Answer:
the concentration of the Zn²⁺ (aq) ion at the cathode is 0.255 M
Explanation:
The voltage generated by the zinc electric cell that is discribed by the following relation;
[tex]Zn(s)\mid 0.1MZn^{2+(aq)}\parallel 0.2 Zn^{2+}(aq)\mid Zn(s)[/tex]
The Nernst equation is given as follows;
[tex]E = E^0 - \frac{RT}{nF} ln(\frac{a^b_B}{a^a_A} )[/tex]
[tex]E_{anode} = E^0 - \frac{0.0591}{2} logZn^{2+}[/tex]
[tex]E_{anode}-E_{cathode} =-\frac{0.0591}{2} log\frac{[Z^{2+}]}{[x]}[/tex]
[tex]0.012 =-\frac{0.0591}{2} log\frac{0.1}{[x]}[/tex]
x = 0.255 M.
Therefore the concentration of the Zn²⁺ (aq) ion at the cathode = 0.255 M.
Can Thiocyanic acid, HSCN, can be a Bronsted-Lowry Acid? How about a Bronsted-Lowry Base?
Answer:
Explanation:
A Brönsted-Lowry acid is defined as any substance that has the ability to lose, or "donate a proton" [H +].
A Brönsted-Lowry base is a substance capable of gaining or "accepting a proton" [H +].
Then a proton transfer occurs, which requires the presence of a proton donor, that is, an acid and a base that accepts them.
This theory has the disadvantage of leaving out several substances that are acidic and that do not have protons.
Thiocyanic acid is a chemical compound that can be considered, but not a Bronsted Lowry base, giving up the proton and generating the anion [SCN] -
Answer:
It can be a bronsted Lowry acid but not a bronsted Lowry base
Explanation:
Bronsted Lowry acid are proton donors, and HSCN can donate a proton, but it cannot accept a proton, hence not a bronsted Lowry base
Chemical formula for beryllium oxide
Answer:
BeO
Explanation:
The chemical formula for beryllium oxide is BeO, following the combination of beryllium (Be2+) cations with oxide (O2-) anions in a 1:1 ratio, reflecting the stoichiometry of the compound and its ionic character.
The chemical formula for beryllium oxide is BeO. Beryllium oxide forms when beryllium, an alkaline earth metal with an atomic number of 4, combines with oxygen. Each beryllium atom releases two electrons, forming a Be2+ cation to Oxide2-. The resultant ionic compound, BeO, is a reflection of this 1:1 charge balance between beryllium and oxygen.
Beryllium compounds generally exhibit a significant degree of covalency. In particular, beryllium forms covalent bonds in different environments, as seen in compounds like beryllium hydride (BeH2) and basic beryllium acetate [tex](Be_{4} O(CH_{3}CO_{2} )_6)[/tex].
Although beryllium's tendency to form covalent bonds might suggest a preference for complex molecular structures, BeO is a simple, stable compound with each beryllium atom adopting an electron configuration similar to that of helium, the noble gas that precedes it in the periodic table.
Which tool would you use to predict the percentage of offspring that will have a specific trait?
Group of answer choices
Microscope
Flowchart
Pedigree chart
Punnett square
Answer: punnet square
Explanation:
2.0 L HC2H3O2 (acetic acid) is made by diluting 75. mL of 17.6M acetic acid. What is the molarity of the new solution ?
Answer:
0.66M
Explanation:
The dilution equation is:
C₁V₁ = C₂V₂Where C₁ and C₂ are concentrations and V₁ and V₂ are volumes of the concentrated and diluted solutions.
First, convert the 75. mL volume into liters:
75. mL × 1 liter / 1,000 mL = 0.075 literNow, substitute the data into the dilution formula:
2.0 liter × C₁ = 0.075 liter × 17.6MC₁ = 0.075 liter × 17.6M / 2.0 liter = 0.66M ← answerThe molarity of the new 2.0 L solution made by diluting 75 mL of 17.6M acetic acid is 0.66M, calculated using the dilution equation M1 x V1 = M2 x V2.
To calculate the molarity of the diluted acetic acid solution, we can use the concept of dilution, which is described by the equation
M1 x V1 = M2 x V2, where:
Using the provided information, M1 = 17.6M, V1 = 75 mL, and V2 = 2,000 mL (as 2.0 L is equivalent to 2,000 mL). We need to solve for M2, the molarity of the new solution:
M1 x V1 = M2 x V2
17.6M * 75 mL = M2 * 2,000 mL
M2 = (17.6M * 75 mL) / 2,000 mL
M2 = 0.66M (rounded to two decimal places)
Therefore, the molarity of the diluted acetic acid solution is 0.66M.
Write the symbol notation for the silicon isotope that contains 16 neutrons
Final answer:
The symbol notation for the silicon isotope with 16 neutrons is ¹⁴Si, where 14 is the atomic number and 30 is the mass number (sum of protons and neutrons).
Explanation:
The silicon isotope that contains 16 neutrons has a symbol notation that includes the element's atomic number, which is 14 for silicon (Si), and its mass number. The mass number is the sum of the number of protons and neutrons in the nucleus. For this isotope of silicon with 14 protons and 16 neutrons, the mass number is 14 + 16 = 30. Therefore, the symbol notation for this isotope is ¹⁴Si.
In two or more complete sentences, describe the process of fractional distillation that used to refine crude oil.
Answer:
heated crude oil enters a tall fractionating column , which is hot at the bottom and gets cooler towards the top.
vapours from the oil rise through the column.
vapours condense when they become cool enough.
liquids are led out of the column at different heights.
sorry for bad spelling i think this is right
hope this helps :)
Heated crude oil needs to enter a tall fractionating column that is hot at the bottom and cools as it ascends. The oil vapors rise through the column. When vapors cool sufficiently, they condense.
What is fractional distillation?A mixture of liquids is boiled in a fractional distillation, and the resulting vapors travel up a glass tube known as a "fractionating column" and separate.
The fractionating column, which is positioned between the flask containing the mixture and the "Y" adaptor, improves the separation of the liquids being distilled.
In general, the distillation process consists of three major steps: The process of converting a desired liquid from a mixture into vapor. The purified liquid's condensation. The condensed liquid collection.
Heated crude oil enters a tall fractionating column, which is hot at the bottom and cools as it ascends.
The oil vapors rise through the column. When vapors cool sufficiently, they condense. At various heights, liquids are led out of the column.
Thus, these are the steps involved in fractional distillation that used to refine crude oil.
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What solute can be found in the greatest amount in urine?
Answer:
THE CORRECT ANSWER TO THE QUESTION ABOVE IS " UREA"
Explanation:
SOLUTE is defined as solid, liquid, or gas that is dissolved in a solution.
URINE is a by-product of metabolism that is produced by the kidneys in their process of blood purification. URINE contains of water, urea, chloride, sodium, potassium, dissolved ions, and inorganic and organic compounds.
Physical characteristics of URINE include color, smell, pH, density and turbidity.
UREA (also known as carbamide) is a non-toxic molecule, it is made up of ammonia and carbon and is the major organic component of human urine. UREA in urine is 9.3 g/L.
How much of NaCl is in 1.90 L of 0.300 M
NaCl?
Answer in units of mol.
Answer:
The answer to your question is 0.57 moles
Explanation:
Data
volume = 1.9 L
[NaCl] = 0.3
moles of NaCl = ?
Process
1.- To solve this problem use the formula of Molarity.
Molarity = moles/ volume (l)
-Solve for moles
moles = Molarity x volume
-Substitution
moles = 0.3 x 1.9
-Result
moles = 0.57
-Conclusion
There are 0.57 moles of NaCl in 1.90 L of a 0.3 M solution.
A solution with a ph of 2 has how many more protons in it than a solution with a ph of 4?
The solution with a pH of 2 has 100 times more protons in it than the solution with a pH of 4.
The pH scale is a logarithmic scale that quantifies a solution's acidity or alkalinity based on the concentration of hydrogen ions (protons) in it. Each unit on the pH scale reflects a tenfold change in hydrogen ion concentration. When compared to a solution with a pH of 4, a solution with a pH of 2 has a larger concentration of hydrogen ions. In particular, for every pH unit reduction, the concentration of hydrogen ions increases by a factor of ten. As a result, a pH 2 solution contains 102 (100) times more hydrogen ions than a pH 4 solution.
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A solution with a pH of 2 has a hundred times more protons than a solution with a pH of 4. PH measures the concentration of hydrogen ions (protons) in a solution in a logarithmic scale, where each unit decrease indicates a tenfold increase.
Explanation:The pH scale is a logarithmic measure of the concentration of hydrogen ions (protons) in a solution. A solution with a pH of 2 has a hundred times (102) more protons than a solution with a pH of 4, because each unit decrease on the pH scale represents a tenfold increase in proton concentration. Therefore, a decrease from pH 4 to pH 2 constitutes a hundredfold increase in proton concentration.
Learn more about pH scalehttps://brainly.com/question/31474123#SPJ11Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion would NOT be present in the complete ionic equation?
In the precipitation reaction, the ion that would NOT be present in the complete ionic equation is the iodide ion (I-).
Explanation:In the precipitation reaction Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq), the ions Pb2+ and NO3- are present in the complete ionic equation because they are soluble in water and dissociate into ions. However, the solid PbI2 that forms is insoluble in water and does not dissociate into ions. Therefore, the iodide ion (I-) is the ion that would NOT be present in the complete ionic equation.
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In the given precipitation reaction, all ions mentioned would be present in the complete ionic equation because soluble compounds turn into ions in such reaction. However, the potassium ion (K+) and the nitrate ion (NO3-) do not partake in the formation of the solid lead iodide, so they are omitted from the net ionic equation.
Explanation:The question is asking about a precipitation reaction, which is when an insoluble compound forms in an aqueous solution. For the reaction given (2KI(aq) + Pb(NO3)2(aq) → PbI₂ (s) + 2KNO3(aq)), the insoluble compound that forms is lead iodide (PbI₂), which is why it is denoted with an (s) for solid. Soluble compounds break down into ions in aqueous solutions, meaning Pb(NO3)2(aq) becomes Pb²⁺ + 2NO3⁻, and 2KI(aq) becomes 2K⁺ + 2I⁻. The products would then be K⁺ + NO3⁻ from KNO3(aq) and PbI₂(s), which stays unbroken because it is insoluble. Therefore, the complete ionic equation would be Pb²⁺(aq) + 2NO3⁻(aq) + 2K⁺(aq) + 2I⁻(aq) → PbI₂(s) + 2K⁺(aq) + 2NO3⁻(aq).
In such an equation, the ions that are on both sides of the equation (i.e., do not participate in generating the solid) are spectator ions and can be omitted to achieve the net ionic equation. For our reaction, the spectator ions are K⁺ and NO3⁻. Thus, they would NOT be present in the net ionic equation, but they would still be present in the complete ionic equation.
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Which process moves molecules and has these traits?
cess Moves
-moves from high concentration to low concentration
-moves from uneven distribution to even distribution
-can occur when there is no membrane
active transport in a cell
diffusion
osmosis
passive transport in a cell
A banana rots if left out too long. What type of property is this?
A. A physical property
B. A chemical property
C.A mechanical property
D.A metallic property
15. Three gases are mixed in a cylinder. The total pressure in the cylinder is 456 mmHg. If
the hydrogen gas has a pressure of 230 mmHg, and the oxygen gas has a pressure of
148 mmHg, what is the pressure of the third gas, nitrogen?
Answer:
78 mmHg is the partial pressure of the nitrogen.
Explanation:
According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.
[tex]P=p_{1}+p_{2}+p_{3}[/tex]
where,
[tex]P[/tex] = total pressure of the gas mixture = 456 mmHg
[tex]p_{1}[/tex] = partial pressure of hydrogen gas = 230 mmHg
[tex]p_{2}[/tex] = partial pressure of oxygen gas = 148 mmHg
[tex]p_{3}[/tex] = partial pressure of nitrogen gas = ?
Now put all the given values is expression, we get the partial pressure of the nitrogen gas i.e. [tex]p_3[/tex] .
[tex]456 mmHg=230 mmHg+148 mmHg+p_3[/tex]
[tex]p_3=456 mmHg-230 mmHg-148 mmHg=78 mmHg[/tex]
78 mmHg is the partial pressure of the nitrogen.
What element is represented by [Rn]7s1?
Answer:
Radon
Explanation:
The element represented by [Rn]7s1 is francium (Fr), an alkali metal in Group 1 of the periodic table. Francium is highly reactive and extremely rare, with a short half-life.
Explanation:The element represented by [Rn]7s1 is francium (Fr).
Fr is an alkali metal in Group 1 of the periodic table and has the atomic number 87. It is highly reactive and can be found in very small amounts in minerals.
Fr is the second rarest naturally occurring element and is extremely unstable, with a very short half-life.
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As kinetic energy of a molecule increases, will the
temperature increase, stay the same, or decrease?
Answer:
Temperature increase with the increasing Kinetic energy of the molecule.
Explanation:
When Kinetic energy of the molecule increases, the number of collisions increases between the molecule. Hence, By speeding up the molecule temperature increases.
How many calories of heat are required to raise the temperature of 20
grams of water from 30 degrees Celsius to 40 degrees Celsius?
(Specific heat of Water = 1 calorie/gram °C OR 4.186 joule/gram °C)
Answer:200 c
Explanation:
Final answer:
To raise the temperature of 20 grams of water from 30°C to 40°C, 200 calories of heat are required.
Explanation:
To calculate the amount of heat required to raise the temperature of water, we can use the equation:
heat = mass * specific heat * temperature change
In this case, the mass of water is 20 grams, the specific heat of water is 1 calorie/gram °C, and the temperature change is 10 °C. Substituting these values into the equation:
heat = 20 g * 1 calorie/g °C * 10 °C = 200 calories
Therefore, 200 calories of heat are required to raise the temperature of 20 grams of water from 30 °C to 40 °C.
Question 11 (10 points)
Besides water, what is the product of a Neutalization Reaction between Al(OH)3 and HNO2?
a. Al(NO2)3
b.Al3NO2
c.(NO2)3A1
d.AINO2
Answer:
The correct answer is option a.
Explanation:
When aluminum hydroxide reacts with of nitrous acid it gives of aluminum nitrite and of water.
[tex]Al(OH)_3+3HNO_2\rightarrow Al(NO_2)_3+3H_2O[/tex]
According to above reaction ,when 1 mole of aluminum hydroxide reacts with 3 moles of nitrous acid it gives 1 mole of aluminum nitrite and 3 moles of water.
Hence, the correct answer is option a.
5C + 6O2 = ? What will be the product of molecules formed from this equation?
Answer:
5C + 6O₂ → 5CO + 7/2 O₂
Explanation:
According to the question the reaction is between carbon and oxygen molecule . The reactant side was given as 5 moles of carbon reacting with 6 moles of oxygen molecules. The chemical reaction between carbon and excess oxygen will form carbon dioxide but with limited oxygen it will form carbon monoxide.
Now let us write and balance the actual chemical equation as required from the question. In limited oxygen the reaction will be
The reactant said 5 moles of carbon which is 5 atoms of carbon reacting with 12 atoms of oxygen. The number of atoms of element on both sides of the chemical equation need to be balance . The balanced equation when oxygen is limited is written as
5C + 6O₂ → 5CO + 7/2 O₂
The product will be 5 moles of carbon monoxide and 3.5 moles of oxygen molecules(7 atoms) since the oxygen is limited . The carbon monoxide later reacts with more oxygen to form carbon dioxide.
Limiting reactant is the reactant that stops the reaction when it is completely consumed. The product of the given reaction is Carbon dioxide.
Balanced Reaction:
A reaction in which the number of moles of atoms in reactants is equal to the number of moles of the atoms in the product.
The given reaction,
[tex]\bold{5C + 6O_2 \rightarrow 5CO_2 \\\\}[/tex]
Carbon is a limiting reactant that reacts with 5 oxygen molecules. Oxygen is the excess reactant present in a large amount in the atmosphere. Hence only 5 molecules of Carbon dioxide will be produced.Therefore, the product of the given reaction is Carbon dioxide.
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what are the units of molality?
Answer:
M or mol/[tex]dm^{3}[/tex]
Explanation:
Answer:
Mol/kg
Explanation:
Ape-x
If you react 2.00 g of hydrogen completely using 15.87 g of oxygen to produce water, how much water (in grams) will you have?
WILL GIVE BRAINLIEST
Answer:
The amount (mass) of water we will have is 17.869 grams
Explanation:
The molar mass of hydrogen gas H₂ = 2.016 grams/mole
The molar mass of oxygen gas = 31.999 g/mol
Therefore, 2.00 g of hydrogen will give;
2.00/2.016 = 0.9921 moles of H₂ gas and
15.87 g of O₂ will give;
15.87/31.999 = 0.49595 moles
The reaction is as follows;
2H₂ (g) + O₂ (g) → 2H₂O (l)
Two moles of H₂ react with one mole of O₂ to produce two moles of H₂O
Therefore 0.9921 moles of H₂ will react with 0.9921/2 or 0.49595 moles of O₂ to produce 0.9921 moles of H₂O
From the above we note that all the H₂ and O₂ are completely consumed to form 0.9921 moles of H₂O
Molar mass of H₂O = 18.01528 g/mol
Number of moles = Mass/(Molar mass)
∴ Mass of H₂O = (Molar mass) × (Number of moles)
= 18.01528 g/mol × 0.9921 moles = 17.869 grams
Therefore the amount (mass) of water we will have = 17.869 grams.
A container has a total pressure of 1439 mmHg. There are 3 gases in this container, one has a pressure of 523.3 mm Hg, and another has a pressure of 509.8 mm Hg. What is the pressure of the 3rd gas?
Answer:
P₃ = 594.1 mmHg
Explanation:
Given data:
Total pressure of container = 1439 mmHg
Partial pressure of 1st gas = 523.3 mmHg
Partial pressure of 2nd gas = 509.8 mmHg
Partial pressure of 3rd gas = ?
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P(total) = P₁ + P₂ + P₃
439 mmHg = 523.3 mmHg + 509.8 mmHg + P₃
439 mmHg = 1033.1 mmHg + P₃
P₃ = 1033.1 mmHg -439 mmHg
P₃ = 594.1 mmHg
Responding to stimuli that are similar-but not identical-to a conditioned stimulus is called
a. spontaneous recovery
b. respondent reinforcement
c. stimulus discrimination
d. stimulus generalization
Answer:
d. stimulus generalization
Explanation:
Stimulus generalization consists of the appearance of the unconditional response to conditioned stimuli that had never been paired with it but that have a similarity to it.
If the sequence on the right hand side of the DNA molecule was TAGGCTA, the complementary side would have the sequence of what?
Answer:
ATCCGAT
Explanation:
A always matches with T
G always matches with C
an atom that has fewer neutrons than protons is called a
Answer:
Your answer is ANION
Consider the reaction below.
2 upper K plus upper B r subscript 2 right arrow 2 upper K superscript plus, plus 2 upper B r superscript minus.
What is being reduced?
only K
only Br2
both K and Br2
neither K nor Br2
Answer:
c
Explanation:
6) A volume of 473 mL of oxygen was collected at 27°C. What volume would the oxygen occupy at
173°C?
Answer : The volume of oxygen occupy at 173° would be, 703.2 mL
Explanation :
Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
where,
[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.
[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.
We are given:
[tex]V_1=473mL\\T_1=27^oC=(27+273)K=300K\\V_2=?\\T_2=173^oC=(173+273)K=446K[/tex]
Now put all the given values in above equation, we get:
[tex]\frac{473mL}{300K}=\frac{V_2}{446K}\\\\V_2=703.2mL[/tex]
Therefore, the volume of oxygen occupy at 173° would be, 703.2 mL
Oxygen, nitrogen, and argon gases are mixed in a sealed chamber. The pressure inside the chamber is 150.0 kPa. If the partial pressure of oxygen is 43.5 kPa and the partial pressure of nitrogen is 79.5 kPa, what is the partial pressure of argon?
Answer:
P(Ar) = 27 Kpa
Explanation:
Given data:
Total pressure of tire = 150.0 Kpa
Partial pressure of O₂ = 43.5 Kpa
Partial pressure of Ar = ?
Partial pressure of N₂ = 79.5 kPA
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P(total) = PO₂ + PN₂ + P(Ar)
150.0 Kpa = 43.5 Kpa + 79.5 Kpa + P(Ar)
150.0 Kpa = 123 Kpa + P(Ar)
P(Ar) = 150.0 Kpa - 123 Kpa
P(Ar) = 27 Kpa
Jonathan is working in his basement on a science fair project when his little sister closes and locks the door. Jonathan wants to let his parents know that he is stuck down in the basement. He can either yell as loudly as he can, bang on the metal pipes, or bang on the concrete wall. Which should he do if he wants someone to hear him? Explain your answer, and explain why the other options would not be as effective.
Answer:
he can bang metal pipes but i would rather say that he has to yell for help
Explanation:
why because the basement is very loud and echo so when is parents hear him they can run to basement and get him out
hope this helped
The specific characteristic of the metal is to emit a resonant sound when banged. Metals are sonorous, so, banging on the metal pipes can help Jonathan to let his parents know his condition, i.e., option B.
What are the properties of metal?Metals are materials that are lustrous, ductile, good conductors of heat and electricity, and malleable.
Other properties include the state of metals which are solids at room temperature except mercury and gallium, which is liquid at room temperature.
The property of sonority of metals can help Jonathan to let his parents know his condition.
Thus, the correct answer is B.
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A metal tank contains three gases: oxygen, helium and nitrogen. If the partial pressures of the three gases in the tank are 25 atm of oxygen, 12 atm of nitrogen and 15 atm of helium, what is the total pressure inside the tank
Answer:
52 atm
Explanation:
25 + 12 + 15 = 52 atm
- Please let me know you agree with this or if it is right or wrong. If wrong, I will fix it.
You computed the specific heat for each of the four metals using the formula below:
Check all items that you used, either directly or indirectly, each time you did this computation.
Answer: All of them are right there’s no wrong answer
Explanation:
Masses for the metal and the water in the calorimeter, temperature changes for the water and the metal, and the known specific heat of the water.
First, the masses of both the metal and the water within the calorimeter are crucial, as they determine the amount of substance undergoing the temperature change. Second, the temperature changes (Tw, final −Tw, initial and T metal, final −T metal, initial ) are necessary to quantify the heat exchange during the experiment. Lastly, the known specific heat of water (C water ) plays a role in the calculation, as it is a fundamental constant representing the amount of heat needed to raise the temperature of water.
The first law of thermodynamics, which states that the heat lost by the metal equals the heat gained by the water, and the ability of heat to flow from a hot object to a cooler one are overarching principles guiding the experimental setup and the interpretation of results. However, these principles are not directly inputted into the formula but are fundamental concepts in calorimetry and thermodynamics that inform the experimental design and the interpretation of the calculated specific heat values.
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