Which scientist developed the equation of wave mechanics?
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Related Questions
A pure solvent has a freezing point _________ the freezing point of a solution.a. equal to b. lower than c. higher than
The equation A + BX = AX + B is the general equation for a...a. double-replacement reaction. c. replacement reaction. b. decomposition reaction. d. combustion reaction.
What is a petroleum by-product that has excellent sealing properties to hold moisture in the skin? a) Talcum powder b) Lanolin c) Astringent d) Petroleum jelly
Gaseous water molecules condense when they _______. Liquid water molecules evaporate when they _______.
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Answer is "0.05 mol".
Explanation;
We can do calculation by using a simple formula as
n = m/M
Where, n is the number of moles of the substance (mol), m is the mass of the substance (g) and M is the molar mass of the substance (g/mol).
Here,
n = ?
m = 2.80 g
M = 56.08 g/mol
By substitution,
n = 2.80 g /56.08 g/mol
n = 0.0499 mol ≈ 0.05 mol
the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide.
the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction.
classify the reactions in (a) and (b).
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Synthesis Reaction
6Li(s) + N₂(g) ⇒ 2Li₃N(s)
Double Replacement Reaction
Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s)
Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)
What is double replacement reaction?
- A double-displacement reaction has the general formula AB + CD = AD + BC. Double-displacement reactions include the following examples: Ammonium Chloride, a salt, and sodium hydroxide, a base, combine to produce sodium chloride, hydrochloric acid, and water. In a double replacement process, the atoms of two compounds are switched, creating two new molecules.
- Metals always replace metals, and nonmetals always replace nonmetals in single replacement processes.
- Precipitates are frequently created by double replacement reactions when insoluble chemicals are created.
- Checking to see if the cations exchanged anions with one another is the simplest technique to determine whether a reaction is a double displacement.
- If the states of matter are mentioned, another indicator to look for is the production of a single solid product and watery reactants (since the reaction typically generates a precipitate)
To learn more about double replacement reaction, refer
#SPJ2
Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s) Double Replacement Reaction
Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)
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Taking into account the reaction stoichiometry, 51.84 grams of HCl is required to react completely with 12.8 g of aluminum to produce aluminum chloride and hydrogen gas.
Reaction stoichiometry
In first place, the balanced reaction is:
2 Al + 6 HCl → 2 AlCl₃ + 3 H₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- Al: 2 moles
- HCl: 6 moles
- AlCl₃: 2 moles
- H₂: 3 moles
The molar mass of the compounds is:
- Al: 27 g/mole
- HCl: 36.45 g/mole
- AlCl₃: 133.35 g/mole
- H₂: 2 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
- Al: 2 moles ×27 g/mole= 54 grams
- HCl: 6 moles ×36.45 g/mole= 218.7 grams
- AlCl₃: 2 moles ×133.35 g/mole= 266.7 grams
- H₂: 3 moles ×2 g/mole= 6 grams
Mass of HCl required
The following rule of three can be applied: If by reaction stoichiometry 54 grams of Al react with 218.7 grams of HCl, 12.8 grams of Al react with how much mass of HCl?
mass of HCl= 51.84 grams
Finally, 51.84 grams of HCl is required to react completely with 12.8 g of aluminum to produce aluminum chloride and hydrogen gas.
Learn more about the reaction stoichiometry:
next, take 12.8g/mr of aluminium
this will give u the mols of aluminium
next, take the ratio of HCL and Al, compare and find the mols of HCL.
take the mols of HCL/mr of HCL to give u mass
doneee
B) polar covalent
C) ionic
D) metallic
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(2) at the cathode in an electrolytic cell and at the anode in a voltaic cell
(3) at the anode in both an electrolytic cell and a voltaic cell
(4) at the anode in an electrolytic cell and at the cathode in a voltaic cell
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Negative ion arrives at the anode, attracted by electrostatic forces, where they lose electrons. Loss of electrons is defined as oxidation.
The reverse process occur at the negative electrode, where positive ions pick up electrons. They are reduced.
Answer : The correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.
Explanation :
As we know that there are two types of cell which are, electrolytic cell and electrochemical cell or galvanic cell.
Electrolytic cell : It is defined as the cell in which the chemical reaction occurs by passing of the current from external source.
In this electrolytic cell, the oxidation occurs at anode which is a positive electrode and reduction occurs at cathode which is a negative electrode.
Electrochemical cell : It is defined as the cell in which the chemical reaction occurs with the production of electric potential difference between the two electrodes. It is also known as voltaic cell.
In this cell, the oxidation occurs at anode which is a negative electrode and reduction occurs at cathode which is a positive electrode.
From this we conclude that, the oxidation occurs at the anode in both an electrolytic cell and a voltaic cell.
Hence, the correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.
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Answer: A is correct
Explanation: sorry if its wrong