Answer: A) The amount of product measured after a reaction
A statement which best defines the actual yield of a reaction is "The amount of product measured after a reaction" Hence, Option (A) is correct
What is yield of any reaction?Yield of any chemical reaction gives idea about the amount of product that is produced by the chemical reaction between reactants.
Actual yield gives idea about the how much yield of any product will be produced in the given chemical reaction by using the stoichiometry of the reaction.
Therefore, A statement which best defines the actual yield of a reaction is "The amount of product measured after a reaction" Hence, Option (A) is correct
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how do I find the slope of this graph? Is it even possible?
Answer:
Not exactly But you can take the slope of the curved portion and the slope of the flatline.
It wont do you much good since your working for absorbance but if you ever see something like a temperature change you can use the slope(s) to find freezing points/melting
Explanation:
If you need to submit a slope you could use a best fit which is just point to point or you could break it up like i mentioned
Which statement describes steps involved in the production of hydroelectric power?
A. Falling water turns a turbine that helps generate electricity.
B. Moving water turns a paddle wheel that helps generate electricity.
C. Water falls down a pipe to generate electricity.
D. Potential energy of water is directly transformed into electrical energy.
There are six elements that are common to all
Answer:
earth air water
Explanation:
Form hypothesis: Which factor(s) do you think determine whether the car breaks the egg?
The mass of the car only _____
The kinetic energy of the car ____
The speed of the car only ___
The momentum of the car ___
(GIZMOS)
How many moles are contained in 7.88 x 10^24 atoms of Iron
Answer:
1.31 × 10^47
Explanation:
1 mol of Fe =
[tex]1 \: mol \: of \ fe = 6.02 \times 10 ^{23} \ \\ x \: mol \: offe \: = 7.88 \times {10}^{24} \\ \\ \\ so \: 7.88 \times {10}^{24} \div 6.02 \times {10}^{23} \\ \\ x = 1.31 \times {10}^{47} [/tex]
How many atoms of which elements are represented by the following formula?
C6H12N
Answer:
19 atoms
Explanation:
6 carbon, 12 hydrogen, one Nitrogen
How many moles is 17.6 g NaOH?
Answer: The answer is 39.99711.
Explanation:
How many grams NaOH in 1 mol? The answer is 39.99711.
We assume you are converting between grams NaOH and mole.
You can view more details on each measurement unit:
molecular weight of NaOH or mol
This compound is also known as Sodium Hydroxide.
The SI base unit for amount of substance is the mole.
1 grams NaOH is equal to 0.025001806380511 mole.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between grams NaOH and mole.
Type in your own numbers in the form to convert the units!
Convert another chemical substance
Convert grams
NaOH
to moles
Quick conversion chart of grams NaOH to mol
1 grams NaOH to mol = 0.025 mol
10 grams NaOH to mol = 0.25002 mol
20 grams NaOH to mol = 0.50004 mol
30 grams NaOH to mol = 0.75005 mol
40 grams NaOH to mol = 1.00007 mol
50 grams NaOH to mol = 1.25009 mol
100 grams NaOH to mol = 2.50018 mol
200 grams NaOH to mol = 5.00036 mol
Subscripts are the big numbers written to the left of a chemical formula in a chemical equation
True or false
Answer:
Most probably it's true.
Draw the structure of the product formed in the reaction of an epoxide with ethoxide ion. If more than one stereochemical product is possible, draw only one isomer.
Answer:
See explanation and image attached
Explanation:
The most common reaction of epoxide rings is the ring opening reaction. This ring opening reaction serves to relieve the stress in the ring.
Now, The first step in the acid catalysed epoxide ring opening reaction is the protonation of the epoxide.
This is now followed by the attack of the nucleophile. Subsequent deprotonation regenerates the acid catalyst and yields the product.
The structure of the product formed in the reaction of an epoxide with ethoxide ion is attached below as we get 2 substituted alcohol product.
What are epoxides?Epoxides are comes under the category of ether, which are the three membered ring structure.
Due to its ring structure, strain or stress is present in the three membered ring which makes it available to react easily with nucleophile. Ethoxide ion acts as a nucleophile in this reaction which attacks on the electrophilic carbon of the epoxide and resulting into the break up of bond and opening of ring.
As a result of this reaction we get the 2 substituted alcohol as attached in the image.
Hence structure of the product is attached below.
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What does each daughter cell get from their parent cell?
Experimental value of acceleration due to gravity is found to be
9.842 m/s2. The accepted value of acceleration due to
gravity is 9.81 m/s2. What is the percent error in calculation?
Answer:
0.33%
Explanation:
From the question given above, the following data were obtained:
Experimental value = 9.842 m/s²
Accepted value = 9.81 m/s²
Percentage error =?
The percentage error in the calculation can be obtained as follow:
Percentage error = |Experimental – Accepted| / Accepted value × 100
Percentage error = |9.842 – 9.81| / 9.81 × 100
Percentage error = 0.032 / 9.81 × 100
Percentage error = 0.33%
Therefore, the error in the calculation is 0.33%
What is the change in enthalpy for a reaction if the reactants have 270 kJ of energy and the products have 150 kJ of energy
Answer-150 kj
Explanation:
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You are counting red blood cells, which objective will be best to count the number of cells, high power or low power objective and why?
Can someone please HELP MEEEE
Answer:
Low power
Explanation:
Low power would allow for the full image of the red blood cells and would appear as small circles.
How many atoms is 45 moles of silicon (Si)?
Ap LSCHpnGKIASAJQSMZc4qoidborFmvFig/USHTVPBWHqozowvg Viewo
8. Two or more forces that cancel each other out are*
A:Net forces
B:balanced forces
C:Unbalanced forces
D:Normal force
Answer:
Balance and Unbalanced.
Which of the following elements is a gas at room temperature?
Answer:
hydrogen, nitrogen, oxygen, fluorine, chlorine
An athlete can run 4 m/s. How far can she run in 3 minutes?
Answer:
720
Explanation:
4 m/s
60 seconds
= 180 seconds
3 minutes
4 m/s
= 720 m/s
180 seconds
1 point
5. A drug or other chemical compound whose manufacture, distribution,
possession, and use is regulated by the legal system is referred to as a
poison.
a.poison
b. narcotic
c. toxin
d. controlled substance
I'm pretty sure its D because if it's manufactured and distributed its likely not toxin or poison. a narcotic could be a controlled substance so that's why I'm leaning towards D
What property of water is primary for living organisms? (SC.6.E.7.4) *
1 point
It is odorless.
It does not conduct electricity.
It is tasteless
It is liquid at most temperatures on Earth.
Answer:
It is liquid at most temperatures on Earth.
List 3 metals that could replace lead in the compound Pb(NO3)2 in a single replacement reaction.
Answer:
AKWIJKNZQSOKQPALQALQPALALQLLKILILI
I have to write the balanced equation
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the
molecules move around each other
What change did the scientist observe in the substance?
A. Before, the substance was a liquid. Later, it was a solld.
B. Before, the substance was a gas, Later, it was a liquid
ООО
C. Before, the substance was a liquid. Later, it was a gas.
D. Before, the substance was
solid. Later, it was a liquid
The change scientist observed has been that before the substance was in gaseous state, and later it was in liquid state. Thus, option B is correct.
The particles in the different state of the sample has been moving with varying speed and have varying interatomic interactions. The interactions have been changed with the change in the state of matter.
In the solid state, the structure of particles has been very compact, and the particles do not have a particular movement.The liquid sample has been constituted of the sample particles with lesser interatomic interactions. The particles move more freely compared to the solid, around each other.The gaseous particles have been constituted of the least interatomic particle's interaction. The particles are present at a distant and move away from each other.The sample with the scientist has prior movement of the molecules away from each other. Thus, the substance has been present in the gaseous state. The later movement of the samples has been around each other, thus the molecules has been in a liquid state.
The change scientist observed for the substance has been from gaseous state to liquid state. Thus, option B is correct.
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Kito puts his spoon into a helping of fresh, hot, mashed potatoes as shown in the figure. Which process takes place when the two objects come together
A. The temperature of the spoon increases, but its thermal energy does not change
B. Energy in the form of heat is transferred from the warmer mashed potatoes to the cooler spoon
C. The thermal energy of both the mashed potatoes and the spoon increases as energy in the form of heat is transferred between them
(please answer quickly, I don't want to fail this test due to being stuck on this one)
Answer:
B. is the answer
Explanation:
Energy in form of heat is transferred from the warmer mashed potatoes to the cooler spoon.
When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: sodium chloride (aq) silver nitrate (aq) silver chloride (s) sodium nitrate (aq)
Answer:
1 on each compound there
Explanation:
A balanced reaction is a reaction that has the same number of atoms in the reactants and products. If this number is not the same, we need to balance it putting some numbers as coefficients behind the compound or element that needs to be balanced, For example:
NH₃ ------> N₂ + H₂
As you can see in this reaction, we have 1 nitrogen and 3 hydrogens in the reactants, and in the side of products we have 2 of each element. This needs to be balanced. To do this we put a number as coeffcient to balance the atoms. In this case, we can put a number 2 behind the NH₃, so the number of atoms of nitrogen becomes 2:
2NH₃ ------> N₂ + H₂
But this 2, changes the number of hydrogens, we now have 6 (cause 2 * 3 = 6), so, let's balance hydrogen on the products to be 6, putting a 3:
2NH₃ ------> N₂ + 3H₂
Now, the reaction is balanced in each side of the reaction.
Applying the same principle to the reaction of this exercise we have the following:
NaCl(aq) + AgNO₃(aq) ---------> AgCl(s) + NaNO₃(aq)
As you can see, we have the same number of atoms on each side:
Na: 1; Cl: 1; Ag: 1; N: 1; O: 3
So we don't need to balance this reaction, with just putting the number 1 or none, is perfectly balanced.
Hope this helps
In this case you have unlimited iron, but only 6.40 moles of oxygen (O2). How much Fe2O3 can you produce?
Answer: 682 grams
Explanation:
The balanced chemical reaction is:
[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
[tex]O_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Fe[/tex] is the excess reagent.
According to stoichiometry :
3 moles of [tex]O_2[/tex] produce = 2 moles of [tex]Fe_2O_3[/tex]
Thus 6.40 moles of [tex]O_2[/tex] will produce=[tex]\frac{2}{3}\times 6.40=4.27moles[/tex] of [tex]Fe_2O_3[/tex]
Mass of [tex]Fe_2O_3=moles\times {\text {Molar mass}}=4.27moles\times 159.69g/mol=682g[/tex]
Thus 682 g of [tex]Fe_2O_3[/tex] will be produced from 6.40 moles of oxygen
2. Explain in your own words what will happen to the chemical structure of aspirin when it is in solution at pH 1.0. Compare this to what will happen to the chemical structure of aspirin at pH 8.0. Highlight your answers by drawing appropriate chemical structures for aspirin at each of the pH values.
Answer:
don't sent such messages whatever you are
According to the concept of solubility and dissociation, aspirin at pH 8 and 10 undergoes dissociation to yield ions.
What are ions?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions are generated on dissociation.
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What volume would 4.32x1023 atoms of Krypton gas occupy at STP?
Write the formula of the conjugate base of the Brønsted-Lowry acid, HIO3
Answer:
Explanation:
A conjugate base of HIO3 is IO3– ion
The chemical formula of the conjugate base of the Bronsted Lowry acid HIO₃ can be represented as IO₃⁻.
What is Bronsted - Lowry acid and bases?According to Bronsted - Lowry theory, acid is a substance that donates a proton or H⁺ ion and forms its conjugate base while the base is a substance that accepts a proton or H⁺ ion and forms its conjugate acid.
Bronsted-Lowry acid donates a proton to the other compound and forms a conjugate base.
Acid ⇄ Conjugate base + Proton
If a conjugate base accepts a proton back then acid reforms.
The Bronsted-Lowry base is a substance that accepts a proton from other compounds.
Base + Proton ⇄ Conjugate acid
If a conjugated acid donates its proton then the base reforms.
The conjugate base of the Bronsted-Lowry acid HIO₃ is:
HIO₃ ⇄ H⁺ + IO₃⁻
Therefore, the conjugate base of the Bronsted-Lowry acid HIO₃ is IO₃⁻.
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why are oxidation numbers assigned to the elements before writing a chemical formula
Answer:
Oxidation numbers assign ownership of the electrons to one atom or another in a compound. ... Scientists use these numbers to help name compounds, write formulas and balance chemical equations. They are also useful when studying reactions and they can help you identify when something is oxidized or reduced.
1. What is the purpose of the lab?
2. What is your hypothesis for this experiment?
3. What methods are you using to test this hypothesis?
Outline the steps of the procedure in full sentences.
Section II: Data and Analysis
4. What graphs would clearly represent the trends in your data?
Your Student Guide includes information on which graphs to construct. Each graph should have the following items:
a. An appropriate title
b. Appropriate labels for each axis
c. An appropriate scale for each axis
d. The correct units for the data
Complete a rough sketch of each graph.
5. What do the data in your graphs tell you?
Explain in one or two sentences what trend is shown in each of your graphs.
Section III: Conclusions
6. What do the data tell you about your hypothesis?
State how your hypothesis is either supported OR refuted by the data.
7. How do the data support your claim above?
Explain your statement above. Be sure to refer to specific pieces of data from your experiment that support your argument.
8. If you could repeat the experiment and make it better, what would you do differently and why?
There are always ways that experiments can be improved. Now that you are a veteran of this experiment and have experience with the procedure, offer some advice to the next scientist about what you suggest and why.
Answer:
1)To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.
2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.
3)Specify the Null Hypothesis.
Specify the Alternative Hypothesis.
Set the Significance Level.
Calculate the Test Statistic and Corresponding P-Value.
Drawing a Conclusion.
4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.
5)
Answer:
To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.
2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.
3)Specify the Null Hypothesis.
Specify the Alternative Hypothesis.
Set the Significance Level.
Calculate the Test Statistic and Corresponding P-Value.
Drawing a Conclusion.
4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.
Explanation:
To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.
2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.
3)Specify the Null Hypothesis.
Specify the Alternative Hypothesis.
Set the Significance Level.
Calculate the Test Statistic and Corresponding P-Value.
Drawing a Conclusion.
4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.