A certain liquid has a normal freezing point of and a freezing point depression constant . A solution is prepared by dissolving some benzamide () in of . This solution freezes at . Calculate the mass of that was dissolved. Round your answer to significant digits.

The order from smallest to largest atomic radius is

Be < Mg < Ca < Ba, For Mg and Na, Mg has a smaller atomic radius than Na, so the correct answer is "Mg, Na".

The atomic radius generally increases down a group and decreases across a period in the periodic table. Going from Be to Ba, we are going down Group 2, which means the atomic radius increases. However, within a period, going from left to right, the atomic radius decreases.

The trend in atomic radius across a period is primarily due to increasing nuclear charge as you move from left to right, which attracts the electrons in the outermost energy level closer to the nucleus. This results in a smaller atomic radius.

On the other hand, down a group, the number of energy levels or electron shells increases, which shields the outermost electrons from the attractive force of the nucleus. As a result, the electrons can occupy energy levels farther from the nucleus, leading to an increase in atomic radius.

learn more about atomic radius here:

https://brainly.com/question/18095927

#SPJ11

Answer

To convert μg/l to mol/kg?

Step 1: from the mass in grams, find the number of moles by diving the mass by its molar mass

Step 2: To go from L to kg, take the volume given multiply it by density in kg/L

Answer:

Specular reflection is correct answer by my views

hope it helps you

Answer:

0.35M NaOH and 0.0375M HCl.

Explanation:

NaOH reacts with HCl as follows:

NaOH + HCl → NaCl + H2O

Where 1 mole of NaOH reacts per mole of HCl

To solve the first question we must find the moles of HCl that reacted = Moles NaOH in the unknown. With the moles and the volume we can find its molar concentration:

Moles HCl = Moles NaOH:

0.0350L * (0.25mol / L) = 0.00875 moles NaOH

In 25.0mL = 0.0250L:

0.00875 moles NaOH / 0.0250L =

0.35M NaOH

For the second question, the moles of NaOH = moles HCl. With the 200mL = 0.200L the molarity is:

Moles NaOH = Moles HCl:

0.015L * (0.5mol / L) = 0.0075 moles HCl / 0.200L =

0.0375M HCl

Answer:

642.8g

Explanation:

NaCl has a molar mass of 58.44g/mol, which means one mole of NaCl has a mass of 58.44g.

11 moles of NaCl will have a mass of 642.8g.

11 mol NaCl x 58.44g = 642.8g

The relationship between pressure and temperature of a fixed amount of gas in a rigid container is called Charles’ Law.

According to Charles’ Law, for a given mass of gas at a constant volume, the volume of the gas varies directly with the temperature. It can be represented by the formula :V/T = constant where, V = volume of the gas T = temperature of the gas (in Kelvin)constant = proportionality constant Since pressure, volume, and temperature of the gas are interdependent, we can write:

PV/T = constant. We can use this formula to solve the problem. We know that the volume of the gas is constant. So, we can write:

P1/T1 = P2/T2 where, P1 = 3.20 atm (pressure at 300 K)T1 = 300 K (temperature at 3.20 atm)T2 = 290 K (temperature at unknown pressure)

Now, we can calculate P2 (pressure at 290 K) as:

P2 = P1 × (T2/T1) = 3.20 atm × (290 K/300 K) = 3.09 atmAnswer:3.09 atm

When the temperature of a fixed amount of gas is increased, its volume also increases. Similarly, when the temperature is decreased, the volume also decreases. This relationship between the volume of a gas and its temperature at a constant pressure is called Charles’ Law. It can be stated as:

V/T = constant, where V is the volume of the gas and T is its temperature in Kelvin. The proportionality constant in the above equation is the number of moles of the gas multiplied by the gas constant (R).

Mathematically, we can represent this relationship between pressure, volume, and temperature of a gas as: PV/T = constant.

When the volume of the gas is constant, the above equation becomes:

P1/T1 = P2/T2where P1 and T1 are the initial pressure and temperature of the gas, and P2 and T2 are the new pressure and temperature of the gas, respectively.

Using this equation, we can calculate the pressure of the gas at a new temperature, provided we know its initial pressure and temperature, and the new temperature.

Therefore, the pressure of the gas at 290 K will be 3.09 atm.

To know more about Charles’ Law visit:

brainly.com/question/27820267

#SPJ11

The potency of acetylcholine after replacing the acetyl group with propionyl or butyrly group decreases.

Its is a organic chemical that function in the brain and body fofmany types of animal ,and humans also as neurotransmitter.

It act as a messenger , that plays a very important role in the central and peripheral nervous system.

The acetylcholine is important for autonomic body functions, muscle control and memory , learning and attention.

Lack of acetycholine cause no contraction in muscles.

Excess of acetylcholine causes cramps , muscular weakness blurry vision, diarrhea etc.

Propionyl or butyryl  is higher homologus group than acetyl , this is the reason the potency will decreases or reduces its activity.

To learn more about acetylcholine here

https://brainly.com/question/28147280

#SPJ4

The NaCl in an ionic compound. In this sodium's one valence electron is transferred over to the chlorine. The chlorine is a non metal and have tendency to accept electrons and chlorine needs one electron.

The metal have tendency to donate the electrons and the non metal have tendency to to accept the electrons. The ionic bond is form between the metal and the non metal by the complete transfer of the electron .

Thus, the sodium donate its electron and form the Na⁺ and the chlorine accept the electron and form the Cl⁻. The ionic bond is form between the the positive charge and the negative charge.

To learn more about electrons here

https://brainly.com/question/4537482

#SPJ4

The final electron acceptor in aerobic respiration is oxygen (O2).The electron transport chain (ETC) in cellular respiration relies on a final electron acceptor to help oxygen get reduced into water. This is why oxygen is considered the final electron acceptor in cellular respiration.

During cellular respiration, glucose is broken down into pyruvate. Pyruvate is then transformed into acetyl CoA and enters the citric acid cycle, where it is oxidized and generates ATP, NADH, and FADH2. The final stage of aerobic respiration involves the electron transport chain, in which electrons from NADH and FADH2 are passed through a series of proteins and coenzymes in the inner mitochondrial membrane, ultimately reducing oxygen to form water.

This process is known as oxidative phosphorylation.In conclusion, the final electron acceptor in aerobic respiration is oxygen (O2), and carbon dioxide is generated in the link reaction (pyruvate oxidation) and the citric acid cycle.

To know more about cellular respiration visit:-

https://brainly.com/question/32872970

#SPJ11

Answer:

True.

Explanation:

Answer:

Light as a wave: Light can be described (modeled) as an electromagnetic wave. In this model, a changing electric field creates a changing magnetic field. This changing magnetic field then creates a changing electric field and BOOM - you have light. ... So, Maxwell's equations do say that light is a wave.

Explanation:

Hope this helps

Answer:

Light as a wave: Light can be described (modeled) as an electromagnetic wave. In this model, a changing electric field creates a changing magnetic field. This changing magnetic field then creates a changing electric field and BOOM - you have light. ... So, Maxwell's equations do say that light is a wave.

Explanation:

Credit for 2021FOLLOWme

Choose the best option for the immediate precursor to the target molecule: The correct answer is "p1d2." The formation of 2-ethoxy-2-methylpropane involves the addition of ethoxide ions to 2-methylpropene in the first step, resulting in the formation of an alkoxide ion.

The resulting alkoxide ion is then protonated to form the final product, 2-ethoxy-2-methylpropane. The most acceptable immediate precursor for this reaction is p1d2. This mechanism involves the use of ethyl alcohol (ethanol) to convert 2-methylpropene to 2-bromo-2-methylpropane, which is the immediate precursor to the target molecule. The reaction takes place via an S N 1 reaction mechanism.

The formation of 2-bromo-2-methylpropane requires the use of hydrobromic acid (HBr) in the presence of peroxide. The addition of ethoxide ions to 2-methylpropene is the first step in the synthesis of 2-ethoxy-2-methylpropane. The resulting alkoxide ion is protonated to produce 2-ethoxy-2-methylpropane. Ethyl alcohol (ethanol) is used in this process, and the reaction occurs through an S N 1 mechanism. 2-bromo-2-methylpropane, a precursor to 2-ethoxy-2-methylpropane, is produced using hydrobromic acid (HBr) and peroxide. The reaction takes place through a Markovnikov addition mechanism. Therefore, p1d2 is the best option for the immediate precursor to the target molecule, while p2d3 is the best option for the precursor needed to make the alkyl bromide.

To know more about molecule visit:

https://brainly.com/question/32298217

#SPJ11

Neil Bohr used the fluorescent screen and an alpha particle detector to study the structure of an atom.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

The atom as a whole is neutral and stable due to presence of oppositely charged particles.

Learn more about atom,here:

https://brainly.com/question/13654549

#SPJ1

Answer: static charge

Explanation:

Answer:

Explanation:

static load, also called the holding load, is the force that will be applied to the linear actuator when it is not in motion.

If the gauge pressure is 100 kPa, then the absolute pressure will be 201.3 kPa.

Gauge pressure is the pressure measured relative to atmospheric pressure. Absolute pressure is the total pressure that is being exerted on a given surface, including both atmospheric pressure and any additional pressure from a source, such as a fluid or gas. It is always positive and is measured relative to a perfect vacuum, which has an absolute pressure of 0 kPa.

To determine the absolute pressure when the gauge pressure is known, we need to add the gauge pressure to the atmospheric pressure. The standard atmospheric pressure at sea level is around 101.3 kPa.

So, if the gauge pressure is 100 kPa, we can find the absolute pressure by adding the atmospheric pressure of 101.3 kPa to the gauge pressure.

Absolute Pressure = Gauge Pressure + Atmospheric Pressure = 100 kPa + 101.3 kPa = 201.3 kPa

Therefore, the absolute pressure in this scenario is 201.3 kPa.

It's important to note that the units of gauge pressure and absolute pressure are different. Gauge pressure is typically measured in kilopascals (kPa), pounds per square inch (psi), or atmospheres (atm), while absolute pressure is measured in units such as kilopascals absolute (kPaA) or pounds per square inch absolute (psia).

In summary, absolute pressure is the total pressure that is being exerted on a given surface, including atmospheric pressure and any additional pressure from a source.

For more such questions on Absolute Pressure.

https://brainly.com/question/12937139#

#SPJ11

Firstly till 5mL temperature remains constant then suddenly rise in temperature and then again constant.

What is fractional distillation?

Fractional distillation is a type of distillation process that separates a mixture of liquids into its individual components (or fractions) based on their boiling points. This process is commonly used in the petrochemical and oil refining industries to separate large volumes of crude oil into more useful fractions. The process takes advantage of the differences in boiling points of the various components of the mixture, which can vary widely. The process begins by heating the mixture to a temperature where at least one of the components will vaporize. The vapor is then collected and condensed back into the liquid phase. This process is repeated until all of the desired components are collected. This method of separation is extremely efficient and cost-effective compared to other methods, such as liquid-liquid extraction or chromatography.

To see the graph please refer attached file

To learn more about fractional distillation

https://brainly.com/question/790490

#SPJ4

Answer:

three atoms = 1 water molecule

3 × 6 = 18 atoms

................

At pH 1.0, methionine will exist in its protonated form with a positive charge on the amino group and a negative charge on the carboxyl group.

The structure of methionine at pH 1.0 can be drawn as follows:

H3N+CH2CH2SCH2CH(NH2)COO-

Note that the sulfur atom in methionine also has a lone pair of electrons, which can participate in hydrogen bonding or metal ion binding in proteins.
At pH 1.0, methionine, a neutral, nonpolar amino acid, would be in its fully protonated form. In this form, the amino group (NH3+) would carry a positive charge, and the carboxyl group (COOH) would remain as a neutral acid. The structure would look as follows:

H3N+ - CH - COOH
         |
         CH2
         |
     S - CH3

To learn more about methionine visit;

https://brainly.com/question/2329477

#SPJ11

Answer:

C- transforemed or changed

Explanation:

matter can be changed by application of heat or cold

Answer:

true

Explanation:

The foreign substance responsible for causing an allergic reaction is called an allergen.

The exaggerated reaction of our body’s immune system to certain foreign substances is known as an allergy.

The symptoms of allergy are sneezing, watery eyes, running nose, and difficulty in breathing which occur due to the release of certain chemicals like histamine and serotonin in our body.

The foreign substance that causes allergy is called an allergen.

Common examples of the allergens are pollen grains of certain plants, animal dander, and food items like peanuts, mushrooms etc.

To control the symptoms of allergy, drugs like antihistamines and steroids are used.

To know more about "immune system", refer to the link given below:

https://brainly.com/question/1375072?referrer=searchResults

#SPJ4

To determine the grams of CO2 formed when 7.50 g of C2H5OH (ethanol) is produced, we need to consider the balanced chemical equation for the combustion of ethanol:

C2H5OH + 3O2 -> 2CO2 + 3H2O

From the balanced equation, we can see that for every 1 mole of C2H5OH, 2 moles of CO2 are produced. We can use the molar mass of ethanol and the molar mass of CO2 to calculate the grams of CO2 produced.

The molar mass of C2H5OH is calculated as follows:

(2 x molar mass of C) + (6 x molar mass of H) + molar mass of O

(2 x 12.01 g/mol) + (6 x 1.008 g/mol) + 16.00 g/mol = 46.07 g/mol

Now we can set up a proportion to calculate the grams of CO2:

(7.50 g C2H5OH) / (46.07 g/mol C2H5OH) = (x g CO2) / (44.01 g/mol CO2)

Cross-multiplying the proportion:

7.50 g C2H5OH * (44.01 g/mol CO2) = 46.07 g/mol C2H5OH * x g CO2

Simplifying the expression:

x = (7.50 g C2H5OH * 44.01 g/mol CO2) / 46.07 g/mol C2H5OH

Calculating the result:

x ≈ 7.17 g CO2

Therefore, approximately 7.17 grams of CO2 are formed when 7.50 grams of C2H5OH are produced.

Answer:

$500

Explanation:

G00gle.

Following represents the number of Molecules of the type indicated is present as a reactant or product of the chemical reaction shown is the coefficient of the species

The number of atoms, molecules, or formula units of a reactant or product in a balanced chemical equation is the coefficient of that species then the mole ratio of two substances in a chemical reaction is the ratio of their coefficients in the balanced chemical equation and the this numbers are called as coefficient and they tell how many of each molecule are participate in the reaction

Know more about chemical reaction

https://brainly.com/question/17156059

#SPJ1

Answer:

300 0.24

600 0.46

900 0.70

1200 0.95

1500 1.20

Explanation: correct on behavior gasses tutorial

To furnish 1.5 mol of carbon atoms from sucrose, you would need approximately 294.3 mL of aqueous 40% sucrose solution.

The molar mass of sucrose (C12H22O11) can be calculated as follows:

Molar mass of C12H22O11 = (12 * 12.01 g/mol) + (22 * 1.01 g/mol) + (11 * 16.00 g/mol)

                      = 144.12 g/mol + 22.22 g/mol + 176.00 g/mol

                      = 342.34 g/mol

Since each mole of sucrose contains 12 moles of carbon atoms, the molar mass of carbon is:

Molar mass of carbon = (12 * 12.01 g/mol)

                   = 144.12 g/mol

To calculate the mass of carbon atoms needed to furnish 1.5 moles, we can use the following formula:

Mass of carbon = (1.5 mol) * (144.12 g/mol)

             = 216.18 g

Now, we can calculate the volume of the aqueous 40% sucrose solution using its density:

Volume = Mass / Density

      = 216.18 g / 0.911 g/mL

      ≈ 237.34 mL

However, the 40% sucrose solution is not pure sucrose. We need to consider the actual amount of sucrose in the solution. A 40% sucrose solution means it contains 40 g of sucrose per 100 mL of solution.

Therefore, the volume of the aqueous 40% sucrose solution required would be:

Volume = (237.34 mL * 100 mL) / 40 g

      ≈ 593.35 mL

To furnish 1.5 mol of carbon atoms from sucrose, you would need approximately 593.35 mL of aqueous 40% sucrose solution.

To know more about atoms visit :

https://brainly.in/question/13150186

#SPJ11

It is important to ensure that the probe is inserted into the thickest part of the meat for an accurate reading of the internal temperature.

To check the internal temperature of a beef roast, you should use a Type K thermocouple probe. This type of thermocouple is made from nickel-chromium and nickel-alumel materials, providing accurate and reliable temperature measurements. It's suitable for a wide range of temperatures, including the typical cooking range for beef roasts.

To use it, insert the probe into the thickest part of the roast, ensuring it doesn't touch any bones, to get an accurate reading of the internal temperature. To check the internal temperature of a beef roast, a type K thermocouple probe is recommended. This type of probe is suitable for measuring high temperatures and can be inserted directly into the meat for an accurate reading.

Learn more about Probe:

brainly.com/question/1451854

#SPJ11