Answer:
sulfur
Explanation:
In oxygen family sulfur has yellow color and also having stinky smell. Thus given statements are about sulfur.
It is present in oxygen family.
It has six valance electrons.
Its atomic number is 16.
Its atomic weight is 32 amu.
The electronic configuration of sulfur is given below,
S₁₆ = 1s² 2s² 2p⁶ 3s² 3p⁴
We can see the valance shell is third shell and it have six electrons thus sulfur have six valance electrons. (3s² 3p⁴ )
Sulfur is used in vulcanisation process.
It is used in bleach and also as a preservative for many food.
it is used to making gun powder.
Help plz 11 points i need help plz give me TWO not one TWO
!!
What is a property of the Noble Gases? *
A. They are not reactive because their outer valence electron shell is full.
B They are very reactive
C. They can be found in the atmosphere
D. They react readily with oxygen in the atmosphere
Answer: A. They are not reactive because their outer valence electron shell is full.
Explanation:
Noble gases are group 18 elements which are Helium , Neon , Argon , Krypton , Xenon and radon.
Noble gases have general electronic configuration of [tex]ns^2np^6[/tex]
As the sub-shells of noble gases is fully filled and their octet is complete. Hence, it will not gain or lose any electron and thus is non reactive in nature.
They do not react with other elements under ordinary conditions.
Thus the correct statement is they are not reactive because their outer valence electron shell is full.
When a magnesium bromide solution is mixed with a lead(II) nitrate solution, a precipitate forms. Determine the balanced molecular equation, the
complete ionic equation, and the net ionic equation.
MgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)
Further explanationThe electrolyte in the solution produces ions.
The equation of a chemical reaction can be expressed in the equation of the ions
For strong electrolytes (the ionization rate = 1) is written in the form of separate ions, while the weak electrolyte (degree of ionization <1) is still written as an un-ionized molecule
In the ion equation, there is a spectator ion that is the ion which does not change (does not react) because it is present before and after the reaction
When these ions are removed, the ionic equation is called the net ionic equation
For gases and solids including water (H₂O) can be written as an ionized molecule
A molecular equation is a chemical equation expressed as a molecule
So only the dissolved compound is ionized ((expressed in symbol aq)
Reaction
The balanced molecular equationMgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)
The complete ionic equationMg²⁺(aq)+2Br⁻(aq) + Pb²⁺(aq)+2NO₃⁻(aq)⇒PbBr₂(s) + Mg²⁺(aq)+2NO₃⁻(aq)
spectator ions : Mg²⁺(aq) and 2NO₃⁻(aq)
The net ionic equation (remove the spectator ions)2Br⁻(aq) + Pb²⁺(aq)⇒PbBr₂(s)
The balanced molecular equation:
MgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)
The complete ionic equation:
Mg²⁺(aq)+2Br⁻(aq) + Pb²⁺(aq)+2NO₃⁻(aq)⇒PbBr₂(s) + Mg²⁺(aq)+2NO₃⁻(aq)
The net ionic equation
2Br⁻(aq) + Pb²⁺(aq)⇒PbBr₂(s)
Balanced molecular reaction:A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element. A reaction that contains the stoichiometric ratios of the reactants and products; these ratios can be used for mole -to-mole conversions.
Thus, the reactions when a magnesium bromide solution is mixed with a lead(II) nitrate solution, a precipitate forms is given above.
Find more information about Balanced chemical reaction here:
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What movement causes a year and how long is it
I hope it is helpful for ........
Please mark me as brainliest .......Answer:
Revolution of the earth around the sun in its own orbit. A complete revolution of the earth is a year equal to 365 days
Explanation:
What is another name for acetic acid? *
1. lemons, limes or oranges
2 .vinegar
3. vitamin C
PLEASE HELP
is this a chemical or physical change???
Answer:
Chemical, cause physical are changes affecting the form of a chemical substance, but not its chemical composition. This doesn't affect the substance but the composition.
Explanation:
A 700 mL sample of gas at STP is compressed to 300 mL, and the
temperature is raised to 100.C. What is the new pressure of the gas in atm?
Answer:
P₂ = 3.19 atm
Explanation:
Given data:
Initial volume = 700 mL
Initial pressure = 1 atm
Initial temperature = 273K
Final temperature =100°C (100+273= 373 K)
Final volume = 300 mL
Final pressure = ?
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₂ = P₁V₁ T₂/ T₁ V₂
P₂ = 1 atm × 700 mL × 373K / 273 K ×300 mL
P₂ = 261100 atm .mL. K /81900 K .mL
P₂ = 3.19 atm
Please help this affects my grade a lot and im confused
Double Replacement/Combustion I need to find the product of each one
zinc oxide + Cobalt(III) nitrite
Calcium hydroxide + phosphoric acid
Copper(I) dichromate + Iron(III) arsenate
Hydrochloric acid + aluminum hydroxide
1 ) Cobalt(II) nitrate react with nitrate zinc(II) to produce cobalt(III)-zinc oxide, nitrogen dioxide and oxygen
2Co(NO3)2 + Zn(NO3)2 → Co2ZnO4 + 6NO2 + O2
2) Calcium hydroxide react with phosphoric acid to produce calcium, hydrogen phosphate and water
Ca(OH)2 + H3PO4 → CaHPO4 + 2H2O
3) Copper(II) dichromate will react with Iron(III) arsenate to form Copper(II) Arsenate and Iron(III) dichromate
3Cr2CuO7 + 2AsFeO4 → Cu3(AsO4)2 + Fe2(Cr2O7)3
Reaction Type : Double Displacement
4) aluminium hydroxide and hydrochloric acid react to form aluminium chloride and water
Al(OH)3 + 3HCl → AlCl3 + 3H2O
what is stastical thermodaynamics deal?
Explanation:
Statistical thermodynamics is a theory that uses molecular properties to predict the behavior of macroscopic quantities of compounds. ... From these energy-level data, a temperature-dependent quantity called the partition function can be calculated.
Answer:
the stastical thermodaynamics deal is essentially a theory that you can use the molecules and their properties in order to predict how the molecule will behave in a macroscopic quantities of compounds. Using this, you can also tell a temperature-dependent quantity called the partition function.
(I also didn't copy and paste this, so it's safe for you to use)
May I have brainliest please? :)
According to the collision theory, which is required for a high number of effective collisions? a very low amount of force from colliding molecules a very low amount of kinetic energy from colliding molecules molecular collisions that have very specific orientations molecular collisions with energy to overcome activation energy
Answer:
the answer is D
Explanation:
i answered c and got it wrong on edg... i hope this helps :)
According to the collision theory, molecular collisions that have very specific orientations are required for a high number of effective collisions.
What is collision theory?Collision theory is used to predict the rates of chemical reactions, particularly for gases.
Based on the collision theory, a high frequency of effective collision is dependent on the molecular collisions that have very specific orientations.
The collision theory suggests that for reactions to occur, there must collision between reacting particles.
The number of collision is dependent on the number of collision per unit time as well as fractions of effective collision.
To attain effective collision, colliding particles must be properly oriented to give the desired product.
Hence, option C is correct.
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