The partial pressure of oxygen in the atmosphere is digits. the partial 0.210 atm. Calculate the partial pressure in mm Hg and torr. Round each of your answers to 3 significant digits____mm Hg ____torr

Answer: A.

Explanation:

Brownian motion is the random motion of a particle as a result of collisions with surrounding gaseous molecules. Diffusiophoresis is the movement of a group of particles induced by a concentration gradient. This movement always flows from areas of high concentration to areas of low concentration.

Example:  The movement of pollen grains on still water. Motion of dust motes in a room (though largely influenced by air currents).

Answer: CaCO3 reaction.

Explanation: CaO and  combine together to result in the formation of calcium carbonate compound. we know it is a synthesis reaction.so we can conclude that the most likely products of Cao + co2 → CaCO3 reaction.

The original culture density (OCD) of a sample density would be 1,720,000 colony-forming units per unit volume.

The dilution factor is the ratio of the volume of the original sample to the volume of the final diluted sample. In this case, the final dilution factor is 10^-4, which means that the original sample was diluted by a factor of 10,000.

To calculate the OCD, we use the formula: OCD = CFU / Dilution Factor. In this case, the CFU count is given as 172 and the dilution factor is 10^-4.

Using the formula, OCD = 172 / 10^-4, we can simplify the calculation by converting the dilution factor to a whole number. 10^-4 is equivalent to 1 / 10,000.

Substituting the values, OCD = 172 / (1 / 10,000). Dividing by a fraction is equivalent to multiplying by its reciprocal, so OCD = 172 * 10,000.

Calculating the product, OCD = 1,720,000. Therefore, the original culture density of the sample would be 1,720,000 colony-forming units per unit volume.

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Answer:

lol its D

Explanation:

cuz i know maths

Answer:

D

Explanation:

edge

Answer:

A

Explanation:

the particles in space to be able to move their has to be temperature

The answer is 20.00 moles

Mole is a very important unit of measurement that chemists use.

To calculate the number of moles in 1.204 x 10^24 atoms of zinc, we need to use Avogadro's number, which is 6.022 x 10^23 atoms/mole.

First, we can calculate the number of moles by dividing the number of atoms by Avogadro's number:

1.204 x 10^24 atoms / 6.022 x 10^23 atoms/mole = 20 moles

Therefore, there are 20 moles in 1.204 x 10^24 atoms of zinc.

Since the given value has four significant figures, we should report our answer with four significant figures as well. Therefore, the answer is:

20.00 moles

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The percent of sodium hypochlorite in the bleach sample is 6.29%. Bleach typically contains a solution of sodium hypochlorite, which is a compound that has strong oxidizing properties.

What is Bleach?

Bleach is a chemical solution that is used as a whitening or cleaning agent. It is commonly used to remove stains, whiten fabrics, and disinfect surfaces in households, commercial establishments, and industrial settings.

To calculate the percent of sodium hypochlorite in the bleach sample, we need to use the formula:

percent of sodium hypochlorite = (mass of sodium hypochlorite / mass of bleach sample) x 100%

Using the given values, we can substitute:

percent of sodium hypochlorite = (2.21 g / 35.1 g) x 100%

Simplifying this expression gives:

percent of sodium hypochlorite = 6.29%

Therefore, the percent of sodium hypochlorite in the bleach sample is 6.29%.

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Answer:

There are 0.0364⋅mol

Explanation:

The electron configuration for each of the following elements is provided below along with the symbol of the previous noble gas in brackets to represent the core electrons.1.

The electron configuration of an atom represents the distribution of electrons within the atom's atomic orbitals. Each electron shell is filled with electrons, beginning with the innermost shell, which is closest to the nucleus, and progressing outward. The symbol of the previous noble gas in brackets represents the core electrons.

The electron configuration of Ga, which has atomic number 31, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹ (Ar)The electron configuration of As, which has atomic number 33, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³ (Ar)The electron configuration of Rb, which has atomic number 37, is as follows: 1s²2s²2p⁶3s²3p⁶4s¹ (Kr)The electron configuration of Sn, which has atomic number 50, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p² (Kr)

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Answer:

Sodium is placed in group 1 of the periodic table of Alkali metals, and has a valence shell with one electron, making them very reactive. When placed in water, it disperses heat and begins to ignite and burn (due to its very reactive nature), resulting compound is hydrogen gas (H2), and a very strong base (Sodium Hydroxide, NaOH) used for cleaning appliances and for neutralizing agents.

Silver is placed on the transitional metal section of the periodic table, not quite reactive but is the most conductible element on the planet, is malleable and ductile. Due to it being costly and its rarity, it's not relied on for computer parts or wires. Silver doesn't actually directly react with water in its liquid state. It does produce hydrogen gas and Silver Oxide when reacting with water vapour.

In short, Sodium and water create new products, while Silver and water (only in water's gaseous form) form different products.

Answer: Benzaldahyde

Explanation: the C₆H₅- represents the substituted benzene ring and the

CHO should represent the functional group of aldehyde

Answer:

The name of the compound is benzaldehyde

hope it helps

please mark brainliest

Explanation:

Hi,

The number of protons is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. So, in this case, you have 72 protons and 72 electrons.

I hope this helps :)

If an element has the atomic number 72, then the number of protons is also equal to 72. As it is clearly mentioned in the question that it is a neutral atom, which means the number of protons is equal to the number of electrons which is also 72.

An atomic number may be defined as the number of a chemical element in the modern periodic table through which the elements are systematically arranged in order of increasing the number of protons in the nucleus.

According to the context of this question, the atomic number of every element is always equal to the number of protons it has. While in a neutral atom, the number of electrons is equal to the number of protons. For calculating the number of neutrons, you have to subtract the atomic number from the atomic mass.

Therefore, there are 72 protons of an element whose atomic number is 72. The number of electrons is also 72.

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The name of the compound made of magnesium and fluorine is magnesium fluoride and its formula is MgF2. Magnesium fluoride is a white crystalline solid that has a bitter taste and is insoluble in water. Magnesium fluoride is a stable ionic compound with a high melting point.

This compound is the primary source of magnesium and fluoride ions in many industrial and chemical processes. Magnesium fluoride is produced by the reaction between magnesium oxide and hydrogen fluoride.

MgO + 2HF → MgF2 + H2O

In the laboratory, magnesium fluoride is produced by dissolving magnesium hydroxide in hydrofluoric acid.

Mg(OH)2 + 2HF → MgF2 + 2H2O

Magnesium fluoride is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

Magnesium fluoride is a white crystalline solid with a bitter taste that is insoluble in water. It is the primary source of magnesium and fluoride ions in many industrial and chemical processes. The formula of magnesium fluoride is MgF2. It is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

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Answer: With Earth between the Moon and the Sun.

Explanation: Think about how we  the order of all planet including different moons.

It’s actually B

Explanation:

The catalyst used in the hydrogenation of vegetable oils is a transition metal, commonly nickel, which facilitates the addition of hydrogen atoms to the unsaturated carbon-carbon double bonds in the oil molecules, resulting in a solid product with improved stability and shelf life.

Hydrogenation is a chemical reaction where hydrogen gas (H2) is combined with another substance, often to convert unsaturated molecules into saturated ones. In the case of vegetable oils, hydrogenation is employed to turn liquid oils into solid fats, such as margarine or shortening. This process enhances the stability, shelf life, and melting point of the oils.

The catalyst used in the hydrogenation of vegetable oils is typically a metal, often a transition metal. Common catalysts include nickel, palladium, platinum, and sometimes even rhodium. These metals facilitate the addition of hydrogen atoms to the unsaturated carbon-carbon double bonds found in the vegetable oil molecules. Nickel, being relatively inexpensive and effective, is the most commonly used catalyst in this process.

During the hydrogenation reaction, the vegetable oil is heated and mixed with hydrogen gas. The metal catalyst is introduced, and its presence accelerates the reaction, allowing the hydrogen atoms to be added to the oil molecules efficiently. The result is a product with a higher percentage of saturated fatty acids, leading to its solid state at room temperature.

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Answer:

Yeah

Explanation:

The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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Answer:

Final temperature of water = 31.2° C

Explanation:

Let the final temperature of water be T degrees

Concept: By energy conservation law

Heat lost by the silver = heat gained by water

Heat lost be silver Q1 = m1c1ΔT1

Q1 = 45.2/1000Kg×2.36J/KgK×(101-T)

Heat gained by water Q2 = m2c2ΔT2

Q2 = 300/1000Kg×4.186J/KgK(T-30.6)

Since, Q1=Q2

⇒  45.2/1000Kg×2.36J/KgK×(101-T) = 300/1000Kg×4.186J/KgK(T-30.6)

Solving we get T = 31.2° C

Therefore, final temperature of water = 31.2° C

An isotonic salt solution is 0.90% (w/w) nacl in water many grams of nacl are contained in 1.00 kg of such a solution Reconstruction debate that had federalism debate that had been an issue since the 1790s.

Reconstruction failed by most other measures: Radical Republican legislation ultimately failed to isotonic former slaves from white persecution and failed to engender fundamental changes to the social fabric of the South. When President Rutherford B. federalism debate that had been an issue since the 1790s almost mediately . Hayes removed federal troops from isotonic South in 1877, former Confederate officials and slave returned to With the support of a conservative Supreme Court, these newly empowered white southern politicians passed black codes, voter qualifications, and other anti-progressive legislation to reverse the rights that blacks had gained during Radical Reconstruction. The U.S. Supreme Court bolstered this federalism anti-progressive movement federalism  with decisions in the Slaughterhouse Cases, the Civil Rights Cases, and United States v.

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A. Plugging in the values for this reaction we get 0.096. and B. Plugging in the values for this reaction we get 0.014.

Equilibrium is a state of balance between two or more competing forces. It is a situation in which all forces and influences are canceled out, resulting in a stable, balanced system. In economics, equilibrium refers to a situation where the forces of supply and demand are equal, resulting in no tendency for prices or quantities to change.

A. The equilibrium constant, K, can be calculated using the equation: K = \(e^{(-\Delta Hf/RT)\), where R is the ideal gas constant, T is the temperature in Kelvin, and \(\Delta Hf\) is the standard enthalpy of formation for the product. Plugging in the values for this reaction we get:
\(K = e^{(-(9.16 kJ/mol)/(8.314 J/K\times mol)(685 K))} = 0.096.\)

B. The equilibrium constant for this reaction can be calculated using the equation: \(K = e^{(-\Delta H f/RT + \Delta Sf/R),\)
where R is the ideal gas constant, T is the temperature in Kelvin, ΔH∘f is the standard enthalpy of formation for the product, and
ΔS∘f is the standard entropy of formation for the product.
Plugging in the values for this reaction we get:
\(K = e^{(-(14.6 kJ/mol)/(8.314 J/K·mol)(685 K) + (240.0 J/mol)/(8.314 J/K·mol))} = 0.014.\)

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Answer:

1s2, 2s2, 2p6, 3s2, 3p2

Explanation:

see the guide on the given electron configuration examples

Explanation:

A. Cl⁻

B. Na⁺

C. Mg⁺⁺ Or Mg²⁺

D. O²⁻

E. Al³⁺

F. N³⁻

G. Be²⁺

H. Ne (No charge because it's an noble element)

The chemical equation is said to be balanced if the number of the atom of the reactant element is equal to that of the product. In balancing the reactions, subscripts in a formula are never changed. Thus, option b is correct.

A balanced chemical reaction is a representation of the elements along with their coefficients and charges in a proportional manner on the reactant and the product side.

To balance a reaction the coefficients for the reactants and products are varied, followed by the law of conservation of matter. In balancing the subscripts in the elemental formula are never changed.  

Therefore, option b. the subscripts of the elemental formula are never changed.

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2.95 x 10²⁰ caffeine molecules are in one cup of coffee that contains 95.0 mg of caffeine.

The molar mass of the substance is the mass in grams of the one mole of the substance. As proven here, we can gain a substance's molar mass with the aid of summing the molar hundreds of its issue atoms.

We are able to then use the calculated molar mass to convert between mass and variety of moles of the substance.

SOLUTION:

Mass of Caffeine = 95 mg = 95 x 10⁻³

Molar Mass of Caffeine = 194 g/mol

Mole of caffeine = mass of caffeine / molar mass of caffeine

= 95 x 10⁻³ / 194 = 4.897 x 10⁻⁴ mole

Number of caffeine = mole x NA

= 4.897 x 10⁻⁴  x 6 .022 x 10²³

= 2.95 x 10²⁰ molecules

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The equilibrium constant for the reaction Cu2+(aq)+Zn(s)→Cu(s)+Zn2+(aq) at 25 °C is 4.96 × 10^15.

The standard electrode potentials for Cu2+/Cu and Zn2+/Zn half cells are +0.34 V and -0.76 V, respectively. Using these standard electrode potentials, let us calculate ΔG∘ and use its value to estimate the equilibrium constant for the following reaction:Cu2+(aq)+Zn(s)→Cu(s)+Zn2+(aq)The standard electrode potential for Cu2+/Cu half cell is +0.34 VThe standard electrode potential for Zn2+/Zn half cell is -0.76 V.

The value of ΔG∘ can be calculated as follows:ΔG∘= -n FE ∘cell Where, n is the number of electrons exchanged, F is the Faraday constant and E∘ cell is the standard cell potential. Substituting the values, we getΔG∘= -2 × 96485 × (1.1) = -212118.7 J/mol = -212.12 kJ/mol The equilibrium constant Kc can be obtained from the relationshipΔG∘= -RT ln Kc where, R is the gas constant and T is the temperature in Kelvin.

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\(\qquad\qquad\huge\underline{{\sf Answer}}\)

In 1 molecule of \( \sf{(NH_4)_2SO_3} \) has 3 molecules of Oxygen. but it is given that the sample contain 6000 Oxygen atoms. therefore, the number of molecules in the sample is ~

\(\qquad \sf  \dashrightarrow \: \dfrac{6000}{3} \)

\(\qquad \sf  \dashrightarrow \: 2000 \: \:molecules\)

Now, there are 8 atoms of Hydrogen in each molecule, so total number of H - atoms in 2000 molecules of the given compound would have ~

\(\qquad \sf  \dashrightarrow \: 2000 \times 8\)

\(\qquad \sf  \dashrightarrow \: 16000 \: \: H-atoms\)

Atomic orbitals are the areas to the left and right of the dashed lines. The possible molecular orbitals that they can form are indicated by the dashed lines.

Normally, in diatomic molecular orbitals, the atomic orbitals with the closest energy level can overlap with each other and form molecular orbitals. Therefore, the atomic orbitals generally tend to overlap one by one from the lowest potential energy to the highest potential energy. For example, in a homonuclear diatomic molecule, which means that both atoms are the same element, the same orbitals will overlap together and form molecular orbitals.

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