The presence of an alcohol group (-OH), __________ the ΔT value of a molecule compared to the presence of a methyl group (-CH3).
A. increases
B. decreases
C. stays the same

Cu(NO₃)₂: water, CS₂: hexane, CH₃CH₂OH: water, CH₃(CH₂)₁₆CH₂OH: water, HCl: water, C₆H6: hexane.

Polar solvents dissolve ionic and polar compounds, while non-polar solvents dissolve nonpolar compounds. The ionic compound Cu(NO₃)₂ will dissolve in water because water is a polar solvent, and it can form ion-dipole bonds with the ions. CS₂ is a nonpolar compound; it will dissolve in hexane because hexane is a nonpolar solvent. CH₃CH₂OH is a polar molecule that can form hydrogen bonds with water molecules; thus, it is soluble in water.

CH₃(CH₂)₁₆CH₂OH is a long-chain alcohol that can also form hydrogen bonds with water molecules, making it soluble in water. HCl is an ionic compound that will dissolve in water, which is a polar solvent. C₆H₆ is a nonpolar compound that can dissolve in hexane. Therefore, the solvent that will dissolve each of the above compounds are as follows:

a. Cu(NO₃)₂: water

b. CS₂: hexane

c. CH₃CH₂OH: water

d. CH₃(CH₂)₁₆CH₂OH: water

e. HCl: water

f. C6H6: hexane.

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A is the correct answer of above question

By using ideal gas law , water at 23°C and 745 mm Hg of total pressure, the volume it would have taken up would have been **0.87 L**.

In the limit of low pressures and high temperatures, the ideal gas law describes a relationship between a gas's pressure P, volume V, and temperature T such that the molecules of the gas move practically independently of one another. It can be derived from the kinetic theory of gases and is predicated on the following premises: (1) the gas is made up of numerous molecules that move randomly and in accordance with Newton's laws of motion; (2) the volume of the molecules is negligibly small in comparison to the volume occupied by the gas; and (3) no forces act on the molecules other than elastic collisions that last for a negligibly short period of time.

The ideal gas law can be used to resolve this issue. PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature in Kelvin, is the formula for the ideal gas law.

P = 760 mmHg and T = 273 K are the STP (Standard Temperature and Pressure) conditions.

It is possible to compute the amount of dry gas at STP as follows:

V1 = nRT/P

where V1 is the dry gas volume at STP.

n/V = P/RT

The moles in a gas per unit volume are denoted by the ratio n/V.

In the case of dry gas, n/V is equal to (760 mmHg)/(62.36 L.mmHg-1.K⁻¹x 273 K) = 0.0282 mol/L.

The formula is (21 mmHg)/(62.36 L.mmHg-1.K⁻¹ x 296 K) = 0.00089 mol/L for water vapour.

The following formula can be used to determine the total number of moles per unit volume of gas at 745 mmHg and 296 K:

n/V = P/RT

n/V for total gas is equal to (0.0257 mol/L)/745 mmHg/(62.36 L.mmHg-1.K⁻¹ x 296 K).

The following formula can be used to get the number of moles per unit volume of dry gas at 745 mmHg and 296 K:

n/V for dry gas at 745 mmHg and 296 K equals (Ptotal - Pvapour)/PSTP for dry gas at STP.

where P vapour is the water vapour pressure at 23 degrees Celsius, which is 21 mmHg.

(0.0282 mol/L) x (745 - 21)/760 equals n/V for dry gas at 745 mmHg and 296 K.

= 0.0265 mol/L

The following formula can be used to get the volume of dry gas at 745 mmHg and 296 K:

V2 = nRT/P

where V2 is the dry gas volume at 745 mmHg and 296 °C.

V2 is equal to 0.0265 mol/L times 62.36 L.mmHg-1.K-1 x 296 K and 745 mmHg.

= **0.87 L**

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.

Answer:

Instantly Convert Kilograms (kg) to Pounds (lb av) and Many More Mass Conversions Online. Kilograms ... 1 Kilogram: The kilogram is defined as being equal to the mass of the ... 30 Kilograms to Pounds = 66.1387, 1,000 Kilograms to Pounds = 2204.6226 ... Kilograms to Newtons · Kilograms to Grams · Kilograms to Tonnes ...

Explanation:

Answer:

Liquid - A.

Solid - C.

Gas - D.

Plasma - B.

Explanation:

A liquid sinks to the bottom of a container, a solid is solid and has a fixed shape and density, a gas takes up an entire object (air for example), and plasma is left with B.

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Complete Question

What is the most dense a marble(2.56), quartz (2.64), or diamond (3.52).

Answer:

Diamond with a density of 3.52

Explanation:

When we say an object is dense, this means how heavy a substance or object can be.

Density can be defined as the mass per unit volume of an object of an object or a substance.

In the above question, we were given 3 substances or compounds with their respective densities:

marble(2.56)

quartz (2.64)

diamond (3.52).

We are asked to find the one that is most dense. This means we are to find the one with the highest density.

From amongst the three compounds, the most dense is Diamond with a density of 3.52.

The mid Atlantic ridge is the most famous Mid ocean ridge. It is also called the spreading center or a divergent plate boundary.

The submerged hills and mountains are called the Mid - ocean ridge. They contain peaks which rise above sea levels. It is known as an underwater mountain range produced by plate tectonics.

The mountain ranges can have peaks as high as 2500 m and some can even reach above the ocean's surface. The majority of the volcanic eruption on the planet occurs along the mid-ocean ridge.

Thus Mid-ocean ridge is the place where crust is born.

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Answer:

A single distillation cycle is enough to separate the mixture. ... Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.

Explanation:

Gas is a state of matter that have loosely moving particles. The closeness of the gas and intermolecular forces deviates from the ideal equation.

The gas consists of particles that may be too close resulting in lowering the speed that let intermolecular forces become significant at low-temperature and high pressure.

The intermolecular forces present in the gases differs from obeying the ideal gas conditions and contradicting the ideal gas rule of no collision and inter-molecular attraction with other gases.

Therefore, option A. intermolecular forces and option C. closeness of the particles are the reasons for the deviation.

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Answer:

answer in  picture

Explanation:

Answer:

Phosphorus sesquisulfide, free from yellow and white phosphorus appears as a yellow crystalline solid. Easily ignited by friction. Forms sulfur dioxide and phosphorus pentaoxide during combustion. Reacts with water to form phosphoric acid, a corrosive material. Used to make matches and in the manufacture of other chemicals.

Explanation:

Answer:

As the Bohr's fixed orbit gives precise information about the radial position and momentum of the orbit, it is against the Heisenberg uncertainty principle. Thus it is inferred that the Heisenberg uncertainty principle goes and the concept Bohr's fixed Orbit are opposite to each other.

Explanation:

The process by which carbon moves from inorganic to organic compounds and back is called the carbon cycle.

The carbon cycle demonstrates the movement of carbon in elemental and collective states on earth. Diamond and graphite are the elemental constitutions of carbon and in a combined state, it is set up as carbonates in minerals and as carbon dioxide gas in the atmosphere. Carbon present in the atmosphere is sponged by plants for photosynthesis. These plants are then eaten up by animals and carbon gets bioaccumulated into their bodies. These animals and plants ultimately die, and upon decomposing, carbon is dismissed back into the atmosphere.

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Answer:

First we isolate y by doing - 3

-y = 10

Explanation:

-10 since 3- (-10) is actually 3 + 10 which is 13

The equation that has been following the law of conservation has been \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\). Thus, option D is correct.

The law of conservation of mass states that in a chemical equation, the atoms of reactants and atoms of products for each elements are equal.

In the given reactions,

A. \(\rm H_2\;+\;Cl_2\;\rightarrow\;HCl\)

The equation has 2 atoms of hydrogen and chlorine at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

B. \(\rm H_2\;+\;O_2\;\rightarrow\;H_2O\)

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

C. \(\rm H_2\;+\;O_2\;\rightarrow\;2\;H_2O\)

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 2 atoms of oxygen and 4 atoms of hydrogen on product side. Since, the equation has imbalanced hydrogen it does not follow the law of conservation.

D. \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\)

The reaction has 2 atoms of hydrogen and chlorine at reactant side, and 2 atom of each on product side. Thus, the equation does follow the law of conservation.

The equation that has been following the law of conservation has been \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\). Thus, option D is correct.

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Answer: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6

Explanation:

Answer:

Energy transfer by direct contact is conduction.

Explanation:

Conduction is the process of heat or electricity being transferred through a solid material by the movement of molecules. When two objects are in direct contact with each other, heat can be transferred from one object to the other through conduction. This is because the molecules in the hotter object have more energy, and they transfer some of their energy to the molecules in the cooler object through collisions and interactions.

Energy transfer as electromagnetic waves, energy transfer by currents of moving liquid or gas, and energy transfer from a reaction system to its surroundings are all examples of different methods of energy transfer, but they are not conduction.

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Energy transfer by direct contact is conduction. Therefore, option B is correct.

Conduction is a mode of energy transfer that occurs through direct contact between objects or substances. When objects or substances with different temperatures come into contact, the hotter object transfers thermal energy to the colder object through conduction.

Conduction refers to the transfer of heat or thermal energy from a region of higher temperature to a region of lower temperature. This transfer occurs when the atoms or molecules of the hotter object collide with those of the colder object, transferring kinetic energy and increasing the motion of the colder object's particles.

As a result, the temperature of the colder object increases, while the temperature of the hotter object decreases until both reach thermal equilibrium.

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Answer:

9 moles

Explanation:

To find out how many moles of compound B are needed to have the same mass as 6.0 mol of compound A, we need to use the molar mass of each compound and set up a proportion:

Moles of A / Molar mass of A = Moles of B / Molar mass of B

We know that the molar mass of compound A is 20 g/mol and that we have 6.0 mol of it, so:

6.0 mol A / 20 g/mol A = Moles of B / 30 g/mol B

Simplifying this equation:

0.3 mol A = Moles of B / 30

Multiplying both sides by 30:

9 mol B = 0.3 mol A

So, we need 9 moles of compound B to have the same mass as 6.0 mol of compound A.

Answer:

Protons

Explanation:

That would be protons, who have a positive charge to an electron’s negative charge. Their attraction is what keeps an electron inside the atom.

The boiling point of bromine (Br₂) is approximately 59°C. This value is derived from the thermodynamic information provided in the ALEKS Data tab.

To calculate the boiling point of bromine, we can use the thermodynamic data provided in the ALEKS Data tab. The boiling point of a substance is the temperature at which its vapor pressure equals the atmospheric pressure. Bromine's vapor pressure can be determined using the Clausius-Clapeyron equation, which relates the vapor pressure of a substance to its temperature and enthalpy of vaporization. Using the data tab, we can find the enthalpy of vaporization for bromine (ΔHvap = 29.54 kJ/mol) and use it in the equation along with the known vapor pressure and atmospheric pressure to calculate the boiling point. After solving for the temperature, rounding the answer to the nearest degree gives us the boiling point of bromine as 59°C.

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(a)The parameters of the binomial distribution are the number of trials (n = 8) and the probability of success (p = 0.8). (b) The exact value of P(X ≤ 5) is approximately 0.04101368. (c)If the p-value is very small (below a predetermined significance level), we may reject the null hypothesis and question the claim. If the p-value is not small, we may fail to reject the null hypothesis and consider the claim plausible.

a) The probability distribution that can be used to model the random variable X is the binomial distribution, as we have a fixed number of trials (8 patients) and each patient has a binary outcome (symptoms relieved or not relieved). The parameters of the binomial distribution are the number of trials (n = 8) and the probability of success (p = 0.8).

b) To find P(X ≤ 5), we need to calculate the cumulative probability of X up to 5 using the binomial distribution. We can use the binomial cumulative distribution function (CDF) or calculate it manually by summing the individual probabilities.

Using the binomial CDF:

P(X ≤ 5) = Σ(i = 0 to 5) [8C(i) × (0.8i)  (0.2(8-i))]

Calculating it manually:

P(X ≤ 5) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)

Using the binomial probability formula:

P(X = k) = 8C(k) × (0.8k) × (0.2(8-k))

Therefore, the exact value of P(X ≤ 5) is approximately 0.04101368.

c) To assess whether we should believe the claim of United Medicine, Inc., we can perform a hypothesis test using statistical methods. The claim states that 80% of all patients experience symptom relief. In our sample of 8 patients, if we observed 3 patients with symptom relief, we can compare this to the expected proportion of success (p = 0.8) using hypothesis testing.

We can set up a null hypothesis (H0) that the true proportion of patients experiencing symptom relief is equal to 80% (p = 0.8) and an alternative hypothesis (H1) that the true proportion is different from 80% (p ≠ 0.8). We can then perform a statistical test, such as a chi-square test or a z-test for proportions, to determine the likelihood of observing 3 out of 8 patients with symptom relief if the true proportion is indeed 80%.

Based on the results of the statistical test, we can assess the evidence against the null hypothesis and make an informed decision about whether to believe the claim of United Medicine, Inc. If the p-value is very small (below a predetermined significance level), we may reject the null hypothesis and question the claim. If the p-value is not small, we may fail to reject the null hypothesis and consider the claim plausible.

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Answer:

e) 5

Explanation:

Because it's H

The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

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The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

In anaerobic respiration, alcohol fermentation can occur in the absence of oxygen, glucose is broken down into pyruvate, which is then converted into ethanol and carbon dioxide by a process called alcoholic fermentation.

The overall chemical equation for alcohol fermentation is:

Glucose → 2 ethanol + 2 carbon dioxide + 2 ATP

During alcoholic fermentation, the pyruvate produced in glycolysis is converted into acetaldehyde by the enzyme pyruvate decarboxylase, which then reacts with NADH to form ethanol and NAD+. The carbon dioxide released during this process is a byproduct that is typically released into the air.

Overall, alcohol fermentation is a type of anaerobic respiration that allows organisms like yeast to produce energy in the absence of oxygen. It is also the process used in the production of alcoholic beverages like beer and wine.

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