Is each of the following very soluble in water? Explain.
(b) Sodium hydroxide

Answer:

24

Explanation:

2.40*10=24.0

Using the specified mass and each compound's respective molecular weights, we can compare the number of moles of each compound:

CH4O: Methyl alcohol has a molecular weight of about 32 g/mol.The formula for calculating the number of moles of CH4O is (mass of CH4O) / (molecular weight of CH4O): 2.0 g / 32 g/mol = 0.0625 moles.
H2O: H2O (water) has a molecular weight of about 18 g/mol.H2O's mass divided by its molecular weight yields the number of moles: 2.0 g divided by 18 g/mol, or 0.111 moles.
CHO: CHO (formaldehyde) has a molecular weight of about 30 g/mol.The formula for calculating the number of moles of CHO is (mass of CHO) / (molecular weight of CHO): 2.0 g / 30 g/mol = 0.067 moles.Consequently, the chemicals are CH4O CHO H2O in ascending molecular weight order.


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Answer:

Having high melting point.

Explanation:

The original product has high melting point as compared to the mixture product because in the original product, the element is present in its pure state and we know that pure substances have high melting point as compared to mixture substances due to the presence of strong intercellular forces between them which is hard to break so that's why we can say that the original product has high melting point.

Answer:

B. They don't have enough energy to overcome the attractions between them.

Answer:They don't have enough energy to overcome the attractions

between them.

Explanation:

A. They have no motion and cannot even vibrate in place.

B. They don't have enough energy to overcome the attractions

between them.

C. They bounce off the walls of their container and back into place.

D. They move independently of one another.

Answer: The Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice

Explanation:Ap3x

The correct statement about the viscocity of the maple syrup is that the Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.

The resistance of a fluid (liquid or gas) to a change in shape or movement of adjacent sections relative to one another is called viscosity. Viscosity indicates resistance to flow.

Hence the correct statement is that the Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.

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Answer:

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. Salts are also formed in this reaction.

Explanation:

Answer:

The answer is mitochondrion

Answer:

B) Mitochondrion

Explanation:

I took the question, and got it right.

The work function of the metal is 5.2 * 10^-19 J while the number of electrons is 2.3 * 10^12 electrons.

From the photoelectric theory of Einstein, electrons are emitted when light of appropriate wavelength is incident on a clean metal surface. The minimum energy that the incident light must possess is called the  work function of the metal.

We know that;

Kinetic energy = Energy of incident photon - Work function

Energy of incident photon = hf = 6.6 * 10^-34 Js * 1.34×10^15 s−1

= 8.8 * 10^-19 J

Work function = Energy of incident photon - Kinetic energy

Work function = 8.8 * 10^-19 J - 3.60×10^−19 J

Work function = 5.2 * 10^-19 J

Now;

The total energy = 3.67×10−7 J

Hence;

3.67×10−7 J = n * 1.6 * 10^-19 J

n = 3.67×10−7 J/1.6 * 10^-19 J

n = 2.3 * 10^12 electrons

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Answer: C: an electron

Explanation:

Answer:

C: electrons

Explanation:

Answer:

1.772 gram is the approximate answer

Explanation:

molecular mass of AlCl3 is 132 g per mole and of Al(OH)3 is 78 g per mole

the reaction is

AlCl3 + 3 NaOH ---> Al(OH)3 + 3 NaCl

from the reaction it is clear that 1 mole AlCl3 makes 1 mole Al(OH)3

implies 132g AlCl3 gives 78g Al(OH)3

Implies 3g AlCl3 gives

3*122/78 = 1.772 grams

The mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

To find the mass of 50,000 molecules of methane, we need to multiply the mass of one methane molecule by the number of molecules.

Given:

Mass of one methane molecule = 2.7 × 10⁻²³ gram

Number of methane molecules = 50,000

To calculate the mass of 50,000 molecules of methane, we can use the following equation:

Mass = (Mass of one molecule) × (Number of molecules)

Mass = (2.7 × 10⁻²³ gram) × (50,000)

Now, let's calculate the mass:

Mass = 2.7 × 10⁻²³ × 50,000

Mass = 1.35 × 10⁻¹⁸ gram

Therefore, the mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

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This is cis transformation of the molecular structure.

Molecular structure refers to the three-dimensional arrangement of atoms in a molecule and the chemical bonds that hold those atoms together. The molecular structure of a compound determines its physical and chemical properties, including its reactivity, solubility, boiling point, and melting point. The arrangement of atoms in a molecule is determined by the number and types of atoms present, as well as the strength and directionality of the chemical bonds between them. The shape of a molecule is also influenced by the presence of lone pairs of electrons, which can affect the overall geometry of the molecule. Molecular structure can be determined using various techniques, including X-ray crystallography, spectroscopy, and computational methods. Understanding the molecular structure of a compound is important for a variety of applications, including drug design, materials science, and chemical synthesis.

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To calculate the weight of Y that would be removed from the water solution with each extraction, we need to use the following steps:

Determine the initial concentration of Y in the water solution. The initial concentration can be calculated using the total mass of Y in the solution, the volume of the solution, and the number of moles of Y per mole of solution.

Determine the amount of Y removed during each extraction. The amount of Y removed can be calculated using the volume of the extraction solvent (in this case, methylene chloride) and the molar mass of Y.

Calculate the final concentration of Y in the water solution after each extraction. The final concentration can be calculated using the initial concentration, the amount of Y removed during each extraction, and the volume of the solution.

Here is the calculation:

The initial concentration of Y in the water solution can be calculated using the total mass of Y in the solution (m), the volume of the solution (V), and the number of moles of Y per mole of solution (n).

Y initial concentration = m / n

For example, if the total mass of Y in the solution is 1.0 g, the volume of the solution is 100 mL, and the number of moles of Y per mole of solution is 1, then the initial concentration of Y in the solution would be 1.0 g / 1 mol/100 mL = 1 g/mL.

The amount of Y removed during each extraction can be calculated using the volume of the extraction solvent (mL) and the molar mass of Y (M).

Y removed per extraction = mL * M

For example, if the volume of the extraction solvent is 70 mL and the molar mass of Y is 120 g/mol, then the amount of Y removed per extraction would be 70 mL * 120 g/mol = 8400 g.

The final concentration of Y in the water solution after each extraction can be calculated using the initial concentration, the amount of Y removed during each extraction, and the volume of the solution.

Final Y concentration after extraction = (initial Y concentration - Y removed per extraction) / V

For example, if the initial concentration of Y in the solution is 1 g/mL, the amount of Y removed per extraction is 8400 g, and the volume of the solution is 100 mL, then the final Y concentration after extraction would be (1 - 8400 g/mL) / 100 mL = 0.1 g/mL.

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Alpha if I remember correctly.

Answer:

alpha

Explanation:

because I think it is

Answer:

The liquid in this barometer would be 8416.393 milimeters. Explanation: Since hydrostatic pressure is directly proportional to fluid density ( ),

Explanation:

Metallic bond, force that holds atoms together in a metallic substance

Explanation:

First, we need to know that Calcium oxide is:

CaO.

Molar mass of it is:

Ca = 40 g/mol

O = 16 g/mol

CaO = 56 g/mol

To discover the number in moles of 5.45 g of CaO we just need to use the following formula:

n = m/MM

m = 5.45

MM = 56 g/mol

n = 5.45/56

n = 0.09732 moles

Answer:

0.09732 moles

This is a perfect answer

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Primary source documents that can confirm the use of buttonhooks in the medical inspection of immigrants include medical reports and journals, photographs, and immigration records.

To confirm the use of buttonhooks in the medical inspection of immigrants, one can refer to primary sources such as medical reports and journals from the early 20th century.

These documents may contain descriptions of the medical examinations performed on immigrants and the tools used during the process. Photographs taken during this time may also provide evidence of the use of buttonhooks or other medical instruments.

Additionally, immigration records from the time may contain information on the medical inspections conducted on immigrants, including details on the tools used.

By consulting a variety of primary source materials, researchers can gather evidence that supports the historical use of buttonhooks in the medical inspection of immigrants.

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Calcium ions play an essential role in intracellular signal transduction. They act as regulatory messengers by binding to an array of calcium-binding proteins, which activate downstream intracellular pathways.

Correct option is A.

The most important of these are calcium-binding proteins called globulins, which act as a bridge between the calcium-binding receptors, the calcium ions, and the intracellular cascades. Calcitriol, calcitonin, calcotropin, and calmodulin are four of the most prevalent calcium-binding globulins in the body.

Calcitriol is a vitamin D derived hormone that helps regulate calcium and phosphorous homeostasis. Calcitonin is a peptide hormone secreted by the thyroid gland that helps regulate calcium levels in the blood. Calcotropin is another hormone secreted by the pituitary gland that increases calcium levels in the blood.

Correct option is A.

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Answer:

3.4g

Explanation:

Given parameters:

Mass of ethanol  = 2.911g

Unknown:

Mass of water vapor = ?

Solution:

To solve this problem, let us write the balanced reaction equation first;

             C₂H₅OH  + 3O₂  → 2CO₂  + 3H₂O

Now find the number of moles of ethanol;

  Number of moles  = \(\frac{mass}{molar mass}\)

    Molar mass of ethanol = 2(12) + 5(1) + 16 + 1 = 46g/mol

  Number of moles  = \(\frac{2.911}{46}\)   = 0.06mole

  So;

       1 mole of ethanol will produce 3 moles of water vapor

      0.06mole of ethanol will produce 0.06 x 3  = 0.19moles of water vapor

 Mass of water vapor  = number of moles x molar mass

   Molar mass of H₂O  = 2(1) + 16  = 18g/mol

  Mass of water vapor  = 0.19 x 18  = 3.4g

The molecular formula for the compound is \(C_{4} H_{8}\) .

% of C = 79.85%

% of H = 20.15%

Let the mass of the compound be 100g, then

Mass of C = 70.85 g

Mass of H = 20.15 g

Molar mass = 60.15 g/mol

Moles of Carbon = \(\frac{79.85}{12.01 g/mol}\)

                             = \(6.64 mol\)

Moles of Hydrogen = \(\frac{20.15}{1.00794 g/mol}\)

                                 = \(19.99 mol\)

And we divide both sides by the lower quantity;

\(C_{\frac{6.64 mol}{6.64 mol} } H_{\frac{19.99 mol}{6.64 mol} }\) ≅ CH₂

And \((empirical formula)_{n} = molecular formula\)

60.15 g/mol = n × ( 12.01 + 2 × 1.00794)

n = 4

Therefore, the molecular formula for the compound is \(C_{4} H_{8}\) .

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Answer:

2H2+O2=2H2o

Explanation:

We have 2 hydrogens, 2 oxygens on the left-hand side.

But only 1 O on the right-hand side.

let's place a 2 before H2O (water)

Do you drink H2O every day?

But balancing the O unbalanced H

So the balanced chemical equation will look like this:

2H2O+O2=2H2O

Accuracy refers to how close the measurements that are made are to the real value.

The term accuracy refers to how close the measurements that are made are to the real value. The precision refers to how close the measurements are to each other in value. But precision and accuracy play a role in deciding whether or not a measurement is accurate.

Looking at the table;

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The volume of carbon dioxide formed at 2.25 atm and 75.0°C will be X liters, based on the number of moles calculated using the ideal gas law.

First, we need to determine the balanced equation for the reaction between methane and oxygen, which yields carbon dioxide and water as products. The balanced equation is:

CH4 + 2O2 → CO2 + 2H2O

From the equation, we can see that one molecule of methane produces one molecule of carbon dioxide. Since the given volume of methane is 2.50 L, we can conclude that the volume of carbon dioxide formed will also be 2.50 L.

To calculate the volume of carbon dioxide at different conditions (2.25 atm and 75.0°C), we can use the ideal gas law. Rearranging the ideal gas law equation to solve for V, we have V = (nRT)/P, where V is the volume, n is the number of moles, R is the ideal gas constant, T is the temperature in Kelvin, and P is the pressure.

First, let's calculate the number of moles of carbon dioxide formed using the volume and conditions given. Convert the temperature of 75.0°C to Kelvin by adding 273.15, resulting in 348.15 K. We can calculate the number of moles using the ideal gas law equation: n = (PV)/(RT). Substitute the values for pressure (2.25 atm), volume (2.50 L), and temperature (348.15 K) into the equation, along with the ideal gas constant (0.0821 L·atm/(mol·K)). The resulting value will give us the number of moles of carbon dioxide formed.

Since we know that one mole of carbon dioxide occupies one mole of volume, the number of moles calculated above will also represent the volume of carbon dioxide in liters. Therefore, the volume of carbon dioxide formed at 2.25 atm and 75.0°C will be X liters, based on the number of moles calculated using the ideal gas law.

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Answer: A

Explanation:

JUST TOOK THE TEST

The statement is true. The catalyzed decomposition of NH3(g) at high temperature is represented by the equation:

2 NH3(g) ⇌ N2(g) + 3 H2(g)

This reaction is catalyzed by certain metal oxides, such as iron oxide, at high temperatures (around 600-700°C). The catalyst provides a surface for the reaction to take place and lowers the activation energy needed for the reaction to occur.

The decomposition of NH3 is an important industrial process, as it can be used to produce hydrogen gas and nitrogen gas. These gases have various applications, such as in the production of ammonia, fertilizers, and other chemicals.

In summary, the statement is true. The catalyzed decomposition of NH3 at high temperature is represented by the above equation and is an important industrial process.

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Answer:

calcium oxide

Explanation:

its stable

There are several metals which can be used to reduce the metal oxides to corresponding metals. Carbon is an efficient reducing agent. Here Calcium oxide cannot be reduced to calcium by carbon. The correct option is C.

The reaction of metals with oxygen result in the formation of oxygen containing compounds called metal oxides. The binary compounds of oxygen with lesser electronegative elements are called oxides. Most of the stable oxides have 'O' in its -2 oxidation state. Na₂O, CO₂, etc. are some oxides.

Carbon is a reducing agent and it is present above the elements like 'Zn', 'Cu', 'Fe', 'Ag', etc. in the electrochemical series. But the oxides of highly reactive metals cannot be reduced with carbon. Because these metals have more affinity for oxygen than carbon.

The highly reactive metals are extracted by using the electrolytic reduction of their molten chloride. It is not possible for carbon to reduce the oxides of metals like 'Na', 'Ca', 'Al', etc.

Thus the correct option is C.

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