what has 26 protons, 28 neutrons, and 23 electrons

Answer:

The molar mass is 97.99 g

Answer:

Minimum volume of water = 0.28 ml

Mass remaining in solution at 25°C = 0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.044 g

Explanation:

solubility of sodium benzoate in boiling water (100°C) = 1 g/1.4 mL

minimum volume of boiling water required to dissolve 0.200 g of sodium benzoate = mass / solubility

minimum volume of water = 0.200 g / (1 g / 1.4 mL)

minimum volume of water = 0.28 ml

Solubility of sodium benzoate at 25°C = 1 g / 1.8 mL

Mass in solution = solubility x volume

Mass in solution = (1 g / 1.8 mL) x 0.28 mL

Mass remaining in solution at 25°C = 0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.200 g -

0.156 g

Maximum mass of sodium benzoate that can be recovered = 0.044 g

Although sodium and phosphorus are both found in the same period of the periodic table, the nature of their oxides is different. Although P2O5 is acidic, Na2O is basic.

Metal oxides are basic, whereas non-metal oxides are acidic. The metallic character of the elements lessens as you move from left to right over time, while the non-metallic character grows.

Since the oxides in an element's higher oxidation state are more acidic than those in its lower oxidation state, dinitrogen pentoxide is the most acidic oxide compared to nitrogen dioxide and nitrogen tetraoxide.

To know more about acidic visit:-

https://brainly.com/question/14072179

#SPJ1

Explanation:

Oxidation state of Nitrogen in N2O5 is +5

The density of 200 cm^3 of pure water is 200 g / 200 cm^3 = 1 g/cm^3, and  is the same as the density of 1 cm^3 of water.

b. A Corn syrup on top, water in middle, and olive oil on bottom because corn syrup has the highest density of 1.4 g/cm^3, followed by water with a density of 1 g/cm^3, and olive oil with a density of 0.85 g/cm^3.

So option A is correct.

Density is described as the substance's mass per unit of volume.

We were able to determine which substance will stay in its relative position using Archimedes' principle which states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces.

Learn more about density at: https://brainly.com/question/1354972

#SPJ1

\(\\ \tt\hookrightarrow PV=nRT\)

\(\\ \tt\hookrightarrow V=\dfrac{nRT}{P}\)

\(\\ \tt\hookrightarrow V=\dfrac{2(8.314)(300)}{2}\)

\(\\ \tt\hookrightarrow V=8.314(300)\)

\(\\ \tt\hookrightarrow V=2494.2mL\)

\(\\ \tt\hookrightarrow V=24.94dm^3\)

2 moles of a gas have a pressure of 2 atm at a temperature of 300 K then volume will be 24.94 \(dm^{3}\).

The mole would be a SI unit that is used to quantify the quantity of any material. Mol is just the shorthand for "mole."

The force among all gas particle/wall interactions distributed mostly by the surface area of the wall would be the definition of pressure (P). Another of the fundamental quantifiable variables of this stage of matter, pressure, would be a property shared by all gases.

Calculation of volume.

Given data:

Number of moles = 2 mol

pressure = 2 atm

Temperature = 300K

Volume = ?

Volume can be calculated by using the formula:

PV = nRT

where, P is pressure, T is temperature.

Now, put the value of given data in above equation.

V = nRT / P

V = 2 × 8.31× 300/ 2

V = 2494.2ml

V = 24.94 \(dm^{3}\)

Therefore, the volume will be 24.94 \(dm^{3}\)

To know more about pressure

https://brainly.com/question/12971272

#SPJ2

Answer:

1.) zinc and aluminum

2.)

a.) The old coating was made of tin.

b.) Aluminum would be a good choice for repairing the fracture.

Answer:

To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.

Explanation:

Answer:

True

Explanation:

it does! because of the angle between Saturn and Earth and the Sun.

Hope this helps plz hit the crown :D

The conclusion that can be drawn about lupus is that: Lupus can affect almost every system of the body. Option D. is the correct answer.

What is Lupus (SLE)?

This refers to a disease that happens when your body's immune system attacks your own tissues and organs (autoimmune disease).

Lupus (SLE) can affect the following body parts: joints, skin, kidneys, blood cells, brain, heart and lungs.

Symptoms differ from person to person but can include fatigue, joint pain, rash and fever. These can get worse from time to time (flare up) and then improve.

Lupus has no cure. Current treatments are based on improving quality of life by controlling symptoms and minimizing flare-ups. This starts with lifestyle modifications, including sun protection and diet. Also, disease management includes medication such as anti-inflammatories and steroids.

Learn more about Lupus on

https://brainly.com/question/28445821

#SPJ1

Answer:

The negative charges of the surface will be attracted to the positive ends of the water molecule

Explanation:

A water molecule is a polar molecule. This means that the two ends of a water molecule are oppositely charged with one end being positive and the other end being negative.

When the positive end of a water molecule encounters a surface as shown in the attachment, where positive and negative charges are evenly distributed at rest, with the negative charges free to move, the negative charges will be attracted to the positive end of the water molecule due to the principle of electrostatics which states that unlike charges attract, while like charges repel. This means that negative and positive charges are attracted to each other while positive and positive or negative and negative charges are repelled from each other. Therefore, the water molecule will adhere to the surface because of the attraction between opposite charges.

The unlike charges will attract as expected based on the laws of electrostatics.

According to the laws of electrostatics, like charges repel while unlike charges attract. We are told in the question that water is a polar molecule with a positive and a negative end.

If the positive end of water dipole approaches the negative charges on the surface, the unlike charges will attract as expected based on the laws of electrostatics.

Learn more: https://brainly.com/question/8646601

Answer:

1.10 g/L

Explanation:

Step 1: Calculate Henry's constant (k)

The solubility of a gas (C) is 0.890 g/L at a pressure (P) of 121 kPa. Solubility and pressure are related through Henry's law.

C = k × P

k = C / P

k = (0.890 g/L) / 121 kPa = 7.36 × 10⁻³ g/L.kPa

Step 2: Calculate the solubility of the gas if the pressure is increased to 150 kPa

We will use Henry's law.

C = k × P

C = (7.36 × 10⁻³ g/L.kPa) × 150 kPa = 1.10 g/L

Solubility of the gas, if the temperature is held constant and pressure is increased to 150 kPa from 121 kPa, is 1.10 g/L.

Henry's law of gas states at solubility (C) of the dissolved gas is directly proportional to the partial pressure (P) of the gas.

C ∝ P

C = kP, where

k = Henry's constant

Let first we calculate the Henry's constant, when the solubility of a gas is 0.890 g/L at a pressure of 121 kPa is:

k = (0.890 g/L) / (121 kPa)

k = 7.36 × 10⁻³ g/L.kPa

Now we calculate the solubility of the gas, if the pressure is increased to 150 kPa as:

C = (7.36 × 10⁻³ g/L.kPa) (150 kPa)

C = 1.10 g/L

Hence, required solubility is 1.10 g/L.

To know more about Henry's constant, visit the below link:

https://brainly.com/question/7007748

Answer:

1.30

Explanation:

The neutralization reaction involved in the titration is:

HClO₄(aq) + KOH(aq) → KClO₄(aq) + H₂O(l)

According to the chemical equation,

1 mol of HClO₄ reacts with 1 mol of KOH (1 equivalent of acid with 1 equivalent of base). The moles are calculated from the product of the molar concentration (M) and the volume in liters.

We have the following moles of acid (HClO₄):

40.0 mL x 1 L/1000 mL = 0.04 L 0.200 mol/L x 0.04 L = 8 x 10⁻³ moles HClO₄

Since HClO₄ is a strong acid (completely dissociated into H⁺ and ClO₄⁻ ions), the moles of HClO₄ are equal to the moles of H⁺.

Then, we can calculate the initial pH:[H⁺] = 0.200 M → pH = -log [H⁺] = -log (0.200) = 0.70

Now, we calculate the pH after the addition of KOH. Since KOH is a strong base, the concentration of KOH is equal to the concentration of OH⁻ ions.

a) 0.0 mLNo KOH is added, so the pH is the initial pH:

0.70

b) 80.0 mL KOH80.0 mL x 1 L/1000 mL = 0.08 L0.100 mol/L x 0.08 L = 8 x 10⁻³ moles KOH = 8 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 8 x 10⁻³ moles OH⁻ = 0The neutralization reaction is complete and there is no remaining H⁺ from the acid.

The concentration of H⁺ is equal to the concentration of H⁺ of water:

[H⁺] = 1 x 10⁻⁷ M → pH = -log [H⁺] = -log (1 x 10⁻⁷) = 7.0

c) 10.0 mL KOH10.0 mL x 1 L/1000 mL = 0.01 L0.100 mol/L x 0.01 L = 1 x 10⁻³ moles KOH = 1 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 1 x 10⁻³ moles OH⁻ = 7 x 10⁻³ moles H⁺

The total volume is:

V = 40.0 mL + 10.0 mL = 50 mL = 0.05 L[H⁺] = 7 x 10⁻³ moles/0.05 L = 0.14  → pH = -log [H⁺] = -log (0.14) = 0.85

d) 100.0 mL KOH100.0 mL x 1 L/1000 mL = 0.1 L0.100 mol/L x 0.1 L = 0.01 moles KOH = 1 x 10⁻² moles OH⁻

After neutralization we have:

1 x 10⁻² moles OH⁻ - 8 x 10⁻³ moles H⁺ = 2 x 10⁻³ moles OH⁻

The total volume is:

V = 40.0 mL + 100.0 mL = 140 mL = 0.14 L[OH⁻] = 2 x 10⁻³ moles/0.14 L = 0.014  → pOH = -log [OH⁻] = -log (0.014) = 1.84pH + pOH = 14 → pH = 14 - pOH = 14 - 1.84 = 12.15

e) 40.0 mL KOH40.0 mL x 1 L/1000 mL = 0.04 L0.100 mol/L x 0.04 L = 4 x 10⁻³ moles KOH = 4 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 4 x 10⁻³ moles OH⁻ = 4 x 10⁻³ moles H⁺

The total volume is:

V = 40.0 mL + 40.0 mL = 80.0 mL = 0.08 L[OH⁻] = 4 x 10⁻³ moles/0.08 L = 0.05 M  → pH = -log [H⁺] = -log (0.05)

= 1.30

above because its above

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, due to larger atomic size, francium has lower melting and boiling point than lithium.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Francium has lower melting and boiling point than lithium because of the larger atomic size, due to which  lattice energy becomes low.

Therefore, due to larger atomic size, francium has lower melting and boiling point than lithium.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ1

The excess reagent in the given reaction is Cl₂.

An excess reactant is a substance that is not wholly consumed or entirely reacted in a chemical reaction. It is also known as an excess reagent.

Let us consider the following reaction of the formation of sodium chloride.

2Na(s)+Cl₂(g) → 2NaCl(s)

Sodium metal reacts with diatomic chlorine gas. The above equation indicates that 2 moles of sodium will react with 1 mole of chlorine. If we have equivalent moles of sodium and chlorine,

Then sodium will be a limiting reactant, while chlorine will be an excess reactant.

Given,

ZrSiO₄ + 2Cl₂ → ZrCl₄ + SiO₂ + O₂

Cl₂ is the excess reagent.

Therefore, The excess reagent in the given reaction is Cl₂.

Learn more about excess reagent, here:

https://brainly.com/question/28100156

#SPJ1

The following in the scientific method after the hypothesis is hypothesis testing which is carried out by experimental and or observation procedures.

The process of the scientific method involves a series of well-detailed steps to collect scientific empirical evidence, which is characterized to have data that can be tested by experimentation or observation.

The process of scientific method starts with the observation of the natural world, which leads us to raise a question that must be answered by a plausible explanation called a hypothesis. Finally, we can prove those hypotheses by using experiments to collect info and results.

Therefore, with this data, we can see that the process of the scientific method involve the application of experimentation and or observational procedures to test hypothesis and this confirm or reject their assumptions.

Learn more about the process of the scientific method here:

https://brainly.com/question/16319457

#SPJ1

Answer:

\(c=0.127\ J/g^{\circ} C\)

Explanation:

Given that,

Mass of the sample, m = 275 g

It required 10.75 kJ of heat to change its temperature from 21.2 °C to its melting temperature, 327.5 °C.

We need to find the specific heat of the metal. The heat required by a metal sample is given by :

\(Q=mc\Delta T\)

c is specific heat of the metal

\(c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{10.75\times 10^3\ J}{275\times (327.5 -21.2)}\\\\=0.127\ J/g^{\circ} C\)

So, the specific heat of metal is \(0.127\ J/g^{\circ} C\).

4.58 is the pH of a buffer that contains 0.15 M \(CH_3COOH\) and 0.10 M \(NaCH_3COO\).

Potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution.

Given data:

Ka = 1.8 X 10⁻⁵.

pKa = -logKa.

pKa = -log(1.8 X 10⁻⁵) = 4.75.

Henderson–Hasselbalch equation:

pH = pKa + log(\(\frac{CH_3COOH}{NaCH_3COO}\)).

pH = 4.75 + log(0.15 M /0.10 M).

pH = 4.75 - 0.17

pH = 4.58.

Hence, 4.58 is the pH of a buffer that contains 0.15 M \(CH_3COOH\) and 0.10 M \(NaCH_3COO\).

Learn more about the pH here:

https://brainly.com/question/10052686

#SPJ1

In an ecosystem, the  impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Learn more about ecosystem,here:

https://brainly.com/question/1673533

#SPJ9

​

Ribosomes are attached to the membrane of the ER, making it “rough.” The RER is also attached to the nuclear envelope that surrounds the nucleus. This direct connection between the perinuclear space and the lumen of the ER allows for the movement of molecules through both membranes.Answer:

Explanation:

TRUST

Answer:

a

Explanation:

Na, or sodium, is the right response. Among the listed elements, sodium has the lowest IE1 value. The energy needed to remove one electron from a neutral atom when it is in the gaseous form is known as the first ionisation energy (IE1).

A soft, silvery-white, highly reactive metal that is a member of the periodic table's alkali metal family is sodium (Na). Its atomic mass is 22.99 and it has an atomic number of 11. Sodium is a crucial element used in many processes, such as making alloys, chemicals, and electrical parts. It is a frequent component of table salt (NaCl) and other nutritional sources and is also a necessary element for living things. In the human body, sodium regulates fluid balance, nerve transmission, and muscle contraction. However, consuming too much salt has been related to a number of illnesses, such as high blood pressure and cardiovascular disease.

Learn more about Na here:

https://brainly.com/question/24808943

#SPJ4

Answer:

carbon dioxide

Explanation:

An example of a compound from the given choices is carbon dioxide.

A compound is any substance composed of two or more atoms /elements joined together in a definite grouping .

Reactions that can be used to synthesize an aldehyde as a reaction product are:

The other two options (B and E) do not result in the synthesis of an aldehyde as a reaction product.

Correct answer: letters A, C and D.

Extending the explanation of the above reactions, the reduction of esters using DIBAL-H involves the addition of a hydride to the carboxylate, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.

The hydroboration-oxidation of a terminal alkyne involves the addition of a borane to the alkyne, resulting in the formation of a boronate ester which is then oxidized to a ketone. The reduction of carboxylic acids using LiAlH4 involves the addition of a hydride to the carboxyl group, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.

Learn more about chemical reactions

https://brainly.com/question/11231920

#SPJ4

ANSWER: From experience and observation, the pathogen that responds more faster to treatments are PARASITES.

This is because, our body are already used to parasite, as they feed and mostly live inside our body. Parasites becomes harmful to our body, when it is allowed to be much in the body, thereby weakening the immune system of the body. Intake of vaccination reduces the number of parasites in the body, which gives the immune system the chance of recovering and protecting the body.

Parasite does not replicate more faster like viruses and other pathogens. These makes it more easier for treatment to work more faster. They are also easily killed by taking the proper treatment, and the rate of their replications are very slow when compared to the rate of their death when vaccinated.

Some example disease caused by parasites are:

1) Giardiasis

2) Trichomoniasis

3) Malaria

4) Toxoplasmosis

5) Intestinal worms

6) Pubic lice

All this disease above responds very fast to medical treatment, unless when they is complications, which are mostly when the parasite has been allowed to cause more harm and replicate much in the body, without any treatment. This is why doctors advice patients that lives at the tropical regions to periodically vaccinate themselves on parasitic infections.

The mass of water that can form is  0.946 g

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

2H2 + O2 -> 2H2O

From the equation, we can see that 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water. Therefore, the limiting reactant in this problem is oxygen, because it is present in a smaller quantity than hydrogen.

The number of moles of oxygen present in the container is given as 0.0263 mol. According to the stoichiometry of the balanced equation, this quantity of oxygen can react with 2 x 0.0263 = 0.0526 moles of hydrogen to form 2 x 0.0263 = 0.0526 moles of water.

The molar mass of water (H2O) is 18.015 g/mol. Therefore, the mass of water formed can be calculated as:

mass = number of moles x molar mass

mass = 0.0526 mol x 18.015 g/mol

mass = 0.946 g

Therefore, the mass of water that can form is approximately 0.946 g using stoichiometry of balanced equation'

Learn more about mixture below.

https://brainly.com/question/552187

#SPJ1

Answer:

Height and mass

Explanation:

The potential energy of a body is the energy due to the position of a body.

It is mathematically expressed as:

 Potential energy  = m g h

m is the mass of the body

g is the acceleration due to gravity

h is the height of the body

Acceleration due to gravity on the earth surface is a constant.

As mass and height of a body increases, the acceleration due to gravity will also increase.