Which is the order of these solutions from strong acid to strong base?

Solutions:
household ammonia
battery acid
baking soda
stomach acid
antacid

A-stomach acid household ammonia battery acid antacid baking soda
B-battery acid stomach acid antacid baking soda household ammonia
C-battery acid stomach acid baking soda antacid household ammonia
D-stomach acid battery acid antacid baking soda household ammonia

Answer:

this is the reason why scientists opt to transmit data at lower frequency  instead of electromagnetic even it can carry more data at a higher frequencies is because using higher frequencies of electromagnetic spectrum travel shorter distances but have higher data carrying capacity.So this physical characteristic of electromagnetic waves limits the range and availability of frequencies for sending information.

Explanation:

Communication refers to the process of conducting and obtaining information in the form of signals. The electromagnetic waves are used by the high technology communications systems, and there are different kinds of electromagnetic waves, which are utilized like microwaves, infrared, radio waves, and others.  

However, there are some of the limitations with the applications of electromagnetic waves:  

1. Due to a confined number of broadcast frequencies, the application of transmitters must be restricted in a certain manner or they will lead to interference.  

2. The physical features like buildings and mountains can interfere or prevent certain transmissions.  

3. In the air, the signals can be misleaded due to atmospheric conditions and the signals from the space are at certain occasions get distorted by solar activity.  

Answer:

Goal succession refers to the situation where the new or modified goals are incorporated or substituted for the existing one in such a manner that they do not change the spirit of the existing goals. The new goals are such that individuals or the organisation are willing to state publicly.

Answer:

but I have a great day to be a good day for a new post it on your own life to be the

Answer:

No simple relationship exists between population size and environmental change. However, as global population continues to grow, limits on such global resources as arable land, potable water, forests, and fisheries have come into sharper focus.

Explanation:

Answer:

c

Explanation:

Answer:

???

Explanation:

Answer:

increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object would make the oppositely charged objects attract each other more.

The magnetic quantum number (ml) represents the orientation of the orbital in three-dimensional space the only possible value of the magnetic quantum number ml for a 1s electron is 0.

Quantum is the smallest possible unit of a physical quantity, such as energy or momentum. It is a fundamental concept in quantum mechanics, which is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic level.

The idea of quantization was first proposed by Max Planck in 1900, when he discovered that energy is emitted and absorbed in discrete units called "quanta" when studying the behavior of light and blackbody radiation. Later, this idea was extended to other physical quantities, such as the momentum and position of particles.

According to quantum mechanics, the behavior of particles and systems cannot be fully described using classical mechanics, which assumes that particles have definite positions and velocities at all times. Instead, the behavior of particles and systems is described using wave functions, which represent the probability of finding a particle at a given position and time.

The principles of quantum mechanics have important applications in many areas of physics, including atomic and molecular physics, condensed matter physics, and particle physics. They are also the basis.

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Answer    1 mole = 6.02 × 1023 atoms

0.25 moles × (6.02 × 1023) = 1.5 × 1023 atoms Carbon

for the first one

The volume of a 60% solution by mass that is prepared with 45 grams of a particular solute is 75 mL.

Firstly, to calculate the volume of the solution, we need to know the density of the solution. Since it is not mentioned in the question, we can assume it to be 1 g/ml.

Next, we can use the formula:

mass of solute = (mass of solution) x (percent by mass)

Here, the mass of solution is the mass of solute plus the mass of solvent.

Or, the mass of solute + the mass of solvent = the mass of solution

Therefore,

The mass of solvent = the mass of solution - the mass of solute

Substituting the values provided in the question, we get:

mass of solvent = (45) / (0.6) - 45 (since the solution is 60%)

mass of solvent = 75 - 45 = 30 g

Thus, mass of the solvent = 30g

Since volume = mass / density

The volume of the 60% solution = mass of solution / density

volume of solution = (45 + 30) / (1)

volume of solution = 75 mL

Thus, 75 mL of the 60% solution by mass is made with 45g of solute.

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When copper is placed in water, it reacts with the water molecules to form copper(II) ions and hydrogen gas. The reaction is exothermic, which means it releases heat energy into the surroundings. By measuring the temperature changes that occur, we can determine the amount of heat that is released by the reaction.

The temperature changes can be measured using a thermometer. We can place the copper metal in a container of water and take the initial temperature reading. Then, we can add the copper to the water and record the temperature change over time. By monitoring the temperature changes, we can observe the exothermic reaction taking place.

The heat released by the reaction between copper and water has many practical applications, including in the design of power plants and in the production of steam for heating and electricity generation. Therefore, understanding the heat released during this reaction is important for a variety of scientific and engineering fields.

In conclusion, step 7 of putting copper metal in water and measuring the temperature changes allows us to observe and measure the heat released by the exothermic reaction between copper and water, which has important applications in various scientific and engineering fields.

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Answer:

Aluminum

copper

Iron

Lead

The Final Slide:

Aluminum- 0.90

Copper- 0.35

Iron- 0.44

Lead- 0.12

Explanation:

I hope this helps! :))))

Answer:

A solvent is a substance that dissolves a solute, resulting in a solution. A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid.

Explanation:

Answer: Neils Bohr

Explanation: Development of the Atomic Theory. In 1913, Neils Bohr, a student of Rutherford 's, developed a new model of the atom. He proposed that electrons are arranged in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.

Radical bromination of (S)-3-methylhexane results in 3-bromo-3-methylhexane as the main byproduct, which is optically inactive. The branching hydrocarbon 3-methylhexane has two enantiomers. It belongs to the family of heptane isomers.

One of heptane's two structural isomers, 2,3-dimethylpentane, and this particular molecule both possess the chirality property. They are (R)-3 methylhexane and (S)-3 methylhexane, respectively. Bromomethane is the natural product. This is a substitution process because one of the hydrogen atoms in the methane has been swapped out for a bromine atom. Enantiomers are stereoisomers that cannot be superimposed mirror images of one another. Depending on how each stereocenter is set up, enantiomers are different. In terms of handedness, they can be compared to gloves for the right or left hand.

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Answer:

the ability to be dissolved, especially in water.

Explanation:

If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.

If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.

The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.

To ensure spontaneity at all temperatures, two conditions must be met:

ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.

ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.

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Answer:

C₄H₃N

Explanation:

To solve this question we must find the moles of each atom in order to find the empirical formula (Simplest ratio of atoms present in a molecule). With empirical formula and the molar mass of the compound we can find the molecular formula as follows:

Moles H:

91.5mg H * (1mmol / 1mg) =

91.5mmol H

Moles N:

424mg N * (1mmol / 14mg) =

30.286mmol N

The ratio of moles regard to moles N (The lower number of moles is:

H = 91.5mmolH / 30.286mmolN = 3.0

N = 30.286mmolN / 30.286mmolN = 1

empirical formula = CₓH₃N

The molar mass of this formula is:

12*x + 1*3 + 1*14 = 17g/mol

Solving for X:

12X + 17g/mol = 65g/mol

12X = 48g/mol

X = 4

There are 4 atoms of carbon and molecular formula is:

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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Answer:

same ammount of electrons

Explanation:

hope this helps:)

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer:

The answer is "Option B".

Explanation:

\(\to CH_3COOH + NaOH \longleftrightarrow CH_3COONa + H_2O\\\\\to CH_3COONa + NaOH\longleftrightarrow CH3COONa\\\\\therefore \ mol\ NaOH = (5 \ E-3\ L)\times(0.10 \ \frac{mol}{L}) = 5 \ E-4\ mol\\\\\)

\(\to mol\ CH_3COOH = (0.05 \ L)\times(0.20 \frac{mol}{L}) = 0.01 \ mol\\\\\to C \ CH_3COOH = \frac{(0.01 \ mol - 5 \ E-4\ mol) }{(0.105 \ L)}\\\\\to C \ CH_3COOH = 0.0905 \ M\\\\\therefore \ mol \ CH_3COONa = (0.05\ L )\times (0.20 \ \frac{mol}{L}) = 0.01 \ mol\\\\\)

\(\to C \ CH_3COONa = \frac{(0.01\ mol + 5 \ E-4\ mol)}{(0.105\ L )}\\\\\to C \ CH_3COONa = 0.1 \ M\\\\\therefore Ka = ([H_3O^{+}]\times \frac{(0.1 + [H_3O^+]))}{(0.0905 - [H_3O^+])} = 1.75\ E-5\\\\\to 0.1[H_3O^+] + [H_3O^+]^2 = (1.75 E-5)\times (0.0905 - [H_3O^+])\\\\\)

\(\to [H_3O^+]^2 \ 0.1[H_3O^+] = 1.584\ E-6 - 1.75\ E-5[H_3O^+]\\\\\to [H_3O^+]^2 + 0.1000175[H_3O^+] - 1.584 \ E-6 = 0\\\\\to [H_3O^+] = 1.5835\ E-5 \ M\\\\\therefore pH = - \log [H_3O^+]\\\\\to pH = - \log (1.5835 \ E-5)\\\\ \to pH = 4.8004 > 4.7\)

The gas that has a volume of 752 mL at 1.98 atm and 62°C is most likely NO₂ (option D).

The volume of a sample of gas can be calculated using the following formula:

PV = nRT

Where;

According to this question, the volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The number of moles is as follows:

1.98 × 0.752 = n × 0.0821 × 335

1.489 = 27.5n

n = 0.054mol

molar mass of the gas = 2.49g ÷ 0.054mol = 45.99g/mol

The gaseous substance with the molar mass of 45.99g/mol is NO₂.

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Explanation:

ur answer okkkkkkkkkkkkkkkkll

Answer:

Mass of mercury produced = 2.00 g

Explanation:

At room temperature and pressure, the temperature T = 25° C or 298.15 K while the pressure = 1 atmosphere or 760 mmHg.

Mass of oxide of mercury decomposed at room temperature and pressure = 2.16 g

Volume of oxygen produced = 120 cm³ or 0.12 dm³

One mole of any gas has a volume of 24 dm³ at room temperature and pressure.

Therefore, number of moles of oxygen produced = 0.12 dm³ / 24 dm³/mol = 0.005 moles

Mass of oxygen produced = number of moles × molar mass

Molar mass of oxygen = 32 g/mol

Mass of oxygen produced = 0.005 moles × 32 g/mol = 0.16 g

Thus, mass of mercury produced = mass of mercury oxide decomposed - mass of oxygen produced

Mass of mercury produced = 2.16 g - 0.16 g

Mass of mercury produced = 2.00 g

There are approximately 3.47 x 10²² molecules in 5.657g H₂SO₄.

To calculate the number of molecules in 5.657g H₂SO₄, we need to use the Avogadro's number and the molar mass of H₂SO₄.

The molar mass of H₂SO₄ is 98.079 g/mol.

We need to calculate the number of moles of H₂SO₄:

Number of moles = mass/molar mass

                             = 5.657g / 98.079 g/mol

                            = 0.05767 mol.

Then, we can use Avogadro's number, which is 6.022 x 10²³ molecules/mol, to find the number of molecules:

Number of molecules = number of moles x Avogadro's number

                                   = 0.05767 mol x 6.022 x 10²³ molecules/mol

                                    = 3.47 x 10²² molecules

To calculate the number of molecules in a given sample of a substance, you need to use the Avogadro's number, which is 6.022 x 10²³ molecules/mol. This means that one mole of a substance contains 6.022 x 10²³ molecules.

We are given the mass of H₂SO₄, which is 5.657 g. To calculate the number of molecules, we first need to determine the number of moles of H₂SO₄ in the given sample. The molar mass of H₂SO₄ is 98.08 g/mol. So, the number of moles of H₂SO₄ can be calculated as follows:

moles = mass / molar mass

moles = 5.657 g / 98.08 g/mol

moles = 0.0576 mol

Now, we can use the Avogadro's number to determine the number of molecules of H₂SO₄ in 0.0576 moles:

number of molecules = moles x Avogadro's number

number of molecules = 0.0576 mol x 6.022 x 10²³ molecules/mol

number of molecules = 3.47 x 10²² molecules

As a result, in 5.657 g of the material, there are roughly 3.47 x 1022 molecules of H₂SO₄.

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The concept VSEPR theory is mainly based on the arrangement of electron groups. This theory is generally used to predict the geometry of the molecules.

The Valence shell electron pair repulsion theory is based on the assumption that valence shell electron pairs repel each other and are oriented in space as far apart as possible to minimize mutual repulsion.

Each group around the central atom is designated as a bonding pair or non-bonding pair. For example BeF₂ is a two electron group in which the number of bond pairs on the central 'Be' atom is two.

Similarly the molecule BCl₃ is a three electron group, the number of electron pairs on the 'Be' atom is 3.

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Weakness and nausea are the responses of vomiting and fever. Because people tend to feel weak and uneasy after vomiting.

A response is a response to a stimuli, such as a question, an experience, or another kind of stimulus. You are experiencing an emotional reaction to the drama being played out on screen if you cry during sad movies. A response can take many different forms, such as an explanation for a question, an emotional response, or a rejoinder.

The act of vomiting is the forceful ejection through the mouth of the contents of the upper digestive tract and stomach. It can also be referred to as throwing up or feeling ill.

Vomiting is a reflex that aids the body in getting rid of potentially dangerous chemicals. The majority of people will eventually vomit.

This information relates to vomiting in adults and kids older than 12. For details pertaining to children between the ages of 0 and 12 years, see vomiting in children.

Therefore, Weakness and nausea are the responses of vomiting and fever.

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The amount of \(HNO_3\) that can be made from 25.0 g of \(NO_2\) according to the reaction would be 22.68 grams.

From the balanced equation of the reaction:

\(3 NO_2 + H_2O -- > 2 HNO_3 + NO\)

The mole ratio of \(NO_2\) and  \(HNO_3\) is 3:2. In other words, for every 3 moles of \(NO_2\) that react, 2 moles of \(HNO_3\) are produced.

If mole = mass/molar mass

25.0 g of \(NO_2\) will be equivalent to (the molar mass of \(NO_2\) is 46 g/mol):

                   25/46 = 0.54 moles

From, the mole ratio of 3:2, 0.54 moles of \(NO_2\) will require:

    2/3 x 0.54 = 0.36 moles of  \(HNO_3\)

The molar mass of  \(HNO_3\) is 63.01 g/mol.

Mass of 0.36 moles of  \(HNO_3\) = 0.36 x 63.01

                                                  = 22.68 g

Thus, the mass of \(HNO_3\) that can be made from the reaction is 22.68 grams.

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