Answer:
The oxidation number of hydrogen changes in the reaction 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g).
We want to identify a change in the oxidation number of hydrogen. We will consider that:
The oxidation number of H in most compounds is +1.
The oxidation number of H in H₂ is 0.
The oxidation number of H in metal hydrides is -1.
In which reaction does the oxidation number of hydrogen change?
2 HClO₄(aq) + CaCO₃(s) → Ca(ClO₄)₂(aq) + H₂O(l) + CO₂(g)
NO. The oxidation number of H in HClO₄ and H₂O is +1.
CaO(s) + H₂O(l) → Ca(OH)₂(s)
NO. The oxidation number of H in H₂O and Ca(OH)₂ is +1.
HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)
NO. The oxidation number of H in HCl and H₂O is +1.
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)
YES. The oxidation number of H in H₂O is +1 whereas in H₂ is 0.
SO₂(g) + H₂O(l) → H₂SO₃(aq)
NO. The oxidation number of H in H₂O and H₂SO₃ is +1.
The oxidation number of hydrogen changes in the reaction 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g).
Explanation:
identify at least five (5) pure substances found in nature in the supermarket
A fossil of an organism that lived during only one time is found in only one kind of rock layer, or stratum. If two strata contain the same index fossil, a geologist will know they are part of the same layer. Question 10 options: True False
Answer: True
Explanation:
I took the test and I got it right
Hope this helps!
which of the following is not a heterogeneous mixture
Answer:
apples juice, salad oil, salt water
Explanation:
Which liquid mixture can have the particles be seen and easily separated by settling or filtration
Answer:
A Suspension
Explanation:
our deep faith in god was adopted from the portuguese
Answer:
I remember this question and yes it is
Explanation:
I remembered it
un alambre de telefono de 120 m de largo y de 2.2 mm de diámetro
Answer:
a telephone wire 120 m long and 2.2 mm in diameter
Explanation:
the following are the advantages of partnership except one
Which religion is being described in this passage? "Followers of the native religion of Japan believe that all things in nature have spirits called kami, which the followers honor with shrines." Question 9 options: Buddhism Christianity Hinduism Shintoism
Shintoism
Shintoism originated in Japan and was created to distinguish it from Buddhism and Confucianism which had been introduced from China, the Shinto religon is polytheistic and revolves around the kami, supernatural entities believed to inhabit all things. The link between the kami and the natural world has led to Shinto being considered animistic and pantheistic.
what ensures the integrity and security of data that are passing over a network
Answer:
Networking-security protocol
Which of the following expressions are equivalent to this expression: –1(0) = ? –1[4 (–4)] –1[4 (4)] 1 [4 (–4)] –1[-4 (–4)]
Answer: A) –1[4 + (–4)]
Explanation:
what is an opposing claim in an informational text?
Answer:
An argument that is made in order to contradict the argument made by the author.
analyze the free-body diagrams (fbds) and place them in the indicated order according to the magnitudes of their net forces.
The order of the free-body diagrams (fbds) according to the magnitudes of their net forces are FBD 2, FBD1, FBD 4, and FBD 3.
This is evident based on the analysis described below:
FBD 1:
A = -30i + 40j;
B = 20j;
C = 20i + 10j;
D = -50j;
R = A + B + C + D;
R = -10i + 20j;
|R| = √ 10² + 20² => 22.36 N
FBD 2:
E = -40i;
F = 40i + 50j;
G = -50j;
R = E + F +G => 0;
|R| = 0 N
FBD 3:
H = -20i + 50j;
I = 60i + 10j;
R = H + I => 40i + 60j;
|R| = √ 40² + 60² = 72.11 N.
FBD 4:
J = -50i +30j;
K = 10i + 40j;
L = 50i + 10j;
M = -10i - 10j;
N = 10i - 50j;
R = J + K + L + M + N
R = 10i + 20j;
|R| = √ 10² + 20² = 22.36 N
Hence, in this case, it is concluded rust FBD 1 and FBD 4 are the same since they have a net force of 22.36N.
Therefore the lowest net force is FDB 2 and the highest net force is FDB 3.
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Teri goes shopping for some new clothes and then out to lunch with a friend. She spends $32.94 on some shirts, $15.89 for a belt and $19.99 each for two dresses that are on sale. For lunch, Teri has a salad that is $6.95, iced tea for $1.49 and dessert for $3.49. Teri pays 7% sales tax on both her shopping items and lunch. She tips her server 15%. How much has Teri spent all total for the day? a. $121.52 b. $109.58 c. $107.79 d. $88.19 Please select the best answer from the choices provided A B C D
Answer:
B.) $109.58
Explanation:
Source: quizlet
Slide/Card #7 gives you the answer
Answer:
B
Explanation:
To which part of the plot does this passage belong? the exposition the rising action the climax the resolution
This passage of Hamlet belongs to the climax. The rising action section of the plot leads up to the climax.
Hamlet 'The Tragedy of Hamlet, Prince of Denmark' is the most important history written by William Shakespeare.In the tragedy of Hamlet, the ghost appears to Hamlet and indicates Hamlet to revenge his murder.In the tragedy history, Hamlet delayed this revenge by pretending to be mad.Learn more about Hamlet here:
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Answer:
the answer is B. the rising action
Explanation:
im jus dat ni ni fr
this organ is surrounded by a series of tunes that are used for transport of oxygen. what do we normally call these transport tubes?
These transport tubes are what we call lungs.
The human lungs are a component of the body. They are internal organs that are useful for the respiratory processes.
They help to transport oxygen in the body. They are usually divided into different sections.
We have the right lung and the left lung. The right lung is the one that is slightly largetr than the left one.
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an amino acid is to a protein as a glucose molecule is to
Answer:
cabohydrate
Explanation:
Who is owner of space x
Answer:
Elon Reeve MuskExplanation:
HOPE IT HELPS U!!!!Answer:
Elon Musk is the owner of space x.
Explanation:
He is the CEO of space x.His real name is Elon Reeve Musk.He is from Pretoria, South Africa.How does the soldier describe the rat infestation in the trenches? Check all that apply. The rats were numerous. The rats were easy to kill off. The rats ate the soldiers’ food. The rats were very unpleasant. The rats were smaller than normal.
Answer:
How does the soldier describe the rat infestation in the trenches? Check all that apply.
The rats were numerous. <<<CORRECT The rats were easy to kill off. The rats ate the soldiers’ food.<<<CORRECT The rats were very unpleasant.<<<CORRECT The rats were smaller than normal.
Explanation:
Oct. 2021 EDGE
The rats were numerous, The rats ate the soldiers’ food and The rats were very unpleasant are the soldier describe the rat infestation in the trenches. Hence, options A, C and D are correct.
What is rat infestation?Rodents are drawn to cluttered spaces because they frequently use cardboard, paper, cloth, cotton, insulation, and any other item that can be molded, gnawed, or shredded as nesting materials to make a safe, out-of-the-way home.
These signs of a rat or mouse infestation include: Rodents may leave their droppings under the sink, in cupboards or drawers, or near food packages. materials for nesting, such as paper, fabric, or dried plant matter.
The rat is the spirit animal of success and restlessness. As a totem or spirit animal, it might stand for discomfort. It serves to emphasize the value of business knowledge.
Thus, options A, C and D are correct.
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deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars every day. although the actual process also requires water, a simplified equation (with rust shown as fe2o3) is:
Rusting is a very expensive process to humans and is represented by the simplified equation of: 4Fe + 3O₂ → 2Fe₂O₃ .
At the basic level, rust occurs when iron comes into contact with air (oxygen) and they both react to form Iron Oxide which is the chemical name for rust.
The equation is:
Iron + Oxygen → Iron Oxide
4Fe + 3O₂ → 2Fe₂O₃
In conclusion, the simplified equation for rust is 4Fe + 3O₂ → 2Fe₂O₃.
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How did the philosophers of the Enlightenment view the relationship between government and the governed? as mutually beneficial for people and government as more beneficial to the government as more beneficial to the people governed as not at all beneficial to either group
Answer:
A) as mutually beneficial for people and government
Explanation:
Answer:
as mutually beneficial for people and government
Explanation:
just took the test
You can use fixative spray to protect a
drawing
clay sculpture
photograph
recycled sculpture
Answer:
drawing
Explanation:
Who is the acting floor leader and most powerful member of the Senate? the Sergeant at Arms the Majority Party Whip the Senate Majority Leader the President of the Senate
The most powerful member of the senate who is also the acting floor leader who endorses bills is the president of the senate
The president of the senate is the head of the legislative arm of government as he presides on the senate sitting and endorses the bills being deliberated on by the senate members. The majority party whip, Majority leader and others are all inferior to the senate in hierarchy and they all report to the president of the senate house.Therefore, president of the senate could be seen as the third in command after, the president and vice president.
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Answer:
the Senate Majority Leader
Explanation:
i took the test ;)
What brought about the formation of the Republican Party? The Kansas-Nebraska Act The Missouri Compromise The Emancipation Proclamation The election of Abraham Lincoln
Answer:The Kansas-Nebraska Act
Explanation: I did the test
Answer: The Kansas-Nebraska Act
Explanation:
which of the following are considered prokaryotic organisms? select all that apply.
when convergent plates collide, if both plates are pushed upward, this forms
thank you guys for brainily
Answer:
Hiiii
Explanation:
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_________ people were used as indentured servants and/or slaves in the Caribbean. Question 12 options: Chinese Indian Native American All the above
Answer:
All of the above
Explanation:
What is the weather like in the savanna biome? (Site 1)
Answer:
The savanna biome experiences long, dry winters and wet, humid summers, with the majority of precipitation falling during the summer months.
Explanation:
which statement correctly explains why h2s is a stronger acid than water
Answer:
Sulfur (S) has a larger atomic size than oxygen (O), so H2S is a more stable, weaker base than H2O.
Sulfur (S) has a larger atomic size than oxygen (O), so H, 2, S, , is a more stable, weaker base than H, 2, O.
Sulfur (S) has a larger atomic size than oxygen (O), so H2S is a more stable, stronger acid than H2O.
Sulfur (S) has a larger atomic size than oxygen (O), so H, 2, S, , is a more stable, stronger acid than H, 2, O.
Sulfur (S) has a larger atomic size than oxygen (O), so HS– is a more stable, weaker base than OH–.
Sulfur (S) has a larger atomic size than oxygen (O), so HS, – , is a more stable, weaker base than OH, –, .
Sulfur (S) has a larger atomic size than oxygen (O), so HS– is a more stable, stronger acid than OH–.
I think the answer is the third one
It easily dissociates into ions in solution, releasing more hydrogen ions (H+). Therefore option A is correct.
[tex]\rm H_2S[/tex] (hydrogen sulfide) is a stronger acid than water because it readily undergoes dissociation in water to release hydrogen ions (H+).
This dissociation increases the concentration of H+ ions in the solution, leading to a lower pH value and stronger acidity. In contrast, water ([tex]\rm H_2O[/tex]) dissociates only to a small extent, resulting in a relatively lower concentration of H+ ions.
Therefore, [tex]\rm H_2S[/tex]'s ability to release more H+ ions makes it a stronger acid compared to water.
Therefore option A is correct.
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Your question is incomplete, but most probably your full question was.
Which statement correctly explains why h2s is a stronger acid than water
A. It easily dissociates into ions in solution.
B. It forms stronger hydrogen bonds with other molecules.
C. It has a higher boiling point than water.
D. It has a lower molecular weight than water.
consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have. (a) draw several diagrams to illustrate the situation, some short boxes with large bases and some tall boxes with small bases. find the volumes of several such boxes. (b) draw a diagram illustrating the general situation. let x denote the length of the side of the square being cut out. let y denote the length of the base. (c) write an expression for the volume v in terms of both x and y.
The largest volume that the box can have is two cubic feet.
(a) Please see the attached graph created with MS Excel that show the variation of volume with the side length of the square cut out.(b) Please find attached the diagram created with MS Visio, illustrating the general situation. (c) The expression for the volume v in terms of both x and y is V = y²·x.Reasons:
Given parameters are;
The side length of the box = 3 ft.
x represents the side of the cut square, we have;
Height of the box = x
Width of the box, y = 3 - 2·x
length of the box, y = 3 - 2·x
The volume of the box, V = y²·x
Therefore; V = (3 - 2·x)²·x = 4·x³ - 12·x² + 9·x
At the largest volume, we have;
[tex]\dfrac{dV}{dx} = \dfrac{d}{dx} \left(4 \cdot x^3 - 12 \cdot x^2 + 9 \cdot x\right) = 12 \cdot x^2 - 24 \cdot x + 9 = 0[/tex]
Which gives;
4·x² - 8·x + 3 = 0
[tex]x = \dfrac{3}{2}[/tex], or [tex]x = \dfrac{1}{2}[/tex]
The value, [tex]x = \dfrac{3}{2}[/tex], gives the minimum volume of the box, given that [tex]\dfrac{3}{2}[/tex] is half the length of the cardboard, therefore;
y = 3 - 2·x
We get;
[tex]y = 3 - 2 \times \dfrac{3}{2} = 3 - 3 = 0[/tex]
Which gives;
[tex]V = 4 \cdot \left(\dfrac{1}{2} \right)^3 - 12 \cdot \left(\dfrac{1}{2} \right)^2 + 9 \cdot \left(\dfrac{1}{2} \right) = 2[/tex]
The largest volume that the box can have, [tex]V_{max}[/tex] is 2 ft.³
(a) The volume of boxes with their height, (side length of square being cut out) x are plotted on the attached graph.
(b) Please find attached the drawings representing the general situation.
(c) From the question analysis, we have;
The volume of the box in terms of x and y is V = y²·x
The volume of the box in terms of x only is V = 4·x³ - 12·x² + 9·x
The volume of the box in terms of y only is [tex]V = y^2 \times \left(\dfrac{3 - y}{2} \right)[/tex]
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