2Al2 (CO3 )3 + 4H3 PO4 ---> AlPO4 + CO2 + H2O

Insert the correct number of atoms from each element from the reactant side of the equation

Al =
C =
O =
H =
P =

The density of sulfur dioxide gas at 420K and 29.9 kPa is 1.82 g/L.

To find the density of a gas, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

To calculate the density (d), we can rearrange the ideal gas law equation as follows: d = (molar mass * P) / (R * T), where the molar mass of sulfur dioxide (SO₂) is 64.06 g/mol.

First, we convert the given pressure from kPa to Pa by multiplying by 1000: 29.9 kPa * 1000 = 29900 Pa.

Next, we substitute the values into the formula: d = (64.06 g/mol * 29900 Pa) / (8.314 J/(mol·K) * 420 K).

After performing the calculation,

Therefore, the density of sulfur dioxide gas at 420K and 29.9 kPa is approximately 1.82 g/L.

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Complete question here:

Find the density of the gas sulfur dioxide at 420K and 29.9 kPa.

2.86g/L

0.548 g/L

0.844 g/L

1.82 g/L

The most electonegative atom of the following set is Fluorine (F).

Electronegativity is a measure of an atom's ability to attract electrons towards itself when it forms a chemical bond with another atom. In other words, it indicates how strongly an atom pulls the shared electrons towards itself. The periodic table provides a systematic arrangement of elements based on their properties, including electronegativity.

Let's look at the given sets of elements and find the most electronegative atom in each set:

a. K (potassium) - Potassium is a metal that belongs to group 1 of the periodic table. Within group 1, electronegativity generally decreases as you move down the group. This means that the lower the atomic number in group 1, the higher the electronegativity.

b. Ca (calcium) - Calcium is an alkaline earth metal that belongs to group 2 of the periodic table. Within group 2, electronegativity also decreases as you move down the group.

c. Mg (magnesium) - Magnesium is also an alkaline earth metal that belongs to group 2 of the periodic table. As mentioned before, electronegativity decreases as you move down group 2.

d. Na (sodium) - Sodium is a metal that belongs to group 1 of the periodic table. As we have seen before, electronegativity decreases as you move down group 1.

Therefore, the most electronegative atom in this set is Fluorine(F).

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Answer:

Explanation:

Here, we want to get the name for the given chemical formula

Looking at the formula, we look at the names of the element

The names are sodium and fluorine

We write the name of the metal element first, then the non-metal atom

Thus, we have it as

Answer:

The question is very complicated. In the liquid you should be able to see the solid. Anyway here is your answer. Hope it helps!

Explanation:

Mixing of Substances:

Many types of solids will dissolve into liquids under the right conditions. Certain factors will speed up the process of dissolving, including stirring the substance and heating it.

Answer and Explanation:

When a solid dissolves into a liquid, a solution is made. This happens because the solid is made up of particles that will come apart, or dissociate, in the liquid. It will appear that the solid has disappeared into the liquid, when in fact, its particles are still there. For example, salt (NaCl) easily dissolves in water. From a chemistry standpoint, it does so because the salt molecules separate into their charged ions once in the water. The ions become attracted to the slightly charged water molecules, making them stay in the solution. This process can be reversed. If the water is evaporated, the salt ions will come back together to form NaCl molecules.

Answer:

Think of each polar bond in a molecule as a little arrow pointing from positive to negative. This tells us that the bond dipole is a vector quantity. Like any other vector quantity, the direction is a vital aspect of its description. So, the geometry of the molecule determines the direction that the bond dipole vectors point. The polarity of the molecule results from adding up all these individual bond dipoles.

Explanation:

Hope this helped Mark BRAINLIEST!!!

The Earth's surface is not covered with the same materials ; however, some areas share similar materials.Several drilling sites have been dug in various regions of the planet to analyze the Earth's surface.

Each drilling site is unique, with differing characteristics and results. Despite these differences, all of the drilling sites analyzed offer scientists a more in-depth knowledge of the Earth's surface.In essence, the scientific drilling sites each had different lithologies, stratigraphies, and geologies. Each site had different types of rocks, depths, and ages, which led to varying drilling conditions, depths, and equipment used. Different types of equipment were also used to reach the depths required, which was a significant difference in each drilling site.The scientific drilling sites also had different purposes. Scientists had specific goals they wanted to achieve at each location. For example, the scientific drilling site in the Iceland region was focused on analyzing a unique layer of igneous rocks. The primary objective was to investigate the formation of the rock layer.The same materials were not found at each scientific drilling site.

Still, they had some similarities. They all provided geologists with vital information about the Earth's surface. The data provided from each drilling site was used to piece together the Earth's geologic history and how it has changed over time.

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Answer:

B. 2

Explanation:

A double covalent bond is where two pairs of electrons are shared between the atoms rather than just one pair

B

A Double bond is when two atoms share two pairs of electrons with each other. It is depicted by two horizontal lines between two atoms in a molecule

The “Phosphate trap” in the estuary of Chesapeake Bay is a phenomenon that causes a low oxygen condition in the bottom waters of the Bay. The local ban on phosphorus in detergents was not particularly helpful in mitigating eutrophication in the estuary of Chesapeake Bay.

The “Phosphate trap” is a process whereby, under certain conditions, phosphate in the sediments is released and becomes available for growth in the overlying water column.

This is due to the fact that detergents account for only a minor part of the phosphorus inputs into the Chesapeake Bay. The major sources of phosphorus are agricultural run-off, wastewater treatment plants, and air deposition. Therefore, reducing the phosphorus input from these major sources will be more effective in mitigating eutrophication in the Chesapeake Bay.

Overall, the local ban on phosphorus in detergents had a limited effect on mitigating eutrophication in the estuary of Chesapeake Bay.

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Answer: Genetically modified plants may harm organisms that were never indented to be harmed.

Answer:

Explanation:

C = 41.4/12 = 3.43

H = 3.47/1 = 3.47

O = 55.1/16 =3.44

CHO is the skeletal formula (divide each by the lowest number above). The results are close enough to 1 to be 1.

(CHO)_x = 116

C + H + O = 29

(29) _ x = 116

x = 116/29

x = 4

So there area 4 carbons 4 hydrogens and 4 oxygens.

The correct formula is C4H4O4

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer: electrons have a wave like character and can be solved with wave equations

Explanation: it’s the answer

Schrödinger's solution to the wave equation agreed with the Rydberg constant, proving electrons have a wave-like character and can be solved with wave equations. The correct option is C.

Schrödinger's solution tells the position of an electron is space and time. It also tells the energy and position of electrons. It describes the wave nature of the electron.

Rydberg constant is the unit of energy. Its symbol is Ry. It is equivalent to the photon's energy, whose wave number is the Rydberg constant. It is a physical constant.

Either the exponential or the trig functions must be chosen; not both. Particles are traveling left and right in the sin and cos solutions, which represent states of definite energy.

Thus, the correct option is C. Electrons have a wave-like character and can be solved with wave equations regarding Schrödinger's solution.

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If this energy were stored as hydrated glycogen instead of fat, we get a new weight of approximately 90.083 kg or 199.0838 pounds.

To calculate the amount of energy stored as fat in this middle-aged man, we first need to determine the amount of fat in his body. With a weight of 90 kg and 15% body fat, we can calculate that he has 13.5 kg of fat (90 kg x 0.15 = 13.5 kg).

To convert this to energy in kJ, we use the energy yield from fat, which is 37 kJ/g. Multiplying 13.5 kg by 37 kJ/g gives us a total of 499.5 kJ of energy stored as fat in this man's body.

If this same amount of energy were stored in hydrated glycogen, which has an energy yield of 6 kJ/g, we can calculate how much glycogen would be needed. Dividing 499.5 kJ by 6 kJ/g gives us approximately 83.25 g of hydrated glycogen.

To determine the man's weight if this energy were stored as hydrated glycogen instead of fat, we need to subtract the weight of the fat and add the weight of the hydrated glycogen. The weight of 13.5 kg of fat is equivalent to 29.76 pounds (13.5 kg x 2.20462 lbs/kg). Adding the weight of 83.25 g of hydrated glycogen, which is approximately 0.08325 kg or 0.1838 pounds, we get a new weight of approximately 90.083 kg or 199.0838 pounds.

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When sulfuric acid is combined with sugar, gas is released and a tall black column forms. This is an example of a Dehydration Reaction.

A Dehydration reaction is defined as a chemical reaction that involves the loss of water from the reacting molecule or ion. Dehydration reactions is the reverse of a hydration reaction. Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. The expansion of the mixture is the result of vaporization of water and CO2 inside the container. The gases inflate the mixture to form a snake-like shape and give off a burned sugar smell. The granularity of the sugar can greatly affect the reaction. powdered sugar reacts very quickly but sugar cubes take longer to react.

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Answer: 3 they move more freely since water is a liquid and ice is a solid in a solid molecules are more compact and cannot move around much but in a liquid it moves more freely than it would in a solid.

Explanation:

Compared to ice, molecules of water behave differently in that they move more freely. The Option C.

In the solid state, water molecules arrange themselves into a crystal structure, forming a lattice in ice. This lattice structure restricts the movement of the water molecules causing them to vibrate in fixed positions.

On the other hand, in the liquid state, the water molecules have more kinetic energy allowing them to move more freely and interact with each other by forming temporary hydrogen bonds. This increased mobility of water molecules in the liquid state enables them to flow and take the shape of their container.

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Answer:

The right alternative is Option D (0.78 V).

Explanation:

According to the question,

The cell potential will be:

= \(E^0_{Cr_2 O_7/er^{3+}}- E^0_{Fe^{2+}/Fe}\)

By putting the values, we get

= \(1.23-0.45\)

= \(0.78 \ V\)

Thus the above is the correct option.

Answer:

yolo go with C

Explanation:

The standard isotope used to define the atomic mass unit (amu) is carbon-12 (^12C). It is assigned a mass of exactly 12 amu, and the atomic masses of other elements are determined relative to carbon-12.

The atomic mass unit (amu) is a unit of measurement used to express the masses of atoms and molecules on a scale relative to the mass of carbon-12 (^12C). Carbon-12 is chosen as the standard isotope because it is abundant, stable, and has six protons and six neutrons, giving it a total mass of 12 atomic mass units. By definition, carbon-12 is assigned a mass of exactly 12 amu.

To determine the atomic masses of other elements, a mass spectrometer is employed. In a mass spectrometer, ions are accelerated and separated based on their mass-to-charge ratio. The ratio is measured relative to carbon-12, allowing for the determination of the atomic mass of other elements. For example, if an element has an atomic mass of 16 amu, it means its mass is 1.33 times greater than carbon-12.

By using carbon-12 as the standard isotope and establishing a scale based on the mass-to-charge ratio in a mass spectrometer, scientists are able to accurately measure and compare the masses of different elements and molecules in a consistent manner.

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Explanation:

We have to balance the following equation:

__ H₂O + __ F₂ -------> __ HF + __ O₂

First we have to determine the number of atoms of each element that we have on both sides of the equation.

__ H₂O + __ F₂ -------> __ HF + __ O₂

O: 1 O: 2

H: 2 H: 1

F: 2 F: 1

We have 2 atoms of O on the right side and 1 atom of O on the left side. To balance the O atoms we can change the coefficient for H₂O and write a 2 in front of it.

2 H₂O + __ F₂ -------> __ HF + __ O₂

O: 2 O: 2

H: 4 H: 1

F: 2 F: 1

Then we have 4 atoms of H on the left and 1 atom of H on the right side of the equation. We can change the coefficient for HF to balance the H atoms.

2 H₂O + __ F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 2 F: 4

And finally we have 2 atoms of F on the left and 4 atoms of F on the right. We can change the coefficient for F₂ and write a 2 there.

2 H₂O + 2 F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 4 F: 4

The equation is balanced.

Answer: 2 H₂O + 2 F₂ -------> 4 HF + O₂

Answer:

. a pure substance consists only of one element or one compound.

. a mixture consists of two or more different substances, not chemically        joined together

The answer is A.

We know the formula for molarity :

Molarity = Number of moles ÷ Volume

Let's assume there are 0.6 moles of NaCl in 1 liter of ocean water.

Then, mass of salt is :

Answer:

Explanation:

hope it's helpful

Answer:

sog-20g=30g

Explanation:

Answer:

To determine the age of the ancient cloth, we can use the concept of radioactive decay and the half-life of Carbon-14.

Carbon-14 is a radioactive isotope of carbon, which decays over time into nitrogen-14 through beta decay. The half-life of Carbon-14 is 5614 years, which means that after 5614 years, half of the original amount of Carbon-14 in a sample will have decayed.

In this case, the cloth contains only ¼ of its original Carbon-14. This means that three half-lives have passed since the cloth was first created, as each half-life reduces the amount of Carbon-14 by half.

To determine the age of the cloth, we can use the following formula:

N = N0(1/2)^t/T

where N is the current amount of Carbon-14 in the cloth, N0 is the original amount of Carbon-14 in the cloth, t is the time that has passed, and T is the half-life of Carbon-14.

We know that N = ¼ N0, and T = 5614 years. Plugging these values into the formula, we get:

¼ N0 = N0(1/2)^(3/T)

Solving for t, we get:

t = (3/T) * log(2)

Substituting in T = 5614 years, we get:

t = (3/5614) * log(2) ≈ 1,684 years

Therefore, the cloth is approximately 1,684 years old.

In summary, we can use the concept of radioactive decay and the half-life of Carbon-14 to determine the age of the ancient cloth. By knowing the current amount of Carbon-14 in the cloth, we can calculate the time that has passed since it was first created using a simple formula. In this case, the cloth is approximately 1,684 years old.

The overall E° is negative (-0.90 V), and the reaction is spontaneous under standard-state conditions.

To calculate the standard cell potential (E°) for the given reaction, you need to use the standard reduction potentials (E°) for each half-reaction involved.
The given reaction can be split into two half-reactions:
1. Fe2+ (aq) → Fe3+ (aq) + e- (oxidation half-reaction)
2. Pb2+ (aq) + 2e- → Pb (s) (reduction half-reaction)
Now, we need to find the standard reduction potentials (E°) for each half-reaction.
From the standard reduction potentials table, the E° for the oxidation half-reaction is +0.77 V, and the E° for the reduction half-reaction is -0.13 V.

To find the overall E° for the given reaction, we subtract the E° of the oxidation half-reaction from the E° of the reduction half-reaction:
E° overall = E° reduction - E° oxidation
E° overall = -0.13 V - (+0.77 V) = -0.90 V
Since the overall E° is negative (-0.90 V), the reaction is spontaneous under standard-state conditions.

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Answer:

he molar mass is defined as the mass in grams of 1 mol of that substance. One mole of isotopically pure carbon-12 has a mass of 12 g

Explanation: