When argon is placed in a container of neon, the argon spontaneously disperses throughout the neon because _____.a. of the large attractive forces between argon and neon atomsb. of hydrogen bondingc. a decrease in energy occurs when the two mixd. the dispersion of argon atoms produces an increase in disordere. of solvent-solute interactions

Answer:To calculate the molar mass, first calculate the number of moles of gas using the ideal gas equation. 1 atm. 750 mmHg. (1.00 L). 760 mmHg. 0.0306 mol. L atm.

Explanation:

Block of ice of mass 59.5g contains 19.87 ×10²³molecules and 39.75×10²³ atoms.

Molecular mass of Water is 18g/mol

No. of moles = Given mass /Molecular mass

No. of moles of water = 59.5/18 (Given, mass of block of ice is 59.5g)

                                    = 3.3moles.

1mol of water contains 6.023×10²³ molecules of water.

Then,3.3 moles of water contains ,

3.3×  6.023×10²³= 19.87 ×10²³molecules.

1mol of water (H₂O) contains,2×  6.023×10²³ atoms of hydrogen

Then, 3.3 moles of water contains,

2×3.3×  6.023×10²³ = 39.75×10²³ atoms of hydrogen.

Thus, the molecules and atoms present in the block of ice of mass 59.5g is 19.87 ×10²³molecules and 39.75×10²³ atoms respectively.

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Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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0.750 moles of C12H22O11 are needed to prepare 2.50 L of a 0.300 M solution.

Molarity is a measure of concentration that can be used to determine how many moles of a particular substance are needed to prepare a given volume of a solution with a given concentration. In this problem, we are asked to calculate how many moles of C12H22O11 are needed to prepare 2.50 L of a 0.300 M solution.

To solve this problem, we will first use the molarity equation, which states that molarity (M) is equal to the moles of solute (n) divided by the volume of solution (V):

M = n/V

We can then rearrange the equation to calculate the number of moles of solute needed to prepare a given volume of solution with a given molarity:

n = M x V

Plugging in the values from the problem, we get:

n = 0.300 M x 2.50 L

This yields a result of 0.750 moles of C12H22O11 needed to prepare 2.50 L of a 0.300 M solution.

Alternatively, if we were given the moles of solute needed to prepare a given volume of solution with a given molarity, we could use the molarity equation to calculate the molarity of the solution. For example, if we were given that 0.430 moles of C12H22O11 are needed to prepare 2.50 L of a solution, then we could calculate the molarity of the solution as follows:

M = n/V

M = 0.430 moles / 2.50 L

This yields a result of 0.172 M.

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The element X is titanium.

According to the question, the percentage by mass of Cl in XCl4  is 75.0%.

The percentage by mass is obtained from;

Mass of element in the compound/molar mass of compound * 100

Hence;

Let the mass of the unknown element be X

75 = 142/X + 142 * 100

75 (X + 142) = 142 * 100

75X + 10650 = 14200

75X =  14200 - 10650

X = 14200 - 10650/75

X = 47

Hence, X is titanium.

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Answer:

"Water and ethyl alcohol will both have dipole-dipole interactions.

Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges.

Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces."

Explanation:

Here is the place I found the answer:  https://socratic.org/questions/which-of-these-structures-has-dipole-dipole-interactions-water-h2o-ethyl-alcohol

All of this answer belongs to that person. I do not own any of this information.

Answer:

3

Explanation:

there are 3 significant figures in this number because of 6.01

The 4s orbitals are filled first because, according to our theory, they have a lower energy than the 3d orbitals. We are aware that the 4s electrons are lost first when an atom ionizes.

The highest energy level electrons that are lost first are those that are most far from the nucleus' influence. A higher energy must therefore exist in the 4s orbital than in the 3d orbitals.

The electron is a subatomic particle with the symbol e or with an electric charge of one elementaryly negative charge. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles.

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The molecule which would have the highest boiling point is 2-methylhexane. Thus, the correct option will be D.

The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure. The boiling point of a liquid is a measure of its vapor pressure. The higher the boiling point, the higher the vapor pressure of the liquid, and the more heat is required to vaporize it.

The boiling point of a substance is affected by the strength and types of intermolecular forces. The stronger the intermolecular forces, the higher the boiling point. 2-methylhexane has highest boiling point because it has the highest number of carbons and branches, which contribute to its strong intermolecular forces that lead to a higher boiling point.

Therefore, the correct option is D.

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Answer:

white phosphorus is P4 in a tetrahedral shape and there are some really cool videos of it reacting in air and some not very cool ones where it was used militarily it is not stable, it needs to be stored underwater

red phosphorus is a larger more complicated network solid with many more phosphorus and is very stable

they are allotropes of phosphorus

Explanation:

The main answer to the question is: The test statistic is 51.20 and the critical values are 9.591 and 34.170.

To explain the main answer, we are conducting a hypothesis test to determine if the population standard deviation of the pH of rain is indeed 0.5, as suggested by the theory. The null hypothesis (H0) is that the population standard deviation is 0.5, while the alternative hypothesis (H1) is that the population standard deviation is not 0.5.

In this case, we are given a random sample of 21 rainy days, and the sample standard deviation is 0.8. To test the hypothesis, we need to calculate the test statistic, which is given by the formula: test statistic = [(sample standard deviation) - (hypothesized standard deviation)] / (sample standard deviation / sqrt(sample size)).

Plugging in the values, we get: test statistic = [(0.8 - 0.5) / (0.8 / sqrt(21))] = 51.20.

To determine the critical values, we need to look at the critical region associated with the given significance level (alpha) of 0.05. Since this is a two-tailed test, we divide the significance level by 2, resulting in an alpha of 0.025 for each tail. Using the degrees of freedom (n-1), which is 20 in this case, we can consult the t-distribution table or use a statistical software to find the critical t-values. For an alpha of 0.025 and 20 degrees of freedom, the critical t-values are approximately ±2.093.

Converting the t-values to critical values using the formula: critical value = (hypothesized standard deviation) + (t-value * (sample standard deviation / sqrt(sample size))), we get: critical values = 0.5 + (2.093 * (0.8 / sqrt(21))) = 9.591 and 0.5 - (2.093 * (0.8 / sqrt(21))) = 34.170.

Therefore, the correct answer is: The test statistic is 51.20 and the critical values are 9.591 and 34.170.

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The balanced chemical equation for the acid-base reaction is:

2HCl + Ca(OH)2 → CaCl2 + 2H2O

A balanced chemical equation is a representation of a chemical reaction that shows the relative number of reactant and product molecules involved. It follows the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. In a balanced equation, the number of atoms of each element on both sides of the equation is equal.

A balanced chemical equation includes chemical formulas of reactants on the left side of the arrow and the chemical formulas of products on the right side. Coefficients are used to balance the equation by adjusting the number of molecules or moles of each substance involved. These coefficients indicate the relative stoichiometric ratios between reactants and products.

According to the equation, for every 1 molecule of CaCl2 that forms, 2 water molecules are produced. Therefore, the correct answer is:

twice as many, 2x

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D). The rocky mountains are part of the same mountain range as the Andes. The Andes mountain range is located in South America and stretches over 4,000 miles, making it the longest continental mountain range in the world.

The Rocky Mountains are located in North America and stretch from Alaska down to New Mexico. While the two mountain ranges are separated by thousands of miles, they are both part of the same mountain-building process that took place millions of years ago.

The movement of tectonic plates caused the land to buckle and fold, creating these massive mountain ranges. The Andes and Rocky Mountains are also known for their rich mineral deposits, including gold, silver, and copper. Both mountain ranges have played important roles in the history and culture of their respective regions, and continue to attract tourists and outdoor enthusiasts from around the world.

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Answer:

those have symbols for their Latin or Greek name

Explanation:

hope it helps

Answer:

Na number of 11

Explanation:

Pb no. 82

Au no. 79

Cu no. 29

Hg no. 80

Answer:

1. Make sure that there is the same amount of each type of element on the product and reactant side to ensure it is balanced.

2. Balance equations by only changing the coefficients of the compounds and not the subscripts of the compound, since if you change the subscript, you change the identity of the compound (on either reactant or product side)

Answer:

its B

Explanation:i took the test

Answer:

I believe the answer is ; explains natural phenomena.

Explanation:

Answer:

D

Explanation:

sound waves can not be carried in space

Answer:D

Because space us silent

Answer:

Answer:

0.1715 atm

Explanation:

We use the Ideal gas equation to calculate this

Mathematically;

PV = nRT

rearranging, we have

P = nRT/V

from the question, we have

n = 0.002 moles

R = 0.082

T = 250 = 250 + 273 = 523 K

V = 500 ml = 500/1000 = 0.5 L

Plugging the values we have;

P = (0.002 * 0.082 * 523)/0.5

P = 0.1715 atm

Answer:

true

Explanation:

        This statement is true because the tension in the strings creates potential energy. Since a guitar's strings are being "pulled" between the headstock and bridge, there is tension.

        This statement would not be true if the strings were laying on the ground without being pulled, but since guitar strings are then this statement is true.

a) The explosiveness of hydrogen gas is a chemical property.

b) The bronze color of copper is a physical property.

c) The shiny appearance of silver is a physical property.

d) The ability of dry ice to sublime (change from solid directly to vapor) is a physical property.

Chemical properties are properties that describe the behavior of a substance during a chemical reaction or a chemical change. Explosiveness of hydrogen gas is an example of a chemical property because it describes how hydrogen gas reacts with oxygen to form water and how the reaction releases a large amount of energy in the form of an explosion.

Physical properties, on the other hand, are properties that describe the characteristics of a substance that can be observed or measured without changing the composition of the substance. Examples of physical properties include the color, texture, and melting point of a substance. The bronze color of copper and the shiny appearance of silver are both examples of physical properties.

The ability of dry ice to sublime (change from solid directly to vapor) is also a physical property because it describes a physical change that occurs when dry ice is heated or exposed to high pressure.

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Answer:

*Snif*Snif*UnU so powerful

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.

The balanced chemical equation for the reaction of hydrogen gas and oxygen gas to form water is:

2 H2(g) + O2(g) → 2 H2O(g)

According to the stoichiometry of the reaction, 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water.

To determine the limiting reactant, we can compare the amount of each reactant to the stoichiometric ratio. Since we have 5.00 mol of both hydrogen and oxygen, we can calculate the moles of water produced from each reactant:

Hydrogen: 5.00 mol H2 × (2 mol H2O / 2 mol H2) = 5.00 mol H2O

Oxygen: 5.00 mol O2 × (2 mol H2O / 1 mol O2) = 10.00 mol H2O

From the calculations above, we can see that oxygen is the limiting reactant because it produces less moles of water than hydrogen. Therefore, the number of moles of steam produced is 10.00 moles (2 × 5.00 moles of water).

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The pH values of the solution after the addition of various amounts of acids are as follows:

(a) When 0.0 mL HCl is added; pH = 11.62

(b) After adding 10.0 mL of 0.100 M HCl; pH = 12.38

(c) After adding 30.0 mL of 0.100 M HCl; pH = 14

(d) After adding 40.0 mL of 0.100 M HCl; pH = 2.70

The equation of the reaction between NH₃ and HCl is:

NH₃ + HCl → NH₄Cl

Before the addition of HCl:

The concentration of NH₃ solution = 0.300 M

The initial concentration of OH- can be calculated from the Kb of NH₃ :

Kb = [NH₄⁺][OH⁻] / [NH₃]

1.8 x 10⁻⁵ = x² / 0.300

x = 0.0024 M

The initial concentration of OH⁻ is 0.0024 M, and the initial pH of the solution ill be:

pH = 14 - pOH

pH = 14 - (-log[OH-])

pH = 11.62

(a) When 0.0 mL HCl is added;

pH = 11.62

(b) After adding 10.0 mL of 0.100 M HCl;

moles of HCl added = (0.100 mol/L) x (0.0100 L)

moles of HCl added = 0.00100 mol

The moles of NH₃ initially present = (0.300 mol/L) x (0.0100 L)

moles of NH₃ initially present = 0.00300 mol

the mole ratio of HCl and NH₃ = 1:1

The remaining moles of NH₃ = 0.00300 mol - 0.00100 mol

remaining moles of NH₃ = 0.00200 mol

The volume of the solution is now 10.0 mL + 10.0 mL = 20.0 mL or 0.0200 L.

The new concentration of NH₃ = 0.00200 mol / 0.0200 L

concentration of NH₃ = 0.100 M

The concentration of OH- can be calculated from the Kb of NH₃ using the new concentration of NH4+:

Kb = [NH4+][OH-] / [NH3]

1.8 x 10⁵ = x² / 0.100

x = 0.0042 M

The new concentration of OH- is 0.0042 M, and the new pH will be:

pH = 14 - (-log[OH-])

pH = 12.38

(c) After adding 30.0 mL of 0.100 M HCl;

the volume of the solution is 40.0 mL or 0.0400 L

The moles of HCl added = (0.100 mol/L) x (0.0300 L)

moles of HCl added = 0.00300 mol

moles NH3 reacted = 0.00300 mol - 0.00300 mol

moles NH3 reacted = 0.00000 mol

[NH₄⁺] remaining [OH⁻] = 0

The concentration of OH- is 0 M, so the pH = 14 - (-log[OH-])

pH = 14

(d) After adding 40.0 mL of 0.100 M HCl;

moles HCl = (0.100 mol/L) x (0.0400 L)

moles HCl = 0.00400 mol

The volume of solution = 0.050 L

All NH₃ has reacted and the remaining moles of HCl = (0.00400 mol - 0.00300 mol) / 0.0500 L

the remaining moles of HCl = 0.00200 M

The concentration of H₃O⁺ can be calculated from the concentration of HCl:

0.00200 M HCl produces 0.00200 M H₃O⁺

pH = -log[H₃O⁺]

pH = -log(0.00200)

pH = 2.70

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Answer:

somewhere

Explanation:

1- \(Al_{2}SiO_{5}\) polymorphs (andalusite, kyanite, and sillimanite) are useful indicators of the general conditions of metamorphism in metamorphic rocks because each polymorph forms at different pressures and temperatures.

Andalusite forms at low pressures and temperatures, kyanite forms at high pressures and temperatures, and sillimanite forms at even higher pressures and temperatures.

Therefore, the presence or absence of each polymorph can give insight into the depth and temperature of metamorphism that the rock has experienced.

2- Sr isotopes can help identify the origins of granitic magmas in the continental crust because different sources have different isotopic compositions.

For example, granitic magmas that originated from the mantle will have a different Sr isotope ratio compared to those that originated from the continental crust.

By analyzing the Sr isotopes in the granite, geologists can determine the source of the magma and gain a better understanding of the geologic history of the region.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L}\\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{5.00 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 830.5647..\)

We have the final answer as

Hope this helps you