a solution of strontium hydroxide with a ph of 11.4 to be prepared. what mass of strontium hydroxide is requred to make 1.00l of this solution

The intermolecular interactions between water molecules are greater than those between ammonia molecules.

In a certain state of matter, substances are bound together by intermolecular forces. Three different states of matter exist;

Solid, sLiquid, sGas .

The level of intermolecular contact between molecules is greatest when matter is solid. Liquid states have weaker intermolecular interactions, while gaseous states have the weakest intermolecular contacts.

Since ammonia is a gas at room temperature, its molecules interact with one another less strongly than those of water at the same temperature.

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Answer: false

Explanation: I'm the brainliest

Answer:

A.outer-shell electrons of one atom are transferred to the inner electron shells of another atom.

Explanation:

In covalent chemical bond, outer shell share pair of electrons to fill both atoms outer shell. Covalent bond can be polar and non-polar. Hydrogen and carbon bonding is example of non-polar bonds; while hydrogen bonding with chlorine is polar covalent bond example

A condensed structural formula is a type of chemical structure representation that shows the connectivity of atoms in a molecule and the arrangement of functional groups.

In a condensed structural formula, the atoms are listed in the order in which they are bonded, and each atom is represented by its elemental symbol. The bonds between atoms are shown by either a line or a pair of lines, representing single or double bonds, respectively. Functional groups, such as hydroxyl (-OH) or carbonyl (C=O) groups, are also shown as part of the condensed formula. For example, the condensed structural formula for ethanol (CH3CH2OH) can be represented as follows:

CH3CH2OH

In this representation, the carbon atoms are shown in a chain, with the hydrogen atoms attached to them, and the hydroxyl group (-OH) is attached to one of the carbon atoms. Condensed structural formulas are commonly used in organic chemistry to represent the structures of complex molecules, and they provide a more compact representation of the molecule compared to other types of structural formulas, such as Lewis structures or line-angle structures.

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Statement disproved by Dalton's atomic theory is atoms are indivisible and indestructible.In Rutherford’s gold foil experiment the atom has a small but very dense nucleus containing protons and neutrons.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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a) The structure of linoleate (18:2cd9,12) at pH 7 is: H3C-CH2-CH=CH-CH2-CH=CH-(CH2)7-COO-. b) Linoleate is the anion form of linoleic acid, which is the uncharged free acid form.

A) Here is the structure of linoleate (18:2cd9,12) at pH 7:

      H H H H H H H H H H H H H H H H H H

      | | | | | | | | | | | | | | | | | |

   H3C-CH2-CH=CH-CH2-CH=CH-(CH2)7-COO-

Note that the double bonds are at the 9th and 12th carbon positions (cd9,12).

b) The difference between linoleic acid and linoleate lies in their chemical forms.

Linoleic acid is the uncharged, free acid form (carboxylic acid) of the molecule, whereas linoleate refers to the anion (salt) form of linoleic acid when it loses a hydrogen ion and forms a carboxylate ion (-COO-).

Linoleate is commonly found in biological systems as the result of linoleic acid reacting with a base or being incorporated into lipids.

In terms of structure and composition, they both refer to the same essential fatty acid with 18 carbon atoms and two double bonds, but they differ in their charged or uncharged state.

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Claim: The ability of a crane to pick up and release pieces of metal is due to the principles of electromagnetism.

Evidence:

Reasoning:

Therefore, the principles of electromagnetism are responsible for the crane's ability to pick up and release pieces of metal.

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ATP (adenosine triphosphate) is like a compressed spring in that it stores energy that can be released when needed by the cell.

ATP is often called the "energy currency" of the cell because it carries the energy that fuels most cellular processes.

ATP consists of a nitrogenous base (adenine), a sugar molecule (ribose), and three phosphate groups.

The phosphate groups are negatively charged and repel each other, creating a high-energy bond that can be broken to release energy.

This is similar to a compressed spring, which stores energy by being compressed and can release energy when the compression is released.

When a cell needs energy to carry out a process, it can break the high-energy bond between the second and third phosphate groups of ATP, releasing energy and forming ADP (adenosine diphosphate) and inorganic phosphate. This process is called hydrolysis and releases energy that can be used by the cell.

Therefore, just like a compressed spring, ATP stores energy that can be released and used when needed by the cell.

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The mass of carbon that resulted from the decomposition of 37 L of carbon dioxide is 19.8 g

CO₂ —> C + O₂

From the balanced equation above,

1 L of CO₂ decomposed to produce 1 L of C.

Therefore,

37 L of CO₂ will also decompose to produce 37 L of C

At standard temperature and pressure (STP),

22.4 L = 1 mole of C

Therefore,

37 L = 37 / 22.4

37 L = 1.65 mole of C

Thus, the mass of Carbon can be obtained as follow:

Mass = mole × molar mass

Mass of C = 1.65 × 12

Mass of C = 19.8 g

Thus, 19.8 g of carbon were obtained from the reaction.

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Answer:

1.505746561978472

Explanation:

The solubility of oxygen in the blood of a person who is placed in a hyperbaric chamber increases.

This is because the pressure inside the hyperbaric chamber is increased, which results in an increased partial pressure of oxygen. The solubility of a gas in a liquid is directly proportional to the partial pressure of that gas, so as the pressure of oxygen increases, the solubility of oxygen in the blood increases.

As a result, more oxygen can dissolve in the blood, providing more oxygen to the tissues and organs of the body. This increased oxygen supply can help to improve oxygenation in tissues that may be deprived of oxygen, such as in cases of decompression sickness, carbon monoxide poisoning, and some wounds.

It is important to note that while the increased solubility of oxygen in the blood can provide benefits in certain cases, it can also lead to toxicity if the pressure is increased too much. Therefore, it is important to carefully monitor the pressure inside the hyperbaric chamber and adjust it as necessary to avoid any harmful effects.

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Answer:

Speed=Distance

Time

Explanation:

Based on the provided data, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

The balanced chemical equation for the reaction between ammonia and hydrochloric acid is:

NH3(aq) + HCl(aq) → NH4Cl(aq)

From the equation, we see that one mole of ammonia reacts with one mole of hydrochloric acid to produce one mole of ammonium chloride.

To determine the concentration of ammonia in the cloudy ammonia solution, we need to find out how many moles of hydrochloric acid were used to react with the ammonia.

The number of moles of HCl used is:

moles of HCl = concentration of HCl × volume of HCl used

moles of HCl = 0.100 mol/L × 0.0500 L

moles of HCl = 0.00500 mol

Since the reaction is 1:1 between HCl and NH3, the number of moles of NH3 in the cloudy ammonia solution is also 0.00500 mol.

The volume of the cloudy ammonia solution used is 25.00 mL, which is equivalent to 0.02500 L.

The concentration of ammonia in the cloudy ammonia solution is:

concentration of NH3 = moles of NH3 / volume of cloudy ammonia solution

concentration of NH3 = 0.00500 mol / 0.02500 L

concentration of NH3 = 0.200 mol/L or 0.200 M

Therefore, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

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A double replacement reaction, sometimes referred to as a metathesis reaction, two compounds exchange their cations or anions to create two new molecules.

A double replacement reaction's general form is:

AD = CB + CD + AB

where A, B, C, and D are ions or molecules, respectively.

The reaction of sodium chloride (NaCl) and silver nitrate (AgNO3) to produce silver chloride (AgCl) and sodium nitrate (NaNO3) is an illustration of a double replacement reaction.

AgCl + NaNO3 = AgNO3 + NaCl

In this reaction, the sodium ion (Na+) in sodium chloride is replaced by the silver ion (Ag+) in silver nitrate to generate silver chloride, and the chloride ion (Cl-) in sodium chloride is replaced by the nitrate ion (NO3-) in silver nitrate to form sodium chloride. nitrate.

This kind of reaction can take place in both the solid and aqueous phases. Double replacement reactions are frequently utilised in industrial operations, including the creation of medicines, fertilizer, and water filtration.

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The heat transfer during the combustion of n-octane gas with 58% excess air is -50.16 kJ/kg fuel. Note that the negative sign indicates that heat is being released during the combustion process.

To calculate the heat transfer during the combustion of n-octane gas, we can use the following steps:

Step 1: Write the balanced chemical equation for the combustion of n-octane:

C8H18 + 12.5(O2 + 3.76N2) → 8CO2 + 9H2O + 47(N2)

Step 2: Calculate the mass flow rate of the fuel:

Assuming a steady-state process, the mass flow rate of the fuel can be calculated as:

\(m_{fuel} = m_{air} / (1 + excess \ air)\)

where \(m_{air\)  is the mass flow rate of air and excess air is the excess air percentage/100. Since the fuel and air enter the burner at standard conditions, we can assume that the mass flow rate of air is 1 kg/s (1 kg of air per second).

\(m_{fuel} = 1 / (1 + 0.58) = 0.631 kg/s\)

Step 3: Calculate the heat released during combustion:

The heat released during combustion can be calculated from the enthalpy change of the reaction. We can use the standard enthalpies of formation to calculate the enthalpy change for each component in the reaction and then use these values to calculate the enthalpy change of the overall reaction. The enthalpy change of the reaction can be expressed as:

ΔH = ΣnΔHf(products) - ΣnΔHf(reactants)

where n is the stoichiometric coefficient and ΔHf is the standard enthalpy of formation.

The standard enthalpies of formation for the reactants and products can be found in a table of thermodynamic properties. Using these values, we get:

ΔH = \((8 * (-393.5 kJ/mol) + 9 * (-241.8 kJ/mol)) - (1 * (-2501 kJ/mol) + 12.5 * 0 + 47 * 0)\)

ΔH = \(-5466.8 kJ/kmol\)

The mass flow rate of the fuel is 0.631 kg/s, so the heat transfer during combustion can be calculated as:

Q = ΔH x \(m_{fuel}\) / \(M_{fuel}\)

where  \(M_{fuel}\) is the molar mass of n-octane, which is 114.23 g/mol.

\(Q = -5466.8 kJ/kmol \ *\ 0.631 kg/s / (114.23 g/mol \ * \ 1000 g/kg)\\\\Q = -50.16 kJ/kg fuel\)

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Chemical weathering different from physical weathering because chemical weathering results in the breakdown of rock, while physical weathering does not

Chemical weathering involve the interaction of rock with minerals solution to change the composition of rock in this process water interact with minerals to create various chemical reaction and transform the rock and physical weathering is the process that cause disintegration of rock, minerals soil without chemical change that's why chemical weathering different from physical weathering because chemical weathering results in the breakdown of rock, while physical weathering does not

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The noble gas with a molar mass of 80.0 g/mol is Krypton (Kr).

To find the molar mass of the noble gas, follow these steps:

1. Convert the given pressure to atmospheres: 758 mm Hg × (1 atm / 760 mm Hg) = 0.998 atm.
2. Convert the given temperature to Kelvin: 23.0 °C + 273.15 = 296.15 K.
3. Use the ideal gas law equation, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant (0.08206 L atm / mol K), and T is the temperature.
4. Rearrange the equation to solve for n: n = PV / RT.
5. Plug in the given values: n = (0.998 atm × 40.75 L) / (0.08206 L atm / mol K × 296.15 K) = 1.7515 mol.
6. Calculate the molar mass by dividing the mass of the gas by the number of moles: Molar mass = 140.1 g / 1.7515 mol = 80.0 g/mol (rounded to 3 significant figures).

The noble gas with a molar mass of 80.0 g/mol is Krypton (Kr).

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Answer:

The elements are listed by atomic number (the number of protons in the nucleus), and elements with similar chemical properties are grouped together in columns.

Answer

1.0 mol

Explanation

Given:

Volume, V = 5.0 L

Temperature, T = 215 K

Pressure, P = 342 kPa

The gas constant, R = 8.31 L kPa/mol K

What to find:

The number of moles of the gas sample.

Step-step-solution:

The number of moles of the gas can be determine using the ideal gas equation formula:

Put the given values into the formula and calculate for n:

The number of moles of the gas sample is 1.0 mol.

Answer:

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.

Answer:D Tilt of earths axis

Explanation:The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the "ecliptic plane"

Heat is required to increase the temperature of 10.0 grams of water is 250 J.

To calculate the heat required to increase the temperature of a substance, we can use the formula:

Q = m x c x ΔT

where:

Q is the heat energy

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

In this case, we have:

m = 10.0 grams (mass of water)

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

ΔT = 6.0°C (change in temperature)

Substituting these values into the formula, we get:

Q = 10.0 g x 4.18 J/g°C x 6.0°C

Q = 250.8 J

Therefore, the heat required to increase the temperature of 10.0 grams of water by 6.0°C is approximately 250.8 J.

The closest answer choice is (a) 250 J.

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Water molecules are the species that also are created on this end of the cell. The total reaction is referred to as a redox reaction.

The research of the correlation of electrical electricity and chemical reactions is the focus of the branch of chemistry known as electrochemistry. Oxidation process are those in which electric currents are either generated or received.

The typical 1.5-volt cell, which powers numerous electrical devices like TV remote controls and clocks, is an illustration of an electrochemical cell. Copper ions or pv cells are those that may produce an electric current as a consequence of chemical reactions taking place inside of them.

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d) 0.

5 out of 8 would be paired already because it has 5 electrons, then the other 3 would be filled by the 3 hydrogens.

Answer:

See explanation

Explanation:

Number of moles = given mass/molar mass

For Ca(OH)2

n= 31.82g/74g/mol= 0.43 moles

n = mass/ molar mass

Molar mass of K2SO3 = 158g/mol

mass= 3.2 × 158 = 505.6 g

1 formula unit = 6.02 × 10^23

1 mole = 6.02 × 10^23

x moles = 7.25x10^23

x = 7.25x10^23/6.02 × 10^23

x= 1.2 moles

1 mole of Cl2 occupies 22.4 L at STP

x moles of Cl2 occupies 46.6L

x = 46.6/22.4

x= 2.1 moles

The number of avocados in an average selection of 12 crates is 500 avocadoes.

The total number of avocadoes in the truck is determined from the correct insurance value f the avocadoes.

The total number of avocadoes in the truck is calculated as follows:

Weight of one avocado = 0.4 pound

Value of avocado per pound = $0.30

Value of one avocado = $0.30 * 0.4

Value of one avocado = $0.12

Value of one crate of avocado = $2000/400

Value of one crate of avocado = $5

Number of avocadoes per crate = 5/0.12 41 avocadoes

Number of avocados in an average selection of 12 crates =  5/0.12 * 12

Number of avocados in an average selection of 12 crates = 500 avocadoes

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Answer:

false \

explaintion

then wound pond and lakes be salt water

The salt in the ocean mainly comes from runoff from the land and openings in the seafloor. So, I would say false.

Answer: The concentration of hydrogen ion is 2.5 x 10∧-3.

Explanation:

It is well known that; pH + pOH = 14

∴ pH + 11.40 = 14

  pH = 14 -11.40 = 2.60

Remember that,

pH = - Log [ H+ ]

2.60 = - log [H+]

To get the  hydrogen ion concentration, we take the anti-log of 2.60.

[H+] = Antilog 2.60 = 2.5 x 10∧-3.

a) The total pressure in the vessel will increase as equilibrium is approached. b) the system reaches equilibrium is calculated to be 0.339 atm. and c) the final partial pressure of \(CH_3OH\)(g) is expected to be very close to zero.

A vessel is a large ship or boat designed to transport people or goods across bodies of water. Vessels are used for a variety of purposes, ranging from fishing and recreational cruising to large-scale cargo and passenger transportation.

This is because the reaction stoichiometry shows that two molecules of HCl(g) are consumed for each molecule of \(CH_3OH\)(g) consumed, resulting in the formation of one \(H_2O\)(g) molecule and one \(CH_3Cl\)(g) molecule. Since the moles of gas participating in the reaction decreases, the total pressure in the vessel increases.

b) Using the value of Kp, the final partial pressure of HCI(g) after the system reaches equilibrium is calculated to be 0.339 atm.

c) I disagree with the student's claim that the final partial pressure of \(CH_3OH\)(g) at equilibrium is very small but not exactly zero. This is because the reaction stoichiometry and the equilibrium constant Kp both indicate that the reaction is highly favored towards producing \(CH_3Cl\)(g). Therefore, the final partial pressure of \(CH_3OH\)(g) is expected to be very close to zero.

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To find the mass percent composition of an element, divide the mass contribution of the element by the total mass then multiply by 100.

The total mass = 200.0 g

Phosphorus mass = 87.28 g

Oxygen mass = 112.72 g

%composition of P:

=> (87.28 g/200.0g)*100

=> 43.64 %

%composition of O:

=> (112.72g/200.0 g)*100

=> 56.36 %