7.50 mol of CH4 contains how many particles

Ionic Equation: H2[CoCl4] + 4 NH4SCN → H2[Co(SCN)4] + 4 NH4Cl

Net Ionic Equation: CoCl4^2- + 4 NH4SCN → Co(SCN)4^2- + 4 NH4Cl

By dissolving all soluble ionic chemicals (those denoted with a (aq)) into their corresponding ions, the ionic equation can be written. To demonstrate that an ion is present in solution, it should be displayed with its charge and a (aq). To display the quantity of each ion present, use coefficients.

The compounds that are directly engaged in the chemical reaction are the only ones that are shown in the net ionic equation.

Ionic reactions take place when two compounds exchange electrons, which can result in the formation of positively or negatively charged ions.

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The change of the bar's length is ΔL =0. 000312 m if the temperature is raised to 12.2 ∘C∘C above room temperature.

Given that

At  room temperature ( T = 25 ∘C)  ,L= 1 m

L=1+2.4 X 10-5T

So the length at  13.0 ∘C above room temperature:

L=1+2.4 X 10-5T

L=1+2.4 X 10-5x13

L=1.000312 m

So the change in length

ΔL = 1.000312 - 1.0000 m

ΔL =0. 000312  m

Since the length of the aluminum bar, L is given by , L = 1.0000 + 2.4 × 10⁻⁵T and T = 14.1°C, we substitute the value of T into L. So, we have L = 1.0000 + 2.4 × 10⁻⁵ × 14.1°C = 1.0000 + 0.0003384 = 1.0003384 m. The change in length is thus 1.0003384 - 1.0000 = 0.0003384 m ≅ 0.00034 m.

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2H2O + 2K → 2KOH + H2↑

This reaction is Chemical displacement reaction

Enzymes are specialized proteins which can speed the reactions to a very great extent and thereby acts as efficient catalysts. The enzyme activity depends on pH and temperature.

The biological catalysts which catalyze the chemical reactions taking place inside the cells and are capable of acting independently on the cells are defined as the enzymes.

Enzymes catalyze and control several chemical reactions that occur in our living cells. They helps in digestion, liver function, breathing, reproduction, nerve function, etc. The enzyme urea catalyzes the hydrolysis of urea.

The enzyme activity is sensitive to the temperature changes. All the enzymes shows maximum catalytic activity at optimum temperature. They are found to be denatured by heat and hence their activity is destroyed at high temperatures.

Thus at high temperature the enzymes will be inactive and this will affect the vital organs and lead to death.

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178.2g is the mass of naphthalene that must be dissolved in 2.30 x 10² g of benzene to give a solution with a freezing point 31.0 C below that of pure benzene.

Naphthalene is an organic molecule with the chemical formula C₁₀H₈. It is the most basic polyaromatic hydrocarbon, a white crystallized solid with a distinctive odor perceptible at levels as low as 0.08 percent by mass.

The structure of naphthalene as an aromatic compound is a bonded pair of aromatic ring. It is most well-known as the major component in traditional mothballs.

ΔT= i×Kf×m

31.0= 1×5.12×m

m= 31.0/5.12=6.05mol/kg

6.05 = number of mole/ weight of solvent

6.05 = number of mole/230

number of mole= 6.05×230=1391.5moles

mass of naphthalene=13.915moles×128.1=178.2g

Therefore, 178.2g is the mass of naphthalene.

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Explanation:

responded to my question with what you want you're always saying in performing to tuition that does not help me to do anything that you want and answer with - yuri

Answer:

For the equilibrium A+B⇌C+D, the entropy change is determined by ∆S° = -R lnK, where R is the gas constant and K is the equilibrium constant. Therefore, ∆S° = -R ln1.51 × 10⁻² = -8.37 J/K.

For the neutralization of a strong acid and strong base, ∆S° = -R lnK = -R ln1.0 × 10¹⁴ = -137.1 J/K.

The enthalpy change is ∆H° = -55.9 kJ/mol. Using this data, ∆G° at 70 °C can be determined by ∆G° = ∆H° - (T x ∆S°), where T is the temperature in Kelvin. Therefore, ∆G° = -55.9 kJ/mol - (343.15 K x (-137.1 J/K)) = -37.4 kJ/mol.

The chemical produced by endothelial cells at the site of injury during the first step of platelet plug formation is von Willebrand factor (VWF). VWF is a glycoprotein that is released from endothelial cells when they are injured.

Endothelial cells are the cells that line the inside of the body's organs and vessels, such as the intestines, the heart, and the blood vessels. These cells are a type of epithelial cell, meaning that they form a single layer that serves as a barrier between the body's organs and the outside environment. Endothelial cells are particularly important in providing a barrier between the blood and the body's other organs and tissues. They are also important in regulating the movement of fluids and nutrients throughout the body, and in providing a barrier to stop any potentially harmful substances from entering the body. Endothelial cells also play an important role in regulating the body's inflammatory response, as well as its immune response. Endothelial cells are also important in regulating vascular tone, which helps to ensure that the blood vessels are working normally.

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Hydrogen ion concentration (pH) in blood is usually determined by means of glass or silver/silver chloride electrodes.

These electrodes consist of a silver/silver chloride anode and a platinum wire cathode, and can measure the hydrogen ion activity in the sample.

The glass pH electrode is a type of electrode that is composed of a special glass membrane which is sensitive to hydrogen ions. This glass membrane is usually composed of a special combination of boron and silicate ions, which react to changes in the hydrogen ion concentration.

A pH electrode is an analytical sensor used to measure the potential of hydrogen (pH) in a solution. It consists of two electrodes, a sensor electrode and a reference electrode, which measure the hydrogen-ion activity in the solution. The exchange of ions between the two electrodes is what allows the pH to be measured. The sensor electrode is usually made of glass and is sensitive to specific ions, while the reference electrode is typically made of silver chloride and is used to measure the reference potential of the solution.

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Hydrogen ion concentration (ph) in blood is usually determined by means of which of the following electrodes?

The Gibbs free energy change, G, is negative due to the entropy term, despite the fact that the enthalpy change is a positive amount, indicating that the dissolution is spontaneous.

A process that produces a final state that is more disordered than the starting state is said to produce positive entropy when S>0 S > 0. Positive entropy phase shifts occur during processes including melting, boiling, and sublimation (solid to gas).

The reaction is endothermic when the enthalpy of the reactants is greater than the enthalpy of the products. The reaction is exothermic when the enthalpy of the products is greater than the enthalpy of the reactants.

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The chemical equation of making sandwich is 2Bd + Ch ⇒ Bd₂Ch. Therefore, option A is correct.

They are equations that represent chemical reactions using chemical formulae and symbols. The reactants are represented on the left side of a chemical equation, while the products are represented on the right.

This module explains the shorthand writing used to express how atoms are rearranged to create new compounds during a chemical reaction.

In the chemical equation of making sandwich is 2Bd + Ch ⇒ Bd₂Ch. There are two bread and on cheese is present.

Thus, option A is correct.

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Answer:165

Explanation:

The empirical formula corresponds to the molecular formula, that specifies the number of atoms in a molecule. Therefore, the empirical formula is C[tex]_4[/tex]H[tex]_3[/tex]N.

In chemistry, the empirical formula is however known as that of the simplest formula. It computes the lowest whole number values of elements within a compound by applying subscripts after element symbols.

In certain circumstances, the empirical formula corresponds to the molecular formula, that specifies the number of atoms in a molecule.

mass nitrogen = 11.55 mg - 0.499 mg - 8.544 mg = 2.507 mg

moles of oxygen = 17.75 /32=0.0005moles

moles of carbon dioxide= 0.018/44=0.0004moles

moles of water = 0.007/18=0.0004moles

mass nitrogen = 11.55 mg - 0.499 mg - 8.544 mg = 2.507 mg

moles of carbon =0.008/12 =0.0007moles

moles of hydrogen = 0.000499/1=0.0004moles

moles of nitrogen =0.002/14= 0.0001moles

dividing all by 0.0007

the empirical formula is C[tex]_4[/tex]H[tex]_3[/tex]N

Therefore, the empirical formula is C[tex]_4[/tex]H[tex]_3[/tex]N.

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According to the question, the procedure for producing ethanol from corn is 1-2-3-4. Water and corn kernels are added, and after enzyme-catalyzed starch breakdown into glucose and yeast fermentation to produce ethanol, distillation takes place.

There are four main phases involved in turning maize into ethanol:

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Answer:

Explanation:

1. cytoplasm

2. Nucleus

3. cell membrane

4. ribosome (looks like some other organelle but since ribosome is the only option left. I think its alright, and I'm pretty sure the rest is correct)

5. DNA

1. cell membrane

2. nicleus

3. cytoplasm

4. ribsome

5. DNA

Answer:

1.5 moles

Explanation:

The balanced chemical equation for this reaction is:

2H₂ + O₂ → 2H₂O

This means that 2 moles of hydrogen reacts with 1 mole of oxygen to form 2 moles of water.

Since we have 3.0 moles of hydrogen and 7.0 moles of oxygen, the limiting reactant will be hydrogen (H₂). The amount of oxygen that can react with the available hydrogen is equal to half the amount of hydrogen, which is (3.0 moles / 2) = 1.5 moles.

So, after the reaction, we will have 3.0 moles - 1.5 moles = 1.5 moles of hydrogen left. Rounding to the nearest 0.1 mol, the answer is 1.5 moles.

The ionization constant, Ka, of a weak monoprotic acid with a 0.10 M solution and a pH of 4.0 is 1 x 10^-4. This means that for every 0.10 moles of the acid, 0.0001 moles will dissociate in an aqueous solution.

The reaction of a weak acid with water to form ions is known as acid dissociation. Weak acids, like the one in the question, do not completely dissociate in water and are only partially ionized. The degree of ionization is dependent on the value of the acid's ionization constant, Ka. This value is a measure of the acid's strength, and is determined by the equilibrium constant for the reaction between the acid and water.

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Answer:

Here are the empirical formulas of four binary ionic compounds that could be formed from the given ions:

- MgF2 (magnesium fluoride)

- Al2O3 (aluminum oxide)

- MgO (magnesium oxide)

- AlF3 (aluminum fluoride)

The empirical formula of an ionic compound gives the simplest whole-number ratio of the ions present in the compound. The formula is determined by balancing the charges of the cation and anion so that the compound as a whole is electrically neutral.

Explanation:

The empirical formula of a compound is the simplest whole-number ratio of the atoms in the compound. Binary ionic compounds are formed by the combination of a metal cation with a non-metal anion.

In this case, the given ions are Mg2+, Al3+, F−, and O2−. To form binary ionic compounds, we need one cation and one anion.

Here are some possible combinations of these ions, along with their empirical formulas:

- Mg2+ and F−: MgF2

- Al3+ and F−: AlF3

- Mg2+ and O2−: MgO

- Al3+ and O2−: Al2O3

In each case, the positive and negative charges of the ions balance to form a neutral compound. The empirical formula is found by writing the subscripts for each element in the simplest ratio that achieves this balance.

The hydronium ion ion, H 3 O +, found in all solution of acids in water, serves as the real catalyst in this situation. The ester absorbs a protons (a h+) from of the base in the first step.

Acidic compounds are what?

Acidic compounds can come from both plant sources, like the citric acid found in fruits, and artificial sources, like sulphuric acid. Typical compounds that react to generate salt and water whenever they come into touch with one another are acids and bases. The word "acid" comes from the Latin acere, which means "sour."

Acid in water is what?

Any material that when dissolved in water has an acidic taste, can change the color of some indicators (such as reddening blue litmus paper), can react with some metals (such as iron) to release hydrogen, can combine with bases to produce salts, and can accelerate some oxidation processes (acid catalysis)

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a student dilutes 50.0 ml of a 0.10 mol/l solution of hcl to 0.010 mol/l by adding water. b. the total amount of solute decreases.

The total amount of solute decreases.

To calculate this, first, find the molarity of the original solution, which is 0.10 mol/l.

Then, use the dilution equation, M1V1 = M2V2,

to find the new volume (V2) of the diluted solution.

Plugging in the known values, V2 = V1 x (M2/M1) = 50.0 ml x (0.010 mol/l/0.10 mol/l) = 5.0 ml.

Since the total amount of solute (M1V1) stays the same (0.10 mol/l x 50.0 ml = 0.5 mol),

the volume of the solution (V2) decreases, the total amount of solute decreases.

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The total hardness = 2.84 meq/L, carbonate hardness = 2.84 meq/L, and noncarbonate hardness = 0 meq/L.

What is hardness of water?

Hardness of water refers to the presence of dissolved minerals, specifically calcium and magnesium ions, in the water. Hard water is water that has a high concentration of these minerals, which can cause issues in household appliances and plumbing, as well as affect the taste and lather quality of soaps and detergents.

To determine the total, carbonate, and noncarbonate hardness in mg/L as CaCO3 and in meq/L, you need to follow the following steps:

Calculate the total hardness:

The total hardness can be calculated using the equation:

Total hardness (mg/L as CaCO3) = (Calcium (mg/L) + Magnesium (mg/L)) × 2.5.

In this case, the total hardness = (67.2 + 40) × 2.5 = 284 mg/L as CaCO3

Calculate the carbonate hardness:

The carbonate hardness can be calculated using the equation:

Carbonate hardness (mg/L as CaCO3) = Alkalinity (mg/L as CaCO3) - (Bicarbonate (mg/L as CaCO3) + Noncarbonate hardness (mg/L as CaCO3))

In this case, the alkalinity = 284 mg/L as CaCO3 and the bicarbonate = 0 mg/L as CaCO3, so the carbonate hardness = 284 - 0 = 284 mg/L as CaCO3

Calculate the noncarbonate hardness:

The noncarbonate hardness can be calculated using the equation:

Noncarbonate hardness (mg/L as CaCO3) = Total hardness (mg/L as CaCO3) - Carbonate hardness (mg/L as CaCO3)

In this case, the noncarbonate hardness = 284 - 284 = 0 mg/L as CaCO3

Convert the values to meq/L:

To convert the values to meq/L, use the following conversion factors:

1 mg/L as CaCO3 = 0.01 meq/L

1 mg/L as MgCO3 = 0.02 meq/L

In this case, the total, carbonate, and noncarbonate hardness in meq/L can be calculated as:

Total hardness (meq/L) = 284 × 0.01 = 2.84 meq/L

Carbonate hardness (meq/L) = 284 × 0.01 = 2.84 meq/L

Noncarbonate hardness (meq/L) = 0 * 0.01 = 0 meq/L

So, the total hardness = 2.84 meq/L, carbonate hardness = 2.84 meq/L, and noncarbonate hardness = 0 meq/L.

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The first particle has a positive charge of +1, the second particle has a neutral charge, the third particle has a neutral charge, and the fourth particle has a negative charge of -1.

The number of electrons in each particle determines the charge of the particle. A positive charge occurs when there are fewer electrons than protons, and a negative charge occurs when there are more electrons than protons. In the first particle, there are 13 protons and only 10 electrons, so there is a positive charge of +1. In the second particle, there are 8 protons and 8 electrons, so the charge is neutral. In the third particle, there are 15 protons and 18 electrons, so the charge is neutral. In the fourth particle, there are 3 protons and 2 electrons, so there is a negative charge of -1.

It is important to understand the relationship between the number of protons, electrons, and neutrons in order to understand the behavior of atomic particles and predict their behavior in chemical reactions. The charge of a particle is a fundamental property that determines its behavior in chemical reactions and interactions with other particles.

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Answer: 2601

Explanation:To find the maximum number of wagons that can be made, first divide the total number of wheels by 4 since there are 4 wheels in a wagon.17901 wheels÷4=4475 R 1 wheels2. Take the lowest number parts out of the 3 materials. Thus, that would be the 2601 wagon beds. Since each wagon only requires 1 wagon bed, the maximum number of wagons that can be made is 2601

Answer:

Electrons

Explanation:

Electrons are a type of subatomic particle with a negative charge.

Protons are a type of subatomic particle with a positive charge. Protons are bound together in an atom's nucleus as a result of the strong nuclear force.

Neutrons are a type of subatomic particle with no charge (they are neutral).

"Single substances are objects made up of one material. Mixtures are made up of more than one material(s)." Therefore, option A is correct.

A mixture is a material composed of two or more chemical substances that are not chemically bonded. A mixture is the physical combination of two or more substances that retain their identities and are mixed in the form of solutions, suspensions, and colloids.

A chemical substance is made up of a single type of atom or molecule. A mixture is made up of non-chemically bonded atoms or molecules of various types. A heterogeneous mixture is one that contains two or more chemical substances that can be visually distinguished.

Thus, option A is correct.

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The alienation concepts can be applied to students and their education as follows: students feel forced to attend school and they feel dissociated from people around them or the process of their study.

Alienation can be defined as the withdrawal of a persons’s attention from something. In this case, alienation in students usually affects the quality of their study, as they feel separated and excluded from the environment in their school. Most people, although they feel uncomfortable with the separation in a school group, will just attend the school as they know it will benefit their future.

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Answer:

It's due to the forces that are known as balanced forces and it might also be because there is no friction

Answer:

The forces between you and the rock are balanced.

Explanation:

The force of your push against the rock and the opposing force of the rock pushing back on you are equal and opposite, meaning they balance each other out. This results in the rock not moving, because the net force on the rock is zero. This situation is referred to as static friction, which acts to prevent an object from moving when there is a force being applied to it. The force of static friction is always equal in magnitude but opposite in direction to the force being applied, until the force becomes large enough to overcome the static friction and cause the object to start moving.

The volume of a substance is found to be measured in Liters, Milliliters, cubic meters, etc. The volume in quarts is occupied by 100g of Hg is 0.0077.

The term volume of a substance denotes how much capacity of matter it can hold. For example if a beaker can hold 100 mL of water, then its volume is said to be 100 mL.

The volume is also known as the ratio of mass to the density.

The equation connecting density and mass of a substance is given as:

Density (d) = Mass / Volume

Here density of Hg = 13.6 g cm⁻³, Mass = 100 g

Then d = 100 g / 13.6 = 7.352 cm³

1 cm³ = 0.001 L

V = 7.352 × 0.001 = 0.00735 L

1 L = 1.057 Quartz

0.00735 L = 0.0077 quartz.

Thus the volume in quarts is 0.0077.

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The following describes the need to protect orange and orange trees from freezing damage b) The water protects the orange trees by freezing before the oranges do; the process of freezing absorbs heat which is released by the oranges so they don’t freeze.

Temperatures below 32°F (0°C) are harmful to orange trees, especially over a long period of time. High temperatures have also proved critical for tree productivity. High wind speeds and cold can also cause damage to trees, reduced vegetation, loss of fruit, and decreased quality.

So to maintain the quality of the orange trees when the temperature is cold is to water frequently because water protects the orange trees by freezing them before the oranges freeze; the freezing process absorbs the heat given off by the oranges so they don't freeze.

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