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:
After training for two weeks, the athlete gets stronger and can apply more force to the weight. If he can now push the weight 100 meters in 74 seconds, what is his average speed, in meters per second, rounded to the nearest hundredth?
1.35 m/s, is his average speed, in meters per second, rounded to the nearest hundredth.
What is distance?Distance is the measurement of a physical separation between two objects. The sum of the paths between two points is the “distance traveled.” the length from the beginning position to the final point of Speed is the distance covered in a given amount of time. That portion of motion that cannot be zero is the distance.
According to the given the case was the situated of the average speed. The athlete weight 100 meters.
The athlete weight in 74 seconds.
The average speed = ?
Average speed = distance/time Average speed = 100 m/74sAverage speed = 1.35 m/sAs a result, the 1.35 m/s, is his average speed, in meters per second, rounded to the nearest hundredth.
Learn more about on distance, here:
https://brainly.com/question/15172156
#SPJ2
which of the following statements about the 3-x-3 writing process is most accurate?
Answer:
Prewriting Writing Revising
Explanation:
3x3 writing process is a 3 steps writing process. These three steps of writing are further divided into three sub-steps. The three steps in this writing process are: Prewriting Writing Revising
Decide whether the sentence is correct or incorrect as written. Gerardo te tú compra la cena. correct incorrect
Answer: it’s incorrect
Explanation:
Because it should be Gerardo tu’ compra la cena.
Answer: incorrect
Explanation:
Consider the chemical equation. CuCl2 2NaNO3 Right arrow. Cu(NO3)2 2NaCl What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100.. 49.7% 58.4% 63.6% 78.7%
Answer:
D. 78.7% on edge 2020
Explanation:
i got 100
The percent yield of NaCl is 78.7 %
CuCl₂ + 2NaNO₃ → Cu(NO₃)₂ + 2NaCl
How NaNO₃ is determined to be in excess?If the NaNO₃ is determined to be in excess, the limiting reagent is the chloride. We convert the mass to moles:
31 g . 1mol / 134.45g = 0.230 moles
Ratio is 1:2, so we can make a rule of three to determine the theoretical yield
1 mol of copper (II) chloride reacts to produce 2 moles of sodium chloride.
Then you can find out how much NaCl 31.0g of CuCl₂ should produce using stoichiometry. Divide 31.0g by the molar mass of CuCl₂ (134.446g/mol) to get 0.2306mol CuCl₂. Than multiply 0.2306mol CuCl₂ by 2 to get 0.4612mol NaCl.
Than multiply 0.4612mol by the molar mass of NaCl (58.45g/mol) to get 26.95g of NaCl.
that means that 100% yield would give you 26.95g of NaCl so to find percent yield divide 21.2 by 26.95 to get 0.7867 which is 78.7% yield
Then, 0.230 moles of CuCl₂ will react to produce (0.230 .2) /1 ) = 0.461 moles of NaCl → we convert the moles to mass → 0.461 mol . 58.45 g / 1mol = 26.9 g
To find percent yield we do → (Yield produced / Theoretical yield) . 100
(21.2 g / 26.9 g) . 100 = 78.7 %
Learn more about chloride on:
https://brainly.com/question/32108518
#SPJ7
among the functions of contemporary art which in your view is most significant
Let understand that Contemporary art means the serious of art which are produced by artists in this current or modern time
In Ancient times, painting and Sculpture was the major form of art that was embraced and widely practiced..Today, Contemporary art is more than painting or sculptures, its does encompasses architecture, poetry, music, literature, dance etc
Contemporary art provides the people the opportunities to reflect on what are important to them and the world at large.
In conclusion, the most significant function of this Art is its ability to provoke deep thoughts about any causes in the real world.
Read more about Contemporary Art here
brainly.com/question/17684958
Who does Washington blame for the introduction of slavery in the US? the white Southerners the general government no one
Answer:
C, No one
Explanation
Answer:
C
Explanation:
Gib da check
Who was the only person thought to have done all they could do to prevent the full tragedy of the Titanic? Question 5 options: the staff of the Californian Captain Rostron of the Carpathia first operator Phillips of the Titanic Captain Smith of the Titanic
Captain Smith is the person who could have prevent the full tragedy of the Titanic.
The British Naval officer who navigate the Atlantic ocean with the Titanic ship was Captain Edward Smith.
En route the journey from Southampton,England to New York City, United States, the great disaster happened to the ship when its stuck an iceberg on high speed which result to inflow of water into the vessel.However, the Captain could have prevented the tragedy by moving the ship at low speed which will buy them time to spot the huge iceberg in the dark hours.In conclusion, the correct answer is E because Captain Smith of the Titanic was in charge of the Ship.
Read more about this here
brainly.com/question/1460312
chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.
Explanation:
Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction. The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series
Answer the following question in 3-4 complete sentences. Picture 1: A black and white scene showing men on horseback and men standing in a field. Picture 2: An engraving of an owl in a tree. What method was used to create each image above? Compare and Contrast the two examples above. Provide at least 3 observations.
Picture 1 was likely created using the linocut technique, while picture 2 is the result of wood engraving. These two techniques are both techniques to create images but they differ in their characteristics.
Linocut technique, also known as lino printing, involves using a sheet of linoleum and creating figures on this by cutting shapes with a sharp object. The characteristics of the resulting images are:
Black and white imagesSimple images with some reliefVintage appearanceWood engraving technique is a very traditional technique that involves creating images into a block of wood by using specialized cutting tools such as burins. The characteristics of the resulting images are:
Black and white imagesVery detailed imagesImages with some reliefBased on this, both techniques are used to create black and white images but the characteristics of the images produced and the process of creating these are different.
Learn more in: https://brainly.com/question/6562038
Answer: Picture 1 is an example of a linocut. Picture 2 is an example of a wood engraving. Observations may vary, but could include the following: Picture 1 has a lot of dark values, bold lines, and non-detailed images. With picture 1, there is either black or white, and the values are created by the thickness of the lines. With picture 2, the values change based on the detail of the engraving and the amount of ink applied. Picture 2 includes a lot of details and is a realistic portrayal of the subject (owl). The subjects in both pictures are visible and definable. Picture on is of a bull ring, with Spanish matadors and picture 2 is of an owl in a tree. Neither picture uses color.
Explanation:
The guy above is wrong. this will get you 100 percent on test
Which graph represents the polynomial function f(x)=x3 4x2−4x−16?
Answer:
its the bottom left graph
Explanation:
it's the bottom left graph is the graph represents the polynomial function f(x)=x3 4x2−4x−16.
What is a polynomial function?In an equation such as the quadratic equation, cubic equation, etc., a polynomial function is a function that only uses non-negative integer powers or only positive integer exponents of a variable. For instance, the polynomial 2x+5 has an exponent of 1.
f(x) = anxn + anxn+1 +... + a2x2 + a1x + a0 is the formula for a polynomial. The greatest power of x in an expression is the mathematical function's degree. Polynomials of degree 0, 1, 2, 3, and 4 are constant (non-zero) polynomials, linear polynomials, quadratics, cubics, and quartics, respectively.
When two or more algebraic terms are added, subtracted, or multiplied (no division! ), the result is a mathematical expression known as a polynomial. The majority of the time, polynomial expressions contain at least one variable.
Thus, it's the bottom left graph.
For more information about polynomial function, click here:
https://brainly.com/question/12976257
#SPJ5
In the era of the Seven Years War and the French Revolution, European nations, such as France, faced many of the same issues as those faced by the colonies in the American Revolution. Which problem affected both nations? colonial rules government-mandated social classes taxation without representation tyrannical monarchies in power
The problem that affected both populations is the fact that they had tyrannical monarchies in power
It should be noted that the issue that was faced by European nations such as France was the fact that they had tyrannical monarchs.
They had leaders who had excess powers. Such a leader is unrestricted by law and rules the people unfairly. A tyrannical leader is also harsh as cruel.
The tyrannical monarchs made the people pay more taxes and also treated the people unfairly.
Read related link on:
https://brainly.com/question/17127000
Answer:tyrannical monarchies in power
Explanation: i got it right
This satirical lithograph, published by Currier and Ives in New York in 1869, comments on the feminist movement. A satirical lithograph titled "The Age of Brass." It shows woman standing in line to vote for another woman. A sign next to the female candidate reads, "Vote for the celebrated man tamer." A woman is scolding her husband, who is holding a baby. Which statement most likely represents the point of view of Currier and Ives? Women should be allowed to vote because they dress better than men. Women should not be allowed to vote because gender roles will be reversed. Women should not be allowed to vote because more women will go to the polls than men. Women should be allowed to vote because it will force men to act more responsibly.
The statement most likely represents the point of view of Currier and Ives, Women should not be allowed to voters because gender roles will be reversed. Thus, option (B) is correct.
What are voters?The term voting is a method that a group, such as a meeting or an electorate, can exercise in order to make a socialistic decision or express an opinion, usually following communications, debates, or election campaigns. Ideologies elect holders of high office by voting. Residents of a place.
His satirical lithograph, published by Currier and Ives in New York in 1869, comments on the feminist movement. A satirical lithograph titled The statement most likely represents the point of view of Currier and Ives, Women should not be allowed to voters because gender roles will be reversed.
Therefore, Thus, option (B) is correct.
Learn more about voters here:
https://brainly.com/question/28341923
#SPJ5
Answer:
Women should not be allowed to vote because gender roles will be reversed.
Explanation:
The answer above is correct.
which answer choice is a result of the lincoln-douglas debates?
Yan is climbing down a ladder. Each time he descends 4 rungs on the ladder, he stops to see how much farther he has to go. If Yan made 8 stops with no extra steps, which expression best shows another way to write the product of the number of ladder rungs that Yan climbed? 4 4 4 4 8 8 8 8 (Negative 1) (4 4 4 4) (Negative 8) (negative 8) (negative 8) (negative 8)
Answer:
a
Explanation:
got an 100 on my test
Select the words and phrases that best develop a positive tone toward Guapo in the passage below. I a cat named Guapo. He is always our neighborhood, looking for delicious bits of food that people have out. Because Guapo is a very active cat who lives outdoors, he has a very body.
The words and phrases that best develop a positive tone toward Guapo in the passage are:
take care ofexploringleftslenderI take care of a cat named Guapo. He is always exploring our neighborhood, looking for delicious bits of left food that people have out. Because Guapo is a very active cat who lives outdoors, he has a very slender body
A phrase is commonly defined as a group of two or more words that work hand in hand but don't form a clause.Example "Yellow popcorn”. it is not a full sentence and does not make a complete sense.
Positive tones are simply nice lovely and kind tones people use in communicating with people.
Conclusively Guapo is being referred to in the short passage with the use of positive tones.
Learn more from
https://brainly.com/question/18526898
Select the words and phrases that best develop a positive tone toward Guapo in the passage below.
I ✔ take care of a cat named Guapo. He is always ✔ exploring our neighborhood, looking for delicious bits of food that people have ✔ left out. Because Guapo is a very active cat who lives outdoors, he has a very ✔ slender
body.
Change in diet, sleep patterns, and routine are all __________ signs of stress. A. physical B. emotional C. cognitive D. behavioral Please select the best answer from the choices provided. A B C D
Answer:
D. behavioral
Explanation:
Got it right on Edge
Change in diet, sleep patterns, and routine are all behavioral signs of stress. The correct option is D.
What is stress?Any kind of change that puts physical, mental, or psychological strain on a person is considered to be stressful.
Your body's reaction to anything that demands focus or action is stress. Everyone goes through periods of stress.
When we feel pressured or threatened, we respond by becoming stressed. It typically occurs when we are in a precarious position that we don't feel we have any control over.
When we feel stressed, it may be due to: A person, for instance, having numerous obligations that they are finding difficult to handle.
Psychological stress is avoiding activities, experiencing sleep issues, having trouble finishing tasks, pacing, trembling, tensing up, clenching their fists, sobbing, or altering their eating, smoking, or drinking habits are all signs of stress.
Thus, the correct option is D.
For more details regarding stress, visit:
https://brainly.com/question/25632718
#SPJ6
Which statement is characteristic of a communist system? Choose four answers. The government controls the means of production. Prices and wages are set by supply and demand. The government regulates a centrally planned economy. Entrepreneurs are encouraged to take risks. Prices and wages are set by the government. Businesses are free to follow their own best interests. A single authoritarian party holds complete power.
Answer:
The government controls the means of production.
The government regulates a centrally planned economy.
Prices and wages are set by the government.
A single authoritarian party holds complete power.
Explanation:
A/1, C/3, E/5, G/7
_________ 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:
the difference between the words starving and hungry
A confounding variable can also be considered an extraneous variable. Please select the best answer from the choices provided T F
Answer: true
Explanation:
at what letter does the ball have the greatest kinetic energy
Answer:
The velocity of the Ball increase as it falls, which means that the ball attains it's greatest velocity, and thus it's greatest kinetic energy,at E
What was the capital of the Ottoman Empire? Question 3 options: Istanbul Isfahan Persia Constantinople
Answer:
The answer to your question is Istanbul
the use of collective pronouns ('we' and 'us') in countries like china or south korea reflects a cultural emphasis on which of the following values?
what ensures the integrity and security of data that are passing over a network
Answer:
Networking-security protocol
Culture shock is the fear or anxiety people feel when encountering cultures that are unfamiliar. Please select the best answer from the choices provided T F
Answer:
The answer is TRUE
Explanation:
Answer:
T
Explanation:
Select the correct answer. Which of these is a form of authoritarian government in which power is typically handed down through family lines and rulers stay in power for life? A. oligarchy B. monarchy C. republic D. plutocracy E. theocracy
Answer:
b
Explanation:
Monarchy is a form of authoritarian government in which power is typically handed down through family lines and rulers stay in power for life. The correct option is B.
Thus, A monarchy is a type of authoritarian administration in which the state is ruled by a single individual who is frequently referred to as a king, queen, or emperor.
In a monarchy, authority is normally passed down through a single family line, and kings and queens are in charge forever, until they abdicate or are overthrown in some other way.
Monarchies can range in their level of absolute power from those that are absolute, where the king has unrestrained power, to those that are constitutional, where the ruler's authority is constrained by a constitution or laws.
Thus, Monarchy is a form of authoritarian government in which power is typically handed down through family lines and rulers stay in power for life. The correct option is B.
Learn more about Monarchy, refer to the link:
https://brainly.com/question/30711729
#SPJ7
which of the following phrases best describes ethnocentrism
Answer:
what are the phrases??????????
Based on the passage, how can repetition be used to learn and retain a speech?
Answer:
Your 5 senses help you remember things so by saying the speech writing it down and reading it will help you remember it after going over it for a while
Explanation: I got a 100 on this
A graph shows the Total Public Debt of the U S Government from 1993 to 2013 with Year on the x-axis and Total public debt in trillions of U S dollars on the y-axis, from 0 to 20 in increments of 5. The debt stays constant from 1993 to 2001 and then steadily increases. The graph shows the federal debt between 1993 and 2013. What trend about the federal debt does the graph reveal? It is increasing. It has leveled off. It is decreasing. It has not changed.
Answer:
it is increasing so the first answer is correct
Explanation:
:)
trend about the federal debt does the graph reveal is increasing. Thus option A is correct.
What are the features of graph ?A graph is represented as pictorial form the of data or numeric values in an organized manner which enables user to represent large amount of data in visual form.
There are 2 types of questions and the features of graphs are interpretation of given graphs or selecting a graph based on a verbal description.
The bar graphs are the most common type of graph, other graphs are dot plots, histograms, line graphs and scatterplots.
A Bar Graph is represented as the graphical display of data using rectangular bars of different parameters like heights, The structure can be represented in the y axis contains values, and the x axis contains categories or time periods.
A dot plot is a simple graphical representation which shows the frequency with which items appears in a data set and present data on the x axis.
For more details graph, visit
https://brainly.com/question/8660394
#SPJ2
which of the following best describes a negative consequence of the amazon basin deforestation
The Amazon basin is the name given to the popular Brazil's Rain-forest which spans across many countries and covers about 35.5% of the South American continent.
The Rain-forest plays a major role in regulation of the world's oxygen and carbon cycles because its produces about 6% of world's oxygen and also act as carbon sink from the atmosphere.
The deforestation of the Amazon basin could have a great consequence for the world because production of oxygen from the forest will stop and concentration of carbon in the atmosphere will increase and likely to increase global warming.
Learn more about Amazon basin here
brainly.com/question/9552655
brainly.com/question/20238331
