of iron reacts with 1 mole of oxygen to produce 1 mole of iron oxide. Therefore, the ratio of moles of iron to moles of oxygen in the reaction is 1:1.

To do this, we can calculate the theoretical amount of moles of oxygen required to react completely with 0.4 moles of iron:

0.4 mol Fe × (1 mol O2 / 1 mol Fe) = 0.4 mol O2

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Approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

To determine the volume of 0.250 M NaOH required to neutralize 30.4 mL of 0.152 M HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

From the balanced equation, we can see that the stoichiometric ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, we require an equal number of moles of HCl to neutralize.

First, let's calculate the number of moles of HCl present in the given volume:

Moles of HCl = concentration of HCl * volume of HCl

= 0.152 M * 30.4 mL

= 4.6208 mmol (millimoles)

Since the stoichiometric ratio is 1:1, the number of moles of NaOH required to neutralize the HCl is also 4.6208 mmol.

Now, let's calculate the volume of 0.250 M NaOH needed to contain 4.6208 mmol:

Volume of NaOH = (moles of NaOH) / (concentration of NaOH)

= 4.6208 mmol / 0.250 M

= 18.4832 mL

Therefore, approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

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Answer: D

Explanation:

Answer

so AI has 13 atoms

S has 16 atoms

Na has 11 atoms

P has has 15 atoms

so the one with the most is S

S is sulfur

sulfur has many uses when it is processed along with some some biological uses.

Explanation:

Chemical reaction is the term which describes the conversion of substances into different substances.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

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Answer:

To solve this problem, we need to apply the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction. This means that the total mass of the reactants must be equal to the total mass of the products.

We start by writing a balanced chemical equation for the reaction between baking soda and vinegar:

NaHCO3 + CH3COOH → NaCH3COO + H2O + CO2

This equation tells us that one mole of baking soda (sodium bicarbonate) reacts with one mole of vinegar (acetic acid) to produce one mole of sodium acetate, one mole of water, and one mole of carbon dioxide.

We can use the molar masses of the compounds involved to convert the given masses into moles:

84 g of baking soda is equivalent to 0.8 moles (84 g / 84 g/mol)

60 g of vinegar is equivalent to 1.0 moles (60 g / 60 g/mol)

18 g of water is equivalent to 1.0 moles (18 g / 18 g/mol)

82 g of sodium acetate is equivalent to 1.0 moles (82 g / 82 g/mol)

The molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

To calculate the molarity of the KMnO4 solution, we need to use the stoichiometry of the reaction and the volume of the KMnO4 solution used in the titration.

Given:

Mass of H2O2 solution = 1.0 g

Concentration of H2O2 solution = 30 wt% (weight percent)

Volume of KMnO4 solution used = 22.143 mL

Molar mass of H2O2 = 34.01 g/mol

Step 1: Calculate the moles of H2O2 in the solution.

Moles of H2O2 = (Mass of H2O2 solution) / (Molar mass of H2O2)

= 1.0 g / 34.01 g/mol

= 0.0294 mol

Step 2: Calculate the moles of KMnO4 based on the stoichiometry of the reaction.

According to the balanced equation, the ratio of KMnO4 to H2O2 is 2:5.

Therefore, moles of KMnO4 = (Moles of H2O2) * (2/5)

= 0.0294 mol * (2/5)

= 0.01176 mol

Step 3: Calculate the molarity of the KMnO4 solution.

Molarity (M) = (Moles of KMnO4) / (Volume of KMnO4 solution in liters)

= 0.01176 mol / 0.022143 L

= 0.5316 M

Therefore, the molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

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One way of which element has the lowest or highest ionization energy is by looking at the periodic table. The periodic table has many properties possible to be understood, one of which is ionization energy, which is the ability of an element to make ions, becoming more reduced (gain electrons) and making another atom become more oxidized (lose electrons), the trend of ionization energy in the periodic table follow the directions up and right, so if the atom if in the far right of the periodic table, this means that this atom has a high ionization energy, and from the given options the one with the higher ionization energy will be Fluorine, answer letter B

Answer:

nah she right

Explanation:

Answer:

This is incorrect because a Lunar Eclipse blocks the Sun's rays from reaching EARTH. So for a few seconds, maybe minutes, there is not direct light on earth. So she is incorrect.

Explanation:

I am pretty sure this is right. I hope this helps

The percentage of salt in the solution is 20%.

To calculate the percentage of salt in a solution, we need to divide the mass of the salt by the total mass of the solution and then multiply by 100.

Given:

Volume of water = 100 mL

Mass of salt = 25 g

To determine the total mass of the solution, we need to consider the mass of water and the mass of salt:

Total mass of solution = Mass of water + Mass of salt

Converting the volume of water from milliliters to grams, assuming the density of water is approximately 1 g/mL:

Mass of water = Volume of water * Density of water

Mass of water = 100 mL * 1 g/mL = 100 g

Total mass of solution = 100 g + 25 g = 125 g

Now we can calculate the percentage of salt in the solution:

Percentage of salt = (Mass of salt / Total mass of solution) * 100

Percentage of salt = (25 g / 125 g) * 100

Calculating:

Percentage of salt = 20%

Therefore, the percentage of salt in the solution is 20%.

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Answer:

B

Explanation:

Please take a look at the picture attached for the drawings and structures.

C2H4 is a alkene (C-C double bond). When steam (water) is added, it turns into an alcohol, where the double bond breaks and a (-OH) functional group is attached to one of the Carbons. In this case, C2H4 ethene is turned into ethanol.

When an alcohol undergoes oxidation, primary alcohols turn into aldehyde (-CHO) or carboxylic acids (-COOH). Secondary alcohol turns into ketone. Ethanol is a primary alcohol. And since it later reacts with propanol, it can only form carboxylic acid when it oxidizes. The product in this reaction is ethanoic acid.

Carboxylic acid reacts with alcohol to form an ester (-COO-). the -COOH group from acid combines with the -OH group from alcohol to form an ester bond -COO- while eliminating H2O. Therefore, when propanol undergoes esterification with ethanoic acid, propyl ethanoate is produced. It is the answer of B.

In the electromagnetic spectrum, in order to avoid samples to absorb air while dealing with IR it is necessary that the sample must not come in contact with air.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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Answer:

33.4814814815

Explanation:

90.4/2.70

After 10 seconds, 88 grams of unobtanium-31 are present, after 20 seconds, 44 grams are present, after 30 seconds, 22 grams are present, after 40 seconds, 11 grams are present, and after 50 seconds, 5.5 grams are present.

The amount of unobtanium-31 remaining after certain intervals of time, given that the half-life of the radioactive element is 10 seconds is calculated below.

Initial quantity of the element is given as 176 grams.  

After 10 seconds:

Let's first figure out the fraction of the sample remaining after each time period because the half-life of a radioactive element tells us the fraction that decays over a certain period of time.

Using the half-life equation:

amount remaining = original amount x (1/2)^(time elapsed / half-life)

After 10 seconds, the time elapsed is equal to the half-life of the element,

So:

amount remaining = 176 x (1/2)^(10/10)

                               = 88 grams

After 20 seconds:

amount remaining = 176 x (1/2)^(20/10)

                               = 44 grams

After 30 seconds:

amount remaining = 176 x (1/2)^(30/10)

                               = 22 grams

After 40 seconds:

amount remaining = 176 x (1/2)^(40/10)

                               = 11 grams

After 50 seconds:

amount remaining = 176 x (1/2)^(50/10)

                               = 5.5 grams

Therefore, after 10 seconds, 88 grams of unobtanium-31 are present, after 20 seconds, 44 grams are present, after 30 seconds, 22 grams are present, after 40 seconds, 11 grams are present, and after 50 seconds, 5.5 grams are present.

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Answer:

hydrogen and oxygen make up water molecules

Answer:

Oxygen and Nitrogen

Explanation:

because these two elements react very strongly

The final temperature of the bomb calorimeter is 30.9°C.

Combustion reactions are those reactions in which a compound completly decompose in to carbon dioxide and water molecule.

The final temperature will be calculated by using the equation:

Q = mc(T₂ – T₁), where

Q = relesed heat from calorimeter = 24kJ = 24000J

m = mass of calorimeter = 1.30kg = 1300g

c = specific heat of calorimeter = 3.41 J/(g°C)

T₁ = initial temperature of calorimeter = 25.5°C

T₂ = final temperature of calorimeter = to find?

On putting all these values on the above equation and calculate for T₂, we get

T₂ = 24000/(1300)(3.41) + 25.5

T₂ = 30.9°C

Hence, correct option is (1) i.e. 30.9°C.

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Answer:

30.9

Explanation:

right on edge 2022