If an element has 89 protons and mass of 156, how many electrons would it have

At 46.40 degrees Celsius and 897.00 mmHg, 6.20 liters of oxygen gas will contain a mass of 26.37 grams.

Oxygen is an element that is essential to life as we know it. It is a colorless, odorless, tasteless gas that makes up about 21% of the Earth's atmosphere. In its natural form, oxygen is made up of molecules of two oxygen atoms bonded together. Oxygen is vital to all living organisms, including humans, and is necessary for respiration and combustion. Oxygen plays a major role in many chemical processes, such as the burning of fuel, the corrosion of metals, and the formation of acids and bases. It is also an important component of environmental cycles, such as the water cycle and the carbon cycle.

897.00 mmHg = 897.00 mmHg × (1 atm / 760 mmHg) ≈ 1.17934 atm

46.40 °C + 273.15 = 319.55 K

Now, let's rearrange the ideal gas law equation to solve for the number of moles (n):

n = PV / RT

Plugging in the given values:

n = (1.17934 atm × 6.20 L) / (0.0821 Latm/molK × 319.55 K)

Simplifying the equation, we find:

n ≈ 0.2839 moles

To calculate the mass of O₂ gas, we need to multiply the number of moles by the molar mass of O₂:

Molar mass of O₂ = 32.00 g/mol

Mass of O₂ = 0.2839 moles × 32.00 g/mol ≈ 9.0928 g

Therefore, there are approximately 9.0928 grams of O₂ gas in the 6.20 L container at a pressure of 897.00 mmHg and a temperature of 46.40°C.

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Answer:

I also think it's c but i am not sure

Answer:

january

Explanation:

it is in january

When performing an extraction between an aqueous solution and an organic solution or organic compound, density will determine the layer ending up at the bottom of the separation funnel.

In chemistry, a separatory funnel is a kind of funnel that separates two immiscible liquids.

It is a transparent funnel and when two immiscible liquids i.e aqueous and organic solution is poured into it, and then allowed to stand, after a while a distinguished layer is formed setting them apart from each other.

Due to the difference in density, the extraction becomes easier as the aqueous layer has a low density and stays at the top while the organic layer is at the bottom.

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Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ

To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.

First, we convert the volume of water from milliliters to grams:

100 mL × 1 g/1 mL = 100 g

Then, we calculate the number of moles of water:

100 g × 1 mol/18.02 g = 5.548 mol

Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:

5.548 mol × 4.186 kJ/mol = 23.2 kJ

Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

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Answer:

solvent solutions

Explanation:

.............

Answer:

Flammable liquid is any liquid having a flashpoint at or below 199.4 °F (93 °C).

Explanation:

:)

Flashpoints for flammable liquids are at 100°F. Lower flash points allow for easier ignition of liquids. A liquid's flash point is the lowest temperature at which a concentrated enough layer of vapor accumulates on top of its surface to allow for ignition.

A liquid that is flammable has a flash point* below 37.8 ° C (100 ° F). A flammable liquid has a flash point that ranges from 37.8 to 93.3° C (100 to 200° F), which is above the standard working temperature. Flammable liquids emit a vapor that, at standard working temperatures, is easily ignitable.

The substance ignites more readily the lower the flash point. For instance, petrol is more flammable than ethylene glycol and has a flash point of about -40 degrees C (-40 °F).

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Protons may determine the identity of an element, but it is the electrons that rule its reactivity. The number of protons in an atom's nucleus gives it a unique atomic number, which defines its place on the periodic table and determines its fundamental properties.

It is the number and arrangement of electrons in an atom's outermost energy level that determines its chemical behavior. This is because electrons are involved in chemical reactions, forming and breaking chemical bonds to create new substances.

Atoms with full outer electron shells tend to be stable and unreactive, while those with partially filled shells are more likely to form chemical bonds in order to achieve a stable configuration. Elements that are close to each other on the periodic table often have similar outer electron configurations and therefore exhibit similar chemical properties.

Understanding the reactivity of elements is essential in many areas of chemistry, including designing new drugs, creating new materials, and developing sustainable energy sources.

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The right response is D. the length of one compression and rarefaction.

A wave's wavelength is the separation between two adjacent locations that are in phase with one another. It is the actual distance covered by a single wave cycle.

Hence, one compression and one rarefaction are identical in length to one wavelength.

In a longitudinal wave, the medium's particles vibrate perpendicular to the wave's direction of propagation. In the medium, this causes areas of compression and rarefaction. One wavelength is equal to the space between any two compressions or rarefactions that follow one another.

You can mark a spot on a medium and measure the distance between it and the following point that reaches the same phase of a longitudinal wave to determine its wavelength (either a compression or a rarefaction). To get a more precise measurement, you can then repeat this process numerous times and take an average.

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The diffusion coefficient for the BCC iron sheet is approximately 2.1 * 10^-11 m^2/s at 725°C.

To calculate the diffusion coefficient (D) for the BCC iron sheet, you can use Fick's first law of diffusion, which is given by:

J = -D * (dC/dx)

where J is the diffusion flux (1.4 * 10^-8 kg/m^2s), dC is the change in carbon concentration (0.011 - 0.0073 wt% = 0.0037 wt%), and dx is the thickness of the sheet (2.2 mm = 0.0022 m).

Rearranging the formula to solve for D, we have:

D = -J / (dC/dx)

Now, you need to convert the change in carbon concentration to kg/m^3. Assuming the density of iron is 7874 kg/m^3, we have:

dC = 0.0037 wt% * 7874 kg/m^3 = 291.338 kg/m^3

Now, substitute the values into the equation:

D = -(1.4 * 10^-8 kg/m^2s) / (291.338 kg/m^3 / 0.0022 m)

D ≈ 2.1 * 10^-11 m^2/s

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The number of calories required for 47.5g of Al to go from 25 to 62 is 3,689.9 cal.

Calories are a measure of energy. They are the amount of energy that is released when food is digested, broken down and converted into energy for the body to use. The energy from calories is used to fuel physical activities, as well as all the bodily functions that keep us alive. Eating food is the main source of calories, although some drinks also contain calories. Different types of food contain different amounts of calories. Foods that are high in fat and sugar tend to contain more calories.

Calories (cal) = Heat (J) / 4.184
Heat (J) = Mass (g) x Specific Heat (J/g C) x Change in Temperature (C)
Heat (J) = 47.5g x 0.900 J/g C x (62 - 25) C
Heat (J) = 15,495 J
Calories (cal) = 15,495 J / 4.184
Calories (cal) = 3,689.9 cal.

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Answer:

a)calcium nitrate + hydrogen

b) sodium sulfate+ water.

c)barium chloride +carbon dioxide+hydrogen

d) magnesium phosphate +water

e) chlorine+aluminum = aluminum chloride + water

f) potassium bicarbonate +sulphuric acid=potassium sulfate +water +carbon dioxide

Answer:

The awnser is a single called organism

Explanation:

The above picture shows a a single-celled organism. Specifically, it is a protozoan with many cilia, which are the small white hair-like projections.

The work done on the gas mixture is 297KJ.

W = -Pext(Vf-Vi)

P = 61.0 atm

Vi = 99.0 L

Vf = 51.0 L

put values in above expression

W = -Pext(Vf-Vi)

W = -61.0atm (51.0L - 99.0L)

W = 2928 atm.L

W = 2928 *101.33 J

W = 296694 J

W = 296.7 KJ

W = 297 KJ

In physics, work is the energy transferred to or from an item through the application of pressure alongside displacement. In its most effective form, for a consistent pressure aligned with the route of motion, it equals the manufactured from the force strength and the space traveled.

Work modifications the quantity of mechanical and internal energy possessed by gadgets. Whole work is achieved on a machine or item, energy is introduced to it.

The character of the work achieved can be categorized into three classes. they are +ve work, -ve work, and zero work. The character of work relies upon the perspective of pressure and displacement.

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The  Cm of the Microsand concentration in the tanks when expressed in grams of Microsand per liter (g/L) is known to be 3.8 g/L.

This is known to be a kind of  aggregate, that is said to be exempted from clay and shale and it is one that can rightly fine to pass via a No. 100 (that is 150 µm) sieve.

Note that from the question:

The Average of six samples = 30mg/L.

Then one need to Multiply:

30 by 300gpm x 1 Train x 1700 ( this is the use of the bulk density conversion factor).

Then one need to also Divide by (4000 gpm x 2000 mL) =  1.8 g/L.

Lastly you then multiply by 2,

1.8 g/L x 2  = 3.8 g/L.

Therefore, looking at the solution above, the Cm of the Microsand concentration in the tanks  is seen to be 3.8 g/L.

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False. Electric water heaters do not need to be vented to a flue so fumes can escape to the outside of the buildings since they do not produce fumes.

Electric water heaters produce heat and transfer it to water within an insulated tank. The heat source is an electric element that is submerged in the water.Electric water heaters are gaining popularity due to their energy efficiency and low maintenance requirements. Since they don't produce combustion gases, there is no need for a flue or chimney to be installed, which can save money and space. However, for safety reasons, it is recommended that electric water heaters be installed in an area with good ventilation to prevent any potential buildup of carbon monoxide or other hazardous gases from other appliances in the vicinity.

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Answer:

dont know

Explanation:

The enthalpy change of the reaction in terms of kJ/mol KOH is -11.902 kJ/mol  KOH.

To calculate the enthalpy change of the reaction in terms of kJ/mol KOH, we need to first determine the amount of KOH that reacted with the HCl. Using the given concentration and volume of HCl, we can calculate the number of moles of HCl:

1.5 mol/L * 0.100 L = 0.150 mol HCl

Since KOH and HCl react in a 1:1 molar ratio, the amount of KOH used in the reaction is also 0.150 mol.

Next, we need to calculate the heat released or absorbed by the reaction using the formula q = mCΔT, where q is the heat absorbed or released, m is the mass of the solution, C is the specific heat of the solution, and ΔT is the change in temperature.

The mass of the solution can be calculated using the density:

mass = volume * density = 100 mL * 1.00 g/mL = 100 g

Thus, q = 100 g * 4.185 J/g*K * (34.5°C - 30°C) = 1785.3 J

Finally, we can use the formula ΔH = -q/n, where n is the number of moles of KOH, to calculate the enthalpy change of the reaction:

ΔH = -1785.3 J / 0.150 mol = -11902 J/mol

Converting to kJ/mol:

ΔH = -11.902 kJ/mol

Therefore, the enthalpy change of the reaction in terms of kJ/mol KOH is -11.902 kJ/mol.

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In this question, we have a situation where a gas is in constant pressure but changing its volume and temperature, and the best way to solve a situation like this, is through the Charles's gas law formula, which shows the relationship between volume and temperature when the pressure is constant. The formula is:

V1/T1 = V2/T2

We have:

V1 = 0.510 L

T1 = 19°C, but we need it in Kelvin, 292 K

V2 = ?

T2 = 6°C, or 279 K

Now we add these values into the formula:

0.510/292 = V2/279

0.00175 = V2/279

V2 = 0.488 Liters is the new volume

The order of the  components involved in electron transport from those with the lowest redox potential to the highest Electron Transport Components are : NADH/NAD⁺ , NADH dehydrogenase complex ,  Cytochrome c reductase, cytochrome c oxidase, H₂O/O₂.

The  intermediate that is cytochromes and the other carriers having their intermediate of the redox potentials are arranged in the series which is the electron transport from the NADH  or the FADH to the O₂. The electron transport starts from the carriers that have the low redox potential to the one  having the high redox potential.

The electron transport of down the energy gradient through which the electron transport system that leads to the formation of the ATP from the ADP and the inorganic phosphate. This production of the  ATP is called as the oxidative phosphorylation.

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It important to make sure that the water line on the inside of the eudiometer matches that of the outside in order to obtain the actual pressure of the created gas.

Now, the issue is that water, regardless of temperature, has a specific vapour pressure. In other words, water will begin to evaporate whenever it is in contact with a gaseous phase up to a specific point where the partial pressure of the water vapour in the gas phase reaches a certain value. The pressure in the eudiometer will be lower than the atmospheric pressure when the water level in the eudiometer is lower than that in the cylinder. And so, in order to account for the difference between the two and also be able to obtain appropriate results, you must first determine the difference between the water levels or subtract them before converting them to millimeters of mercury (mmHg).

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Answer:

2. Distillation Flask

3. Fractionating column

4. Thermometer

5. Condenser

6. cold water in

7. cold water out

8. Recieving flask

13. Electric heater

Answer: most store-bought isnt

Explanation:

there typically a lot of addivitves

Answer:

Not quite, they are different catagories.

Explanation:

A molecule is two or more atoms connected to each other. An element is an atom with a name. Think of water, a single water molecule is called H2O because it has two hydrogen atoms and one oxygen atom. Hydrogen and oxygen are both elements. Another way to see it is like, there are many kinds of animals(atoms). A specific animal would be a cat or a bird or something(the elements).

TLDR: An element can be part of a molecule, but is not one on its own.

Each isotope of Oxygen has a different number of neutrons

The elements in nature have several types of isotopes

Atomic mass is the average atomic mass of all its isotopes

Isotopes are atoms has the same number of protons but has a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Some of the isotopes of oxygen are:

\(\tt _8^{16}O,_8^{17}O,_8^{18}O\)

Each isotope has 8 protons and 8 electrons but has a different number of neutrons

For O-16: number of neutrons = 16-8 = 8

For O-17: number of neutrons = 17-8 = 9

For O-18: number of neutrons = 18-8 = 10

According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds. 

Thus,  When speaking of polyatomic ions, the distinction between them and ions is frequently ignored in the fields of quantum physics, organic chemistry, and biochemistry.

A molecule can be heteronuclear, which is a chemical compound made up of more than one element, such as water (two hydrogen atoms and one oxygen atom; H2O), or homonuclear, which is a molecule made up of atoms of one chemical element, such as the two  molecule in the oxygen molecule (O2).

The term "molecule" is frequently used to refer to any gaseous particle, regardless of its composition, in the kinetic theory of gases.

Thus, According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds. 

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