If we project the relation r of problem 3 onto s(a, c, e), what nontrivial fd’s and mvd’s hold in s?

Answer:

Inferred that fossils were once part of living animals.

Explanation:

He realized that seashells that were from rocks were identical to ones on a beach.

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We structure the Lewis points and outline the forms of the following elements:

For a. SeCl4, the Lewis dot structure is:

  Se | Cl

= Cl | Cl

It has a tetrahedral shape with Se as the central atom.

For b. I3-, the Lewis dot structure is:

  I |

- I | I

It has a trigonal planar shape with I as the central atom.

For c. PSCl3, the Lewis dot structure is :

P | Cl

- - Cl | Cl Cl

It has a trigonal pyramidal shape with P as the central atom.

For d. IF4-, the Lewis dot structure is :

I | F

- - F | F F

It has a square planar shape with I as the central atom.

For e. PH2-, the Lewis dot structure is :

P | H

- H | H

It has a bent shape with P as the central atom.

For f. TeF42-, the Lewis dot structure is :

Te | F

- - F | F F

It has an octahedral shape with Te as the central atom.

For g. N3-, the Lewis dot structure is:

N |

- N | N

It has a linear shape with N as the central atom.

For h. SeOCl4, the Lewis dot structure is:

Se | O | Cl

- - - Cl | Cl Cl

It has a tetrahedral shape with Se as the central atom.

For i. PH4+, the Lewis dot structure is:

P | H

- H | H H | H

It has a tetrahedral shape with P as the central atom.

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Answer:

because during different seasons the earth is closer or farther from the sun

Explanation:

the earths rotation around the sun is an oval with the winter season being the closest to the sun and the summer  season being the farthest

Answer:

1. 1 mole of NaCl.

2. 1 mole of H₂O.

Explanation:

The balanced equation for the reaction is given below:

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of HCl reacted with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of H₂O.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted completely with 1 mole of NaOH. Therefore, HCl is the limiting reactant and NaOH is the excess reactant since we have 3.6 moles of NaOH.

1. Determination of the amount of NaCl produced from the reaction.

NOTE: The limiting reactant is used to determine the maximum amount produced since all of it is consumed in the reaction.

The limiting reactant is HCl and the amount of NaCl produced can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted to 1 mole of NaCl.

Thus, 1 mole of NaCl was produced.

2. Determination of the amount of H₂O produced from the reaction.

From the balanced equation above, it is evident that 1 mole of HCl reacted to produce 1 mole of H₂O.

Thus, 1 mole of H₂O was produced.

Wave-particle duality is a fundamental concept in quantum mechanics that describes the dual nature of particles and waves. The following statements correctly describe wave-particle duality:

1. All matter exhibits wavelike motion: This statement reflects the wave nature of particles. Even though particles have localized positions, they also exhibit wave-like properties, such as diffraction and interference.

2. Matter and energy are different forms of the same entity: According to Einstein's theory of relativity (E=mc²), energy and mass are interconnected. This concept suggests that matter can be viewed as a form of energy.

3. Energy and mass can be interconverted: This statement is a direct implication of Einstein's famous equation. It means that mass can be converted into energy and vice versa. This phenomenon is observed in nuclear reactions and particle interactions.

Wave-particle duality highlights the wave-like and particle-like behaviors exhibited by particles at the microscopic level. It revolutionized our understanding of the fundamental nature of matter and laid the foundation for quantum mechanics.

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Answer:

1.66 mins

Explanation:

Distance = 200 m

Speed = 2 m/s

Time taken = \(\frac{Distance}{Speed} = \frac{200}{2} = 100\) secs = 1.66 mins

As we travel down in the group, the halogens' boiling points rise. The resultant molecules may have a single carbon atom or as many as a million.

The attractive force grows as the number of electrons decreases in the group, and more energy is needed to counteract these forces, raising the boiling point.

Fluorine's boiling point of -188°C, Chlorine's of -34.6°C, Bromine's of 58.8°C, and iodine's of 184°C, as well as the trend in melting temperatures, are explained by the strengthening intermolecular interactions that bind the halogen molecules together.

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According to law of conservation of mass, the carbon cycle supports the law of conservation of mass as the  total amount of carbon does not change as it moves through the carbon cycle.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

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The pH of a solution made by dissolving 0.00135 moles of KOH in water to make 2.7l of solution is 10.70.

To find the pH of a solution made by dissolving 0.00135 moles of KOH in 2.7 liters of water, follow these steps:

1. Calculate the concentration of OH- ions:
Concentration of OH- ions = moles of KOH / volume of solution
= 0.00135 moles / 2.7 L
= 0.0005 mol/L (rounded to 3 decimal places)

2. Calculate the pOH of the solution:
pOH = -log10(concentration of OH- ions)
= -log10(0.0005)
= 3.30 (rounded to 2 decimal places)

3. Calculate the pH of the solution:
pH = 14 - pOH
= 14 - 3.30
= 10.70 (rounded to 2 decimal places)

The pH of the solution is 10.70.

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To determine the pH of a saturated solution of Ni(OH)2 with a Ksp of 2.0 x 10^-15, we'll follow these steps:

1. Write the dissociation equation for Ni(OH)2: Ni(OH)2(s) ⇌ Ni2+(aq) + 2OH-(aq)
2. Set up the expression for Ksp: Ksp = [Ni2+][OH-]^2
3. Let x be the concentration of Ni2+ and 2x be the concentration of OH-. Then, Ksp = (x)(2x)^2.
4. Plug in the given Ksp value and solve for x: 2.0 x 10^-15 = x(2x)^2.
5. Calculate the concentration of OH- ions (2x).
6. Use the OH- concentration to find the pOH using the formula: pOH = -log[OH-].
7. Convert pOH to pH using the relationship: pH + pOH = 14.

So, the pH of the saturated solution of Ni(OH)2 is approximately 9.20 (Option D).

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To determine the pH of a saturated solution of Ni(OH)2 with a Ksp of 2.0 x 10^-15, we'll follow these steps:

1. Write the dissociation equation for Ni(OH)2: Ni(OH)2(s) ⇌ Ni2+(aq) + 2OH-(aq)
2. Set up the expression for Ksp: Ksp = [Ni2+][OH-]^2
3. Let x be the concentration of Ni2+ and 2x be the concentration of OH-. Then, Ksp = (x)(2x)^2.
4. Plug in the given Ksp value and solve for x: 2.0 x 10^-15 = x(2x)^2.
5. Calculate the concentration of OH- ions (2x).
6. Use the OH- concentration to find the pOH using the formula: pOH = -log[OH-].
7. Convert pOH to pH using the relationship: pH + pOH = 14.

So, the pH of the saturated solution of Ni(OH)2 is approximately 9.20 (Option D).

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The reaction sequence that describes the method of determining the amount of iodate anion (IO3) in a saturated solution of calcium iodate (Ca(IO3)2) is given .

The anion that has the formula IO3 is known as an iodate. Since it is present in the majority of ores that contain iodine, it is the most prevalent type of iodine found in nature. Iodide salts are typically colorless in appearance.

Calcium iodate has the molecular formula, Ca (IO3) 2, and the molecular weight of 389.8834 g/mol where iodine atom is in the +5 oxidation state. This composition occurs as a mineral “ Lautarite (Calcium Iodate·Monohydrate). It can be prepared by the reaction of iodic acid upon the carbonate: CaCO3 + 2HIO3 ⇒ Ca (IO3)2 + CO2 + H2O

a.

IO3-(aq) + 6H+(aq) ~ 3I2(s) + 3H2O(l)b. 2IO3-(aq) + 10Fe2+(aq) + 16H+(aq) → I2(s) + 10Fe3+(aq) + 8H2O(l)

For the determination of the amount of iodate anion (IO3-) in a saturated solution of calcium iodate (Ca(IO3)2), the second sequence, b, is used.

The sequence involves the reaction of 2 iodate anions with 10 ferrous ions and 16 hydrogen ions to yield Iodine, 10 ferric ions, and 8 water molecules.

The amount of iodate anion present can be determined by the quantity of iodine produced.

The correct option is b.

2IO3-(aq) + 10Fe2+(aq) + 16H+(aq) → I2(s) + 10Fe3+(aq) + 8H2O(l)

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B.It will rotate and be in the sun.

Answer:

\(\boxed{\boxed {\sf 23.0 \ g \ Ba(NO_3)_2}}\)

Explanation:

We are asked to find the mass of 5.30 ×10²² formula units of barium nitrate.

First, we convert formula units to moles using Avogadro's Number or 6.022×10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are formula units of barium nitrate.

Set up a conversion factor using Avogadro's Number.

\(\frac{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}{ 1 \ mol \ Ba (NO_3)_2}\)

We are converting 5.30×10²² formula units, so we multiply by this value.

\(5.30 \times 10^{22} \ formula \ units \ Ba(NO_3)_2 *\frac{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}{ 1 \ mol \ Ba (NO_3)_2}\)

Flip the conversion factor so the units of formula units of barium nitrate cancel.

\(5.30 \times 10^{22} \ formula \ units \ Ba(NO_3)_2 *\frac{ 1 \ mol \ Ba (NO_3)_2}{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}\)

\(5.30 \times 10^{22} *\frac{ 1 \ mol \ Ba (NO_3)_2}{6.022 \times 10^{23}}\)

\(\frac{5.30 \times 10^{22} }{6.022 \times 10^{23}} \ mol \ Ba(NO_3)_2\)

\(0.0880106276984 \ mol \ Ba(NO_3)_2\)

Next, convert moles to grams using the molar mass. The molar mass of barium nitrate is 261.35 grams per mole.

Set up a conversion factor using the molar mass.

\(\frac{ 261.35 \ g \ Ba(NO_3)_2} {1 \ mol \ Ba(NO_3)_2}\)

Multiply by the number of moles we calculated.

\(0.0880106276984 \ mol \ Ba(NO_3)_2 *\frac{ 261.35 \ g \ Ba(NO_3)_2} {1 \ mol \ Ba(NO_3)_2}\)

The units of moles of barium nitrate cancel.

\(0.0880106276984*\frac{ 261.35 \ g \ Ba(NO_3)_2} {1}\)

\(23.001577549 \ g \ Ba(NO_3)_2\)

If this is rounded to the tenths place, the 0 in the hundredth place tells us to leave the 0 in the tenths place.

\(23.0 \ g \ Ba(NO_3)_2\)

The mass of 5.30 ×10²² formula units of barium nitrate is approximately 23.0 grams.

Answer:

The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.

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Answer:

3.34x10¹⁶ molecules of aspirin are in a drop of blood

Explanation:

The recomended dose of aspirin in blood is 100.0μg/mL =

1x10⁻⁴g aspirin / mL of blood.

In a drop (0.100mL) there are:

0.100mL ₓ (1x10⁻⁴g aspirin / mL of blood) = 1x10⁻⁵g aspirin.

Molecular mass of aspirin is:

9C = 12.01g/mol ₓ 9 = 108.09g/mol

8H = 1.01g/mol ₓ 8 = 8.08g/mol

4O = 16g/mol ₓ 4 = 64g/mol

108.09 + 8.08 + 64 = 180.17g/mol

Thus, moles of aspirin in 1x10⁻⁵g are:

1x10⁻⁵g ₓ (1mol / 180.17g) = 5.55x10⁻⁸ moles of aspirin

In 1 mole, you have 6.022x10²³ molecules, thus:

5.55x10⁻⁸ moles of aspirin ₓ (6.022x10²³ molecules / 1 mole ) =

Answer:

(102 900 ÷ 12) + (170 × 1.27) = 8800

Step 1. Evaluate the expressions inside the parentheses (PEMDAS)

102 900 ÷ 12 = 8575

170 × 1.27 = 215.9

In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures.

Thus, the underlined digits are not significant, but we keep them in our calculator to avoid roundoff error.

Step 2. Do the addition (PEMDAS).

  8575

+    215.9

= 8790.9

Everything that you add to an insignificant digit gives an insignificant digit as an answer.

Thus, the underlined digits are not significant.

We must drop them and round up the answer to 8800.

Explanation:

ANSWER

Option C

EXPLANATION

Given that;

In the reaction above, we have the following data

At the reactants side;

3 atoms of manganese

4 atoms of nitrogen

1 atom of sodium

1 atom of fluorine

At the products side

1 atom of manganese

4 atoms of fluorine

3 atoms of sodium

1 atom of nitrogen

To balance the above equation, apply the law of conservation mass

Law of conservation of mass states that matter can neither be created nor destroyed but can e transformed from one formato another.

To balance the equation, 1 mole of Mn3N4 reacts with 12 moles of Na Tto give 3 moles of MnF4 and 4 moles of Na3N

So, the new equation becomes

The following data can be deduced in the above equation

At the reactants side

3 atoms of Mn

4 atoms of N

12 atoms of Na

12 atoms of F

At the products side

3 atoms of Mn

12 atoms of F

12 atoms of Na

4 atoms of N

Looking atthe vabove data, the number of atoms of each element at the reactants side is equal to the number of atoms of same elements at the products side.

Hence, the correct answer is option Ce

u

Answer:

The nucleus consists of 9 protons and 10 neutrons.  Nine electrons occupy available electron shells.

Answer: I remember looking out of the car as we pulled up to the Frantz school.”

“I thought maybe it was Mardi Gras.”

“As we walked through the crowd, I didn’t see any faces.”

“[The school] looked bigger and nicer than my old school.”

“The crowd behind us made me think this was an important place.”

“It must be college, I thought to myself.

Explanation:

“I thought maybe it was Mardi Gras.”

“[The school] looked bigger and nicer than my old school.”

“It must be college, I thought to myself.”

Newton’s second law of motion is a dot product of mass and acceleration, if you remove the table from, under the book, gravity will act on the book and pull it downwards to the centre of the earth

Newton's Second law of motion states that "the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object."

In our case the mass of the book and the force of gravity

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Refer to the attachment

PLEASE HELP!! PLEASE??

Answer:

Soil is a mixture of minerals, dead and living organisms (organic materials), air, and water.

Explanation:

Dead organisms decompose(kind of like fertilizer)

water comes from nearby watersheds, precipitation processes, etc.

Answer:

Soil is made up of three main components – minerals that come from rocks below or nearby, organic matter which is the remains of plants and animals that use the soil, and the living organisms that reside in the soil. The proportion of each of these is important in determining the type of soil that is present.

Answer:

a SINGLE TEASPOON contains 2,300 milligrams of sodium or 2.3 grams!

Explanation:

hope this helps! :)

That oil sands executive is greedy and heartless and therefore can't be trusted when she claims is Ad hominem attack. So, Option B is correct.

4-  The argument in question 4 is an example of an ad hominem attack. This is due to the argument's focus on the character of the oil sands executuive rather than the actual problem, which is how to improve the company's environmental record.

The argument holds that the executive cannot be believed when she says she wants to improve the company's environmental record because she is avaricious and callous. This is an error in logic, though, as the executive's character may not necessarily be related to the company's environmental policies.

5-  The argument in question 5 is an example of an appeal to ignorance. This is because the argument states that there is no proof that humans are causing climate change, so it must be natural causes. Just because there is no conclusive proof that humans are causing climate change, it does not mean that they are not.

The argument assumes that just because there is no evidence to the contrary, the argument must be true. This is a logical fallacy.

So, Option B is correct.

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Answer:

Explanation:

Volume of one mole of a gas = 22.4 litre.

No of molecules in one mole of gas = 6.02 x 10²³ .

Volume of one molecule = 4/3 π R³

= 4/3 x 3.14 x ( 167 x 10⁻¹² m )³

= 19.5 x 10⁶ x 10⁻³⁶ m³

=19.5 x 10⁻³⁰ m³

= 19.5 x 10⁻³⁰ x 10³ litre .

=  19.5 x 10⁻²⁷ litre .

So volume occupied by molecules in one mole of gas

= 19.5 x 10⁻²⁷ x 6.02 x 10²³  litre

117.4 x 10⁻⁴ litre

= .01174 litre.

Excluded volume

= ( 22.4 -  .01174  ) litre .

= 22.388 litre.

Answer:

Option C. Decomposition

Explanation:

To know which option is correct, it is important we know what is a single displacement reaction, double displacement reaction and decomposition reaction.

A Single displacement reaction can be defined as a reaction in which a single element is replaced by another element in a compound.

A double displacement reaction is a reaction involving the exchange of ions of two parts of ionic compounds to form two different compounds.

A decomposition reaction is a reaction in which a compound splits into two or more simpler compound or element.

Bearing the above definitions in mind and considering the question given above, we can conclude that the reaction given in the question above is a decomposition reaction since the compound (NH₄OH) splits into two different compound (NH₃ and H₂O)

Answer: Solar heating systems are energy efficient, but the amount of heating they can accomplish would not be very much in cold climates. Overall, it seems they could be put to good use in a lot of places in the world and could save a lot of energy.

Explanation:

because thats how science works ig

Answer:

Radioactive Decay

Explanation:

To find the volume of hydrogen gas, we can use the ideal gas law equation: PV = nRT. Rearranging the equation to solve for V (volume), we have V = (nRT) / P. Given that n = 28.3 moles, R is the ideal gas constant, T is 297 K, and P is 1.08 atm, we can substitute these values to find the volume.

To determine the volume of hydrogen gas produced, we can use the ideal gas law equation, which states:

PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = moles of gas

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

Given:

n = 28.3 moles

T = 297 K

P = 1.08 atm

Substituting the values into the equation, we can solve for V:

V = (nRT) / P

V = (28.3 moles * 0.0821 L·atm/(mol·K) * 297 K) / 1.08 atm

V ≈ 948 L

Therefore, the volume of hydrogen gas produced is approximately 948 L.

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