You have one test tube which contains a white solid that is either agcl (s) or pbcl2 (s). select a reagent that will allow you to differentiate between the two chemical species. if the solid is agcl, what will happen when the reagent is added

Answer:

Light and Sound can be considered as non-matter.

Explanation:

Various forms of Energy like Heat, Sound, Light can be considered as non-matter

Answer:

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

Tetrahedral \(Cd^2^+\) complex: \([Cd(en)_2]^2^+\), Tetrahedral \(Zn^2^+\) complex: \([Zn(OH)_4]^2-\) is the correct formula for complex ions.

In coordination chemistry, complex ions are formed when a central metal ion is surrounded by ligands. In a tetrahedral \(Cd^2^+\) complex with ethylenediamine ligands (en), there are two ethylenediamine ligands coordinated to the central \(Cd^2^+\) ion, giving the complex formula \([Cd(en)_2]^2^+\).

For a tetrahedral \(Zn^2^+\) complex with hydroxide (OH-) ligands, there are four hydroxide ligands coordinated to the central \(Zn^2^+\) ion, resulting in the complex formula \([Zn(OH)_4]^2-\).

The geometries of these complexes are tetrahedral due to the arrangement of ligands around the central metal ion.

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There will be around 10 billion holes in the valence band, whereas the temperature and the applied electric fields all influence how the electrons travel within a semiconductor.

a. At room temperature, the number of holes in the valence band is roughly equal to the number of electrons in the conduction band in an inherent semiconductor like silicon (Si). This is because of the charge neutrality principle, according to which the material's overall charge is balanced. As a result, the valence band would also have roughly 10 billion holes.

b. Conduction band electrons do not constantly seek lower energy levels. A bandgap exists in an intrinsic semiconductor between the energy levels of the conduction band and the valence band. Compared to the valence band, electrons in the conduction band have greater energy levels, and they are not capable of moving spontaneously to lower energy levels. The temperature, the presence of impurities or defects, and the applied electric fields all influence how the electrons travel within a semiconductor.

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Complete Question:

At room temperature in a cubic centimeter of Si there will be about 10 billion electrons in the conduction band.

a. How many holes are in the valence band?

b. If electrons are constantly seeking lower value how are they governed ?

Answer:

ΔE  = 13.056 ev

Explanation:

Energy associated with nth state is,

En =  -13.6/n²

For n = 1

E₁ = -13.6 / 1²

E₁ = -13.6/1

E₁ = -13.6 ev

Kinetic energy of electron = -E₁ = 13.6 ev

For n = 5

E₅ = -13.6 / 5²

E₅ = -13.6/25

E₅ = -0.544 ev

Kinetic energy of electron = -E₅ = 0.544 ev

Wavelength of radiation emitted:

ΔE = hc/λ = E₅ - E₁

by putting values,

ΔE  = -0.544ev  - (-13.6 ev  )

ΔE  = 13.056 ev

Answer:

At elevated levels, carbon monoxide causes headaches, fatigue, and queasiness.

Explanation:The major indoor combustion pollutants are carbon monoxide (CO), nitrogen dioxide (NO2), fine and ultrafine particles, polycyclic aromatic hydrocarbons (PAHs), and formaldehyde. At elevated levels, carbon monoxide causes headaches, fatigue, and queasiness.

The net charge on the sulfur atom is -0.3 μC.

We must know that an atom is composed of electrons, protons and neutrons. Th electrons are found in the orbits, the protons are found in the nucleus along with the protons. We could add a net charge to the electron by adding or removing an electron from it.

Now we are trying to obtain the net charge, in coulombs, would you place on it if you put an extra electron on 1 in 10^12 of its atoms.

We have;

1 electron/ 1 * 10^12 * -(1.6 * 10^-19)/ 1 electron * 100g * 1 mol/32 g/mol * 6.02 * 10^23 atoms/mol

= -0.3 μC

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Missing parts;

What net charge would you place on a 100 g piece of sulfur if you put an extra electron on 1 in 1012 of its atoms? (Sulfur has an atomic mass of 32.1.)

In a muscle without lactate dehydrogenase, the availability of NAD+ is what limits the amount of ATP that can be produced by glycolysis.

An organic substance called adenosine triphosphate powers a variety of biological functions in living cells, including muscular contraction, nerve impulse transmission, condensate dissolving, and chemical production.

A vital "energy molecule" present in all living things is adenosine 5′-triphosphate, also known as ATP and typically written without the 5′-. In particular, it is a coenzyme that transfers energy to cells by releasing its phosphate groups when it interacts with enzymes like ATP triphosphatase.

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C3H7NO2

its an amino acid

its called

Alanine

Structure of : the carboxylic and amine groups are common to all amino acids. The central carbon atom is the Carbon atom

http://cmt.dur.ac.uk/sjc/thesis_prt/node8.html

https://www.chem.purdue.edu/jmol/molecules/alanin.html

Answer:

NH2C2H4COOH

Explanation:

Acid;

taste sour

Base

taste bitter

react with nonmetals

Both

can cause burns

conduct electricity

We know that a substances could be acidic, basic or neutral. We also know that there are many different definitions for the terms acid and base. The most common definition of the acid is that the acid has to do with the substances that is able to produce the hydrogen ions in solution. On the other hand, we define the base as the substance that is able to produce hydroxide ions in solution.

We know that the most applicable distinction between the acid and the base would be in the properties of the substances. An acid is an acid hence it would behave in a certain way. The base is a base thus it would behave in a certain way. In this question, we have been asked to class the acid and the base looking at the properties of each of the substances.

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The number of oxygen atoms in 0.00326 g of CaSO₄ · 2H₂O is 1.03 × 10²⁰ atoms of oxygen.

The molar mass of CaSO₄ · 2H₂O is given as follows:

CaSO₄: 136.15 g/mol

2H₂O: 36.05 g/mol

The total molar mass = 172.2 g/mol

Number of moles of CaSO₄ · 2H₂O = mass / molar mass

= 0.00326 g / 172.2 g/mol

CaSO₄ · 2H₂O = 1.894 × 10^-5 mol  

The ratio of CaSO₄ · 2H₂O to O atoms is 1: 9, so there will be 1.705 × 10^-4 moles of O atoms in the given mass.

The number of atoms is obtained by multiplying the number of moles of the substance with the Avogadro constant. Therefore, the number of oxygen atoms in 0.00326 g of CaSO₄ · 2H₂O is as follows:

1.705 × 10^-4 mol of O atoms × 6.022 × 10²³ atoms/mol ≈ 1.03 × 10²⁰ atoms of oxygen.

The number of oxygen atoms in 0.00326 g of CaSO₄ · 2H₂O is 1.03 × 10²⁰ atoms of oxygen.

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If you encounter a liquid chlorine leak in a one-ton container, the first action you should take to reduce the severity of the leak is (b) Spray the container with water.

The correct action to take first to reduce the severity of a liquid chlorine leak in a one-ton container is to spray the container with water. This helps to disperse the chlorine and reduce its concentration in the air. Option a, applying a caustic solution, may react with the chlorine and create a more hazardous situation. Option c, spraying with an ammonia solution, can create toxic fumes. Option d, rotating the container, may cause the leak to spread to other areas. In the event of a spill or leak, immediately put on escape-type respirator and exit the area. Immediately report leaks, spills or failures of the safety equipment (e.g., ventilation system). Secure the cylinder in an upright position.

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Given :

Volume of water , V = 63 ml .

To Find :

The volume of the water in \(dm^3\) .

Solution :

We know , 1 ml of water is equal to \(1 \ cm^3\) .

So , 63 ml of water is :

\(V=63 \ cm^3\)     .... equation 1 .

Now , 1 cm = 0.1 dm

Putting value of 1 cm in equation 1 .

We get ,

\(V=63\times (0.1\ dm)^3\\V=63\times 10^{-3}\ dm^3\\V=6.3\times 10^{-2}\ dm^3\)

Therefore , the volume of 63 ml water in \(dm^3\) is \(6.3\times 10^{-2}\ dm^3\) .

Hence , this is the required solution .

The total pressure become 1.514 atm

According to Dalton's Law of Partial Pressures, the partial pressure of a gaseous component in a gaseous mixture is equal to the pressure that the component would produce if it inhabited the container alone.

hence,

\(P_{mixture} = P_{A} + P_{B} +P_{C}\)

We are given \(P_{A}\)and\(P_{B}\), but we must determine \(P_{C}\). We may do this by assuming ideality and using the following formula:

\(P_{C}= \frac{0.110 mol . 0.0821 . 326}{9.10} =0.323atm\)

\(P_{mixture} = P_{A} + P_{B} +P_{C}\)

              =0.324 + 0.867+0.323

              =1.514 atm

The total pressure become 1.514 atm

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Answer:

tendons and ligaments

Answer:

please mark as brainliest!!

Explanation:

// C++ program to print initials of a name  

#include <bits/stdc++.h>  

using namespace std;  

void printInitials(const string& name)  

{  

   if (name.length() == 0)  

       return;  

   // Since touuper() returns int, we do typecasting  

   cout << (char)toupper(name[0]);  

   // Traverse rest of the string and print the  

   // characters after spaces.  

   for (int i = 1; i < name.length() - 1; i++)  

       if (name[i] == ' ')  

           cout << " " << (char)toupper(name[i + 1]);  

}  

// Driver code  

int main()  

{  

   string name = "prabhat kumar singh";  

   printInitials(name);  

   return 0;  

}

Answer:

#include<iostream>

using namespace std;

int main(){

char str[20];

int i=0;

std::cout<<"Enter a name:" ;

cin>>str;

cout<<*str;

while(str[i]!='\0'){

if(str[i]==' '){

i++;

cin>>*(str+i);

}

i++;

}

return 0;

}

Answer:

As sodium and potassium both are alkali metals that belong to Group IA of the periodic table. They have one valence electron in their valence shell. As we move from top to bottom, the reactivity of metallic elements of Group IA increases.

c. n3o5: tri nitrogen pentoxide is incorrect because the correct formula should be N2O5, representing two nitrogen atoms and five oxygen atoms in the compound.

The correct formula for trinitrogen pentoxide should be N2O5, not N3O5. Trinitrogen pentoxide consists of two nitrogen atoms (N2) and five oxygen atoms (O5). The prefix "tri-" indicates the presence of three nitrogen atoms. Therefore, the formula N2O5 correctly represents tri-nitrogen pentoxide.

Option c states N3O5 as the formula for tri-nitrogen pentoxide, which is incorrect because it suggests the presence of three nitrogen atoms and five oxygen atoms. The formula should have two nitrogen atoms and five oxygen atoms, as represented by N2O5.

The other formula/name pairs (a. MnCO3, b. MgSO4, d. BaCl2, and e. Fe2S3) are correct and match the correct names of the respective compounds (manganese(ii) carbonate, magnesium sulfate, barium chloride, and iron(ii) sulfide).

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The incorrect formula/name pair is Fe2S3: Iron(II) Sulphide. According to the formula Fe2S3, the correct name should be Iron(III) Sulphide.

The question is asking to identify the incorrect formula/name pair among the given options. The pairs are: (a) MnCO3: Manganese(II) Carbonate, (b) MgSO4: Magnesium Sulfate, (c) N3O5: Trinitrogen Pentoxide, (d) BaCl2: Barium Chloride, and (e) Fe2S3: Iron(II) Sulphide.

Using the rules of naming chemical compounds, the incorrect pair is (e) Fe2S3: Iron(II) Sulphide. The Roman numeral (II) in 'Iron(II)' indicates the oxidation number of Iron. According to the given formula, Fe2S3, there are 2 atoms of Iron and 3 atoms of Sulfur. Hence, the correct name should be Iron(III) Sulfide, not Iron(II) Sulfide. All the other pairs are correctly named.

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The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Transformations :

1. CaO + H₂O⇒Ca(OH)₂

2. CaO + CO₂⇒CaCO₃

3. Ca(OH)₂+ 2HCl⇒CaCl₂+2H₂O

4. Ca(OH)₂+H₂CO₃⇒CaCO₃+2H₂O

5. CaCO₃⇒CaO+CO₂

Answer: Mass remains constant

Explanation:

Answer:

The answer is 269.85 lb/cu ft

Answer:

When you are going to measure small lengths or objects or when you are going to measure things with great accuracy.

Explanation:

Answer:

sad? that your giving out free points?

Explanation:

Answer:

what wrong

tell i can help u

Explanation:

Answer:

23.77mole,85.1g/mol

Explanation:

the moles of liquid is 23.77mole which is obtained by divide 90.6kj to 3.811kj/mol and molar mass is obtained from the formula of mole eg mole=mass/molar mass but mass is given and moles is obtained above.

When the molar mass of the significance of the mass of the sample is 2022 g is = 23.77mole, 85.1g/mol.

When the molar mass of a chemical combination is defined as the mass of a sample of that compound separated by the amount of substance in that instance, measured in moles.

Although, The molar mass is a bulk, not molecular, property of a substance. The molar mass is an average of many instances of the combination, which often change in mass due to the existence of isotopes.

When the moles of liquid is 23.77mole which is received by dividing 90.6kj to 3.811kj/mol and molar mass is acquired from the formula of mole eg mole is = mass/molar mass but the mass is given and moles is conveyed above.

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meaning:An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some acids burn or dissolve other substances that they come into contact with.

Answer:

the release of energy

Answer:

Acidic

Explanation:

pOH = - log (9.8 x 10^-11)

pOH = 10

pOH + pH = 14

pH = 14-10

pH = 4

Anything below pH of 7 is acidic.

Ghosts are frequently used as metaphors for the need for justice since they are seen as supernatural echoes of a moral injustice.

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Answer:

569K

Explanation:

Q = 3.5kJ = 3500J

mass = 28.2g

∅1 = 20°C = 20 + 273 = 293K

∅2 = x

c = 0.449

Q = mc∆∅

3500 = 28.2×0.449×∆∅

3500 = 12.6618×∆∅

∆∅ = 3500/12.6618

∆∅ = 276.4220

∅2 - ∅1 = 276.4220

∅2 = 276.4220 + ∅1

∅2 = 276.4220 + 293

∅2 = 569.4220K

∅2 = 569K

When the temperature is increased, there is the increase in thermal energy of the system. The final temperature of the iron in kelvins is 570 K.

The energy is the ability to do work.

Given is the energy Q = 3.5 kJ = 3500 J, mass of sample m = 28.2 g, specific heat of iron Cp = 0.449 J(g•K).

The initial temperature in kelvins is T1 = 20°C = 20 + 273 = 293K

The heat is related to the temperature difference as

Q = m c ∆T

Substitute the values into the expression,

3500 = 28.2 × 0.449 × ∆T

3500 = 12.6618 × (T2 -T1)

T2 - T1 = 276.4220

T2 = 276.4220 K +293 K

T2 = 569.4220K

The temperature of the iron is approximately 570 K.

Thus, the final temperature of the iron in kelvins is 570K.

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