[tex]\\ \tt\leadsto pH=-log[H^+][/tex]
[tex]\\ \tt\leadsto -log[H^+]=13.2[/tex]
[tex]\\ \tt\leadsto log[H^+]=-13.2[/tex]
[tex]\\ \tt\leadsto [H^+]=antilog(-13.2)=6.3\times 10^{-14}M[/tex]
The concentration of [H3O+] will be 6.3 x [tex]10^{-14}[/tex] M
pHMathematically, pH = -log [H+] or -log [H3O+]
With a pH of 13.2:
-log [H3O+] = 13.2
log [H3O+] = -13.2
[H3O+] = 6.3 x [tex]10^{-14}[/tex] M
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Water, water everywhere. water is an abundant compound on our planet and it is sometimes known as "the universal solvent" because of it's unique properties, such as polarity and it's ability to dissolve almost any other substance. what implications does this have for the water found on earth? from the water in our oceans to the groundwater found deep beneath our soil? does this property benefit our planet? is there any problems you think the planet may face because of these unique properties?
The properties of water benefits our planet.
Does this property benefit our planet?Yes, the properties of water benefits our planet because it can dissolve huge number of solutes due to its polarity while on the other hand, its normal viscosity allows water to flow easily around the globe.
Is there any problems you think the planet may face because of these unique properties?No, in my opinion the planet may face no problems because of these unique properties because these properties are important for us.
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Pt 2. Chem Reactions 50 PTS
Hey, I need help with Chemistry. Please also provide an explanation as well!!
The red colour is the limiting reactant.
Red-blue colour ball and two white balls attached together are reactants.
Red-blue colour ball and two white and one red colour ball attached to each other are products.
What is a limiting reagent?The reactant that is entirely used up in a reaction is called a limiting reagent.
A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products.
A product is a substance that is present at the end of a chemical reaction.
Hence,
The red colour is the limiting reactant.
Red-blue colour ball and two white balls attached together are reactants.
Red-blue colour ball and two white and one red colour ball attached to each other are products.
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In terms of carbon monoxide, 1 marijuana joint is the equivalent of how many cigarettes?.
The main chemical compound in marijuana that has a harmful effect on cells lining the airways is tetrahydrocannabinol, or THC. This compound is similar to nicotine, which is the primary harmful chemical compound in cigarette smoke.
In addition to THC, marijuana smoke also contains more tar than cigarette smoke. Tar is made up of small particles that are easily inhaled and are known to be carcinogenic. The combination of the THC, nicotine, and tar in marijuana smoke is what makes it so damaging to cells lining the airways.
The daily smoking of one marijuana joint is equivalent to the amount of damage to cells lining the airways as around five cigarettes.
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Given that the initial rate constant is 0.0110s−1 at an initial temperature of 21 ∘C , what would the rate constant be at a temperature of 150∘C for the same reaction described in Part A?
This was part A
The activation energy of a certain reaction is 45.5 kJ/mol . At 21 ∘C , the rate constant is 0.0110s−1 . I got 32.4 degree C
The rate constant is mathematically given as
K2=2.67sec^{-1}
What is the Arrhenius equation?The rate constant for a particular reaction may be calculated with the use of the Arrhenius equation. This constant can be stated in terms of two distinct temperatures, T1 and T2, as follows:
[tex]ln(\frac{K2}{K1})= (\frac{Ea}{R})*(\frac{1}{T1}-\frac{1}{T2})[/tex]
Therefore
KT1= 0.0110^{-1}
T1= 21+273.15
T1= 294.15K
T2= 200
T2=200+273.15
T2= 473.15K
Ea= 35.5 Kj/Mol
Hence, in j/mol R Ea is
Ea=35.5*1000 j/mol R
[tex]ln(\frac{K2}{0.0110})= (\frac{35.5*1000}{8.314})*(\frac{1}{294.15}-\frac{1}{473.15}\\\\ln(\frac{K2}{0.0110})=5.492[/tex]
K2/0.0110 =e^(5.492)
K2/0.0110 =242.74
K2= 242.74*0.0110
K2=2.67sec^{-1}
In conclusion, rate constant
K2=2.67sec^{-1}
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Answer ASAP please!!!!!!
Answer:
They fall slower.
Explanation:
moon's gravitation force is effected by the mass of the moon
but because the moon has less mass,
objects fall slower because it has less gravitation force
________________________________________________
Hope this helped.
C₂H5OH +202 → 2CO2 + 3H₂O + 1367 kJ
What is the ratio between the energy and oxygen based on the equation?
-[?] kJ
[?]mol O2
The ratio between the energy and oxygen based on the equation is 683.5 KJ/mol
Data obtained from the questionEquation => C₂H₅OH + 2O₂ → 2CO₂ + 3H₂O + 1367 KJEnthalpy change (ΔH) = 1367 KJRatio of energy to oxygen =?How to determine the ratio of energy to oxygenFrom the equation, we obtained the following:
Energy = 1367 KJMole of O₂ = 2 molesThus, the ratio of energy to oxygen is given as:
Energy / Oxygen = 1367 / 2
Energy / Oxygen = 683.5 KJ/mol
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352 mL of chlorine under a pressure of 680. mm Hg are placed in a container under a
pressure of 1210 mm Hg. The temperature remains constant at 296 K. What is the
volume of the container in liters? (1 L = 1000 mL)
Explanation:
show the volume of container is equal to 198.82ml
How many moles of hydrogen atoms are contained in one mole of C6H12?
Answer:
72264x10²³moles
Explanation:
By Avogadro constant one mole of a substance is equal to 6022x10²³. so 12 hydrogen atoms =
12×6022x10²³=72264x10²³ moles.
A solution of 0.600m hcl is used to titrate 15.00 ml of koh solution. the endpoint of
titration is reached after the addition of 27.13 ml of hci. what is the concentration of
the koh solution?
9.000m
o 1.09m
o 0.332m
0 0.0163m
The final concentration is 0.332 M.
Calculation:Here, dilution formula is used,
The concentration of a solution is lowered by the process of dilution. This is commonly accomplished by increasing the solvent content of the solution, which lowers the moles per liter.
M₁V₁ = M₂V₂
where,
M₁ = Initial concentration
V₁ = Initial volume
M₂ = Final concentration
V₂ = Final volume
Given,
M₁ = 0.600 M
V₁ = 15.00 mL
V₂ = 27.13
To calculate,
M₂ =?
Put the given values in the above formula,
M₁V₁ = M₂V₂
0.600 × 15.00 = M₂ × 27.13
9 = M₂ × 27.13
M₂ = 9/27.13
M₂ = 0.332 M
Therefore the final concentration is 0.332 M.
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why aluminium is used in aeroplane ?
Answer:
Aluminum plays a vital role in the construction of aircraft. Its high resistance to corrosion and good weight to strength to cost ratio makes it the perfect material for aircraft construction. But the one property that makes aluminum the ideal metal for aircraft construction is its resistance to UV damage.
Explanation:
it's quite long but hope it helps
what piece of glassware (beaker, flask, graduated cylinder ) should be used to accurately measure out liquids? justify your answer
Answer:
graduated cylinder
Explanation:
that is the most accurate one of the 3. The lines on a beaker or flask are just indicative.
There are two stable isotopes of carbon, carbon -
12
and carbon -
13
. Carbon -
12
has a mass of exactly
12
amu, and carbon -
13
has a mass of
13.003
amu. The average atomic mass of carbon
is
12.011 amu. What does this tell you about the
relative abundances of the two isotopes?
a. Carbon -
12
is more abundant than carbon
13
because the average atomic mass is closer
to the mass of carbon
12
b. There is not enough information to
determine anything about the relative
abundances of the two isotopes.
c. Carbon
13
is more abundant than carbon
12
because the average atomic mass is closer
to the mass of carbon
13
d. Carbon
12
and carbon -
13
are equally abundant
There is not enough information to determine anything about the relative abundances of the two isotopes.
What are isotopes?Isotopes are atoms that have the same atomic number but different mass numbers. We know that all the isotopes of an element are not available to the same extent in nature.
Hence, from the average atomic mass of carbon, we can see that there is not enough information to determine anything about the relative abundances of the two isotopes.
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Answer: Carbon-12 is more abundant than carbon —13 because the average atomic mass is closer to the mass of carbon —12
Explanation: took the test and got it right
What is the total mass of the protons in a`typical ammonia (NH3) molecule? The mass of a proton is 1.673 × 10^-24 g, of a neutron 1.675 × 10^-24 g, and of an electron
9.109 × 10^-28 g.
The total mass of the protons is 1.338 * 10^-23 g
What is a proton?A proton is the positively charged particle in an atom. It is found in the nucleus along with the neutrons and are collectively called the nucleons.
The hydrogen atom has only one proton while the nitrogen atom has seven protons. Thus makes a total of eight protons in the ammonia molecule.
Hence, the total mass of protons in the ammonia molecule =
8 ( 1.673 × 10^-24 g) = 1.338 * 10^-23 g
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What volume of SO2, at room temperature and pressure is produced on heating 9.7g
of Zinc Sulphide (ZnS) if reaction takes place as follows
2ZnS()+ 302(g)
→2ZnO(+2SO2(g)
(A) 2.4 dm³
(B) 4.8 dm³
(C) none of these
Answer:
C. None of these
2 volumes of zinc sulphide produces two volumes of Sulphur dioxide. So, 9.7g of ZnS will produce nothing less than 9.7g of SO2.
How many grams of aluminum phosphate is produced from 7.5 g of lithium phosphate in this balanced equation? 2Li3PO4 + Al2(SO4)3 = 3Li2SO4 + 2AlPO4
7.8049856 g of aluminium phosphate is produced from 7.5 g of lithium phosphate in this balanced equation.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Given data:
[tex]2Li_3PO_4 + Al_2(SO_4)_3[/tex]→ [tex]3Li_2SO_4 + 2AlPO_4[/tex]
Moles of 7.5 g of lithium phosphate.
The molar mass of lithium phosphate is 115.79 g/mol.
Moles = [tex]\frac{mass}{molar \;mass}[/tex]
Moles =[tex]\frac{7.5 g}{115.79 g/mol}[/tex]
Moles = [tex]\frac{7.5 g}{115.79 g/mol}[/tex]
Moles = 0.06477243285
Now we will compare the moles of [tex]AlPO_4[/tex] with [tex]Li_3PO_4[/tex].
[tex]Li_3PO_4[/tex] : [tex]AlPO_4[/tex]
2 : 2
0.385 : 2÷2× 0.064 = 0.064 mol
Mass of [tex]AlPO_4[/tex] :
Mass of [tex]AlPO_4[/tex] = moles × molar mass
Mass of [tex]AlPO_4[/tex] =0.064 mol × 121.9529 g/mol
Mass of [tex]AlPO_4[/tex] = 7.8049856 g
Hence, 7.8049856 g of aluminium phosphate is produced from 7.5 g of lithium phosphate in this balanced equation.
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A piece of iron has a mass of 35,342 grams. Iron has a density of 7.9 grams per cubic centimeter. Find the volume of the piece of iron to the nearest cubic centimeter.
The volume of the piece of iron to the nearest cubic centimeter is 4473.6 cubic centimeter.
Calculation of volume:-density = mass / volume
volume = mass/ density
=35342/ 7.9
=4473.6 cubic centimeter
Describe density.The density of a substance indicates how dense it is in a given area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a particular physical characteristic of a specific thing. The Greek scientist Archimedes made the discovery of the density principle. If you are familiar with the formula and the relevant units, calculating density is simple. The letter D can also be used to signify density instead of the symbol.
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Element Z has the following properties: a. silvery-white solid at room temperature b. malleable c. used as a catalyst d. conducts electricity
Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.
Hence, option 3 is correct answer.
What is Metal and Non metal ?Metals are solid at room temperature. Metals are malleable. Metals loses electrons easily. Metal are less electronegative. Non metals are non malleable. Non metals cannot loses electron. Non metals are more electronegative.
What is Zig-Zag line in periodic table ?The Zig-Zag line called the amphoteric line, the semimetal line, the metal non metal line, the stair case and the metalloid line on the periodic table separates the metals from the non metals.
Thus from the above conclusion we can say that Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.
Hence, option 3 is correct answer.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: Element Z has the following properties:
a. silvery-white solid at room temperature
b. malleable
c. used as a catalyst
d. conducts electricity
Element Z can be classified as a _________ and will be found ________ the zigzag line of the periodic table.
(1) non-metal; along side of
(2) metal; along side of
(3) metal; to the left of
(4) metalloid, along side of
(5) non-metal; to the right of
Option 3 is correct
Element Z can be classified as a metal and will be found to the left of the zigzag line of the periodic table.
As the element Z conducts electricity, so it is a metal.
Metals can be hammered, crushed, or rolled into thin sheets without breaking due to a feature known as malleability.
As the given element Z is malleable, so it is a metal.
Most transition metals are also used as catalyst because they can activate other compounds by adsorbing them to their surface. As the element Z is used as catalyst, so it is metal.
Some other physical properties of metals are :
1) They are also good conductor of heat.
2) Highly ductile
3) They are lustrous
4) They are sonorous
Metals are present on the left side of the zig-zag line (the line that separates metals and non metals) whereas non-metals are present on the right side of this line.
As the Element Z is metal on the basis of the given properties left side of the zig-zag line, so it will be found to the left of the zigzag line of the periodic table.
Hence option (3) is correct
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arrangement of element by atomic weights provided mendeleev with some elements that didn't fit the patterns such as argon. explain how this problem was eventually overcome
Answer:
this problem was eventually overcome by arranging elements by increasing atomic number instead of atomic weight.
This problem was eventually overcome by arranging elements by increasing atomic number instead of atomic weight.
What is an atomic weight?The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons.
Mendeleev arranged the elements in order of increasing weight and broke them into rows such that elements in each column shared valence, the number of other atoms they combined with, as well as other properties.
In his 1869 Periodic Table, Mendeleev left blanks with suggested atomic weights for elements he thought would be discovered someday. William Ramsay's discovery of argon initially posed a threat to the Periodic Table. At first, Mendeleev believed argon was not an element, because it didn't react with anything.
Hence, this problem was eventually overcome by arranging elements by increasing atomic number instead of atomic weight.
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What does the development of hook-and-loop tape illustrate?
Answer:
the role of the microscope world in creating new material.
Explanation:
Trust me ;)
this is the question
How many unique tripeptides can be formed from 1 serine residue, 1 threonine residue, and 1 isoleucine residue
Answer:
6 (STI, SIT, TIS, ITS, IST
Increased concentrations of alpha-fetoprotein (AFP) in adults are most characteristically associated with:
Concentrations of alpha-fetoprotein (AFP):
Increased concentrations of alpha-fetoprotein (AFP) in adults are most characteristically associated with Hepatocellular carcinoma.
Alpha Fetoprotein (AFP):
It is a protein produced in a developing baby's liver. When a newborn is born, their AFP levels are typically high, but by the time they turn one, they are quite low. AFP levels in healthy persons should be extremely low. For adults, a typical AFP level ranges from 10 ng/mL to 20 ng/mL.
In reaction to cancer in the body, normal or cancerous cells produce chemicals known as tumor markers. High levels of AFP can indicate noncancerous liver illnesses such as cirrhosis and hepatitis as well as cancers of the testicles, ovaries, or liver.
Thus, one of the risk factors for Hepatocellular carcinoma has been proven to be a persistent increase in AFP serum levels.
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What volume (in mL) of 0.108 M aluminum hydroxide is required to neutralize 30.00 mL of 0.175 M nitric acid
The volume of aluminum hydroxide required for neutralization is 24.30 mL.
Acid and base:
The compounds which gives H+ ions in the aqueous solution are called acids while those which gives OH- ions are called base.
Neutralization reaction:
It is a chemical reaction that involves a reaction between the equal molar amount of acid and base and form a solution that has pH = 7.
Calculations:
The reaction between aluminum hydroxide and nitric acid is expressed as:
Al(OH)2 + 2HNO3 ----> Al(NO3)2 + 2H2O
The number of moles of nitric acid is calculated as:
Moles of HNO3 = 0.175 M x (30.00/1000) L = 0.00525 mol
The number of moles of Al(OH)2 required for the neutralization is:
Moles of Al(OH)2 = 0.00525 mol/2 = 0.002625 mol
The volume of Al(OH)2 is calculated as:
Volume = 0.002625 mol/0.108 M = 0.0243 L = 24.30 mL
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What conclusion can you make about the atomic number and the number of neutrons for the first 20 elements of the Periodic Table?
Answer: It has more neutrons. Its mass number is larger than the atomic mass number for carbon.
Explanation:
We can see that all the isotopes of Carbon occupies the same slot in the periodic table and thus the same periodic number.
Atomic number of carbon = 6
Periodic Table gives us the information of Atomic number and mass number of atoms of an element.
Atomic number does not give any information about the number of neutrons of an atom. Atomic number of an element is the number of protons in the nucleus of each atom of that element.
Mass number is defined as the total number of protons and neutrons in an atom. Mass number of a typical carbon atom is equal to 12.
Isotopes are variants of a particular chemical element which differ in number of neutrons. Hence, the mass number of different isotopes of the same element varies and gives us information about the number of neutrons present in that atom at the same time.
The mass number of Carbon-14 is equal to 14.
Atomic number of C-14 = Protons in Carbon-14 = 6
Neutrons in Carbon-14 = Mass Number - Atomic Number
Neutrons in C-14 = 14-6
= 8
When butane burns completely, only water and carbon dioxide gas are produced. If 11.6 g of butane and 40.0 L of oxygen at 22.0o C and 102 kPa react, what volume of carbon dioxide gas also at 22.0o C and 102 kPa can be collected over water. The vapour pressure of water at 22.0o C is 2.24 kPa.
2C4H10(g) + 13O2(g) --> 10H2O(g) + 8CO2(g)
19.7 litre volume of carbon dioxide gas at 22.0o C and 102 kPa can be collected over water.
What is vapour pressure?Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature.
Moles of Butane = mass in grams / molar mass = 11.6 / 58.12 = 0.2
Volume of [tex]O_2[/tex] (V) = 40 liter
Temperature (T) = 22°C = 22 + 273 = 295 K
Pressure (P) = 102 kPa = 102 / 101.325 = 1.007 atm
Moles of [tex]O_2[/tex] (n) can be calculated by ideal gas equation.
PV = nRT
n = 1.007 40 ÷ 0.0821 295 = 1.663
Balanced chemical reaction;
2[tex]C_4H_10[/tex] + 13[tex]O_2[/tex] ---> 8[tex]CO_2[/tex] + 10[tex]H_2O[/tex]
From reaction;
13 moles [tex]O_2[/tex] require 2 moles [tex]C_4H_10[/tex]
So, 1.663 moles [tex]O_2[/tex] will require = 2 x 1.663 ÷13 = 0.256 moles of [tex]C_4H_10[/tex]
Thus [tex]C_4H_10[/tex] is a limiting reagent. So it will drive the yield of [tex]CO_2[/tex].
Moles of [tex]CO_2[/tex] produced = (8/2) 0.2 = 0.8 moles
Pressure of [tex]CO_2[/tex] (P) = 102 - 2.24 = 99.76 kPa = 99.76 ÷ 101.325 = 0.985 atm
Applying the ideal gas equation for [tex]CO_2[/tex],
PV = nRT
0.985 V = 0.8 0.0821 x 295
V = 19.7 liter
The volume of [tex]CO_2[/tex] produced = 19.7 liter.
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What volume is occupied by 9.50 g c6h12 at stp (standard temperature and pressure)?
Molar mass
6(12)+12(1)7(12)84g/molNo of moles
Given mass/Molar mass9.5/840.113molVolume
22.4L(0.113)2.5LHow many faradays are transferred in an electrolytic cell when a current of 2.0 A flows for 12 hours
The Faradays transferred during the process is 86400 C.
An electric current in a circuit is calculated by dividing the total charge that runs in the circuit with the total time taken.
I = Q/t
Rearrange the formula to express it in terms of charge.
Q = I x t
Calculations:
Convert 12 h to s.
12 h = (12 x 60 x 60) s = 43200 s
Substitute the values in the above formula.
Q = 2.0 C/s x 43200 s
= 86400 C
Therefore, the charge (Faradays) transferred in an electrolytic cell is 86400 C.
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The concentration ratio for an oligopoly is Group of answer choices Over 60 percent 90 percent 100 percent Under 40 percent
The concentration ratio for an oligopoly is Over 60 percent.
The concentration ratio reveals the intensity of rivalry among the businesses that make up an industry. It measures the size of the firms in relation to the total industry. The presence of a monopoly in a certain industry or the absence of competition for such enterprises are both indicated by high concentration ratios that are closer to 100%.As a general rule, an oligopoly is present when the top five companies in the market account for more than 60% of all market sales. When one company's concentration ratio equals 100 percent, the market is said to be monopolized.learn more about oligopoly here: https://brainly.com/question/13635083
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What is the oxidation state of cobalt (III)?
The oxidation state of cobalt (III) is: +3
Meaning of Oxidation stateOxidation state can also be referred to as oxidation number.
Oxidation state can be defined as total number of electrons that an atom must either loose or gain for it to form a chemical bond with another atom.
In conclusion, The oxidation state of cobalt (III) is: +3
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Hello! So I need help with these neutralization reactions and its fill in the blank. The question asks,
Balance the following neutralization reactions:
_______ HBr + _______ KOH _______KBr + _______H2O
_______ HF + _______ Fe(OH)3 _______FeF3 + ______ H2O
______HCl + _______ Ca(OH)2 _______CaCl2 + ______ H2O
The balanced equation for the neutralization reactions is as below.
Balancing chemical reaction equationsIn order for chemical equations to be balanced, the number of atoms of each element before and after the reaction must be equal.
Thus:
[tex]HBr + KOH --- > KBr + H_2O[/tex][tex]3HF + Fe(OH)_3 --- > 3 H_2O + FeF_3[/tex][tex]2HCl + Ca(OH)_2 --- > CaCl_2 + 2H_2O[/tex]More on balancing chemical equations can be found here: https://brainly.com/question/15052184
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