a cylinder container is filled with air. its radius is 6cm and its height is 3.5cm. what is the volume of the air inside?

Taking into account the reaction stoichiometry, 1 mole of H₂ can be produced by reacting 2 moles of HCI.

In first place, the balanced reaction is:

Mg + 2 HCl  → MgCl₂ + H₂

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:

By reaction stoichiometry 2 moles of HCl form 1 mole of H₂.

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Answer:

amino acids

Hope this helps:)

Answer:

C: Amino Acids on edge

Explanation:

Approximately 60.9% of the total energy in 2005 came from fuels that emitted greenhouse gases. This signifies a significant contribution to global greenhouse gas emissions and highlights the importance of transitioning to cleaner and more sustainable energy sources to mitigate climate change impacts.

To determine the total percent of energy that came from fuels emitting greenhouse gases, we need to consider the energy sources listed in the chart that are known to produce greenhouse gas emissions. In this case, those would be oil, natural gas, and coal.

From the chart, we see that the percentages for these three energy sources are:

Oil: 37.9%

Natural gas: 23%

Coal: Not specified

Although the percentage for coal is not mentioned in the given information, it is a known fact that coal combustion releases greenhouse gases, including carbon dioxide (CO2). Therefore, we can assume that coal is among the fuels emitting greenhouse gases.

Adding up the percentages for oil and natural gas, we have:

37.9% (oil) + 23% (natural gas) = 60.9%

Therefore, approximately 60.9% of the total energy in 2005 came from fuels that emitted greenhouse gases. This signifies a significant contribution to global greenhouse gas emissions and highlights the importance of transitioning to cleaner and more sustainable energy sources to mitigate climate change impacts.

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Answer:

The answer to your question is A | Mn

Answer:

Simple sugars are a type of carbohydrate.

Explanation:

Carbohydrates are one of the three basic macronutrients — the other two being protein and fat. Simple sugars are found naturally in fruits and milk, or they can be produced commercially and added to foods to sweeten, prevent spoilage, or improve structure and texture.

The amount of oxygen needed in the reaction to burn the octane is higher than necessary. Octane is hence the reaction's limiting agent.

The limiting reactant, also known as the limiting reagent, is the reactant that is used up first during a chemical reaction, hence restricting the amount of product that can be produced during the course of the reaction.

A chemical reaction's limiting reagent is the one that will totally consume all of the reactants. The reaction can't continue once there is no more of a reactant. Hence, it prevents the reaction from intensifying and continuing further. If the other reactant hadn't been used up completely, the surplus reagent would have continued to react, and the reaction would also have continued.

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First, we need to determine the mass of water in the pool:

mass = density x volume

density of water = 1000 kg/m³

volume = length x width x depth

volume = 10.0 m x 4.0 m x 3.0 m = 120 m³

mass = 1000 kg/m³ x 120 m³ = 120000 kg

Next, we need to calculate the heat required to raise the temperature of the water:

q = m x c x ΔT

where q is the heat energy, m is the mass of water, c is the specific heat of water, and ΔT is the change in temperature.

c = 4.18 J/g°C (specific heat of water)

ΔT = 27.3°C - 20.2°C = 7.1°C

m = 120000 kg

q = 120000 kg x 4.18 J/g°C x 7.1°C = 35792400 J

Next, we need to convert the energy required to burn methane to heat energy:

-891 kJ/mol x (1 mol CH4/160 g CH4) x (1000 g/1 kg) = -5.569 kJ/g

We can now calculate the amount of methane needed:

energy = -5.569 kJ/g x mass CH4

mass CH4 = energy / (-5.569 kJ/g)

mass CH4 = 35792400 J / (-5569 J/g) = -6431.6 g

At STP, 1 mole of any gas occupies 22.4 L of volume. We can use this to convert the mass of methane to volume at STP:

1 mol CH4 = 16 g CH4

-6431.6 g CH4 x (1 mol CH4/16 g CH4) x (22.4 L/1 mol CH4) = -9074.4 L

Since we cannot have a negative volume, we can take the absolute value of the result:

|9074.4 L| = 9074 L

Therefore, approximately 9074 liters of methane gas at STP must be burned to raise the temperature of the water in the pool from 20.2°C to 27.3°C.

Answer:

A.DNA

Explanation:

Ahaa Its gona be right

Answer:

D.N.A.

Explanation:

Hi student! Let me help you out on this question.

D.N.A. is the molecule which carries instructions for inherited traits.

\(\therefore,Option\quad A \quad is \quad correct\)

Hope that this helped! have a good day ahead.

The ideal gas relationships among the variables are PV = nRT

An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.

Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.

An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect on the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable

relation

PV = nRT

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Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.

Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.

This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.

In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.

Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.

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The amount of heat energy needed to increase a substance's temperature by 1°C per unit mass is known as its specific heat capacity (or 1K). joule per kilogram per kelvin is the SI unit (Jkg-1K-1).

so,

805,560 Joules heat energy is needed to raise the temperature  from 23 °C to 191 °C.

Use the formula:

Q = cMΔT

where

Q = heat energy needed for that material to get desired temperature change (in Joules)

M = mass (in grams) so you have to convert from kilograms.

c = specific heat constant for the material being heated [in /(grams oC)]

ΔT = change in temperature (in oC)

Q = (1.75)(2.74 x 1000)(191 - 23) = (1.75)(2740)(168) = 805,560 Joules

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Q = cMΔT

where

Q is the amount of heat energy required to change the material's temperature.

You must convert from kilograms since M is mass (in grams).

c = the material's specific heat constant [in grams per degree Celsius]

T stands for temperature change (in oC)

Q is equal to (1.75 x 2.17 x 1000) (191 - 23) = (1.75 x 2170 x 168) = 637,980 Joules.

What does "specific heat capacity" mean?

In thermodynamics, a substance's specific heat capacity, commonly referred to as massic heat capacity, is calculated by dividing its heat capacity by its mass in a sample.

particular heat capacity's mathematical formula?

Delta T = Q=mc

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Answer:

i think the answer is 7

Explanation:

Hope this is it

The number of mole of H₂SO₄ present in the unknown solution is 0.006 mole

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ (nA) = 1

The mole ratio of the base, NaOH (nB) = 2

MaVa / MbVb = nA / nB

(Ma × 50) / (0.8 × 15) = 1 / 2

(Ma × 50) / 12  = 1 / 2

Cross multiply

Ma × 50 × 2 = 12

Ma × 100 = 12

Divide both side by 40

Ma = 12 / 100

Ma = 0.12 M

Mole = Molarity x Volume

Mole of H₂SO₄ = 0.12 × 0.05

Mole of H₂SO₄ = 0.006 mole

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Answer:

B is the answer

We are in a spiral galaxy but as of late scientists believe we are in a barred-spiral galaxy.

Explanation:

Hope this helped.

A brainliest is always appreciated.

Milky way is a type of  barred-spiral galaxy.

A galaxy is defined as a system of stars, stellar remainings, interstellar gas, dust, dark matter, which are bound together by means of gravity.The word is derived from the Greek word which literally means 'milky',as a reference to the Milky Way galaxy which contains the Solar System.

Most of the mass which is present in a galaxy is present in the form of dark matter, out of which only a few percent of the mass

is visible. Supermassive black holes are a common characteristic which are present at the centres of galaxies.

Galaxies are categorized as per their morphology in the shape of elliptical, spiral, or irregular. Many are believed to have supermassive black holes which are present at their centers. The Milky Way's central black hole which is present , also known as Sagittarius A*, has a mass which is four million times greater than the Sun.

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To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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The correct formula : BeSO₄

Chemical formula shows the composition number of the constituent atoms

Polyatomic ion consists of 2 or more ions

The equal charge of the two ions will cancel each other out, while the different charges of the two ions will be crossed each other

Be²⁺ (monatomic ion) has a positive charge of +2, while SO₄²⁻ (polyatomic ion) has a negative -2 charge, so that the two charges with the same magnitude but with different charges cancel each other out so that the compound form is BeSO4

The y axis is concentration since  the amounts of reactants and products remain constant after equilibrium is reached.

In a chemical reaction system, equilibrium is said to be attained when the rate of forward reaction and the rate of reverse reaction are equal. This is indicated by the straight line.

Therefore, the correct label for the y axis is concentration, because the amounts of reactants and products remain constant after equilibrium is reached.

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What best explains the label that the student should use on the y-axis?

D. Concentration as the concentrations of reactants and products remain constant after equilibrium is reached

First of all, let's calculate the polarity of every molecule.

To calculate the polarity we need to know the electronegativity of every element too.

To know the polarity, we proceed like this:

a) Ca2O3

The absolute value of the difference in electronegativity (ΔEN). If it is higher than 1.7 or equal to 1.7 we have an ionic compound.

ΔEN = EN (O) - EN (Ca) = 3.44 - 1 = 2.44 > 1.7 => Ionic

Ypu can find out electronativities from the periodic table

b) CaCl2

ΔEN = 3.16 (Cl) - 1 (Ca) = 2.16 (ionic)

c)RbBr

ΔEN = 2.96 (Br) - 0.82 (Rb) = 2.14 (ionic)

d)MgCl2

ΔEN = 3.16 (Cl) - 1.31 (Mg) = 1.85 (ionic)

e)K2S

ΔEN =2.58(S) - 0.82 (K) = 1.76 (ionic)

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The formula is incorrect for Ca2O3 because the oxidation state for Ca is +2, and the ionic compound is CaO, not Ca2O3

Answer: a) Ca2O3

Explanation:

thank you for your help by showing wavelength and the colour of frequency

Answer:

the anwers is xybac

Explanation:

Answer:

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Explanation:

Let's consider the unbalanced molecular equation when aluminum metal and oxygen gas combine to produce aluminum oxide. This is a combination reaction.

Al(s) + O₂(g) ⇒ Al₂O₃(s)

We can balance O  atoms by multiplying O₂ by 3 and Al₂O₃ by 2.

Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Finally, we multiply Al by 4 to get the balanced equation.

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

The best estimate of the heat of combustion, ΔHcomb, of the organic solid is determined as 17,640 J/g.

The heat of combustion of a substance, also known as the calorific value or the energy value, can be defined as the amount of heat liberated when a given amount of the substance undergoes combustion.

Apply the principle of conservation of energy to determine the heat of combustion of the organic solid.

Heat lost by the organic compound = Heat gained by the water

mΔH = McΔθ

where;

Substitute the given parameters and solve for the heat of combustion of the solid organic compound as shown below.

(1)(ΔH) = (2000)(4.2)(2.1)

ΔH = 17,640 J/g

Thus, the best estimate of the heat of combustion, ΔHcomb, of the organic solid is determined as 17,640 J/g.

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Answer:

Metal

Explanation:

Rubber and Wood are insulators. and Cotton is neither a insulator nor a conductor. But Metals are conductors

Question asked: Which of the following materials will conduct electricity well?

Answer: Metal

____________________________________________________

I hope this helps!

A solution is a mixture of the solute and the solvent. It may be pure and impure. There are 3 types of solutions depending on the solute:-

According to the data given in the question, the mass of the filter paper is increased after the filtration.

It states that the mixture passed from the filter paper had some solid substance that can not pass through the paper, due to which the weight is increased of the filter.

Hence, the correct option is 1. it is the mixture of the solid particle separated from the river.

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The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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Answer:

Phosphorus

Explanation:

Lewis Dot Structure is a structural representation of a molecule that shows valence electrons of a molecule.

The element in group 15, period 3 is Phosphorus (P). Phosphorus has an atomic number 15 and valence electrons are 5. So, the lewis structure will show 5 dots around P atom.

Producing energy and manfacturing of the following activities most Mass directly affect the water supply

An object's mass is determined by how much matter it has. Anything that has more substance will weigh heavier overall. For instance, because an elephant contains more stuff than a mouse does, it has a heavier mass. How much energy an object contains is not determined by its size.

The resistance of the body to acceleration (change in velocity) when ever a net force is employed can be measured experimentally as mass, which is equivalent to inertia. The gravitational pull of an object to other bodies is also dependent on its mass.

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The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

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The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

Answer:

+3

Explanation:

The phosphate ion has a charge of -3, so for the compound to have an overall change of 0, Fe needs to have a charge of +3.