Help me please I really need this tomorrow

Taking into account the reaction stoichiometry, the volume of O₂ is 7.28406 L when 28.5 g of hydrogen peroxide decomposes to form water and oxygen at 150 degrees c and 2.0 atm.

The balanced reaction is:

2 H₂O₂  → 2 H₂O + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 68 grams of H₂O₂ form 1 mole of O₂, 28.5 grams of H₂O₂ form how many moles of O₂?

moles of O₂= (28.5 grams of H₂O₂×1 mole of O₂)÷68 grams of H₂O₂

moles of O₂= 0.42 grams

Then, 0.42 moles of O₂ are formed.

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the definition of the ideal gas law:

2 atm×V = 0.42 moles×0.082 (atmL)÷(molK)× 423 K

Solving:

V = (0.42 moles×0.082 (atmL)÷(molK)× 423 K)÷ 2 atm

V= 7.28406 L

Finally, the volume of O₂ is 7.28406 L.

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Answer: Anaphylaxis

Explanation:

I have a nut allergy, and this has happened to me once. The doctors also told me a lot about anaphylaxis, and I like to learn about myself.

I hope this helps!! :)

Some of the properties are:

1. Gamma, γ-rays are not deflected by electric and magnetic fields. It shows that they do not have any charge.

2. Gamma, γ-rays are electromagnetic waves like X-rays. The wavelength of γ-ray photon is smaller than that of X-rays.

3. The rest mass of a Gamma, γ-ray photon is zero. (Photon has mass zero but it has momentum, why?)

4. Gamma, γ-rays travel with the speed of light.

5. Gamma, γ-rays have very large penetrating power. They can pass through several centimeter of iron and lead.

6. Gamma, γ-rays can produce fluorescene in a substance like willimite.

Answer: Argon-52

Explanation: Its B

The sulfur hexafluoride molecule consists of one sulfur atom and six fluorine atoms. The atomic masses of sulfur and fluorine are 32.0 u and 19.0 u, respectively. One mole of this very heavy gas has a mass of 146.0 grams.

To find the mass of one mole of sulfur hexafluoride (SF6) molecule, we need to calculate the molecular mass of the compound using the atomic masses of sulfur and fluorine.

The sulfur hexafluoride molecule consists of one sulfur atom and six fluorine atoms. The atomic masses of sulfur and fluorine are 32.0 u and 19.0 u, respectively.

Step 1: Calculate the mass of the sulfur atom.
Mass of sulfur = 1 x atomic mass of sulfur = 1 x 32.0 u = 32.0 u

Step 2: Calculate the mass of the six fluorine atoms.
Mass of fluorine = 6 x atomic mass of fluorine = 6 x 19.0 u = 114.0 u

Step 3: Calculate the molecular mass of sulfur hexafluoride.
Molecular mass of SF6 = mass of sulfur + mass of fluorine = 32.0 u + 114.0 u = 146.0 u

Step 4: Convert the molecular mass to molar mass.
One mole of sulfur hexafluoride has a mass of 146.0 grams.

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EDTA (ethylenediaminetetraacetic acid) is commonly used to determine the hardness of water due to its ability to form complexes with metal ions, particularly calcium and magnesium ions.

Water hardness refers to the concentration of calcium and magnesium ions present in water. These ions can cause scaling, reduce the effectiveness of soaps, and have other negative effects. EDTA acts as a chelating agent, meaning it can bind to metal ions and form stable complexes.

In the process of determining water hardness, a known amount of EDTA solution is added to a water sample. The EDTA molecules form complexes with the calcium and magnesium ions present in the water.

The endpoint of the titration is reached when all the metal ions are complexed by the EDTA, resulting in a color change or an indicator reaching a specific endpoint.

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It would take a banana slug approximately 1,029,863 minutes to run a complete marathon, which is equivalent to about 17,164 hours or approximately 714 days.

To determine the length of time it would take for a banana slug to run a complete marathon of 26.2 miles, use the given information and conversion factors:

Given:

Slug Travel Rate: 0.0229 mm/s

Conversion Factors:

1 mile = 5280 feet

1 foot = 12 inches

1 inch = 2.54 cm

1 cm = 10 mm

1 second = 1 s

Now set up the conversions to cancel out the units and find the time:

26.2 miles × (5280 feet/1 mile) × (12 inches/1 foot) × (2.54 cm/1 inch) × (10 mm/1 cm) × (1 s/0.0229 mm) = X seconds

Calculating this value:

X = (26.2 × 5280 × 12 × 2.54 × 10) / (0.0229)

X ≈ 61,791,789.68 seconds

Now convert seconds to a time unit that has a value between 1 and 100. Let's choose minutes:

61,791,789.68 seconds × (1 min / 60 seconds) = Y minutes

Y ≈ 1,029,863.16 minutes

So, it would take a banana slug approximately 1,029,863 minutes to run a complete marathon, which is equivalent to about 1,029,863/60 ≈ 17,164 hours or approximately 714 days.

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Magnesium and fluorine atoms will most likely form an ionic bond.

Ionic bonds are formed between elements with a large difference in electronegativity, which is the measure of an atom's ability to attract electrons towards itself. Magnesium and fluorine have a difference in electronegativity of 2.13, which is large enough to form an ionic bond.

In ionic bonds, one atom loses electrons and becomes a positively charged ion (cation), while the other atom gains electrons and becomes a negatively charged ion (anion). In this case, magnesium will lose two electrons to become Mg2+ and fluorine will gain one electron to become F-. These two ions will then attract each other electrostatically to form magnesium fluoride (MgF2), which is an ionic compound.

On the other hand, covalent bonds are formed between elements with a small difference in electronegativity, where atoms share electrons to achieve a stable electron configuration. Magnesium and fluorine have a large electronegativity difference, so they are unlikely to share electrons and form a covalent bond. Therefore, magnesium and fluorine will most likely form an ionic bond.

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Answer: Mg is a cation and Cl is an anion

Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1

Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.

Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

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The leaves of plants primarily serve to photosynthesize and require water conducted by the root to do so.

As a leaf of a plant running low on supplies that the root is responsible for, what I will be needing is water.

Thus, I will have to send a text message to the root to supply me with water. The root will respond by asking its foot soldiers (the root hairs) to conduct water into the root.

Once water gets into the root, it enters special cells that are responsible for conducting water inside plants - the xylems. The root sends the water through the xylem and water travels from there to me - the leaf.

Once the water gets to me, I will use it in combination with inorganic carbon (carbon dioxide) to synthesize carbohydrates.

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Potassium acetate (KC₂H₃O₂) is the solubility curve represented by the letter C.

option B is the correct answer.

Solubility is the amount of solute that dissolves in a solvent. The solubility of most solutes increases with an increase in the temperature of the solvent.

From the given graph we can conclude that the solubility of the curve labelled C given corresponds to the solubility of potassium compound and we can conclude that the compound is

Thus, potassium acetate (KC₂H₃O₂) is the solubility curve represented by the letter C.

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Answer:

1. Number 3

2. Number 1

3. Number 5

4. Number 4

5. Number 2

I think, this is the order.

Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.

Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

The time can be represented as follows:

t= 2.303\∧ log A0/A

∧= 0.693/t 1/2

The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.

The given parameters are as follows:

t1/2=12.3

A0=5.5

A=0.688

t= 2.303/(0.693/12.3) log (5.5/0.688)

t=36.9

t=37 years

Thus, wine was produced 37 years ago (1984 as usual year 15,2021)

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Explanation:

a process for separating minerals from gangue by taking advantage of the differences in their hydrophobicity.

I believe that is accurate

hope this helped have a nice day

and mark me brainiest :)

Copper is mostly utilized in generators, house and auto wiring, as well as the cables in gadgets like radios, TVs, computers, lighting, and motors due to its flexibility and good conductivity.

The expenses of legacy health care and company pensions were also fixed. Therefore, many costs remained largely same as revenues declined. This resulted in losses. Due to the mounting losses and the weakening economy, GM was no longer able to operate as a profitable company.

Who is the GM Company's owner? Stockholders, 12.56% General Motors Co. insiders, plus 7.47% retail investors collectively own 79.97% of General Motors Co. (NYSE: GM). The largest individual Ford Motor Co. fund is Retired person Medical Benefits Trust UAW.

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The correct answer is e. All of the above statements are true.

When two aqueous solutions are mixed in a coffee cup calorimeter, the resulting reaction causes the temperature of the solution to rise above room temperature.

This indicates that energy is being released from the system, making the reaction exothermic. The change in enthalpy, ΔH, can be calculated using the calorimeter by measuring the temperature change and the heat capacity of the calorimeter. Finally, since energy is leaving the system during the reaction, the products have a lower potential energy than the reactants. Therefore, all of the statements in the question are true.

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The amount of the compound \(XY_2\) that can be generated would be 11.28 grams

From the equation of the reaction, the mole ratio of X and Y is 1:1.

Mole of 3.5 grams of X = 3.4/24 = 0.1417 moles

Mole of 4.2 grams of Y = 4.2/35 = 0.12 moles

Thus, Y is the limiting reactant because it is present in a lower amount than needed.

Mole ratio of Y and  \(XY_2\) = 1:1

Equivalent mole of  \(XY_2\) = 0.12 moles

Molar mass of  \(XY_2\) = 24 + (35x2) = 94 g/mol

Mass of 0.12 moles of  \(XY_2\) = 0.12 x 94 = 11.28 grams

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Answer: for an example

volume can easily be calculated: pi*(d^2/4)*length -> pi*[(7x10^-2)/4]*70x10–2 = volume of iron rod {VOIR}

Density = mass / volume

Therefore

Mass = density x volume

However, weight is equals to ‘mass x g (free fall acceleration’

So mass is in kg but weight is a force so simple force equation to where ‘a (acceleration)’ in ‘F=ma’ is ‘g’.

Hence,

Weight = 9.81 ms^-2 (is ‘g’) x 7870 kgm^-3 x VOIR m^3 is *insert calculated answer* N.

Explanation:

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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Answer:

Part A

pH ≈ 2.273

Part B

ΔpH ≈ -4.726

Part C

pH ≈ 1.973

Part D

ΔpH ≈ -0.301

Explanation:

Part A

The pH of a solution is given by the negative concentration of hydrogen ions in the solution

2.0 mL = 0.002 L

The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;

1 Liter of 4.0 M HCl contains 4.0 moles of HCl

2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl

The concentration of 0.008 moles in 1.50 L is given as follows;

Concentration = The number of moles/(The volume in liters)

∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)

∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl

Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;

The number of moles of [H⁺] in the solution = 0.00533 moles

The pH of the solution = -log[H⁺]

∴ pH = -log[5.33 × 10⁻³] ≈ 2.273

The pH of the 1.5 L of pure water will be approximately 2.273

Part B

The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273

The change in pH is ΔpH = 2.274 - 7 = -4.726

ΔpH ≈ -4.726

Part C

When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;

C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²

The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter

The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973

Part D

The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.

The Bronsted-Lowry acid, base and the conjugate acid, and the conjugate base in each of the following reactions are mentioned below serially:

Bronsted-Lowry acid                                  Bronsted-Lowry base

HNO₃                                                           H₂O

H₂O                                                              NH₃

H₂SO₄                                                          OH⁻

H₂O                                                              C₂H₃O₂⁻

H₂PO₄⁻                                                         OH⁻

H₃O⁺                                                             H₂PO₄⁻

HCO₃⁻                                                           H₂O

H₂O                                                               HCO₃⁻

Conjugate acid:                                           Conjugate base:

H₃O⁺                                                             NO₃⁻

NH₄⁺                                                             OH⁻

H₂O                                                              HSO₄⁻

HC₂H₃O₂⁻                                                    OH⁻

H₂O                                                              HPO₄²⁻

H₃PO₄                                                          H₂O

H₃O⁺                                                            CO₃²⁻

H₂CO₃                                                          OH⁻

Bronsted-Lowry acids are substances that donate protons or H+ ions to other compounds to form conjugate bases. Bronsted-Lowry bases are substances that accept protons or H+ ions from other compounds to form conjugate acids.

For the given reactions:

a. HNO₃ + H₂O <---> H₃O⁺ + NO₃⁻

Bronsted-Lowry acid: HNO₃

Bronsted-Lowry base: H₂O

Conjugate acid: H₃O⁺

Conjugate base: NO₃⁻

b. NH₃ + H₂O <---> NH₄⁺ + OH⁻

Bronsted-Lowry acid: H₂O

Bronsted-Lowry base: NH₃

Conjugate acid: NH₄⁺

Conjugate base: OH⁻

c. H₂SO₄ + OH⁻ <---> HSO₄⁻ + H₂O

Bronsted-Lowry acid: H₂SO₄

Bronsted-Lowry base: OH⁻

Conjugate acid: H₂O

Conjugate base: HSO₄⁻

d. C₂H₃O₂⁻ + H₂O <---> OH⁻ + HC₂H₃O₂

Bronsted-Lowry acid: H₂O

Bronsted-Lowry base: C₂H₃O₂⁻

Conjugate acid: HC₂H₃O₂⁻

Conjugate base: OH⁻

e. H₂PO₄⁻ + OH⁻ <---> HPO₄²⁻ + H₂O

Bronsted-Lowry acid: H₂PO₄⁻

Bronsted-Lowry base: OH⁻

Conjugate acid: H₂O

Conjugate base: HPO₄²⁻

f. H₂PO₄⁻ + H₃O⁺ <---> H₃PO₄ + H₂O

Bronsted-Lowry acid: H₃O⁺

Bronsted-Lowry base: H₂PO₄⁻

Conjugate acid: H₃PO₄

Conjugate base: H₂O

g. HCO₃⁻ + H₂O <---> H₃O⁺ + CO₃²⁻

Bronsted-Lowry acid: HCO₃⁻

Bronsted-Lowry base: H₂O

Conjugate acid: H₃O⁺

Conjugate base: CO₃²⁻

h. HCO₃⁻ + H₂O <---> H₂CO₃ + OH⁻

Bronsted-Lowry acid: H₂O

Bronsted-Lowry base: HCO₃⁻

Conjugate acid: H₂CO₃

Conjugate base: OH⁻

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Answer:

4.  0.5 kilometers (1st option)

5.  0.1 00 liters (last option)

Explanation:

500 meters to kilometers

4.

1 kilometer = 1000 meters

We use the formula SBD (SMALL TO BIG DIVIDE) i hope this helps you

500 ÷ 1000

= 0.5 kilometers

5.

100 milliliter to liter

SBD

100 ÷ 1000

= 0.1 00 liters

Answer:

C: The Cheetah running at a constant speed.

Explanation:

Acceleration can be defined as:

1: A decrease in speed

2: An increase in speed

3: A change in direction.

The cheetah is the only object that does not meet any criteria for acceleration.

The example that is not an example of acceleration is a cheetah running at a constant speed on a hunt. The correct option is option (c).

Acceleration refers to a change in velocity, either in magnitude or direction. In the case of the cheetah running at a constant speed, there is no change in velocity, so there is no acceleration.

The cheetah maintains a steady speed,  there is no change in velocity hence, it is not accelerating.

Therefore, a cheetah runs at a constant speed on a hunt. The correct option is option (c).

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Answer:

Since the foil has a mass of 830 g, you can use the density to find its volume 830g ⋅ 1 cm3 2.70g = 307.4 cm3 You now know that the volume of the foil is

Explanation:

The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: ρ=m/V where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically called specific weight.

A characteristic of aromatic hydrocarbons is : ( A ) They have single and double bonds

Aromatic hydrocarbons are a class of unsaturated hydrocarbons which are based of 6 carbon ring moiety. They are gotten during the extraction of fossil fuels and can be used as solvents for the production of industrial products as well as consumer products. They contain single and double bonds of carbon atoms.

Hence we can conclude that They have single and double bonds

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Answer:Therefore, you would need to add approximately 21.18 mL of the 20% sugar liquid to the 120 mL bottle of liquid to make the final mixture 3% sugar.

Explanation:

To determine how much of the 20% sugar liquid you would need to add to a 120 mL bottle of liquid to make it 3% sugar, we can set up an equation based on the amount of sugar in the initial and final mixtures.

Let's denote:

x = the volume of the 20% sugar liquid to be added (in mL)

In the initial mixture, the sugar content is 20% of x mL, which is equal to 0.2x mL of sugar.

In the final mixture, the total volume is 120 mL + x mL, and the sugar content is 3% of the total volume, which is 0.03 times the total volume in mL.

We can now set up the equation:

0.2x = 0.03(120 + x)

Simplifying the equation:

0.2x = 3.6 + 0.03x

0.2x - 0.03x = 3.6

0.17x = 3.6

Dividing both sides by 0.17:

x = 3.6 / 0.17

x ≈ 21.18 mL

You would need to add approximately 21.18 mL of the 20% sugar liquid to the 120 mL bottle of liquid to make the final mixture 3% sugar.

To determine how much of the 20% sugar liquid you would need to add to a 120 mL bottle of liquid to make it 3% sugar, we can set up an equation based on the amount of sugar in the initial and final mixtures.

Let's denote:

x = the volume of the 20% sugar liquid to be added (in mL)

In the initial mixture, the sugar content is 20% of x mL, which is equal to 0.2x mL of sugar.

In the final mixture, the total volume is 120 mL + x mL, and the sugar content is 3% of the total volume, which is 0.03 times the total volume in mL.

We can now set up the equation:

0.2x = 0.03(120 + x)

Simplifying the equation:

0.2x = 3.6 + 0.03x

0.2x - 0.03x = 3.6

0.17x = 3.6

Dividing both sides by 0.17:

x = 3.6 / 0.17

x ≈ 21.18 mL

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Given that the empty flask weighs 390.0 g and we want to add 2.2 g of sugar.

We want to calculate the weight we would expect to see on the balance when we're done adding the sugar. It is known that the empty flask weighs 390.0 g, and the weight of sugar to be added is 2.2 g.

The total weight of the flask and sugar would be 390.0 + 2.2 = 392.2 g. Hence, we would expect to see 392.2 g on the balance when we're done adding the sugar.

The weight of the flask can be determined by weighing the empty flask before the addition of the sugar. The sugar is then added, and the flask is weighed again to get the total weight of the flask and sugar. The difference between the total weight and the weight of the empty flask is the weight of the sugar added.

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