Which two factors can affect a solid solute solubility
A. Whether the particles of the solute and solvent are changed
B. Pressure acting on the solute
C. Length of time spent stirring
D. Temperatures of the solvent and solute
The subject is science

Answer:

4

Explanation:

Answer to balance the equation

P4 + 6Cl2 => 4PCl3

Answer:

C

Explanation:

Answer:C.He should locate the chloroform stored in a dark container in chemical storage and should take it to the fume hood to pour.

Explanation:

The statement of the question clearly states that chloroform is sensitive to light and it's vapour is toxic.

If a substance is sensitive to light, then it must be stored in a dark bottle. This is because. If a substance that is sensitive to light is stored in a transparent container, it may be decomposed by light.

Being a substance whose fumes are toxic, Malik should pour the liquid in a fumes hood so that he does not inhale the fumes.

The direction of the impact is the direction of the ball R.

The direction of impact refers to the direction in which a force is applied to an object. It can be described as the line along which a force is transmitted into an object, and can be unidirectional or multidirectional.

The direction of impact is important in fields such as physics, engineering, and material science, as it affects how an object reacts to the applied force and the resulting damage or deformation. In this case, the direction of the impact is the direction that is moved by ball R.

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The volume of the balloon will be approximately 45 liters when the pressure decreases to 748 torr.

According to Boyle's Law, at constant temperature, the pressure and volume of a gas are inversely proportional. This means that as the pressure decreases, the volume increases, and vice versa.

The relationship between pressure and volume is given by the equation P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

In this case, the initial volume of the balloon is given as 44.5 L, and the initial pressure is 758 torr. The final pressure is given as 748 torr, and we need to find the final volume.

Using the formula P1V1 = P2V2, we can rearrange it to solve for V2:

V2 = (P1 * V1) / P2

Plugging in the values, we get:

V2 = (758 torr * 44.5 L) / 748 torr

Simplifying the equation, we find:

V2 = 45 L

Therefore, the volume of the balloon will be 45 liters when the pressure decreases to 748 torr under constant temperature.

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Answer: 1849.9584

Explanation:

The empirical formula is the simplest formula for a compound which is defined as the ratio of subscripts of smallest possible whole number of the elements present in the formula. It is also known as the simplest formula.

write a balanced equation for the reaction between tantalum pentachloride and water?

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Answer:

Answer is: elements in the same group have similar chemical properties. Periodic law is the arrangement of the elements in order of increasing atomic number.

Answer:

The main function of sensory transduction is the conversion of sensory signals to chemical signals in the nervous system. Sensory transduction occurs in the sensory receptors. In sensory transduction, the sensory neurons play an important role.

Explanation:

The number of moles of water produced can be calculated by first finding the number of moles of NO that are reacted.

Since 9.05 x 10^23 molecules of NO are present, the number of moles can be calculated as follows:

9.05 x 10^23 molecules NO * (1 mole NO / 6.02 x 10^23 molecules NO) = 1.50 moles NO

Next, we need to use the stoichiometry of the reaction to find the amount of water produced for the given number of moles of NO. From the equation, for every 6 moles of NO, 6 moles of water are produced. So, for 1.50 moles of NO, 1.50 moles NO / 6 NO/6 H2O = 0.25 moles of water are produced.

Answer:

it doesn't make sense bro. how are they gonna form before atoms if they are made out of atoms? everything is

Explanation:

Under the influence of gravity, atoms came together and resulted in a blast causing the "big bang". So the statement is false as stars and planets are formed due to the colliding of atoms.

About 13.7 billion years ago, the universe underwent a dramatic expansion that caused space to expand like a huge balloon.

That sums up the Big Bang idea, which is accepted by almost all cosmologists and theoretical physicists. The theory is backed up by a lot of strong data. For instance, we are aware that the universe is still expanding right now, and that this expansion is speeding up.

According to the conventional Big Bang theory, the beginning of the universe involved a singularity, a region of infinite temperature and density whose nature is difficult for humans to comprehend. However, scholars assert that this may not truly reflect reality because the singularity idea is based on Einstein's theory of general relativity.

The origin of the cosmos is still mostly unknown. A trillionth of a second after the Big Bang, according to scientists, is where the tale may be picked up.

Therefore, the statement is false.

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Scientists believe that dark matter is more prevalent in the universe than dark energy. Dark matter is estimated to make up approximately 27% of the universe, while dark energy is thought to account for around 68%. The remaining 5% of the universe is made up of visible matter such as stars and galaxies.

Dark matter is a form of matter that does not interact with light or any other electromagnetic radiation, making it invisible to telescopes. It is only detected through its gravitational effects on visible matter. Scientists hypothesize that dark matter plays a crucial role in holding galaxies together and in the large-scale structure of the universe.

On the other hand, dark energy is a mysterious force that is thought to be responsible for the accelerating expansion of the universe. Unlike dark matter, dark energy does not interact with matter at all, and its nature and origin remain largely unknown.

In summary, while both dark matter and dark energy are still not fully understood, scientists believe that dark matter is more prevalent in the universe than dark energy.

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Answer:

λ = 4.2x10^-13 m

Explanation:

c = λν

c is speed of light 3x10^8 m/s

λ is wavelength

ν is frequency

3.10^8 = λ . 7.13 × 10^20

λ = 4.2x10^-13 m

The molarity of the aluminum sulfate solution is 0.144 M, the concentration of the aluminum cation is 0.144 M, and the concentration of the sulfate anion is 0.144 M.

Mass of aluminum sulfate (Al2(SO4)3) = 12.3 g

Volume of solution = 250 mL = 0.25 L

The molar mass of aluminum sulfate (Al2(SO4)3) is 342.15 g/mol.

For the calculation of molarity, we can use the formula:

Molarity = Number of moles of solute / Volume of solution in liters

We can find the number of moles of aluminum sulfate using the formula:

Number of moles = Mass / Molar mass

Thus, the number of moles of aluminum sulfate (Al2(SO4)3) is:

Number of moles = Mass / Molar mass= 12.3 g / 342.15 g/mol= 0.036 moles

Now, we can calculate the molarity of the solution:

Molarity = Number of moles of solute / Volume of solution in liters= 0.036 moles / 0.25 L= 0.144 M

The concentration of the aluminum cation and sulfate anion in the solution will be the same as the concentration of aluminum sulfate (Al2(SO4)3). Thus, the concentration of aluminum cation and sulfate anion will also be 0.144 M. Therefore, the molarity of the solution is 0.144 M, the concentration of the aluminum cation is 0.144 M and the concentration of the sulfate anion is also 0.144 M.

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The order of the ions from highest to lowest average concentration in seawater is; Chloride, Sodium, Sulfate, Magnesium, Calcium, and Potassium.

The concentration of the ions in seawater is in the following order, from highest to lowest average concentration:

Chloride (Cl-) Sodium (Na+) Sulfate (SO4-) Magnesium (Mg2+) Calcium (Ca2+) Potassium (K+)

Seawater is the solution that is obtained by the dissolution of salts in the ocean. The salt in seawater is responsible for the electrical conductivity of seawater. In seawater, there are different types of ions, which includes;

Chloride (Cl-), Sodium (Na+), Sulfate (SO4-), Magnesium (Mg2+), Calcium (Ca2+), and Potassium (K+).

The highest to the lowest average concentration of the ions in seawater is Chloride (Cl-), Sodium (Na+), Sulfate (SO4-), Magnesium (Mg2+), Calcium (Ca2+) and Potassium (K+).

The average concentration of these ions ranges from milligrams per liter (mg/L) to grams per liter (g/L). Seawater is a complex solution and the concentration of each ion varies according to the geographical location and the local geology.

Therefore, the order of the ions from highest to lowest average concentration in seawater is; Chloride, Sodium, Sulfate, Magnesium, Calcium, and Potassium.

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Answer:

a.) exothermic

b.) 2,800.6 J

Explanation:

Answer: There are many possibilities for atomic orbits.

Explanation: In chemistry orbits, or orbitals, are the areas that electrons move around the nucleus of an atom. Think like the solar system.

There are three levels of orbitals (p,d, and f).

That should get you started. Use p, d and d described in your book to find out how many orbitals an atom has.

Answer:

Yes it is a chemical reaction

Explanation:

The spoiling of the food is a chemical reaction becouse once the food is spoilt it cannot become it's original form again

Answer: s sub level ↔ first energy level

s and p sub levels ↔ second energy level

s, p, and d sub levels ↔ third energy level

Explanation:

As we know, s sub level is nearest to the nucleus and lies in 1st principal shell, while if we see s and p sub levels are lies in 2nd subshell and s,p and d sub levels are lies in 3rd principal shell.

Answer:

Nothing. I guess ice vapor is a solid and water vapor is a liquid if nothing isn't an option, but that makes no sense.

Explanation:

Answer:

3.2 moles of H2SO4

Explanation:

We need to start with a balanced equation.  Lets assume the sulfuric acid is formed from sulfur dioxide and water.

   SO2 + H2O = H2SO4

This equation is balanced.  (Check it)

It tells us that 1 mole of SO2 will form 1 mole of H2SO4, if the reaction proceeds as planned.  That's a molar ratio of 1 to 1.  They are equal.  What moles we react, we should expect the same number of moles of product.  [And we need 1 mole of water at the same time]

So if we react 3.20 moles of sulfur dioxide, and keep out lab partner back, we'll obtain 3.2 moles of H2SO4.

The dissolution equation of the slightly soluble compound al(oh)3 if the solubility product expression is Ksp = [Al3+][OH–]3 will be:

Al(OH₃)\(_{(s)}\) ⇄ Al³⁺\(_{(aq)}\) + 3OH⁻\(_{(aq)}\)

A compound is created when two or more elements combine chemically in a specific mass ratio. Compounds are substances made up of two or more different types of elements in a specific proportion of their atoms. When the elements combine, some of their individual properties are lost and the newly formed compound has new properties.

Chemical formulas serve as a representation of compounds. A chemical formula is a symbolic representation of the atom compositions that make up a specific chemical compound. The chemical formula of water is H2O, which indicates that two hydrogen atoms and one oxygen atom have combined to form one molecule of H2O.

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Answer:

B) 88.6%

Explanation:

Percent yield equals actual yield divided by theoretical yield

actual yield is 31.0g

theoretical yield is 35g

percent yield was 88.57 which rounds up to 88.6%

Answer:

1. C(2)+H2(1) -> C2H6(1)

2. NH3(2)+O2(3)-> HCN(2)+H2O(3)

I am not sure about the second one.

Answer:

sweating

Explanation:

why do I need 20 words

Answer:

a. moles divide by volume

Explanation:

Molarity, denoted by symbol M, refers to the molar concentration of a solution. It is calculated using the formula as follows:

Molarity = number of moles of a solute ÷ volume of the solvent

Since, number of moles (n) has the unit: moles and volume (V) has the standard unit: Litres, then the unit for molarity is moles/litre or M.

Answer:

Twelve electrons are exchanged in the iron-oxygen redox reaction.

Explanation:

Oxidation and reduction reactions are complementary processes. Every oxidation must be accompanied by a reduction and vice versa. In fact, the both processes are not essentially different but are different aspects of the same process hence the coinage 'redox reaction'.

In the redox reaction under consideration, iron is the electron donor while oxygen is the electron acceptor. The half equations are shown below;

Oxidation half equation;

4Fe---> 4Fe^3+ + 12e

Reduction half equation;

3O2 + 12e ----> 6O^2-

Ionic equation of the process;

4Fe^3+ + 6O^2- -----> 2Fe2O3

Hence it can be clearly seen that twelve electrons were transferred in the process.

Answer:

6

Explanation:

Answer:

going without without masks is like to play with a dirty things which is very undesired and unwanted .corona virus is very serious world wide epidemic which is surrounded in all region due to our carelessness many lives are taken due to our carelessness. so please wear mask and maintain social distance to fight against all types of communicable diseases. I hope please be rational and aware.

Answer:

Hola porfa ayudame si podes

Answer:

B. 2 electrons are removed from the atom

Explanation:

The charge of an ion of calcium (Ca) is +2, which means that the calcium atom has lost 2 electrons.

Therefore, the correct answer is B. 2 electrons are removed from the atom.

The value of the final temperature is approximately 15.8 °C.

As we know the heat produced in the reaction is equal to the heat absorbed by the solution, the following expression can be written:

q = mc * ΔT

where q is the heat absorbed or evolved by the system, m is the mass of the solution, c is the specific heat capacity of the solution and ΔT is the change in temperature.

The quantity of heat absorbed by the system can be calculated as follows:

n(HNO₃) = 79/1000 × 0.211 = 0.01669 mol

n(Ca(OH)₂) = 38/1000 × 0.207 = 0.00787 mol

Both are 1:2 in molar ratio. Hence, n(HNO₃) is limiting.

Therefore, the amount of heat produced by the reaction,q = ΔH = -113 × 0.01669 = -1.88797 kJ

The mass of the solution can be calculated as follows:

mass = 79 + 38 = 117 g

The specific heat capacity of the solution is assumed to be that of water, i.e. 4.18 J/(g K).

Therefore, we haveq = mc * ΔT=> ΔT = q/mc= -1887.97/(117*4.18)= -4.217 ∘C

So, the final temperature is 20 - 4.217 = 15.783°C.

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The molar mass of CCl₄ is 154 g/mol

Molar mass is the mass in grams of one mole of a substance and is given by the unit g/mol.

It is calculated by taking the sum of atomic masses of all the elements present in the given formula.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Atomic mass of C = 12

Atomic mass of Cl = 35.5

Molar mass = 12 + (35.5 × 4)

= 154 g/mol

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