the oxidation number of a phosphorus atom in p₄ is?

Answer:

A- 8

B- 8

C- O

D- 26

E- 30

F- Fe

Explanation:

Answer:

C

Explanation:

The student is incorrect.

The atmosphere weighs very little compared to the material the earth is made of. Gravity is effected by mass. The more mass, the more gravity. The only correct (and it is totally correct) answer is C

Answer: 4. We know that one mole of any chemical compound always contains 6.022 x 10^23 molecules. Therefore, we can calculate the number of molecules of 2.25 moles of sulfur dioxide SO2 by multiplying the number of moles by the Avogadro's constant 6.022 x 10^23:    

    2.25 moles SO2 (6.022x10^23 molecules/1mole) = 1.355 x 10^24 molecules of sulfur dioxide

5. The number of moles of sodium chloride are 0.40 moles

Explanation:

When the child sits on the partially filled balloon, the pressure of the balloon increases. The pressure change is a doubling of the initial pressure, indicating a factor of 2 increase.

When the child sits on a partially filled balloon, the volume of the balloon decreases by half. According to Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume at constant temperature, the pressure inside the balloon increases.

Let's consider the initial volume of the balloon as V and the initial pressure as P. When the volume decreases by half, it becomes V/2. Since the amount of gas remains constant, the pressure increases to maintain equilibrium. The new pressure can be denoted as P'.

According to Boyle's Law, P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume. Plugging in the values, we have P * V = P' * (V/2).

Simplifying the equation, we get P' = 2P. This means the pressure of the balloon increases by a factor of 2, or it doubles. So, the pressure change can be expressed as an increase of two times the original pressure.

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Sugar is composed of molecules with covalent bonds of different types. The primary type of covalent bond found in sugar is a glycosidic bond, which is a type of covalent bond that connects two monosaccharides.

Monosaccharides are the building blocks of sugars and are composed of carbon, hydrogen, and oxygen atoms. A glycosidic bond is formed when an oxygen atom found in one monosaccharide bonds with a hydrogen atom found in another monosaccharide. This type of covalent bond is what holds the two monosaccharides together and forms a sugar molecule. Hydrogen bonds occur when a hydrogen atom is shared between two electronegative atoms (such as oxygen or nitrogen). This creates a weak bond that is still strong enough to hold molecules together. In the case of sugar, the hydrogen bonds are formed between the hydrogen atoms of the different sugar molecules, helping to keep them connected.

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Answer:

The planets follow these orbit  paths as they travel around the Sun. The Sun’s gravity  

makes the planets move in this way. It pulls on the planets, keeping them in motion in their orbit.

Modeling is a way to see ideas or have a  particular idea or

concept.

 Models do have some lines .

 Often a model is made with certain things.

 A model of the solar system may contain all of the planets and the Sun, but it may not include the planets’

individual moons or every planit  and rock in the solar system.

Explanation: if you think about it and and look at pics it is easy

hope this helps

The total number of sigma bonds and lone pairs is four, the hybridization of Al is sp3.

In the first molecule, the central Al atom with a negative charge is bonded to four Cl atoms, each of which has three lone pairs of electrons. To determine the hybridization of the central atom, we count the number of sigma bonds and lone pairs around it. Here, Al is bonded to four Cl atoms and has no lone pairs. Since the total number of sigma bonds and lone pairs is four, the hybridization of Al is sp3.

In the second molecule, the central C atom is double bonded to two S atoms, and each S atom has two lone pairs. Again, we count the number of sigma bonds and lone pairs. Here, the central C atom is bonded to two S atoms (two sigma bonds) and has no lone pairs. Therefore, the hybridization of C is sp.

In the third molecule, the central P atom with a lone pair is bonded to three F atoms, and each F atom has three lone pairs. The central P atom is bonded to three F atoms (three sigma bonds) and has one lone pair. Thus, the hybridization of P is sp3.

The hybridization of the central atoms in the given molecules are as follows:

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HF, HCl, HBr, HI, and HAt are the hydrohalic acids in order of strength from weakest to strongest.

Many hydrohalic acids are hydrohalic acid (chemistry) any acid that results from the binary combination of a halogen and hydrogen. In chemistry, hydrogen halides, which act as Arrhenius acids when in the aqueous phase, are diatomic inorganic compounds. HX is the formula, where X is one of the halogens, such as astatine, fluorine, chlorine, bromine, or iodine. At Standard Temperature and Pressure, all known hydrogen halides are gases.

Hydrogen halides are widely used to describe hydrohalic acids that react with water to form acids. The halogens' formula, HX, allows them to all be used for X. These are organic molecules with two atoms. Among the halogens are iodine, chlorine, bromine, and fluorine. The acid hydrofluoric acid (HF) is not a powerful acid. Since it partially dissociates in water, it is characterized as a weak acid.

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Explanation:

Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. ... The carbon-14 method was developed by the American physicist Willard F.

The given sample of matter has the lowest average kinetic energy is 50g at -55°C and 2.0 atm option - A is correct answer.

The force an object experiences as a result of motion is known as kinetic energy. An object can only accelerate if a force is applied to it. We have to put in the effort to use force. Once the work is done, energy is transferred to the object, which then moves at a new, constant speed.

Kinetic energy, which can be seen in the motion of an object or subatomic particle, is the energy of motion.

The average kinetic energy is the subject of the query. Thus, the only connection is to temperature. Kinetic energy increases with increasing temperature and decreases with decreasing temperature.

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Answer:

the arrow (single arrow) means that all the reactants are going to products.

The coefficient that would go in front of H2 is 2.

The chemical equation that represents the reaction between Pb and RbOH to form Rb2PbO2 and H2 is:

Pb + 2RbOH → Rb2PbO2 + H2

In the equation, the coefficients of Pb, RbOH, Rb2PbO2, and H2 are 1, 2, 1, and an unknown coefficient x, respectively.

To balance the equation, we first write the skeleton equation.

Pb + RbOH → Rb2PbO2 + H2

The reaction has one Pb, one Rb, one O, and one H on both the reactant and product side.

However, the reaction has two OH on the reactant side and two O on the product side.

To balance these atoms, we place a coefficient of 2 in front of the RbOH on the reactant side and a coefficient of 2 in front of the H2 on the product side.

This gives:

Pb + 2RbOH → Rb2PbO2 + 2H2

Therefore, the coefficient that would go in front of H2 is 2.

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Answer:

0.03262841

I tried, hope this helps :)

Answer:

0.032 lbs

Explanation:

Divide the mass value by 454.

You should use a pencil instead of a pen when marking on a thin layer chromatography plate because the components of pen ink will separate along with your sample, while pencil lead will not. So, the correct answer is b.

Using a pen to mark on a thin layer chromatography plate can cause the ink components to mix with the sample components, making it difficult to accurately analyze the separation of the components. Pencil lead, on the other hand, is inert and will not interfere with the separation process.

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The mass of an atom with an excited state of argon-42, which is 1.208 MeV above its ground state, can be calculated by subtracting the energy difference from the atomic mass of the ground state.

The atomic mass of the ground state of argon-42 is given as 41.963046u. The excited state of the isotope is 1.208 MeV (million electron volts) above the ground state. To calculate the mass of the atom in the excited state, we need to account for the energy difference.

Since mass and energy are related through Einstein's famous equation, \(E=mc^2\), we can convert the energy difference from MeV to atomic mass units (u) by using the conversion factor 1u = 931.5 MeV/c². Thus, the energy difference is 1.208 MeV / 931.5 MeV/c² = 0.0012984u.

To find the mass of the atom in the excited state, we subtract the energy difference from the atomic mass of the ground state: 41.963046u - 0.0012984u = 41.9617476u.

Therefore, the mass of the atom when the nucleus is in the excited state is approximately 41.9617476u.

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Answer:

M2 = 0.95M

Explanation:

M1V1 = M2V2

(1.9)(0.5) = M2(1)

M2 = 0.95M

Answer:

fossil fuels are an  nonrenewable resource that people are hoping to replace with renewable resources

Explanation:

When using a 50 ml graduated cylinder, you should record the volume to the nearest tenth of a milliliter.

The 50 mL graduated cylinder is an essential piece of laboratory equipment used to measure the volume of liquids accurately. Graduated cylinders are designed with markings that show the volume of liquid in milliliters (mL). To accurately record the volume of liquid in a 50 mL graduated cylinder, you should use the markings on the cylinder to determine the nearest tenth of a milliliter.

When taking readings, read at eye level, which is called the meniscus. The meniscus is the curved surface of a liquid where it meets the container. You should read the graduated cylinder from the lowest point of the meniscus. When using a 50 mL graduated cylinder, you should record the volume to the nearest tenth of a milliliter. Therefore, if the reading on the cylinder is 20.43 mL, the recorded volume should be 20.4 mL.

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Answer:

Characteristics: Krypton is a colorless, odorless, inert gas. Although it is extremely unreactive krypton can react with the very reactive gas fluorine. A few compounds of krypton have been prepared, including krypton (II) fluoride and krypton clathrates. It has a boiling point of -152.9°C (-243.2°F) and a density of 3.64 grams per liter.

Explanation:

Interesting Facts about Krypton

Abundance and Isotopes

The balanced redox equation for \(Cu(s)\) and \(MnO_4-(aq)\) in acidic solution is \(5Cu(s) + 2MnO_4-(aq) + 16H+(aq) \rightarrow 5Cu_2+(aq) + 2Mn_2+(aq) + 8H_2O(l)\).

First, let's write out the half-reactions:

Next, we need to balance the number of electrons transferred in each half-reaction. We can do this by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:

Now, we can add the two half-reactions together and cancel out any species that appear on both sides of the equation:

\(5Cu(s) + 2MnO_4-(aq) + 16H+(aq) \rightarrow 5Cu_2+(aq) + 2Mn_2+(aq) + 8H_2O(l)\)

Finally, we can simplify the coefficients by dividing each one by the greatest common factor, which is 2 in this case:

\(5Cu(s) + 2MnO_4-(aq) + 16H+(aq) \rightarrow 5Cu_2+(aq) + 2Mn_2+(aq) + 8H_2O(l)\)

So, the balanced equation is:

\(5Cu(s) + 2MnO_4-(aq) + 16H+(aq) \rightarrow 5Cu_2+(aq) + 2Mn_2+(aq) + 8H_2O(l)\)

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The type of interaction that stabilizes the alpha (α) helix and the beta (β) pleated sheet structures of proteins is called hydrogen bonding.

Hydrogen holding is an extraordinary sort of dipole fascination between particles, not a covalent cling to a hydrogen iota. It results from the appealing power between a hydrogen particle covalently clung to an extremely electronegative molecule like a N, O, or F iota and another exceptionally electronegative iota.

Hydrogen bonds can occur in any molecule that has a hydrogen atom directly attached to an oxygen or nitrogen. When hydrogen is bonded to fluorine, hydrogen bonds also occur, but other molecules lack the HF group.

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The central atom is a gallium atom, which has the symbol Ga.

What is Lone pair?

An electron pair in an atom's outermost shell that isn't shared with or bonded to another atom is known as a lone pair. Another name for it is a non-bonding pair. Making a Lewis structure is one approach to spot a lone pair. The amount of valence electrons in an atom is equal to the sum of the number of lone pair electrons and the number of bonding electrons. The lone pair idea is crucial to the valence shell electron pair repulsion (VSEPR) theory because it clarifies the molecule's shape.

According to the octet rule, an atom must have 8 electrons in the valence layer to achieve electrical stability.

These atoms can achieve this stability through covalent or ionic bonds.

According to the above question, we can state that an X atom received 6 electrons, as three oxygen atoms shared 2 atoms each with the X atom.

In this case, the atom x must have 2 atoms in the valence layer, to reach 8 atoms with the bonds it made with the oxygens.

Among the response options, Ga is the only one that has 2 electrons in the valence layer, being able to form bonds with oxygen.

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Answer:

A. 20

B. 40

C .calcium (CA)

D. 10

E.9

F. fluorine ( f)

Electronegativity for boron is 2.0, and electronegativity for fluorine is 4.0. which type of bond forms between boron (B) and fluorine (F) in BF₃ is non polar covalent bond.

The  BF₃ is the covalent molecule. the electronegativity for boron is 2.0 and the electronegativity for the fluorine is 4.0 . the boron has 3 valence electrons and need 5 more to complete the octet and fluorine has 7 valence electrons . thus boron form three covalent bond with the atom of fluorine and try to complete the octet.

The  BF₃ is a triangular planar molecule. the dipole moment in the  BF₃ molecule is zero therefore  BF₃, boron trifluoride is a non polar covalent molecule.

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The equation in terms of ttt that models the situation:

\(N(ttt) = 800800800(\frac{1}{2})^{\frac{ttt}{141414} }\)

N(t) = 800800800 × (1/2)^(t/141414) or

\(N(ttt) = 800800800(\frac{1}{2})^{\frac{ttt}{141414} }\)

N(ttt) = 800800800 * (1/2)^(ttt/141414)

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Answer:

The chemicals differ depending on what the surrounding area is like.

Answer:

200

Explanation:

23 rounds down to 20

7 rounds up to 10

20 times 10 equals 200

Answer:

Explanation:

7 carbon atoms, 6 hydrogen atoms,9 NO2 atoms

7+6+9=22

2(22)=44

44 atoms

Answer:

c. Olivia will have less energy or motion

Explanation:

none of the others .are sense