Which type of reaction is represented by the generic equation AB + CD mc002-1.jpg AD + CB?combustion

decomposition

single replacement

double replacement

Answers

Answer 1

Answer:

Answer : Option D) Double replacement

Explanation : Double displacement or replacement reactions are those in which the two reactant molecules exchange the cations and anions between them and give a new product.

So, in this case when the reaction is AB + CD → AD + CB

Here, both the species of reactant compound molecule went replacement with the adjacent cation and anion group and formed a new compound or product. Therefore, this can be called as double replacement reaction.

Answer 2

Answer: The type of reaction is represented by the generic equation AB + CD -> AD + CB is double replacement. The rest of the choices do not answer the question above.

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Aluminum chloride and cesium undergo a single replacement reaction. What is the correct chemical equation for this reaction?a. AlCl3 + 3Cs yields No Reaction
b. AlCl2 + 2Cs yields 2CsCl + Al
c. AlCl3 + 3Cs yields 3CsCl + Al
d. 2AlCl3 + 6Cs yields 2AlCs3 + 3Cl2

Answers

Answer is C.

Explanation;

Single replacementreaction is a chemical reaction between an element and a compound. Theelement takes the position of another element in the compound by replacing.

Common equation is

A + BC → AC + B

Al is in 13th group ofthe periodic table. Hence, Al forms Al³⁺ by losing 3 electrons.Likewise, Cl is in 17th group of the periodic table and forms Cl⁻ by gaining one electron. Hence aluminiumchloride can be written as AlCl₃.

Cs is in 1st group ofthe periodic table. Hence, Cs tends to form Cs⁺ by losing an electron.

The reaction between Cs⁺ and Cl⁻ will form CsCl.

Since, this is a single replacement reaction, Al inthe AlCl₃ is replaced by Cs andCsCl is formed. The balancedreaction equation is

AlCl₃ + 3Cs → 3CsCl + Al

The answer is c. AlCl3 + 3Cs -> Al + 3CsCl. First you already know this reaction is a single replacement reaction. And next, the Al ion is usually +3, Cs ion is usually +1.

Calculate the atmospheric pressure if the boiling point of water is 81 degrees Celsius.

Answers

Answer : The atmospheric pressure of water if boiling at 81 °C will be 369 mmHg.

Explanation : The vapor pressure of boiling water can be calculated using the Antoine Equation:

log P = A - $[(B)/( C + T) ]$ ,

where P is the pressure in mmHg,

A = 8.07131,

B = 1730.63

C = 233.426

and T = temperature in °C (81°C)

Substituting the given values, we get,

Log P = 8.07131− $[(1730.63)/(233.426 + 81)]$

Therefore, Log P =8.07131 − 5.5041 = 2.567.

Now, P = $(10^(2.567) )$ =369 mmHg.

Hence, the atmospheric pressure will be 369 mmHg.

To calculate the atmospheric pressure at a specific boiling point of water, we use the steam table or the Antoine equation. From steam table via interpolation, at 81 C, the pressure where saturation occurs is the atmospheric pressure. The atmospheric pressure is 369.7 mm Hg or 0.4864 atm.

Background Info:The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly1 mol of a compound is formed from its constituent elements under standard conditions. The standard conditions are 1 atm pressure, a temperature of 25 ∘C , and all the species present at a concentration of 1 M . A "standard enthalpies of formation table" containing ΔH∘f values might look something like this:SubstanceΔH∘fH(g)218 kJ/molH2(g)0 kJ/molBa(s)0 kJ/molBa2+(aq)−538.4 kJ/molC(g)71 kJ/molC(s)0 kJ/molN(g)473 kJ/molO2(g)0 kJ/molO(g)249 kJ/molS2(g)129 kJ/mol

Question:
What is the balanced chemical equation for the reaction used to calculate ΔH∘f of BaCO3(s)?If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) for aqueous solution.
EXPRESS ANSWER AS A CHEMICAL EQUATION. Please explain for me too!!!

Answers

You will get at first carbon dioxide by burning C:
$C+O_2=CO_2$
Burn hydrogen to obtain water:
$H_2+(1)/(2)O_2=H_2O$
Combine them:
$CO_2+H_2O=H_2CO_3$
Now react it with Ba:
$Ba+H_2CO_3=BaCO_3+H_2$
To sum up, the reaction is $Ba+C+(3)/(2)O_2=BaCO_3$ , using hydrogen as a catalyst.

Answer:

You will get at first carbon dioxide by burning C:

C+O_2=CO_2

Burn hydrogen to obtain water:

H_2+\frac{1}{2}O_2=H_2O

Combine them:

CO_2+H_2O=H_2CO_3

Now react it with Ba:

Ba+H_2CO_3=BaCO_3+H_2

To sum up, the reaction is Ba+C+\frac{3}{2}O_2=BaCO_3, using hydrogen as a catalyst.

Explanation:

Why do scientists use stirbars in the laboratory?a. to cool a solution
b. to heat a solution
c. to decrease the surface area of a solute
d. to agitate a solution

Answers

Answer : The correct option is, (d) to agitate a solution

Explanation :

Stir bars is a type tool which is used in the chemical laboratory for mixing the solute in the solvent.

Stir bars is a magnet which is covered with such type of material that does not react with any liquid it is immersed in. Its cover is not react for any type of liquids.

The stir bar magnet is placed in a container or flask. The stir bar magnet made to spin with an external magnetic field.

The stir bar magnet is used in the laboratory to agitate a solution.

Hence, the correct option is, (d) to agitate a solution

D. to agitate a solution

The process of splitting an atom into two lighter atoms is called A. nuclear disintegration.
B. nuclear separation.
C. nuclear fission.
D. nuclear fusion.

Answers

Answer is: C. nuclear fission.

Nuclear fission is a nuclear reaction or a radioactive decay where nucleus of atom split into smaller ligher nuclei.

Nuclear fission is exothermic reaction which release large amounts of energy (electromagnetic radiation or as kinetic energy, which heat reactors where fission reaction take place).

Answer: The process of splitting of an atom into two lighter atoms is called is called nuclear fission.

Explanation:

There are two types of nuclear decay reactions:

Nuclear fission reactions: They are defined as the reaction in which, the heavier atoms splits into two or more lighter atoms. The number of atoms formed in this reaction increases from the given atoms.
Nuclear fusion reactions: They are defined as the reaction in which, two or more lighter atoms combine to form a heavier atom. The number of atoms formed in this reaction decreases from the given atoms.

Hence, the process of splitting of an atom into two lighter atoms is called is called nuclear fission.

The making of ice cubes is an endothermic reaction