Plz help ASAP


The charge on oxide is 0-2

What is it for monoxide

Answer:

Protons = 89

Neutrons = 142

Electrons = 89

Option C

Explanation:

Hello,

Were required to find the proton, neutron and electron of an element Y

The atomic mass of element Y is composed of the protons and neutrons while the atomic number is the exact amount of protons present in the element.

Element = ₈₉²³¹Y

Atomic number = 89

Number of protons = 89

Number of electrons = 89

Atomic mass = 231

Atomic mass = protons + neutrons

231 = 89 + neutrons

Neutrons = 231 - 89

Neutrons = 142

Therefore the number of protons is 89, number of neutrons is 142 and number of electrons is 89.

Note: for an electrically neutral atom, the number of protons must be equal to the number of electrons

When 20.87 g of propane is combusted in excess oxygen 62.577g of co2 are produced and 75.89grams of o2 are consumed

What are combustion reactions?

combustion is a chemical reaction between two or more chemicals, usually involving oxygen, that produces heat and light in the form of a flame. When a material reacts quickly with oxygen, a combustion reaction happens (O2).

During the combustion of propane the following reaction occurs:

C3H8(g)+5O2(g)→3CO2(g)+4H2O(l)

We know that the combustion of 1 mole of propane gives 3 moles of carbon dioxide.

= 20.87 g/44.10⋅g⋅mol−1=0.473⋅mol

And since, per the stoichiometric equation, if 0.200⋅mol propane is completely combusted, 3×0.473mol×44.10⋅g⋅mol−1=62.5779g

Oxygen consumed can be considered as x

44x=20.87x160=75.89g

Therefore when 20.87 g of propane is combusted in excess oxygen 62.577g of co2 are produced and 75.89grams of o2 are consumed.

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The empirical of the compound would be  \(Pb_4Cl\)

The compound contains chlorine and lead according to the following percentages:

Pb = 59.37

Cl = 100 - 59.37 = 40.63

Converting the percentages to moles:

Pb = 59.37/207.2 = 0.29 mol

Cl = 40.63/35.5 = 1.14 mol

Dividing by the smallest:

Cl = 0.29/0.29 = 1

Pb = 1.14/0.29 = 4

Empirical formula = \(Pb_4Cl\)

In other words, the empirical formula is  \(Pb_4Cl\).

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Answer:

name,atomic mass,electrons,protons,same,charge,amount,atomic mass,charge,neutrons,atomic number,atomic mass

The set of numbers used to explain the position and energy of the electron in an atom are called quantum numbers.

There are four quantum numbers, namely, principal, azimuthal, magnetic and spin quantum numbers.

Quantum numbers are the set of numbers used to explain the location and electricity of an electron in an atom. There are four sorts of quantum numbers: foremost, azimuthal, magnetic, and spin. Quantum numbers represent the values of a quantum gadget's conserved portions.

The first quantum range is called the principal quantum number. The important quantum range largely determines the electricity of an electron. Electrons in the equal atom that have the identical foremost quantum variety are said to occupy an electron shell of the atom.

Quantum physics is the observe of depend and strength on the maximum essential stage. It pursuits to discover the residences and behaviors of the very constructing blocks of nature. at the same time as many quantum experiments examine very small gadgets, inclusive of electrons and photons, quantum phenomena are all round us, acting on each scale.

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Answer:

Maybe somewhere close to 12 L?

Total heat generated by 2 mole of TiO2(s) is 4.963kJ.

The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.

The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,

q = 2.89 * 25 * 683.697

=> 4963.35

In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.

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Complete question :

determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Explanation:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Answer:

Hydrocarbons

Explanation:

They all are made up of only carbon and hydrogen atoms, so they're organic molecules known as hydrocarbons. Decane and Heptane are alkanes, Propene is an alkene.

Equilibrium constant is a measure of the extent of a chemical reaction.

It is a ratio of the concentrations of products to reactants at a particular temperature and pressure, with each concentration raised to the power of its stoichiometric coefficient. The value of the equilibrium constant is dependent on temperature. As the temperature changes, the equilibrium shifts, and so does the value of the equilibrium constant.
In this case, the given equilibrium constant at 298 K is 4.9 × 10−6. To determine the value of the equilibrium constant at 373 K, we need to use the Van't Hoff equation, which relates the equilibrium constant at different temperatures:
ln(K2/K1) = ΔH/R [(1/T1) - (1/T2)]
where K1 is the equilibrium constant at the initial temperature (298 K), K2 is the equilibrium constant at the final temperature (373 K), ΔH is the enthalpy change of the reaction, R is the gas constant, T1 is the initial temperature, and T2 is the final temperature.

Assuming that the enthalpy change of the reaction is constant over the temperature range, we can solve for K2:

ln(K2/4.9 × 10−6) = ΔH/R [(1/298 K) - (1/373 K)]

K2 = 2.14 × 10−5

Therefore, the value of the equilibrium constant at 373 K is 2.14 × 10−5. As the temperature increased, the equilibrium shifted towards the products, resulting in a higher value of the equilibrium constant.

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Answer:

B

Explanation:

Lets see here, Gravity is pulling you down but your body is repelling to gravity. Meaning that gravity is pulling down your weight and the scale is reading it.

Hope this helped!

Answer:

Francium is the answer

Answer:You have it right the answer is c!

Explanation:

Answer:

c ........................!

Dilution is a process of making a less concentrated solution by adding more solvent. Dilution refers to the reduction of the concentration of a solution. This is done by adding more solvent, without adding more solute. The correct option is D, the amount of solvent remains unchanged.

Thus, the concentration of solute decreases.When a solution is diluted, the amount of solvent increases. However, the amount of solute remains the same. Therefore, the concentration of the solution is reduced. The decrease in concentration is proportional to the increase in the volume of the solution.

The amount of solvent remains unchanged. When a solution is diluted, the amount of solute remains the same. However, the volume of the solution increases. Therefore, the concentration of the solution is reduced. The amount of solvent changes in direct proportion to the change in volume.

This means that as the volume increases, the amount of solvent also increases. In summary, dilution is a process of making a less concentrated solution by adding more solvent. When a solution is diluted, the amount of solute remains the same, but the volume of the solution increases, causing the concentration of the solute to decrease. The amount of solvent changes in direct proportion to the change in volume.

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Answer:

unable to compute

Explanation:

There are three ways to find similarities in nucleotide and amino acid sequences they are Sequence Identity, Coverage and E-Value.

Proteins and amino acids share characteristics with nucleotides and nucleic acids. Nucleic acids, such as DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are constructed from monomers known as nucleotides, much like proteins are composed of a variety of amino acids. Sequence The percentage of overlapping, matching sites between two matched sequences is known as identity. It can be written as a percentage or as a fraction [0.0, 1.0]. The percentage of one sequence that is "covered by" (overlapped by) another sequence is known as coverage. Sequence B only covers 80% of Sequence A in the example above, while Sequence A covers 100% of Sequence B. (because of the two gaps). Similarity filters frequently examine the minimal "bi-directional" coverage (the lower of the two metrics).

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This ranking is based on the electromagnetic spectrum, which describes the different types of radiation in order of their wavelength and frequency. As the wavelength decreases, the frequency and energy of the radiation increases. Gamma rays have the highest energy and shortest wavelength, while radio waves have the lowest energy and longest wavelength.

What is Radiation?

Radiation refers to the energy that travels through space or matter in the form of electromagnetic waves or particles. There are several types of radiation, including electromagnetic radiation, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, as well as particle radiation.

Electromagnetic radiation is characterized by its wavelength and frequency, which determines its energy and the type of radiation.

Here is the correct ranking of the types of radiation in order of their energy, from least to greatest:

Red (FM-Radio-AM): Longest wavelength/lowest energy

Orange (Microwave)

Yellow (Infrared)

Rainbow (Visible light)

Blue/green (Ultraviolet)

Blue (X-rays)

Purple (Gamma rays): Shortest wavelength/greatest energy

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The name for the ionic compound pu(oh)3  is Plutonium(III) hydroxide.

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I wrote it out as it was easier to visualise that way, youll need to tap to see the full pic. feel free to comment if u have qns :)

Answer:

So, to convert between moles and grams, use the molar mass of the two compounds. If one mole of carbon monoxide has a mass of 28.01 g and one mole of carbon dioxide has a mass of 44.01 g , it follows that the reaction produces 44.01 g of carbon dioxide for every 28.01 g of carbon monoxide.

Answer:

2.99

Explanation:

:)

Explanation:

Unordered items;  

          cell, elephant, human body, school bus, organ ,molecule.

This problem deals with the organization of life. We move from cells, to tissues, organs, and then systems.

       Molecule

        Cell

        Organ

        Human body

        Elephant

        School bus

School bus is the largest from the giving items although it is non-living.

\(4.05 * 10 ^{4}\)

To find the pressure in kPa we use the conversion

1 atm = 101.3 kPa

If 1 atm = 101.3 kPa

400 atm = 400 × 101.3 = 40520 kPa

Expressing it in standard form we have the final answer as

4.05 × 10⁴ kPa

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimeter of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

P = F / A

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Answer:

Germanium and Polonium

Explanation:

Can you please mark me brainliest since I was the first person to answer :p

Answer:

Boron and silicon are metalloids.

Hope it helps :)

Answer:

A) 10.13 is the answer

Explanation:

Since HCl is a strong acid, its pH can be found by simply plugging it into the equation:

pH = -log[H+]

*H+ is just the concentration you were given*

Now that you have the pH, you just subtract it from 14 to find the pOH

I have attatched my work below. Hope this helps! :^)

To find the pOH of a solution, you can use the formula: pOH = -log10[OH-]

pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. It is the negative logarithm (base 10) of the hydroxide ion concentration.

In this case, since we have hydrochloric acid (HCl), we need to consider the concentration of hydroxide ions (OH-) produced when HCl dissociates in water.

HCl is a strong acid and completely dissociates, meaning it produces an equal concentration of hydrogen ions (H+) and chloride ions (Cl-) in water. Since there are no hydroxide ions produced, the concentration of hydroxide ions is 0.

Therefore, the pOH of a hydrochloric acid solution is 0, and none of the options provided (A, B, C, D) is the correct answer.

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Answer:

Explanation:

In which step of the four-stroke engine cycle does the car release CO₂, H₂O, and CO?

O C. Exhaust

Answer:

Catalase

Explanation:

These reactive oxygen specie or free radicals that cause damage or injury to cells also lead to oxidative stress if unchecked by antioxidants. As suggested in the question, there are several enzymes that act as antioxidants in mitigating the effects of these reactive oxygen specie or free radicals. These enzymes include catalase, superoxide dismutase and glutathiones (such as glutathione s-transferase).

The enzyme that however prevents the accumulation of hydrogen peroxide (H₂O₂) in the peroxisome is catalase. Catalase is an enzyme that is present in the peroxisome; it (catalase) detoxifies/acts on H₂O₂, converting it (H₂O₂) into water and oxygen.

Explanation:

Y has 13 protons and we know that Aluminium (Al) too has 13 protons.

So , element Y = Aluminium

• In an element , no. of protons = no. of electrons. So , Y has 13 electrons.

• Mass no. of Y (Aluminium) = 27.

• Also we know that ,

Mass number = no. of protons + no. of neutrons

So,

No. of neutrons = 27 - 13 = 14

• Valence electrons are the electrons which are present in the outermost shell of an element.

Electronic Configuration of Y = 2,8,3

So, Y has 3 valence electrons.

• We know that Y is Aluminium & Aluminium is a metal. So , Y is a metal.

• Valency of Y = +3