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Related Questions
In each of the three reactions between NaOH and HCl, the sign of q for the water was positive. This means the the sign of q for the reaction was ______ and the reaction was ______.
The partial pressure of O2 in air at sea level is 0.21atm. The solubility of O2 in water at 20∘C, with 1 atm O2 pressure is 1.38×10−3 M. Part A Using Henry's law, calculate the molar concentration of O2 in the surface water of a mountain lake saturated with air at 20 ∘C and an atmospheric pressure of 665 torr . Express your answer using two significant figures. nothing
What is a characteristic of property acids pls help
Express the equilibrium constant for the combustion of propane in the balanced chemical equation c3h8(g)+5o2(g)???3co2(g)+4h2o(g)
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Answer:
80mL of 1.00M NaOH
Explanation:
Using H-H equation, we can determine oH of a buffer as acetate buffer. First, we need to determine amount of acetate ion and acetic acid at pH 3.50 and 5.07. Then, with the reaction of NaOH with acetic acid we can find the amount of 1.00M NaOH that must be added:
At pH 3.50:
pH = pka + log [C₂H₃O₂⁻] / [HC₂H₃O₂]
3.50 = 4.74 + log [C₂H₃O₂⁻] / [HC₂H₃O₂]
0.057544 = [C₂H₃O₂⁻] / [HC₂H₃O₂] (1)
Using and replacing in (1):
[HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.250 M
[HC₂H₃O₂] + 0.057544[HC₂H₃O₂] = 0.250 M
1.057544 [HC₂H₃O₂] = 0.250M
[HC₂H₃O₂] = 0.2364M * 0.500L = 0.1182 moles of acetic acid at first pH
At pH 5.07:
pH = pka + log [C₂H₃O₂⁻] / [HC₂H₃O₂]
5.07 = 4.74 + log [C₂H₃O₂⁻] / [HC₂H₃O₂]
2.13796= [C₂H₃O₂⁻] / [HC₂H₃O₂] (1)
Using and replacing in (1):
[HC₂H₃O₂] + 2.13796[HC₂H₃O₂] = 0.250 M
3.13796 [HC₂H₃O₂] = 0.250M
[HC₂H₃O₂] = 0.07967M * 0.500L = 0.0398 moles of acetic acid at first pH
Now, NaOH reacts with HC₂H₃O₂ as follows:
NaOH + HC₂H₃O₂ → NaC₂H₃O₂ + H₂O
As moles of acetic acid decreases from 0,1198 moles - 0,0398 moles = 0,08 moles of acetic acid are consumed = 0,08 moles of NaOH
0,08 mol NaOH * (1L / 1mol) = 0,08L of 1.00M NaOH =
80mL of 1.00M NaOH
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Due to property of conduction, conductor allows electrons and electric current to move easily,insulators prevent electric current from moving, electric current is the flow of an electrical charge in a circuit and electric circuit provides a path for electrons to flow.
What is conduction?
Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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Answer:
1st box:4
2nd box:2
3rd box:3
4th box:1
Explanation:
I am not 100% sure on this, but i am pretty confident that this is the answer! BUT If this is somehow wrong, please tell me so i can comment a better answer! :)
Answer with double replacement
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Answer:
Barium chloride + Sodium phosphate → barium phosphate + sodium chloride
Explanation:
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AC +BD
Chemical equation:
BaCl₂ + Na₃PO₄ → Ba₃(PO₄)₂ + NaCl
Balanced chemical equation:
3BaCl₂ + 2Na₃PO₄ → Ba₃(PO₄)₂ + 6NaCl
The cation and anion of both reactants are exchanged with each other.
Ba²⁺ react with PO₄³⁻ and form Ba₃(PO₄)₂ while Cl⁻ react with Na⁺ and form sodium chloride.
Molecular equation:
Barium chloride + Sodium phosphate → barium phosphate + sodium chloride
Final answer:
A double replacement reaction between barium chloride and sodium phosphate results in the formation of barium phosphate and sodium chloride.
Explanation:
The given chemical equation represents a double replacement reaction. The chemical reactants are barium chloride (BaCl2) and sodium phosphate (Na3PO4). In a double replacement reaction, the cations and anions of the two reactants switch places to form two new compounds.
So here is how the reaction would proceed: BaCl2 + Na3PO4 -> Ba3(PO4)2 + NaCl.
This translates to: Barium chloride reacts with sodium phosphate to form barium phosphate and sodium chloride.
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b) Noble Gases
c) Alkali Earth Metals
d) Actinides
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Answer:
I think it's D
Explanation:
your noble gases are in the 8th column
Your Halogens are your 7th column
and you alkali earth metals are the 2nd column
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Explanation:
a)Boyle's law states that pressure is inversely proportional to the volume of the gas at constant temperature.
(At constant temperature)
The equation given by this law is:
where,
are initial pressure and volume respectively.
are final pressure and volume respectively.
b) A graph of the relationship is attached as an image.
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Answer:
8.0 mol O₂
Explanation:
Let's consider the complete combustion reaction of C₉H₁₂.
C₉H₁₂ + 12 O₂ → 9 CO₂ + 6 H₂O
The molar ratio of C₉H₁₂ to O₂ is 1:12. The moles of O₂ required to react with 0.67 moles of C₉H₁₂ are:
0.67 mol C₉H₁₂ × (12 mol O₂/1 mol C₉H₁₂) = 8.0 mol O₂
8.0 moles of O₂ are required to completely react with 0.67 moles of C₉H₁₂.
Answer:
To react with 0.67 moles C9H12 we need 8.04 moles of O2
Explanation:
Step 1: Data given
Number of moles C9H12 = 0.67 moles
Step 2: The balanced equation
C9H12 + 12O2 → 9CO2 + 6H2O
Step 3: Calculate moles of O2 required
For 1 mol C9H12 we need 12 moles of O2 to produce 9 moles of CO2 and 6 moles of H2O
For 0.67 moles of C9H12 we need 12 *0.67 = 8.04 moles of O2
To produce 9*0.67 = 6.03 moles of CO2 and 6*0.67 = 4.02 moles H2O
To react with 0.67 moles C9H12 we need 8.04 moles of O2