WHAT IS THE LIQUID THAT IS POURED FROM THE VESSEL WITHOUT DISTURBING THE SOLID CALLED?
Answers
The liquid that is poured from the vessel without disturbing the solid is called the supernatant. It is the clear liquid layer that sits on top of the solid or sediment after it has settled due to gravity or centrifugation.
The supernatant is separated from the solid or sediment because it has a lower density than the solid or sediment. The process of separating the liquid from the solid or sediment is called decantation. Decantation is a simple separation technique used in various fields, such as chemistry, biology, and environmental science. It is commonly used to separate mixtures of immiscible liquids, such as oil and water, or a solid and liquid, such as sand and water. To perform decantation, the mixture is left undisturbed for a period of time, allowing the solid or sediment to settle to the bottom of the container. The liquid is then carefully poured off, leaving the solid or sediment behind.
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Related Questions
in a typical reverse-phase lc procedure, decreasing the polarity of the mp will most likely have what effect on the peaks in the chromatogram? a. the plate height of the peaks will decrease b. tm for the system will increase c. the retention factors for all non-polar compounds will increase d. the resolution of the peaks will increase e. tm for the system will decrease f. the efficiency of the peaks will increase g. the retention times of the peaks will increase h. the retention times of the peaks will decrease
Answers
In a typical reverse-phase LC procedure, decreasing the polarity of the mobile phase will most likely have the following effects on the peaks in the chromatogram: The tm for the system will decrease, and the retention times of the peaks will increase. Option E, and G are correct.
When the polarity of the mobile phase decreases, the overall polarity of the system decreases as well, and the non-polar compounds will have a stronger affinity for the non-polar stationary phase, resulting in a decrease in tm. The retention times of the peaks will increase because the non-polar compounds will spend more time interacting with the non-polar stationary phase.
The other options are incorrect because: The plate height of the peaks will decrease: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The tm for the system will increase: This is the opposite of what happens when the polarity of the mobile phase decreases.
The retention factors for all non-polar compounds will increase: This is also the opposite of what happens when the polarity of the mobile phase decreases.
The resolution of the peaks will increase: This is not necessarily true and depends on the specific compounds being analyzed and the chromatographic conditions.
The efficiency of the peaks will increase: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The retention times of the peaks will decrease: This is the opposite of what happens when the polarity of the mobile phase decreases.
Hence, E. G. The tm for the system will decrease, the retention times of the peaks will increase is the correct option.
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Which transfers thermal energy in the same way the Suns energy is transferred to Earth?
A. The boiling water
B. The burner flame
C. The hot candle
D. The rising steam
Answers
Answer: I think this one is the boiling water
sorry if wrong
Explanation:
differentiate between edible and non edible mushroom
Answers
Edible mushrooms: Consuming edible mushrooms is safe and provides health advantages like fiber, vitamins, and minerals.
Examples: Button mushrooms.Non-Edible mushrooms: Mushrooms that cannot be eaten could be harmful or have unappealing flavors and textures that could be harmful if consumed.
Examples: Death Cap.
The measurement of the amount of matter in an object is its _______.
Answers
Mass is the answer because when i measure i do it with the matter of mass
Do you have more gravity when your on the ground or in the air
Answers
The gravity force on an object from the Earth is the same regardless of whether the object is surrounded by air .
the Earth has an average gravitational force. Different locations on Earth have gravitational forces that are larger or smaller than average. This is because each location has more or less mass than the average
please answer fast and correct. (15 points)
As the wavelength of a wave gets shorter, the frequency
:
stays the same
gets higher
gets lower
Answers
Answer:
the frequency with get lower
Answer:
its gets lower
Explanation:
What type of reaction take place when two or more substance combine to from a new substance?
Answers
Answer:
Synthesis reaction
Explanation:
A synthesis reaction, also known as a combination reaction, is a type of chemical reaction in which two or more substances react to form a new, more complex compound. This reaction involves the formation of a new chemical bond between the reactants, resulting in the creation of a new substance.
Answer:
Synthesis reaction
Explanation:
A synthesis reaction is a type of chemical reaction in which two or more simpler reactants combine to form a more complex product. The term "synthesis" is derived from the Greek word "syntithenai," which means "to put together." In a synthesis reaction, the reactants combine to form a new compound through the sharing of electrons between the atoms.
For example, the synthesis of water can be represented by the chemical equation:
2H + O2 -> 2H2O
In this reaction, two hydrogen atoms and one oxygen molecule combine to form two molecules of water. The electrons from the hydrogen atoms are shared with the oxygen atom to form covalent bonds, resulting in the formation of a new compound.
Synthesis reactions are important in many industrial processes, including the production of fertilizers, fuels, and pharmaceuticals, and play a crucial role in the formation of complex organic compounds in nature.
ALLEN
which type of leukocyte contains heparin, an anticoagulant?
Answers
The type of leukocyte (white blood cell) that contains heparin, an anticoagulant, is the Basophil.
Basophils are a type of granulocyte, characterized by the presence of granules in their cytoplasm. These granules contain various substances, including heparin, histamine, and other inflammatory mediators.
Heparin is an important anticoagulant that inhibits blood clotting. Basophils release heparin as part of their immune response to prevent excessive clotting and promote blood flow in areas of inflammation or injury.
Mast cells are tissue-resident cells that are similar to basophils and play a role in allergic reactions and inflammation. Both basophils and mast cells contribute to the release of heparin and other mediators in the immune response.
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Rutherford's scattering experiment demonstrated Question 2 options: the existence of protons. the existence of electrons. the existence of neutrons. that most of the mass of an atom is in its nucleus. that the charge-to-mass ratio of an electron is constant.
Answers
Rutherford's scattering experiment demonstrated that most of the mass of an atom is in its nucleus.
In Rutherford's famous experiment, a beam of alpha particles was directed at a thin gold foil. According to the prevailing model at the time, the plum pudding model, it was expected that the alpha particles would pass through the gold foil with only slight deflections. However, Rutherford's observations showed that some of the alpha particles were deflected at large angles and even bounced back.
From these results, Rutherford concluded that the positive charge and most of the mass of an atom were concentrated in a small, dense region called the nucleus. This discovery revolutionized the understanding of atomic structure and led to the development of the nuclear model of the atom. The experiment did not directly demonstrate the existence of protons, electrons, or neutrons, but it provided strong evidence for the presence of a positively charged nucleus.
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Calculate the freezing point of a solution containing 1.25 g1.25 g of benzene (C6H6)(C6H6) in 100 g100 g of chloroform (CHCl3)(CHCl3).
Answers
Freezing point of a solution containing 1.25 g1.25 g of benzene (C6H6)(C6H6) in 100 g100 g of chloroform (CHCl3)(CHCl3) is -64.249°C.
To register a frozen edge for a plan, you must use the recipe for frozen edges for discouragement.
ΔTf = Kf * molality
where ΔTf is the freezing edge for despair and Kf is the freezing edge for despair. As can be expected for soluble substances, molality is the molal mixture of solutes.
First we have to deal with the molality of the plan.
molality = moles of solute/mass of solute (kg)
The mass of chloroform is 100 g, which is equivalent to 0.1 kg.
molarity = 0.016 mol/0.1kg = 0.16 mol/kg
The reliable freezing point of chloroform for rejection of
is 4.68 K*kg/mol.
ΔTf = 4.68K*kg/mol * 0.16mol/kg = 0.749 K
The freezing limit of pure chloroform is 63.5°C. So the game plan frozen edge is frozen edge = - 63.5°C - 0.749°C = - 64.249°C
So the freezing point of the plan is -64.249°C.
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Non-ferrous metal is NOT hardenable by heat treatment; it must
gain strength through a process such as tempering. Is this
statement TRUE or FALSE?
Group of answer choices
True
False
Answers
The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.
Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.
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Which of the following observations would indicate that a material is a pure substance?
O It does not dissolve in water.
O It changes color after heating.
O It cannot be physically broken down into different types of atoms.
O It can be physically broken down into different types of molecules.
Answers
Answer:
C
Explanation:
Got it right on a test
In ecosystems, producers, consumers,
and decomposers are linked by their
roles in the recycling carbon and
Answers
Answer:
In ecosystems, the processes by which carbon and oxygen are recycled are linked. Producers, consumers, and decomposers play roles in recycling carbon and oxygen. ... When producers and consumers die, decomposers break down their remains and return carbon compounds to the soil.
Explanation:
hopes this helps D:
Answer:
oxygen
Explanation:
Producers, consumers, and decomposers play roles in recycling carbon and oxygen.
Hope this is enough to help!
Are halogens metals or nonmetals?
Answers
Answer:
Halogens. The halogen elements are a subset of the nonmetals. They comprise group 17 of the periodic table, from F through At. They generally very chemically reactive and are present in the environment as compounds rather than as pure elements.
Explanation:
Answer: They generally very chemically reactive and are present in the environment as compounds rather than as pure element
Explanation:
No
PLS HELP What is the value of x? (5 points)
A right angle is shown divided into two parts. The measure of one part of the right angle is 30 degrees. The measure of the other part is 4x
15
30
45
60
Answers
hopefully this helps
Pedro's book weighs 19/4 pounds. Blanca's book weighs 17/7 pounds. Use estimation to determine about how much more Perdro's book wweighs than Blanca's.
A 1lbs
Sorry I meant math.
B 2lbs
C 6lbs
D 7lbs
Answers
Answer:
2pounds
Explanation:
Given parameters:
Weight of Pedro's book = \(\frac{19}{4}\) pounds
Weight of Blanca's book = \(\frac{17}{7}\) pounds
Unknown:
How much more does Pedro's book weigh more than Bianca's book ?
Solution:
To Solve this problem, let us convert the fractions to decimal;
Weight of Pedro's book = 4.75 pounds
Weight of Bianca's book = 2.43 pounds
Differences = 4.75pounds - 2.43 pounds
= 2.32 pounds
Estimating gives 2pounds
Select the correct answer.
What is the ability to move body parts quickly with a significant amount of force?
A agility
B.
balance
power
OD. speed
Answers
Answer:
Power
Explanation:
#platofam
Imagine our class has discovered a new element and named it Berkmarium. Berkmarium is known to have 3 naturally occurring isotopes. In nature, 70% of the element is Berkmarium-95, 28% is Berkmarium-97, and 2% is Berkmarium-94. Which isotope will the average atomic mass of Berkmarum be closest to, and why? Support your answer with a calculation.
Answers
Answer:
Detail is given below.
Explanation:
Given data;
Abundance of Berkmarium-95 = 70%
Abundance of Berkmarium-97 = 28%
Abundance of Berkmarium-94 = 2%
Average atomic mass closer to which isotope = ?
Solution:
1st of all we will calculate the average atomic mass of Berkmarium.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (70×95)+(28×97)+(2×94) /100
Average atomic mass = 6650 + 2716+ 188 / 100
Average atomic mass= 9554 / 100
Average atomic mass = 95.54 amu
The average atomic mass is closer to the isotope Berkmarium-95 because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.
N2O4 ⇌ 2NO2
for the following reaction at 373 K, Kc = 0.36. If initial concentration of N2O4 is 0.1 mol dm^-3, what is the equilibrium concentration of NO2? (Is there a way to solve this without using quadratics?)
Answers
Okay, let's solve this step-by-step without using quadratics:
1) The equilibrium constant Kc = 0.36 means the equilibrium lies to the left. So there will be more N2O4 than NO2 at equilibrium.
2) The initial concentration of N2O4 is 0.1 mol dm^-3. Let's call this [N2O4]initial.
3) At equilibrium, the concentrations of N2O4 and NO2 will be [N2O4]equil and [NO2]equil respectively.
4) We know the equilibrium constant expression for this reaction is:
Kc = ([NO2]equil)^2 / [N2O4]equil
5) Setting this equal to 0.36 and plugging in 0.1 for [N2O4]initial, we get:
0.36 = ([NO2]equil)^2 / (0.1 - [NO2]equil)
6) Simplifying, we get:
0.036 = [NO2]equil^2
7) Taking the square root of both sides, we get:
[NO2]equil = 0.06 mol dm^-3
So the equilibrium concentration of NO2 is 0.06 mol dm^-3.
Let me know if you have any other questions! I can also provide a more step-by-step explanation if needed.
Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?
Answers
The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.
The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.
Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.
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The chemical equation below shows the combustion of propane.
C3H8 + O2 4H2O + 3 CO2
Use the chemical equation to complete the sentences by selecting a response from the drop-down menu.
1. The H20 is an example of a
2. The O2 is an example of a
3. The number 4 in front of H2O is an example of a
4. The number 8 in the
chemical formula C3H8 is an example of a
Answers
\(\\ \sf\longmapsto C_3H_8+O_2\longrightarrow 4H_2O+3CO_2\)
H_2O is an example of moleculeO_2 is also an moleculeNumber in front of H_2O means moles of H_2O molecule8 in the chemical formula C3H_8 is atoms of H presentWhat is the formula for the ionic compound containing sodium ions and nitride ions?A) NaN B) Na2N C) NNa2 D) Na3N E) NNa3
Answers
NNa3 is the formula for an ionic compound that included sodium ions or nitride ions.
Why are they referred to as ions?Depending upon if the quantity of electrons to an atom has greater or less than the amount of protons within that atom, an atom may acquire a positive or negative charge. When an atom attracts attention to another The atom because its electrons and protons are unequal, the atom is referred to as an ION.
What is the composition of sodium ion?An anode, the anode, separator, the electrolyte and two current enthusiasts one positive as well as one negative, comprise a sodium-ion battery. The sodium is stored in the anode and cathode, while the electrolyte acts in the form of circulating "blood" that retains the energy flowing.
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O=H-H
is an acid,
a base,
Or
neither an
acid nor a
base.
Answers
The given structure is of formaldehyde an organic compound and it is acidic in nature.
Why is acidic formaldehyde?The formic acid is transformed into formaldehyde when hydrogen is added. Because of this, ambient oxygen can more quickly convert formaldehyde into formic acid. In addition to most polar organic solvents, formic acid is miscible with water. Although formaldehyde is a weak acid (pK greater than 13), there was no reliable method to estimate and correct the base bound by formaldehyde because the base bound by wool was always identified by comparing the base present at equilibrium in aliquots of solutions that were identical except for the presence of wool in one of them.Formaldehyde is a combustible, colorless gas that is noticeable for its strong aroma when it is at ambient temperature. Oxomethane, methylaldehyde, oxymethyline, and methanal are some of its other names.For more information on formaldehyde kindly visit to
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Which is an important step in the alternate method for balancing equations in redox reactions?
A) indicating the types of bonds found in the molecules
B) determining the speed at which reactions take place
C) determining the half reactions of chemical equations
D) indicating the temperature at which the reaction occurs
Answers
Answer:
C.... - Determining the half reactions of chemical equations
Explanation:
Try It... -
Answer:
the answer is C
Explanation:
Cytokinesis happens differently for plant and animal cells. Both separate cytoplasm between two new daughter cells. However, which type of cell cytokinesis looks like a balloon being separated by a string being pulled tightly between them? Question 1 options: Animal Cell Cytokinesis Both Plant Cell cytokinesis Neither
Answers
Answer:
animal cell
Explanation:
Cytokinesis -
It refers to the process of cell division, which takes place during mitosis, is known as cytokinesis.
The process of cytokinesis is different for animal cell and plant cell.
Where, in case of plant cell, a separation, known as cell plate is formed along the center of the parent cell, which is responsible for the separation of the cells.Whereas, in case of animal cell, the plasma membrane contracts itself along the center, until the two daughter cells are separated from each other.Hence, from the given information of the question,
The correct answer is animal cell.
Por favor ayudenme con este ejercicio Una disolución de ácido sulfúrico de concentración 330 g/l tiene una densidad de 1,4 g/ml. ¿Cuánto vale su concentración en % en masa
Answers
Answer:
23.5 %
Explanation:
La fórmula del ácido sulfúrico es H₂SO₄, mientras que su masa molar es de 98 g/mol.
Siendo la densidad 1.4 g/mL, quiere decir que en 1 mL de solución tenemos 1.4 g de solución. Como la concentración es de 330 g/L entendemos que la solución contiene 330 gramos de soluto en 1L de solución.
Entonces en 1000 mL de solución (lo que equivale a 1 litro), tendremos:
1.4 g/mL = masa de solución / 1000 mL
masa de solución = 1.4 g/mL . 1000 mL = 1400 g
Como % en masa es la concentración que define la masa de soluto en 100 gramos de solución, para esta solución de H₂SO₄ es:
(330 g / 1400 g) . 100 = 23.5 %
A voltaic cell is constructed in which the following cell reaction occurs. the half-cell compartments are connected by a salt bridge. ag (aq) cr2 (aq) ag(s) cr3 (aq)
Answers
The cell reaction is Ag(aq) + Cr3+(aq) → Ag(s) + Cr2+(aq). The standard cell potential is 0.742 V.
A voltaic cell is a device that utilizes a spontaneous chemical reaction to generate electricity. A half-cell is a component of the voltaic cell that contains either an oxidizing or reducing agent.
The salt bridge is used to connect the two half-cells and prevent mixing of the solutions.The given cell reaction is Ag(aq) + Cr3+(aq) → Ag(s) + Cr2+(aq).
This reaction takes place in two half-cells.
In one half-cell, Ag is oxidized to Ag+.
In the other half-cell, Cr3+ is reduced to Cr2+.
The cell potential, Ecell, can be calculated using the Nernst equation:
Ecell = E°cell - (RT/nF)
lnQwhere E°cell is the standard cell potential,
R is the gas constant,
T is temperature in kelvin,
n is the number of electrons transferred in the reaction,
F is the Faraday constant, and
Q is the reaction quotient.
The standard cell potential for the given cell reaction is 0.742 V.
Therefore, the cell generates 0.742 volts of electrical potential difference.
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2) A student determined the melting point of a substance to be 55.2DC. If the accepted value
is 50.1C, what is the percent error in the student's determination?
A) 12.0 B) 5.10 C) 10.2 D) 9.24
Answers
Answer:
C) 10.2
Explanation:
Formula: Actual-Expected/Expected
The actual was 55.2 while the expected was 50.1
55.2-50.1/50.1=0.101796407 * 100= 10.2%
The percentage error in the student's determination is 10.2%
The correct answer to the question is Option C. 10.2
From the question given above, the following data were obtained:
Measured value = 55.2 °C
Accepted value = 50.1 °C
Percentage error =?Next, we shall determine the absolute error. This can be obtained as follow:
Measured value = 55.2 °C
Accepted value = 50.1 °C
Absolute error =?Absolute error = |Measured – Accepted|
Absolute error = |55.2 – 50.1|
Absolute error = 5.1Finally, we shall determine the percentage error.
Absolute error = 5.1 °C
Accepted value = 50.1 °C
Percentage error =?\(Percentage error = \frac{Absolute error }{Accepted value} * 100\\\\= \frac{5.1}{50.1} * 100\\\\\)
Percentage error = 10.2%Therefore, the percentage error in the student's determination is 10.2%.
The correct answer to the question is Option C. 10.2
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Which description justifies why the theory of evolution is a theory and not a law? (4 points)
a
Explains how organisms change in response to the environment
b
Predicts which organism is best suited to the environment
c
Supported by a small amount of empirical evidence
d
With more evidence, it will become a law
Answers
Which particle has an electronic structure of 2.8.8?
Answers
Answer:
argon has an element structure of 2.8.8
Answer:
Argon
Explanation:
Argon has a electron configuration of 2.8.8. This shows an octate state, meaning that it has no lose pair of electrons. It has a total of 18 electrons on its shell