What is the molecular formula of hydrogen peroxide ?

Answer:

The Resource and Location. ...

Infrastructure. ...

Renewable Does Not Mean Unlimited.

Explanation:

These challenges include a restricted resource, limited suitable geographical areas, transmission losses, and the possibility of depleting steam resources from underground wells.

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The two current engineering challenges using EGS are location and depletion of renewable energy sources.

Geothermal sources contain heat  but do not have natural water resource.Sufficient reservoir volume and permeablity capacity is created by stimulating the rock. Because of which, large volume of water is heated by keeping it with contact of rock.

EGS  systems can be developed anywhere in the world since earth contains heat at depths.It aims at increasing effectiveness  and reducing the upfront risk. PDC  bit designs increase the rate of penetration in the rocks.

Challenges faced by EGS  are insufficient reservoir volume  and rate of penetration and even long term reliability and even long gestation periods.

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Answer:

put only the light items on it

Explanation:

The cell notation for the given chemical reaction is: Zn(s) | Zn2+(aq) || Cd2+(aq) | Cd(s)

In cell notation, the left-hand side represents the anode compartment, where oxidation takes place, and the right-hand side represents the cathode compartment, where reduction occurs. The vertical line represents the salt bridge or porous membrane that allows ion flow between the two compartments.
In the given reaction, zinc metal is oxidized to Zn2+ ions, which occurs at the anode. Meanwhile, Cd2+ ions are reduced to cadmium metal, which occurs at the cathode.
It's important to note that the anode is always written on the left-hand side of the cell notation, and the cathode is written on the right-hand side. Additionally, the reactants are written before the products, and the oxidation half-reaction is written before the reduction half-reaction.
Overall, the cell notation provides a shorthand way of representing electrochemical reactions and their respective half-reactions.

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Answer:

Explanation:

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Explanation:

RFM=98g

1mol=6.022x10^23molecules

1mol=RFM

98g H2SO4=6.022x10^23molecules

24.0g H2SO4=?

24×6.022×10^23/98

=1.475×10^23 molecules

1) crust 2)mantle 3) asthenosphere 4)core 5) hydrosphere are the correct matches for the given options.

A atomic number 26 & chemical symbol Fe are given to the element iron. It is a metal that belongs to the first transition series and the eight group of a periodic table. It is the most common element on the planet by mass, just above of oxygen, and makes up a significant amount of both the outer and inner core of the planet.

Iron is found in substantial amounts in hemoglobin, a type of protein found in red blood cells that delivers oxygen from lungs to each and every part of the body. If the body doesn't have enough iron, it won't produce enough red blood cells to deliver oxygen, which leads to fatigue.

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Answer: endothermic

Explanation: A chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings.

In this particular question, the change in state that does not have an increase in entropy is A) gasoline freezing.

Entropy is a concept in thermodynamics that represents the measure of disorder or randomness in a system. In other words, it is the degree of uncertainty or unpredictability associated with a given system.

When a substance freezes, it goes from a liquid state to a solid state. During this process, the molecules in the substance slow down and become more ordered. This means that the entropy of the system decreases rather than increases, as it would during other changes of state like boiling or melting.

Therefore, the answer to this question is A) gasoline freezing.

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Answer:

0.072 moles, 16.776g.

Explanation:

The reaction of Na2SO4 and BaCl2 occurs as follows:

Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq)

To solve this question we must find the moles of each reactant. As the reaction is 1:1, the reactant with the low number of moles is limiting reactant. The moles of limiting reactant = Moles BaSO4. The mass can be obtained with the molar mass of BaSO4 -233.38g/mol-

Moles Na2SO4:

500cm³ = 0.500L * (0.250mol / L) = 0.125 moles

Moles BaCl2 -Molar mass: 208.23g/mol-

15.00g * (1mol / 208.23g) = 0.072 moles

The moles of BaSO4 are 0.072 moles and its mass is:

0.072 moles * (233.38g / mol) = 16.8g ≈ 16.776g

Answer:

4092 atoms of iron i am guessing

Explanation:

Answer: 56.077 g/mol

Explanation:

Molar mass Calcium: 40.078

+

Molar mass Oxygen: 16.999

_____________

Molar mass Calcium Oxide 56.077

Answer:

Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. ... And all of them form an anion with a single negative charge. The VIA elements gain two electrons to form anions with a 2- charge.

Explanation: OR

Metallic atoms hold some of their electrons relatively loosely. Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain electrons to form anions.

Metallic atoms hold some of their electrons relatively loosely. Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain › cat...

_

Answer:

It gains one or more electrons from another atom to become negatively charged.

Explanation:

An atom becomes charged by either gaining or losing electrons, and is called an ion. An atom with less than the normal number of electrons is a positive ion (a cation), and an atom with one or more extra electrons is a negative ion (an anion).

The reason why the litmus paper can be used is because the reaction of bromotriphenylmethane and ethanol produces HCl.

We define the litmus paper as any piece of paper that have been coated with an organic material such that the dye can interact with an acid or a base and lead to a change in the color of the dye and the paper respectively.

Thus, the color of litmus paper would differ in an acidic and a basic solution as it were. When there is a chemical reaction between bromotriphenylmethane and ethanol we also obtain hydrochloric acid as one of the products and it is able to have some kind of interaction with the litmus paper making it to have a color change.

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The mass of nitrogen dissolved in the 92.0 L home aquarium at room temperature is 778.48 grams.

The mass of gases refers to the amount of matter or substance present in a gaseous state. It represents the total mass of all the gas particles within a given volume.

In the study of gases, the mass of gases is often expressed in terms of molar mass, which is the mass of one mole of the gas. Molar mass is typically measured in grams per mole (g/mol).

The mass of gases can be calculated using the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas. The ideal gas law equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

n = X × P × V / (R × T)

Given :

P = 1.0 atm

V = 92.0 L

X = 0.78 (mole fraction of nitrogen)

T = 25 + 273.15 = 298.15 K.

n = 0.78 × 1.0 atm × 92.0 L / (0.0821 L.atm/mol.K × 298.15 K)

n = 27.86 moles

Mass of nitrogen = n × molar mass

Mass of nitrogen = 27.86 moles × 28.0 g/mol

Mass of nitrogen = 778.48 g

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The amount of energy that is required each year for the purpose of agriculture is only about 10%.

Energy is a very important part of civilization. In the current time, energy is necessary for all kinds of productions and agriculture is not an exception.

As such, the amount of energy that is required each year for the purpose of agriculture is only about 10%.

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The volume of steam that could be produced at STP if 12.8 g of oxygen reacts with excess hydrogen is 17.92 L

We'll begin by obtaining the mole of steam produced. This can be obtained as follow:

2H₂ + O₂ -> 2H₂O

From the balanced equation above,

1 mole O₂ reacted to produce 2 moles of steam, H₂O

Therefore,

0.4 mole O₂ will react to produce = 0.4 × 2 = 0.8 mole of steam, H₂O

Finally, we shall determin the volume as follow:

At standard temperature and pressure (STP),

1 mole of H₂O = 22.4 L

Therefore,

0.8 moles of H₂O = (0.8 mole × 22.4 L) / 1 mole

0.8 moles of H₂O = 17.92 L

Thus, we can conclude that the volume produced is 17.92 L

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(a) To write a chemical formula for the C, H, N, O portion of the waste, we need to determine the empirical formula based on the percentages given.

Let's assume we have 100 grams of waste, which means we have 72 grams of moisture and 28 grams of the remaining portion.

In the remaining portion:

Carbon (C) is 45% of 28 grams = 12.6 grams

Hydrogen (H) is 6.4% of 28 grams = 1.792 grams

Oxygen (O) is 28.8% of 28 grams = 8.064 grams

Nitrogen (N) is 3.3% of 28 grams = 0.924 grams

Now we need to convert these grams into moles by dividing each element's mass by its molar mass:

Carbon: 12.6 g / 12.01 g/mol = 1.049 moles

Hydrogen: 1.792 g / 1.008 g/mol = 1.778 moles

Oxygen: 8.064 g / 16.00 g/mol = 0.504 moles

Nitrogen: 0.924 g / 14.01 g/mol = 0.066 moles

To find the empirical formula, we divide each mole value by the smallest mole value, which is 0.066 moles:

Carbon: 1.049 moles / 0.066 moles = 15.89 ≈ 16

Hydrogen: 1.778 moles / 0.066 moles = 26.97 ≈ 27

Oxygen: 0.504 moles / 0.066 moles = 7.64 ≈ 8

Nitrogen: 0.066 moles / 0.066 moles = 1

Therefore, the empirical formula for the C, H, N, O portion of the waste is C₁₆H₂₇O₈N.

(b) The balanced chemical reaction for the production of methane (CH₄) can be represented as follows:

C₁₆H₂₇O₈N → xCH₄ + yCO₂ + zH₂O + wN₂ + other products

Since the given waste contains carbon (C), hydrogen (H), and nitrogen (N), and we want to produce methane, the balanced reaction for methane production from the waste can be simplified to:

C₁₆H₂₇O₈N → 16CH₄ + other products

(c) To determine the fraction of the volume of gas produced that is methane, we need to consider the stoichiometry of the reaction. From the balanced reaction above, we see that 16 moles of methane (CH₄) are produced from 1 mole of the waste.

The fraction of the volume of gas produced that is methane would be the ratio of the volume of methane to the total volume of gases produced. Since methane is a gas, we can assume the volume ratio is the same as the mole ratio.

Therefore, the fraction of the volume of gas produced that is methane is 16/17, or approximately 0.941.

(d) At STP (standard temperature and pressure), one mole of gas occupies 22.4 * 10⁽⁻³⁾m³.

From part (c), we know that 16 moles of methane (CH₄) are produced from 1 mole of waste.

The volume of methane produced per kilogram of food waste would be:

16 moles * 22.4 * 10⁽⁻³⁾ m³/ mole = 0.3584 m³/kg

So, approximately 0.3584 cubic meters of methane gas would be produced per kilogram of food waste.

(e) To find the Higher Heating Value (HHV) of methane in kilojoules per kilogram of food waste, we need to know the HHV value of methane itself. The HHV of methane is approximately 55.5 megajoules per cubic meter (MJ/m³).

Using the volume of methane produced per kilogram of food waste (0.3584 m³/kg) and the HHV of methane (55.5 MJ/m³), we can calculate the HHV of methane per kilogram of food waste as follows:

HHV of methane per kilogram of food waste = Volume of methane per kilogram of food waste * HHV of methane

= 0.3584 m³/kg * 55.5 MJ/m³

= 19.856 MJ/kg

Converting megajoules (MJ) to kilojoules (kJ), we have:

HHV of methane per kilogram of food waste = 19.856 MJ/kg * 1000 kJ/MJ

= 19856 kJ/kg

Therefore, the Higher Heating Value (HHV) of methane in kilojoules per kilogram of food waste is approximately 19856 kJ/kg.

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The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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A. The change in dimensions of the cylindrical shell can be calculated using the formula for longitudinal strain and Poisson's ratio. The maximum intensity of shear stress induced can be determined using the formula for the hoop stress in a cylindrical shell.

To calculate the change in dimensions of the cylindrical shell, we can use the formula for longitudinal strain:

ε = ΔL / L

where ε is the longitudinal strain, ΔL is the change in length, and L is the original length of the shell. Given that the shell is 3 m long and subjected to an internal pressure of 150 N/cm^2, we can calculate the change in length as follows:

ΔL = (P * L) / (E * t)

where P is the internal pressure, E is the Young's modulus, and t is the thickness of the shell. Substituting the values, we have:

ΔL = (150 N/cm^2 * 300 cm) / (200 GPa * 10 mm)

Next, we can calculate the maximum intensity of shear stress induced using the formula for hoop stress:

σ_hoop = (P * r) / (2t)

where σ_hoop is the hoop stress, P is the internal pressure, r is the radius of the shell (which is half the diameter), and t is the thickness of the shell. Substituting the values, we have:

σ_hoop = (150 N/cm^2 * 50 cm) / (2 * 10 mm)

By calculating these expressions, we can determine the change in dimensions of the shell and the maximum intensity of shear stress induced.

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Answer:

B. with more motion of particles within a substance.

Answer:

B. with more motion of particles within a substance.

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The pre-laboratory write-up for this experiment in the laboratory notebook should include a comprehensive list of physical and chemical properties of the liquids and solids used, along with the associated safety or health hazards.

In the pre-laboratory write-up, it is important to provide detailed information about the physical and chemical properties of the substances involved in the experiment. This includes characteristics such as color, odor, boiling point, melting point, density, solubility, and reactivity. By listing these properties, the experimenter gains a better understanding of the substances they will be working with.

Additionally, it is crucial to include the safety or health hazards associated with each liquid and solid. This information ensures that the experimenter is aware of the potential risks involved and can take appropriate safety precautions. Safety hazards may include flammability, corrosiveness, toxicity, reactivity with other substances, and environmental hazards. Health hazards may include irritations, sensitizations, carcinogenicity, reproductive toxicity, and respiratory hazards.

By including this information in the pre-laboratory write-up, the experimenter can make informed decisions about handling, storage, and disposal of the substances. It also promotes a safer working environment and reduces the risk of accidents or adverse health effects.

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Answer:

it should be  0-0

Explanation:

Fossil fuels are formed over millions of years from the remains of dead plants and animals that have been buried under layers of rock and sediment.

These fuels contain stored carbon that was originally absorbed by the plants and animals during their lifetime. Examples of fossil fuels include coal, oil, and natural gas. When these fuels are burned for energy, the carbon is released into the atmosphere in the form of carbon dioxide, which contributes to climate change. Natural gas is a combustible mixture of hydrocarbons and other organic compounds that is found beneath the Earth's surface. Coal is a non-renewable fossil fuel that is used to generate electricity and heat, and is also used in the production of steel, cement, and other industrial products.

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Adding or removing thermal energy can cause a substance to change from one state to another, and chemical reactions can cause thermal energy to increase or decrease.

Thermal energy is internal energy that exists in a system due to its temperature.

Thermal energy is energy related to the random motion of atoms and molecules, named thermal because this energy can be measured through temperature (thermal).

The atoms will collide randomly and the temperature will increase. This is the benchmark for thermal energy. The volume and pressure on the atoms also have an effect because volume and pressure are directly proportional to temperature in accordance with the formula for the ideal gas equation PV = nRT.

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Answer:

480.06 g/mol, Thorium nitrate.

Explanation: