[tex] \text{Given, Concentration of HCl}= 10 {}^{ - 6} M[/tex]
[tex] \text{After Dilution conc. of HCl =} \frac{10 {}^{ - 6} }{100} = {10}^{ - 8}M [/tex]
[tex] \therefore \text{pH = - log[H}^{ + } ][/tex]
[tex] \therefore \text{ pH }= - \log [{} {10}^{ - 8}] = 8[/tex]
[tex] \text{But} \: \text{This} \: \text{Is} \: \text{Not True Because} \\ \text{ An Acidic Solution Cannot have} \text{pH Greater than 7.} \\ \text{ In this case} [ {H}^{ + } ] \text{ Ions Of Water Molecule} \\ \: \text {Cannot Be Neglected.}[/tex]
Thus,[tex] {[H}^{ + } ] = {[H}^{ + } ] _{HCl} +{ [H + }^{ } ] _{H_2 O}[/tex]
As we know, ionic product[tex][H {}^{ + } ][OH {}^{ - } ] = 10 {}^{ - 14} \\ [H {}^{ + } ] = {10}^{ - 7} \\ [H {}^{ + } ] \text{total} = {10}^{ - 8} + {10}^{ - 7} \\ = {10}^{ - 8} (1 + 10) \\ = 11 \times {10}^{ - 8} [/tex]
[tex] \text{Now from, pH} = - \text{log}[H {}^{ + } ] \\ = \text{ - log}(11 \times {10}^{ - 8} ) \\ = - \text{ log}11 - \text{ log} {10}^{ - 8} \\ = 6.957[/tex]
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Which parts of Earth contain at least one form of water? Select all that apply. O
A. Cryosphere
B. Biosphere
C. Geosphere
D. Atmosphere
E. Hydrosphere
The parts of Earth that contain at least one form of water are Cryosphere, Biosphere, Geosphere, atmosphere and Hydrosphere. i.e all the given options are applicable.
All the parts of the earth contains at least one form of water and the hydrosphere on earth contains all form of water.
The atmosphere is the gaseous envelope round the earth. Breathing involves gaseous exchange between lungs and the atmosphere.
The biosphere is the living component. It is the part dominated and domiciled by life. T
The geosphere is the rock sphere of the earth. The earth's interior is all about the geosphere.
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Kl (aq) + _Pb(NO3)2 (aq) → __ KNO3 (aq) + _Pbl2 (s)
For the cell notation shown, which species is undergoing reduction?
For the cell notation shown, [tex]Ag(s)[/tex] is the species that is undergoing reduction.
What is reduction?Reduction can be defined as a chemical reaction or phenomenon through which the number of electrons or oxidation states associated with the atoms of a chemical element are changed.
This ultimately implies that, reduction is a half-reaction that typically involves decreasing the oxidation number of a chemical species, especially by gaining electrons.
In this scenario, [tex]Ag(s)[/tex] is the species that is undergoing reduction because it is not oxidized and it gains one (1) electron.
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Ag(s)
As here Ag gains one more electron from Ag^+1 so it undergoes reduction
Reduction simply means addition of hydrogen and gain of electron3. What is the volume of a 2 M solution of CaCl2, contains 15 grams of CaCl2?
V = n : M
Mr CaCl₂ : 111 g/mol
n = mole = mass : Mr
V = 15 g/111 g/mol : 2 M
V = 0.068 L
solve this questions please
Answer:
I think B is the right answer.
hope this answer will help you
Express solution concentration in terms of molality.
Explanation:
Molality of a solution is the number of moles of solute dissolved in 1 Kg of the solvent. Thus, if one gram molecule of a solute is present in 1 kg of the solvent.
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A 20. 0-liter flask contains a mixture of argon at 0. 72 atmosphere and oxygen at 1. 65 atmospheres. What is the total pressure in the flask? A. 0. 93 atm B. 2. 37 atm C. 8. 44 atm D. 18. 6 atm.
The total pressure of the system is equivalent to the sum of all the pressure of the individual gases. The total pressure of the flask is 2.37 atm.
What is total pressure?According to Dalton's law, the total pressure of the system will be equivalent to the total of the pressures exerted by the individual gases present in the system.
The total pressure of gases is given as,
[tex]\rm P = P_{1} +P_{2}+ P_{3}.....P_{n}[/tex]
Given,
The pressure of argon gas = 0.72 atmThe pressure of oxygen = 1.65 atmTotal pressure = PSubstituting values in the above equation:
[tex]\begin{aligned}\rm P &= 0.72 + 1.65\\\\&=2.37\;\rm atm\end{aligned}[/tex]
Therefore, 2.37 atm is the total pressure of the flask.
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Valence electrons are found on the ____ shell of an atom and ____ with other atoms. For most atoms, the magic number is __ electrons to make a compound stable. Elements in group 1 have ___ valences electron(s) and are most ____. Elements in group 18 have 8 valence electrons, making them “___” and not reactive.
HELP PLEASE FAST 100 POINTS
In any chemical reaction, the mass of the products must equal the mass of the reactants. The mass of product B is the same as the combined mass of Reactant A and H₂O.
Answer:
sh5barch shougi
Explanation:
If I have 5.2 moles of gas at a pressure of 1.9 atm and at a temperature of 46 °C, what is the volume of the
container that the gas is in?
Answer:T=200k
Explanation: the answer is 200k
SOMEONE HELP ME PLEASE
Convert the answer above to Kelvin
Answer:
313.15
Explanation:
Balance the chemical equation : CH₄ + O₂ → CO₂ + H₂O
Answer:
balanced equation: CH₄ + 2O₂ → CO₂ + 2H₂O
Explanation:
Given sample: CH₄ + O₂ → CO₂ + H₂O
The carbon is same, so no need to change. Hydrogen 2 less on left side so putted "2" before H₂O = "2H₂O"so now, there is total 4 oxygen on left side to balance put 2 before right side oxygen like this "2O₂"changes applied: CH₄ + 2O₂ → CO₂ + 2H₂O
Select the correct structure that corresponds to the name.
Answer: a
Explanation:
The correct option is A.
What is n-Propylbenzene used for?n-Propylbenzene is used to prepare benzoic acid. It is employed as a solvent for gas chromatography. It is also used as a solvent and an intermediate in organic synthesis.
How is propylbenzene formed?n-Propylbenzene is formed inside H-ZSM-11 channels by intermolecular SN2 trans-alkylation between cumene and benzene.
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a kettle takes 3 minutes to boil. Calculate what part of an hour it is.
Answer:
1/20
Explanation:
an hour is 60 minutes and its 3 minutes of an hour therefore its 3/60 hour or 1/20 of an hour
Answer:
soln,
=3×60
=180 answer
Stoichiometry Review Worksheet
1
Solid tin reacts with diatomic chlorine to produce tin (IV) chloride. If 95 grams of tir
react in an excess of chlorine, what mass of tin (IV) chloride is produced?
[tex]\\ \rm\longmapsto Sn+2Cl_2\longrightarrow SnCl_4[/tex]
Moles of Tin:-
95/118=0.8molHere
1 mol of Tin produces 1 mol Tin chlorideSo 0.8 mol will produce 0.8mol Tin chlorideMass of Tin chloride
[tex]\\ \rm\longmapsto 0.8(189)=151.2g[/tex]
13 of 120
10 83%
The total mass of the reactants is
equal to the total mass of
products. This is known as the
conservation of what?
Enter your answer
This is known as the law of conservation of mass.
conservation of mass
Requires an investment of energy
Anabolic
catabolic
Anabolism builds molecules required for the body's functionality. The process of catabolism releases energy. Anabolic processes require energy.
At which point is the slump block located?
Explanation:
At 4th point the slump block is located
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It is point 2, for anyone who sees this is the future
What is the mass of cs present in 15. 0 g of cesium acetate, formula csch3coo?.
Answer:
the answer is ''4g''
Explanation:
The mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.
To calculate the mass of Cs (caesium) present in 15.0 g of caesium acetate ([tex]\rm CsCH_3COO[/tex]), you need to determine the molar mass of [tex]\rm CsCH_3COO[/tex] and then find the proportion of Cs in the formula.
Molar mass of [tex]\rm CsCH_3COO[/tex]:
Cs: 1 atom * atomic mass of Cs = 1 * 132.91 g/mol = 132.91 g/mol
C: 2 atoms * atomic mass of C = 2 * 12.01 g/mol = 24.02 g/mol
H: 6 atoms * atomic mass of H = 6 * 1.01 g/mol = 6.06 g/mol
O: 2 atoms * atomic mass of O = 2 * 16.00 g/mol = 32.00 g/mol
Total molar mass of [tex]\rm CsCH_3COO[/tex] = 132.91 + 24.02 + 6.06 + 32.00 = 194.99 g/mol
Now, find the proportion of Cs in the formula:
Mass of Cs in 1 mol of [tex]\rm CsCH_3COO[/tex] = 132.91 g/mol
Mass of Cs in 15.0 g of [tex]\rm CsCH_3COO[/tex] = (15.0 g * 132.91 g/mol) / 194.99 g/mol ≈ 10.18 g
Thus, the mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.
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A)ants
B)sun
C)soil
D)air
Please help
Answer:
Abiotic factor would be soil.
Biotic factor would be ants.
Explanation:
3. What is the total pressure of a mixture of nitrogen and hydrogen, in atm, if the
partial pressure of nitrogen is 509.7 mmHg and the partial pressure of hydrogen is
630.3 mmHg?
Answer:
As per Dalton's law of Partial pressure,
The total pressure of a mixture of gases is equal to sum of partial pressure of individual components of the mixture.
So, P=P_H+P_N+P_WP=P
H
+P
N
+P
W
\implies 864\ mm=220\ mm+410\ mm+P_W\implies⟹864 mm=220 mm+410 mm+P
W
⟹ P_W=864-630=234P
W
=864−630=234 mm of Hg.
Explanation:
Hope it helps<3
When an atom of chlorine forms an ionic bond with an atom of sodium, the atom of sodium...
A) Loses an electron
B) Loses a proton
C) Becomes an ion with a larger radius than the atom of sodium
D) Gains an electron
When an atom of chlorine forms an ionic bond with an atom of sodium, the
atom of sodium loses an electron.
What is an Ionic bond?This is also known as electrovalent bond and it is the bond which occurs
as a result of elements gaining or losing electrons in a reaction.
An atom of chlorine forming an ionic bond with an atom of sodium,means
the atom of sodium will have to lose an electron in other to achieve a
stable octet configuration.
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Please answer the image and also explain the image using the words condensation evaporation condensed liquid water and rain
Answer:
Evaporation: The physical process or stage where the water changes to vapor in the sky.
Condensation: The physical process or stage where the vaporised water (vapor) changes to water (rain)
Condensed liquid water: It is called a condensate. From the image, the condensate is rain
1. State the law of Conservation of linear momentum.
2. Explain why momentum must be conserved in an isolated system.
Answer:
Law of conservation of linear momentum :- when there is no any external force applied on a system of particles then , momentum of system of particles will be conserved or you can say that if external force is zero. Then momentum of system of particles in intially = momentum of system of particles in finally
Explanation:
According to Newton's second law of motion, because no external force occurs on the system, The change in momentum is equal to zero; hence, the linear momentum is conserved. The entire linear momentum of an isolated system, that is, a system that is not subjected to any external forces, is conserved.
1. The total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.
2. It must be conserved in an isolated system because isolated systems do NOT exchange matter or energy with their surroundings.
How many grams of nitrogen trihydride would be produced if 9 moles of
hydrogen were used with excess nitrogen?
Reaction:
N₂ (g) + 3 H₂ (g) ---> 2 NH₃ (g)
mol NH₃ = H₂ (limited reactant) :
[tex]\tt \dfrac{2}{3}\times 9=6~moles[/tex]
grams: mol x Mr NH₃ (17 g/mol):
[tex]\tt = 6\times 17=102~g[/tex]
In the above equation how many moles of N2 can be made when 91 moles of CuO are
consumed?
Please help
What is TRUE about mitochondrial DNA?
A.
It is inherited from the biological father.
B.
It is inherited from the biological mother.
C.
It is found inside the nucleus of a cell.
D.
It is harder to collect than nuclear DNA.
Answer:
The answer is B
Answer: B
Explanation:
SOMEONE HELP ME PLEASE
Answer:
Convert the 60 and round it up with how ever many bars are above the 60
sorry if this doesnt help
Explanation:
The addictive chemical found in all tobacco products is.
Answer:
Nicotene
Explanation:
How did the lab activities help you answer the lesson question how do the processes of conduction, convection, and radiation help distribute energy on earth? what did you learn from conducting this lab?.
Answer:Conduction transfers heat between two materials that are touching, such as foil and chocolate pieces, or particles, such as the atoms in foil.Convection allows heat to be transferred in liquids, like water.Radiation transfers heat from a light bulb to paper.Conduction,
convection, and radiation move energy from the Sun to Earth and throughout Earth.
Explanation:
Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object.
Convection: This is a transfer of heat by mixing a fluid.
Radiation is the transfer of heat in wave form.
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.
Radiation is the transfer of thermal energy through thermal emission.
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