Answer:
7. none of the above
A student is testing two clear liquids. one liquid is water that has been modified to have a basic ph. the other liquid is a sports drink that contains added electrolytes, including na+(aq). how can the student use the equilibrium reaction of sodium chloride to determine which liquid is which? in three to five sentences, explain your answer.
The student can use the sodium chloride equation to determine which liquid is which. The equation is:
NaCl(s) ⇄ Na+(aq) + Cl–(aq)What is Le Châtelier's principle?It is the act of causing a disturbance in a chemical equilibrium system, which moves in the direction of canceling the disturbance and adjusting to reach a new equilibrium.
So if you add sodium chloride to a drink, the electrolyte goes to the left, if you add more water, it migrates to the right, so the student can determine each liquid effectively.
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If p(x)=2x^3-3x+5 what is the remainder of p(x)/(x-5)
Answer:
Since the last term in the resulting expression is a fraction, the numerator of the fraction is the remainder.
240
Physicists estimate that the number of stars in the universe
Identify the oxidation numbers for all the elements in the reactants and products for 2mno4−(aq)+3s2−(aq)+4h2o(l)→3s(s)+2mno2(s)+8oh−(aq)
The oxidation number if eah of the elements is as follows;
Oxidation number of Mn is + 7 on the right hand side and +4 on the right hand sideOxidation number if hydrogen is +1 on both sidesThe oxidation number of oxygen is -2 on both sidesThe oxidation number of sulfur is -2 on the lefthand side and zero on the right hand side.What is a redox reaction?A redox reaction is one in which there is a change in the oxidation number of the reactants from left to right.
Let us now consider the oxidation number of each element from left to right;
Oxidation number of Mn is + 7 on the right hand side and +4 on the right hand sideOxidation number if hydrogen is +1 on both sidesThe oxidation number of oxygen is -2 on both sidesThe oxidation number of sulfur is -2 on the lefthand side and zero on the right hand side.Learn more about oxidation number: https://brainly.com/question/15167411?
Mike is hanging a string of lights on his barn for a square dance
Alexis is trying to partition segment ab in the ratio 2:3 using a compass. select the step that is missing in his process.
The process that Alexis should use to partition segment ab in the ratio 2:3 using a compass is; As detailed below
How to partition a Line Segment?To divide a line segment in 2:3 using compass, the steps that alexis has to follow these steps:
1) Draw any ray aₓ which makes an acute angle with segment ab.
2) Locate points a₁, a₂, a₃, a₄, a₅ on the ray aₓ such that aa₁, a₁a₂, a₂a₃, a₃a₄ and a₄a₅ are equal, with the aid of a compass.
3) Since alexis has to divide the line in ratio of 2:3, then the ray aₓ is divided into 5 equal parts.
4) Join the point b with the point a₅
5) From the point a₂, draw a line parallel to ba₅ and this can be drawn by making an angle equal to ∠aa₅b
6) Now, consider that the line that is drawn parallel to ba₅ intersect the given line ab at the point c.
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Evaluate the expression under the given conditions. cos(2theta); sin(theta) = − 5 13 , theta in quadrant iii
The value of the given trigonometric expression which is cos 2θ under the 3rd quadrant is; -119/169
What is the value of the trigoneometric ratio?We are given the trigonometric ratio;
sin θ = -⁵/₁₃
From trigonometric identities, we know that;
cos 2θ = 1 - 2sin²θ
Thus;
cos 2θ = 1 - 2(-⁵/₁₃)²
cos 2θ = 1 - 2(25/169)
cos 2θ = 119/169
since cos θ is negative in the third quadrant, then we have;l
cos 2θ = -119/169
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What is the measure of each interior angle of a regular decagon brainly
Nico has conducted an observational study to learn about how different personal experiences affect car purchases. nico surveyed 300 new car buyers at the auto mall and found that 75% of the buyers were shopping for the same model of a car they have owned before. what conclusion can nico make from his study?
The conclusion of the given study is that; There may be a link between .... but he cannot draw a cause-and-effect conclusion from an observational study.
What is the conclusion of the study?We are told that;
Number of new cars Nico surveyed = 300
Percentage of buyers that surveyed the new cars = 75% .
Thus, number of customers surveying this cars = 75% * 300 = 225 customers
If people are satisfied with their car's current company and brand and model,it means that they can also prefer the same thing again for the same better experience. Thus, the conclusion is that;
There may be a link between owning a model of a car and buying that model again, but he cannot draw a cause-and-effect conclusion from an observational study.
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You are given a sample of metal and asked to determine its specific heat. you weigh the sample and find that its weight is 28.4 n. you carefully add 1.25 x 104 j of heat energy to the sample and find that its temperature rises to 18.0 °c. what is the sample’s specific heat?
The specific heat of the given sample of metal is 14.32 J/kg.K.
What is the Specific heat of a sample?The specific heat of a sample is the amount of heat needed or required to raise the temperature of that sample by 1K. It is given by the formula:
Q = mCΔT
where;
Q = Heat transferredm = Mass of the substanceC = Specific heat ΔT= Change in temperature.Recall that:
weight of a substance = mass × gravity
mass = 28.4 N/ 9.8 m/s²mass = 3 N/m/s² = 3 kgFrom the equation:
Q = mCΔT
[tex]\mathbf{C = \dfrac{1.25 \times 10^4 \ J}{3 \ Kg \times 291 \ K }}}[/tex]
C = 14.32 J/kg.K
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The standard form of the equation of a circle is (x−3)2+(y−1)2=16. what is the general form of the equation?
Answer:
x=3 y=1
Explanation:
x-3=0 y-1=0
x=3 y=1
(3-3)2+(1-1)=16
Answer:
Hello! Really really sorry I am alte! Hope this helps though! Have a nice day! And really helpful for k12 users!
Explanation:
What is the name of the place on a solid where two faces meet brainly
which of the following is/are contained within the spermatic cord?
Answer:
The spermatic cord contains the ductus deferens (vas deferens), the testicular artery and the pampiniform plexus of veins. Other structures in the cord are the cremasteric artery, the artery to the vas, nerve to the cremaster, sympathetic nerves and the lymphatics of the testis and epididymis.
Explanation:
The spermatic cord contains the ductus deferens (vas deferens), the testicular artery and the pampiniform plexus of veins. Other structures in the cord are the cremasteric artery, the artery to the vas, nerve to the cremaster, sympathetic nerves and the lymphatics of the testis and epididymis.
What is the name for a spermatic cord vein abnormal dilation?
A varicocele is an abnormal enlargement and tortuosity of the spermatic cord veins. Although varicoceles are frequently discovered during routine physical examinations and are common in the general population, they are the most frequently treatable cause of male factor infertility.
In the veins located in the scrotum, directly above the testicles, it is thought that varicoceles are brought on by faulty valves. These valves typically control how much blood is sent to and received from the testicles. Blood backs up when normal flow doesn't happen, which causes the veins to enlarge.
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Which technique would most probably involve using a magna brush to detect a latent print? a. carbon powder dusting b. ninhydrin exposure c. iron powder dusting d. silver nitrate exposure e. superglue fuming
Answer:
A: Carbon Powder dusting
Explanation:
An artistic technique in which carbon dust is applied to a prepared surface via dry brushes.
What do you think the word ""usurpations"" means? what impact did this view of king george iii’s rule have on the form of government that emerged from the declaration of independence? use evidence from the text to support your answer.
Answer:
The definition of usurpations is; an act of usurping; wrongful or illegal encroachment.
Explanation: i hope this helped
All of the following are examples of postsecondary education except
Answer:
Answer is B. Military service
Explanation:
Answer is B. Military service
Which three items should a user remember when rating digital information
The three items a user remember when rating digital information are
Accuracy, Distribtion and Information
Digital Information Rating
Digital Ratings give us information about an idea of its content consumption by estimating
audience outreach, frequency and tme spent on digital contenet gross rating point (GRP).When rating any digital information, it is important to rememnber
Accuracy : This determines the quality of the informationDistrribution: This determines its sustainabilityInformation: This determines its relevancelearn more on digital Rating here:https://brainly.com/question/24152511
State four reasons why knowing the entry requirements is important
Answer:
to avoid any mistakes
to make sure you are not breaking any rules
to make sure your information is rendered valid
to follow the procedures
Explanation:
.
gettysburg national military park museum and visitor center
Subshells half-filled with electrons are particularly stable. can you suggest a possible physical basis for this claim?
The physical basis for this claim is that all orbitals need to have like one electron at least to hinder repulsion by the action of pairing of element.
What the ways that electrons are filled in Subshells?Shells and subshells are known to be filled in the level of energy order, and as such, electrons need to fill the 4s subshell before they can be able to fill 3d shell.
Note that Orbitals are often and singly filled by electrons and can double up only when all orbitals has like one electron to hinder repulsion by the action of pairing of element.
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Aster sells used cars. she earns no base pay, but is paid a commission of 25% for each car sold which can be modeled by the equation y = 0.25x, where x represents the total dollar amount of car sales. what is the meaning of the x-intercept in the equation? a) aster's percentage of the sales b) amount of earned raised with no sales c) used car company's percentage of sales d) amount of sales when no money has been earned
Using the given proportional relationship, it is found that the meaning of the x-intercept in the equation is given by:
d) amount of sales when no money has been earned
What is a proportional relationship?A proportional relationship is a function in which the output variable is given by the input variable multiplied by a constant of proportionality, that is:
y = kx
In which k is the constant of proportionality.
In this problem, the relationship is:
y = 0.25x.
In which y is the amount of money earned on x sales.
The x-intercept is the value of x when y = 0, that is, the value of x when no money has been earned, hence option d is correct.
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A masked allele in the genotype that is only expressed when 2 of the same masked alleles are inherited
A masked allele in the genotype that is only expressed when 2 of the same masked alleles are inherited is called recessive trait.
What is a trait?A trait can be defined as a distinguishing quality (characteristic) of a living organism. Thus, it refers to the specific features and characteristics that are possessed by a living organism.
According to Genetics, traits are essentially divided into two (2) and these include:
Dominant traits.Recessive traits.In conclusion, a recessive trait typically refers to a masked allele in the genotype (h0m0zygous) that is only expressed by a living organism when two (2) of the same masked alleles are inherited.
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Glencoe algebra 1 standardized test practice answer key
An example of Glencoe algebra 1 standardized test is simply 9a² + 7a + 4a² + 2a.
What is Glencoe Algebra 1 about?This is known to be a type of Textbook that is a Series. Its aim is to link math content and produce a set of adaptive instruction for students to succeed in algebra.
In the simplification of 9a² + 7a + 4a² 2a. you add like terms together.
Therefore, the answer will be 13a² + 9a
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Describe the energy conversions that occur as a microwave oven heats a cup of water
The conversions are:
Electrical to electromagnetic and mechanical (when we turn on the microwave).
Electromagnetic to thermal (as the microwave heats up the cup of water).
What energy conversions occur?
We will describe the process in which you already have a cup of water inside the microwave.
First, you turn on the microwave. Here you are giving the microwave electrical energy so it can work.
The microwave rotates the cup of water, so there is a transformation of electric energy into mechanical energy.
The microwave also creates electromagnetic radiation which affects the cup, so there is a change from electric energy to electromagnetic energy.
This electromagnetic energy interacts with the water by increasing the temperature, so finally we have a change from electromagnetic energy to thermal energy.
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What kind of trapezoid can be inscribed in a circle
Answer:
Tangential trapezoid
Explanation:
hope this helped :)
Using your own words, describe the characteristics of stalin’s rule in one sentence.
A perfect characterisation of Stalin's rule is that the rule is regimented and total under strict control.
Stalin's RuleUnder the Stallin's Rule, the peopl however enjoyed some benefits with regards to what happened to American during the great depression despite the Unlawful use of power under Stallin. Recreation then was basically sports and education is somewhat like flip learning, you have to learn from the media on your own.
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In the summer, the arctic fox appears brown because its cells produce a dark pigment. however, in the winter, the arctic fox appears white because the dark pigment is not produced. the color change is most likely due to the effect of
Answer:
To camouflage
Explanation:
This trait was selected for because it led to better survival. In the winter the foxes would be white and blend in with the snow to hide from predators and in the summer they become darker to better blend in with the summer environment.
A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.4 s later. if the speed of sound is 340m/s how high is the cliff?
Fundamentals of algebra practice book grade 7 answer key
Algebraic expressions are represented with numbers and variables
The algebraic expression of "5 more than twice a number" is 5 + 2x
How to solve the algebraic expression?From the complete question, we have the following statement:
"5 more than twice a number"
5 more than means 5 +
Twice a number means 2x, where x is the number
When both expressions are brought together, we have:
5 + 2x
Hence, the algebraic expression is 5 + 2x
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Which of these gases must not be exposed to oil or grease
Answer:
nitro is the answer i think