Answer:
the pH of the pond is 4.0963
Explanation:
Given the data in the question;
4FeS₂(s) + 11O₂(g) ------> 2Fe₂O₃(s) + 8SO₂(g)
and oxidation of sulfur dioxide to trioxide
SO₃(g) + H₂O(l) --------> H₂SO₄(aq)
given that; coal = 61.7 metric tons = 61700 kg
1.20 % by weight S, therefore mass of sulfur in coal will be;
⇒ 61700 × 1.20% = 740.4 kg
moles of sulfur = (740.4 × 1000 g) / 32 g/mole = 23,137.5 moles
moles of so₂ produced
= same moles of so₃ and same moles of H₂SO₄ = 23,137.5 moles
volume of pond = 397 m x 258 m x 5.64 m = 577,682.64 m³ = 577682640 L
Molarity = moles / volume = 23,137.5 / 577682640 = 4.0052 × 10⁻⁵ M
now each mole of H₂SO₄ will give 2 moles of H⁺
[H⁺] = 2 × 4.0052 × 10⁻⁵ = 8.0104 × 10⁻⁵ M
pH = -log[H⁺]
pH = -log [ 8.0104 × 10⁻⁵ M ]
pH = 4.0963
Therefore, the pH of the pond is 4.0963
Hey! I was wondering how to get the solution to this question!
A solution was prepared by dissolving 0.541 g of benzoic acid (HC6H5COO) in 100 mL of
water. The pH was measured to be 2.78. What is the Ka for benzoic acid?
Answer:
6.22 × 10⁻⁵
Explanation:
Step 1: Write the dissociation reaction
HC₆H₅COO ⇄ C₆H₅COO⁻ + H⁺
Step 2: Calculate the concentration of H⁺
The pH of the solution is 2.78.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -2.78 = 1.66 × 10⁻³ M
Step 3: Calculate the molar concentration of the benzoic acid
We will use the following expression.
Ca = mass HC₆H₅COO/molar mass HC₆H₅COO × liters of solution
Ca = 0.541 g/(122.12 g/mol) × 0.100 L = 0.0443 M
Step 4: Calculate the acid dissociation constant (Ka) for benzoic acid
We will use the following expression.
Ka = [H⁺]²/Ca
Ka = (1.66 × 10⁻³)²/0.0443 = 6.22 × 10⁻⁵
Which of the following answers is true for the following statement?
The conjugate acid of a strong base is:
O aweak acid
O an amphiprotic acid
O a polyprotic acid
O a lousy (or very weak) acid
O a strong acid
it is either "aweak acid or a lousy (or very weak) acid"
I need help with chemistry :(
Answer:
How may we help kind sir
Explanation:
and if this was for points thanks
Which combination will make a buffer?
A. NaOH and NaCl
B. KOH and KC1
C. HC1 and NaCl
D. CH3COOH and CH3COONa
Answer:
D
Explanation:
A buffer solution contains (1)a weak base and its salt, or (2) a weak acid and its salt.
So, the combination of the weak acid CH3COOH and its salt CH3COONa will make a buffer.
Answer:
D. CH3COOH and CH3COONa
Explanation:
A buffer is made of:
- a weak acid + its conjugate base
- a weak base + its conjugate acid
A. NaOH is a strong base
B. KOH is a strong base
C. HCl is a strong acid
6. The drawing shows Samir riding his mountain bike.
i) Draw a circle around the places on the drawing where there
should be a lot of friction.
ii) Explain why there should be a lot of friction in these places.
Answer:
You Need To Upload The Photo Then I Will Help You :)
Explanation:
what is the difference between zinc and magnesium
Chlorine gas and solid phosphorus combine to produce phosphorus trichloride gas.
Write a balanced chemical equation for this reaction.
Most cooking utensils are made up of aluminum because aluminum is _____
Explanation:
Cooking utensils, such as pots, pans and menu trays, are often made from aluminium because it is lightweight and conducts heat well, making it energy-efficient for heating and cooling. These properties also make it a preferred material for packaging.
3) How many grams of calcium hydroxide are necessary to create 49.5 mL of a 1.55 M solution?
Answer:
5.68g
Explanation:
a'Zorria Ward
An elevator traveled 15 floors (150 ft) at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?
the direction the elevator traveled
how long the elevator was stationary
O how many times the elevator stopped
O the total mass of the elevator plus anything in it
Answer:
Velocity includes Direction
So you need to know if it was going up or down
Explanation:
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
Hope this helps!
Mention two functions performed by the concentrated sulfuric acid in the reaction
Answer:
Concentrated sulfuric acid is used as a catalyst, and has a dual role:
-Speeds up the reaction.
-Acts as a dehydrating agent, forcing the equilibrium to the right and resulting in a greater yield of ester.
The two functions performed by the concentrated sulfuric acid in the reaction is that Concentrated sulphuric acid often removes molecules of water from formic acid and it acts as a dehydrating agent in creation of carbon monoxide.
The function of the concentrated sulfuric acid in a reaction is that Concentrated sulfuric acid can be used as a catalyst.
It help to Speeds up the reaction and can also be a dehydrating agent, by bringing in the equilibrium to the right and leading to a greater yield of ester.
learn more about sulphuric acid from
https://brainly.com/question/4018599
How would you write 0.620 in scientific notation?
What volume, in mL, of 0.100 M NaOH is required to neutralize 35.0 mL of 0.102 M hydroiodic acid HI?
Answer:
35.7 mL NaOH
Explanation:
M1V1 = M2V2
M1 = 0.100 M NaOH
V1 = ?
M2 = 0.102 M HI
V2 = 35.0 mL
Solve for V1 --> V1 = M2V2/M1
V1 = (0.102 M)(35.0 mL) / (0.100 M) = 35.7 mL NaOH
Sugar is made of carbon , hydrogen, and oxygen atoms. sugar is ?
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate.
Explanation:
Phosphorus is implanted into silicon. The implant parameters are a dose of 1015cm-2at an energy of 150keV.a)Find the depth of the peak of the implant profile and its value at that depth.b)If the wafer originally had 1016cm-3of boron uniformly distributed throughout, find the depth(s) at which the concentration of phosphorus is equal to the concentration of boron.
Answer:
a) ≈ 4.99 / cm^3
b) 0.515 um
Explanation:
Given data:
energy = 150 Kev
dose of 10^15 cm^-2
A) find the depth of the peak of the implant profile and its value at that depth
expression for implant profile = written below in the attached file
value of the peak depth ≈ 4.99 / cm^3
B ) determine the depth at which the concentration of phosphorus is equal concentration of boron
= 0.515 um
attached below is the detailed solution to the problem
the lens of the eye is clear so that light can go through.
A. True
B. False
Answer:
true
Explanation:
the clear lens over the eye is called the cornea
How will an increase in the average yearly ocean temperature most
likely affect Earth's weather?
Answer:
I'd Say B
Explanation:
Usually potassium hydrogen phthalate is kept very pure. But Stu Dent thinks the bottle of potassium hydrogen phthalate has been accidently mixed with sodium chloride salt. He decides to use a titration to determine the amount of potassium hydrogen phthalate present. He weighs 2.3854 g of the contaminated potassium hydrogen phthalate mixture. The titration uses 17.47 mL of 0.5000 M sodium hydroxide. Use the titration volume and concentration to calculate the moles of potassium hydrogen phthalate actually reacted. Then use the molar mass (204.2 g/mol) to calculate the mass of potassium hydrogen phthalate actually reacted. Enter the mass to 4 significant digits with units of g.
Answer:
1.784 g
Explanation:
The equation of the reaction is;
NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)
Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M
Number of moles of NaOH reacted =8.735 * 10^-3 moles
From the reaction equation;
1 mole of NaOH reacted with 1 mole of KHC8H4O4
Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.
So,
Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g
Which phrase describes a compound that consist of two elements
Carbon dioxide, nitrous oxide, and methane are all compounds that consist of two elements
Water Cycle, what percentage of Earths water can be found in soil?
In what type of reaction is water always a product
when hydrogen and oxygen combine then they form water as product
also in neutralization reaction water form as product
hope it helps
Water is always a product in a type of chemical reaction called a neutralization reaction.
A reaction is a process that involves the transformation of one or more substances into one or more different substances.
Neutralization reaction is type of reaction occurs when an acid and a base react together to form a salt and water. The general equation for a neutralization reaction is:
[tex]\rm acid + base \rightarrow salt + water[/tex]
In this type of reaction, the hydrogen ions ([tex]\rm H^+[/tex]) from the acid combine with the hydroxide ions ([tex]\rm OH^-[/tex]) from the base to form water ([tex]\rm H_2O[/tex]). The remaining ions from the acid and the base combine to form a salt.
Therefore, water is always a product in a neutralization reaction, which occurs when an acid and a base react together to form a salt and water.
Learn more about reaction here:
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Fill in the blanks.
The regioselectivity of a reaction is often based on the energetics of the reaction. The kinetic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ________.
The thermodynamic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ___________.
Answer:
vcfg
Explanation:
The kinetic product of a reaction is the product with the high energy and favored when the temperature is low. The thermodynamic product of a reaction is the product with the low energy and favored when the temperature is high.
What is regioselectivity?Regioselectivity is that part of any chemical reaction where if product is formed by more than one ways than only one way will be prefererd in this condition.
In any system if chemical reaction is occur at low temperature then the fast formed product is the stable product which is kinetically favored, and have the high energy.In any system if chemical reaction is occur at high temperature then the slow formed product is the stable product which is thermodynamically favored, and have the low energy.Hence correct options are high energy, low, low energy and high.
To know more about regioselectivity, visit the below link:
https://brainly.com/question/8101441
How many mL of 0.25 M NaOH would have 0.18 moles of NaOH?
Answer:
720 mL
Explanation:
To answer this problem we'll use the definition of molarity:
Molarity = moles / litersWith that in mind we can calculate the volume in liters:
0.25 M = 0.18 moles / litersliters = 0.72 LFinally we convert liters to mL:
0.72 L * 1000 = 720 mLThus 720 mL of 0.25 M NaOH would have 0.18 moles of NaOH.
Look at Periodic Table. Which
element has 7 valence
electrons and is in period 3?
A. Fluorine
B. Sulfur
C. Chlorine
D. Bromine
Calculate the molarity of each of the following
solutions.
Part A
4.35 mol of LiCl in 3.60 L solution
Part B
29.43g of C6H12O6 in 1.37 L solution
Part C
34.5mg of NaCl in 119.1 mL of solution
Answer:
a. 1.21M
b. 0.119M
c. 0.00496M
Explanation:
Molarity, M, is an unit of concentration defined as the ratio between moles of solute and liters of solution:
a. 4.35 mol LiCl / 3.60L = 1.21M
b. 29.43gC6H12O6 * (1mol / 180.16g) = 0.1634moles / 1.37L = 0.119M
Molar mass C6H12O6: 180.16g/mol
c. 34.5mg NaCl = 0.0345g * (1mol / 58.44g) = 5.9x10⁻⁴moles / 0.1191L = 0.00496M
A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. 6.24 6.88 7.22 0.0722 0.0688
Answer:
6.88%
Explanation:
Step 1: Given data
Mass of CaCl₂ (solute): 27.7 gMass of water (solvent): 375 gStep 2: Calculate the mass of the solution
The mass of the solution is equal to the sum of the masses of the solute and the solvent.
mSolution = mSolute + mSolvent
mSolution = 27.7 g + 375 g = 402.7 g
Step 3: Calculate the percentage by mass of CaCl₂
We will use the following expression.
%m/m = mass CaCl₂/mass Solution × 100%
%m/m = 27.7 g/402.7 g × 100% = 6.88%
Please help me, im studying for finals and i need an answer to this question! Will mark brainliest for the answers that are the best!
Answer:
group of people assembled for religious worship.
a second definition:
a gathering or collection of people, animals, or things.
other words that mean the same thing as cogeneration:
assembly gathering assemblage convocation crowd flock group mass multitude!
I just need one more brainlest so if this helped! <3
The volume of water in a graduated cylinder is 88 mL. After a small object is placed in the cylinder, the volume increases to 100 mL. What is the volume of the object? First give your answer in milliliters, then in cubic centimeters.
Answer:
12mL or 12 cubic centimeters.
Explanation:
The displacement of water is equal to the volume of the object.
100 mL - 88 mL = 12 mL
One milliliter is equal to one cubic centimeter.
(R)-Limonene is found in many citrus fruits, including oranges and lemons. Draw its structures and identify the relationship between them.
Answer:
we cant draw jn this
Explanation:
because it contin citric acid