Mendeleev developed the periodic table, the element gallium had not yet been discovered because gallium has known biological value
There is a very close match lies between the gallium actual property and the properties that were predicted and this has helped a lot in gaining a wider acceptance periodic table of Mendeleev and he left blank spaces for the undiscovered element atomic masses 44 scandium 68 gallium 72 germanium and 100 techtanium and so certain element can be grouped together
The element has no known biological value and in nature gallium is never found as a free element and cannot be found in substantial amount in any minerals and the element which were unknown when Mendeleev gave his classification were geranium gallium and scandium and he left gap for the unknown element and gallium has the atomic number is 31 and atomic mass is 69.72
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Does the total number of molecules on each side of the equation have to be balanced? why or why not?.
No, the number of total molecules on the left side of a balanced equation is not equal to the number of total molecules on the right side of the equation. A molecule is the smallest number of atoms bonded together for a chemical reaction. The total number of atoms must be the same, but not molecules.
An equation in chemistry is what?The reactants and products of a chemical reaction are denoted by their corresponding chemical formulae in a chemical equation, which represents the reaction symbolically.
Example: Water is created when hydrogen and oxygen combine to make [tex]2H_{2} + O_{2} --- > 2H_{2}O[/tex]
What factor is most important while balancing chemical equations?To satisfy the law of conservation of mass, which states that the "Total mass of the products is equal to the Total mass of all the reactants," is the most crucial aspect in balancing chemical equations.
What takes place when a chemical equation is out of balance?The law of conservation of mass will be broken by an unbalanced chemical equation. If it does, it will suggest that mass is either created or destroyed, which is not feasible.
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What are amino acids and proteins known as?.
These amino acids are arranged in a long chain and joined to one another by covalent peptide bonds to form proteins (Figure 3-1). Polypeptides are another name for proteins.
Describe amino acids in simple terms.Amino acids are the building blocks of proteins .Proteins and amino are the basic constituents of all living things. Amines are result of the digestive or breakdown of proteins. The human body uses amino acids to make proteins that help with food dissection.
What amino acid is beneficial to you?The benefits of amino acids for many body processes are numerous. You need amino acids for a variety of functions, including food digestion, strengthening soft tissues, supplying energy, and more. It's crucial to consume enough amino acids.
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A weak acid indicator hin is blue while its conjugate base in- is green. ka,in for the indicator is 2.3 x 10^-5 over what ph range does the indicator change color? lower ph upper ph what is the [h ] in a solution with ph
The indication of blue color in pH paper means the solution is basic. And green colour represents a neutral solution. The [H+] indicates the hydrogen ion concentration of the solution.
What is pH?pH of a solution is the measure of H+ ion concentration in a solution. This indicates the acidity or basicity of a solution. Mathematically pH is the negative logarithm of H+ ion concentration.
A pH of 7 indicates the solution is neutral. A pH more than 7 is basic and the pH below 7 is acidic. Acidic solution gives red-yellow colour in pH scale in a range of 1- 6. The green colour indicates neutral pH of 7.Blue colour indicates basic solutions with a pH range of 8-14.
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What causes soil damage and loss?
Answer:
Mosty Oil but it depends there is lots of things that can damage soil
Explanation:
Answer:
Sheet erosion by water, wind erosion, and rill erosion
the heat of vaporization for ethanol is 0.826 kj/g . calculate the heat energy in joules required to boil 50.95 g of ethanol.
Boiling ethanol requires 77.77 kJ of heat energy in joules.
How much is heat of vaporization?The amount of heat (540 cal/g) required to vaporize one gram of water into one gram of water vapor is known as the heat of vaporization or condensation.
The given parameters:
ethanol's heat of vaporization is equal to 0.826 kJ/g of its mass, which is 94.15 g.
The following formula is used to determine how many joules of heat are needed to boil the ethanol:
Q = 94.15 x 0.826
Q = 77.77 kJ
As a result, 77.77 kJ of heat energy are needed to boil the ethanol.
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Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two metals?
Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove. Option D
What is the periodic table?The periodic table has to do with an arrangement of the elements in their order of reactivity. We know that the periodic table is arranged in groups and periods. The groups are the vertical portions while the periods are the horizontal portions.
Given that the reactivity would depend on the position of an element in the periodic table, we would look at where the elements that are to be considered are found in the periodic table.
We know that the elements that occur down the group for the metals are more reactive because they are more shielded thus they leave the attractive force of the nucleus much more easily.
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Missing parts;
Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two different metals? Barium (Ba) is less reactive than calcium (Ca) because the valence electrons in calcium atoms are farther from the nuclei and harder to remove. Strontium (Sr) is more reactive than magnesium (Mg) because the valence electrons in strontium atoms are farther from the nuclei and harder to remove. Rubidium (Rb) is more reactive than sodium (Na) because the valence electrons in sodium atoms are closer to the nuclei and easier to remove. Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove.
In order for a solute to dissolve in water, the solute particles must be ____ attracted to water molecules.
In order for a solute to dissolve in water the solute particles must be strongly attracted to water molecules.
What does it mean to have strong bonds with water molecules in order to get dissolve in solvent?Having strong bond with water means the solute is completely and more properly dissolve in the water.Here the question is asked about the solute to dissolve in water , the solute particles must be attracted strongly or weakly to water molecules.The answer would be in order for a solute to dissolve in water the solute particles must be strongly attracted to water molecules.The phenomena of solute dissolving in solvent is called dissolution and the whole phenomena is within two ingredients that is solute and solvent .The solute and solvent together forms the solution and the solution is viscous when the amount of solute dissolved would be more and the solute bond with the solvent must be strong.To know more about molecule visit:
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when 0.538 g of sodium metal is added to an excess of hydrochloric acid, 5590 j of heat are produced. what is the enthalpy of the reaction as written?
Enthalpy of the reaction is 238.88 kJ/ mol.
What is the enthalpy of the reaction?
The change in enthalpy that takes place during a chemical reaction at constant pressure is known as the Heat of Reaction (also known as the Enthalpy of Reaction). It is a helpful thermodynamic unit of measurement for determining how much energy per mole is emitted or created during a reaction.
Given mass of sodium = 0.538 g
The reaction is,
Na(s)+HCl(aq)→NaCl(aq)+12H2+Δ(heat)
number of moles of sodium = given mass / molar mass
number of moles of sodium = 0.538 g / 22.99 g/mol
number of moles of sodium = 0.0234 mol
enthalpy of the reaction ΔH∘rxn = 5590J/ 0.0234 mol
enthalpy of the reaction ΔH∘rxn = 238.88 kJ/ mol
Hence, enthalpy of the reaction is 238.88 kJ/ mol
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how would you expect the pressure of a gas to change if suddenly the intermolecular forces were repulsive rather than attractive? how would you expect the pressure of a gas to change if suddenly the intermolecular forces were repulsive rather than attractive? increase decrease remain the same
If the intermolecular forces of a gas is repulsive rather than it is attractive, then the pressure of the gas is increased.
According to the Boyle's law, product PV is constant at any temperature. So, the increase in pressure of the gas decreases the volume of a gas because molecules come closed together. When the gas is compressed, gas molecules are coming in each other's way, which gives rise to a strong repulsive force. The intermolecular force in the molecule is repulsive because molecules goes away from each other, which leads to increase in the pressure. Intermolecular force is defined as the force which interfere in the interaction between molecules.
Therefore, the pressure of a gas is increased if the intermolecular forces of a gas is repulsive rather than it is attractive.
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Hydrogen gas can be produced by reacting aluminum with sulfuric acid. How many miles of sulfuric acid are needed to completely react with 10.0 mol of aluminum? 2al(s)+3h2 so4 (sq) +3h2(g). stuck on my last answer help!
Taking into account the reaction stoichiometry, 15 moles of H₂SO₄ are needed to completely react with 10.0 mol of aluminum.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al(s) + 3 H₂SO₄(aq) → Al₂(SO₄)₃(aq) + 3 H₂(g)
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al= 2 molesH₂SO₄= 3 molesAl₂(SO₄)₃= 1 moleH₂= 3 molesMoles of H₂SO₄ requiredThe following rule of three can be applied: If by reaction stoichiometry 2 moles of Al react with 3 moles of H₂SO₄, 10 moles of Al react with how many moles of H₂SO₄?
moles of H₂SO₄= (10 moles of Al× 3 moles of H₂SO₄) ÷ 2 moles of Al
moles of H₂SO₄= 15 moles
Finally, 15 moles of H₂SO₄ is required.
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Select the correct answer.
A student has a solution of sodium nitrate and believes it is saturated. Which statement provides the best evidence that the solution is saturated?
A.
When more water is added, the appearance of the solution doesn’t change.
B.
When some of the water evaporates, all of the sodium nitrate remains dissolved.
C.
When a small amount of sodium nitrate is added, a large amount precipitates from the solution.
D.
When additional sodium nitrate is added, it all settles to the bottom of the container.
E.
When the temperature of the solution is increased, additional sodium nitrate can be dissolved.
A student has a solution of sodium nitrate and believes it is saturated. The statement provides the best evidence that the solution is saturated is: "When additional sodium nitrate is added, it all settles to the bottom of the container." (Option D)
What is sodium nitrate?The chemical compound with the formula NaNO 3 is sodium nitrate. To differentiate it from regular saltpeter, potassium nitrate, this alkali metal nitrate salt is sometimes known as Chile saltpeter. Nitratine, nitrate, and soda niter are all names for the mineral form.
If more solute is added and it still does not dissolve, the original solution has become saturated. If the solute supplied dissolves, the previous solution was unsaturated.
A saturated solution is a chemical solution with the maximum level of bound solvent. The excess solution will not dissolve in a saturated solution. The amount of fluid that can be added to a solvent to form a saturated solution depends on a variety of variables.
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Which list arranges the elements Na, Li, K, Rb, and Cs in order of increasing lonization energy (from left to right)?
A)Cs, Rb; K; Na; Li
B)Cs; Li, Na, K; Rb
C)Na, Li; K; Rb; Cs
D)Li, Na, K; Rb; Cs
The elements Na, Li, K, Rb, and Cs in order of increasing ionization energy is Li, Na, K, Rb, Cs. The correct answer is option D.
What is ionization energy?
The ionization energy is the minimum energy which is required to remove a valence electron from an isolated gaseous atom, molecule or a positive ion. This measures the ability of an atom to form an ion by losing an electron to take part in a chemical reaction.
As we move down the group, the ionization energy decreases due to the increase in the atomic size of an element. So, the electrons are far from the nucleus and loosely bound to the nucleus.
Therefore, it is easy to remove an electron from the elements which are found lower in the group. So, the order of increasing ionization energy is Li, Na, K, Rb, Cs, the correct answer is option D.
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How much heat would be needed to change the temperature of 100g water from 10°C to 50°C?
10.45 kJ heat would be needed to change the temperature of 100g water from 10°C to 50°C.
Temperature is the degree of hotness or coldness expressed in phrases of any of several scales, inclusive of Fahrenheit and Celsius. Temperature shows the direction in which warmness electricity will spontaneously waft i.e., from a hotter body to a colder frame.
calculation:-
Heat = ms× change in temperature.
= 100 × 4.2 × 50-10
= 100 × 4.2 × 40
= 10.45 J
The heat of an item is the whole energy of all of the molecular movement inside that item. Temperature is the degree of the thermal power or common heat of the molecules in a substance.
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a piece of limestone was added to 1 DM cube of 0.1 Mol per dmcube hydrochloric acid after effervescence and stopped 31.25 cm cube of the resulting solution required 25 cm cube of 0.05 moldm cube sodium hydroxide for complete neutralization calculate the mass of limestone added (caco3 = 100,hcl=36.5,naoh=40).
The mass of limestone added is 4.8 g.
The equation is given as:
CaCO₃ + 2HCl ----> CaCl₂ + H₂O + CO₂
no. of moles of HCl = 0.1 mol
moles of HCl react with NaOH = 0.1 × 31.25 / 1000
= 0.00312 mol
moles of HCl react with CaCO₃ = 0.1 - 0.00312
= 0.096 mol
from the above equation 1 mol of CaCO₃ react with 2 mol of HCl
moles of CaCO₃ = 0.096 / 2 = 0.048 mol
mass of CaCO₃ = moles × molar mass
= 0.048 × 100
= 4.8 g
Thus, a piece of limestone was added to 1 DM cube of 0.1 Mol per dm cube hydrochloric acid after effervescence and stopped 31.25 cm cube of the resulting solution required 25 cm cube of 0.05 mol dm cube sodium hydroxide for complete neutralization. the mass of limestone added is 4.8 g.
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Suppose two equal mass cars traveling with equal speeds in opposite directions collide head on and stick together. What fraction of the energy is dissipated?.
Suppose two equal mass cars traveling with equal speeds in opposite directions collide head on and stick together then fraction of the energy is dissipated is all kinetic is dissipated
A collision which is inelastic is one in which the internal energy changes and the collision is an example of a perfectly inelastic collision and the final velocity after the collision is zero
Here given data is
The mass of one car = the mass of the second car in the collision = m
The type of collision = inelastic collision
The speed of each of the cars in the collision = v and -v
And in an inelastic collision
m × v₁i + m₂ ×v₂i = (m₁ + m₂)×vf
Therefore we get
m × v₁i - m × vi = 0 = 2 × m × vf
Which give
vf = 0
The collision is an example of a perfectly inelastic collision and the final velocity after the collision is zero
The change in the energy is
ΔK.E = K.E final - K.E initial
K.E initial = 0.5mv² + 0.5mv² = mv²
ΔK.E = 0.5×(2×m)×0-0.5mv²+0.5mv² = -mv²
ΔK.E = -mv²
And the negative sign stand for energy given out and which give
The energy dissipated = mv² that is initial kinetic energy
Therefore all kinetic energy is dissipated
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Show how you might synthesize this compound from an alkyl bromide and a nucleophile in an sn2 reaction.
The 3-bromo-2-methylpentane is the alkyl bromide and azide is the nucleophile.
The bromine leaving group initiates the reaction, which is then followed by an assault on the electrophilic carbon at the bromine leaving site by the nucleophile azide.
In this reaction, azide and alkyl bromide mix to form the desired product using the SN2 mechanism. Through a coordinated process, the bromine atom is simultaneously removed and sodium azide, acting as a nucleophile, attacks the carbon-containing bromine group to produce the SN2 product.
As a result, we can infer that azide is the nucleophile and 3-bromo-2-methylpentane is the alkyl bromide.
A chemical species known as a nucleophile donates an electron pair in response to another chemical species in order to create a chemical bond. An electrophile can be any molecule, ion, or atom that is in some way electron-deficient. A nucleophile typically has one electron pair and is negatively charged or neutral.
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PLEASE HELP ME!!! Describe the experiments that led to the determination that electrons act as both particles and waves. Explain why this revelation was important.
The experiment that led to the determination that electrons act as both particles and waves is Feynman's Double Slit Experiment.
What is the Feynman's Double Slit Experiment about?
Feynman anticipated that electrons would behave like particles when just one slit was open. When both slits were open, however, the electrons generated a distinctive pattern of light and black fringes on the detector due to wave interference.
Based on the American Physical Society, the earliest iteration of the double-slit experiment was performed in 1801 by the British polymath Thomas Young (APS). His work proved the interference of light waves and established that light was a wave rather than a particle.
The double-slit experiment is proof in contemporary physics that light and matter may exhibit properties of both conventionally defined waves and particles; moreover, it demonstrates the essentially probabilistic nature of quantum mechanical events.
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in terms of intermolecular forces, why might it be beneficial to dissolve a very small amount of ionic solid in the acetone chromatography solvent?
The force that mediates a molecule's interaction with another molecule, including electromagnetic forces of attraction or repulsion, is known as an intermolecular force (IMF) or secondary force.
How does chromatography differ as a result of intermolecular forces?Intermolecular forces, such hydrogen bonds and dipole-dipole interactions in chromatography, are another factor that aids in keeping the analyte attached to your column's stationary phase. The compound is kept in the column longer and with greater strength as a result of stronger intermolecular forces.
How is chromatography affected by the solvent?We cannot separate a combination of components into their distinct components if the chromatography solvent is highly polar in nature. - The mixture of components cannot be separated into their individual components if the chromatography solvent is non-polar.
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There are three unknown samples (A, B, C) Sample A has particles farther apart and the volume is definite, Sample B has very far apart particles and volume is indefinite and Sample C changed from Sample A when we decreased the temperature. What is the state of matter in A, B and C? Please help quickly thanks
There are three unknown samples (A, B, C)
A is liquid
B is Gaseous
C is solid
There are 3 states of depend: solid; liquid and gas . They have special properties, which may be defined with the aid of using searching on the association in their particles.
A stable has a described form and volume. A not unusual place instance is ice. A liquid has a described volume, however can extrude nation. An instance is liquid water. A gas has neither a described form nor volume.
In physics, a nation of depend is one of the wonderful bureaucracy wherein depend can exist. Four states of depend are observable in regular life: solid, liquid, gas, and plasma
Here the conclusion are we know that in solid the particles are closely packed, in liquid they are farther and in gas state they are very farther and can move freely. when temperature changes the state of matter also changes.
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specify what ions are present in solution upon dissolving each of the following substances in water: 1nh422so4
The ions present in solution are:[tex](NH_{4})_{2} SO_{4} --------- > NH_{4}^{+} + SO_{4}^{2-}[/tex]
When these compounds are dissolved in water, they will separate into (ions) cations and anions.
Compound Cation Anion
(NH₄)₂SO₄ (Ammonium sulfate) NH₄⁺ (Ammonium) SO₄²⁻(Sulphate)
This compounds is made up of one cation and one anion but by convention while writing a chemical formula is that a cation is written first followed by an anion.
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during a titration of an acid with a base, you are often asked to identify the endpoint. what is the correct definition of the endpoint?
The phase of a colorimetric titration when the indicator changes color as a result of the reaction The equivalence point and the endpoint are not the same.
Acid-Base Titration: What is it?In order to ascertain the concentration of a certain species in an unidentified analyte solution, titration is a type of quantitative analysis. A specific chemical reaction occurs between a titrant reactant and an analyte reactant in every titration analysis. This happens through ionized hydrogen (proton) transfer in acid-base titration. The base/acid analyte is put in the flask below the burette, and the acid/base titrant is put in the burette. The analyte-containing flask is slowly titrated, and the reaction's progress is gauged by the pH of the resulting solution. Using a pH meter, this pH can be assessed, or more frequently by using colorimetric titration and an appropriate indicator chemical. Depending on the technique employed, every acid-base titration will proceed to the endpoint or equivalence point.
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How are lichens or moss similar to the pioneer species, like grass, that colonize an abandoned field? How are they different?
They both are considered the first species. They both have the way prepared for them by other species. Lichens and moss can exist where there is no soil, while pioneer species, such as grass, need soil to grow.
They both are considered the second species. They both have the way prepared for them by other species. Lichens and moss can exist where there is no soil, while pioneer species, such as grass, need soil to grow.
They both are considered the first species. They both have the way prepared for them by other species. Lichens and moss cannot exist where there is no soil, while pioneer species, such as grass, do not need soil to grow.
They both are considered the first species. They both prepare the way for other species. Lichens and moss can exist where there is no soil, while pioneer species, such as grass, need soil to grow.
Lichens or moss similar to the pioneer species, like grass, that colonize an abandoned field is lichens and moss can exist where there is no soil, while pioneer species, such as grass, need soil to grow
A moss is a simple plant and the lichen is the fungi and algae sandwich and mosses are multicellular organism with leaflets of photosynthetic cell and just as with trees, ferns and wildflowers and lichen are usually considered pioneer species because they are able to grow on bare surfaces like rock and a lichen is a producer that is actually composed of two different species a fungus and a algae and the alga photosynthesizes while the fungus absorbs nutrients from rock and hold water
And through their ability to adapt to living in extreme conditions and lichen can colonize substrates that are low in nutrients and are considered as true pioneer
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Use the appropriate number of sig. figs. for all of the below calculations.
6. A gentleman from Europe who is only familiar with the metric system ask you (the chemistry student) to please do the following conversion:
5.65 mi./ hr =? m/s
ans: 2.53 m/s
Answer:
your answer is correct tho
Explanation:
The thing here is to base the number of significant figures in the given.DO NOT USE THE CONVERSION FACTOR TO FIND THE NUMBER OF SIGNIFICANT FIGURES USED TO FIND THE ANSWER.
please rate it,Thanks.
what is the concentration, in m/v%, of a solution prepared by dissolving 65.4 g nacl in a total volume of 3.7 l of solution?
The concentration, in m/v %, of a solution prepared by dissolving 65.4 g NaCl in a total volume of 3.7 l of solution is 1.76 %.
The data given as follows:
mass of the NaCl = 65.4 g
volume of the solution = 3.7 L = 3700
concentration in m/v % is means that : mass by volume percentage and is given as :
concentration in m/v % =(mass of solute / volume of the solution ) × 100 %
= ( 65.4 / 3700 ) × 100 %
= 1.76 %
Thus, The concentration, in m/v %, of a solution prepared by dissolving 65.4 g NaCl in a total volume of 3.7 l of solution is 1.76 %.
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Earth's atmosphere exerts a force of 124,500 N on a kitchen table with an area of 1.5 m squared. What is the pressure in pascals?
Answer:
Pressure = 83,000 Pascals
Explanation:
Force exerted by Earth's atmosphere = 124,500 N
Area of kitchen table on which force is exerted = 1.5 m²
Formula:
[tex] \boxed{ \rm Pressure= \dfrac{Force}{Are}}[/tex]
By substituting values in the formula we get:
[tex] \rm \implies Pressure= \dfrac{124500}{1.5} \\ \\ \rm \implies Pressure=83000 \: Pa[/tex]
stories about the dangers of dihydrogen monoxide circulate occasionally online, and peoplecall for it to be banned. what is the formula for this compound?
H₂O is the formula for this compound.
How is H₂O prepared?
A water molecule (dihydrogen monoxide) is made up of two hydrogen atoms and one oxygen atom. But you can't just plonk two hydrogen atoms on top of an oxygen atom. The real water-making reaction is a little more complicated: 2H2 + O2 = 2H2O + Energy.
In English, the equation states that two molecules of diatomic hydrogen (H2) must be joined with one molecule of diatomic oxygen to generate two molecules of water (H2O) (O2). In the process, energy will be released.
"This reaction (2H2 + O2 = 2H2O + Energy) has been known for two centuries, but no one has made it work in a homogenous solution until now," said Thomas Rauchfuss, a chemical professor at the University of Illinois and the paper's corresponding author.
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Both suspensions and colloids are heterogeneous mixtures. Define and characterize a suspension, listing similarities and differences to a colloid. Give several examples of suspensions.
Suspensions are similar to colloids in that they are both heterogenous mixtures and are not true solutions.
Suspensions differ from colloids in that the particle sizes are larger and settle when left to stand.
Some examples of suspensions are smoke and dust particles in the air.
What are suspensions and colloids?Suspensions are a heterogeneous mixture of substances in which one substance is dispersed or distributed throughout a second phase. The particles of a suspension when left to stand will settles over time.
Some examples of suspension are dust particles dispersed in air, a gas.
Other suspensions may be solids dispersed in liquids such as in milk of magnesia.
Colloids or false solutions are a heterogeneous mixture of substances that are dispersed throughout a second medium and in which the particles do not settle when left to stand. The articles of a colloid can not be seen with the unaided eye.
Examples of colloids are gels, emulsions, and sols.
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the following reaction between structural isomers occurs in the gas phase: cyclopropane (c3h6) --> propene (c3h6) at 952k, 19.6% of a sample of cyclopropane changes to propene in 7.57 min. what is the half-life of cyclopropane at 952k?
Based on the conversion rate, the half-life of cyclopropane is 23.1 min.
Remaining cyclopropane amount = 100 - 19.6
Remaining cyclopropane amount = 80.4%
Using the formula -
ln remaining amount = - kt, where k is constant and t is time.
Keep the values -
ln (0.804) = -k7.57
Keep the value of ln 0.804
k = -0.22 ÷ -7.57
Cancelled negative sign and performing division
k = 0.03/min
t = 0.693 ÷ k
t = 0.693 ÷ 0.03
Performing division to find the half-life
time = 23.1 min
So, the half-life of cyclopropane is 23.1 min.
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an aqueous antifreeze solution is 30.0% ethylene glycol () by mass. the density of the solution is 1.05 . calculate the molality, molarity, and mole fraction of the ethylene glycol
In this particular problem, Molality is 10.74 m.
What is the difference between molality and molarity?
Despite the fact that both terms are used to describe the concentration of solutions, molality and molarity are not synonymous. The amount of solute dissolved in a litre of solution is known as its molarity. Molarity is denoted by the capital "M," and its formula is M=(# mol SOLUTE)/. (Liters of SOLUTION).
The amount of moles of solute per kilogramme of the SOLVENT, NOT the solution, is called molality. Molality is denoted by the lower case letter "m," and its formula is m=(# mole SOLUTE) /. (Kilograms of SOLVENT).
Most of the time scientists use either molarity or molality to represent solution concentration, but MOLALITY is preferred when the temperature of the solution varies. That is because MOLALITY does not depend on temperature, (Neither number of moles of solute nor mass of solvent will be affected by changes of temperature.) while MOLARITY changes as temperature changes.
In this particular problem, Molality = 10.74 m Molarity = 6.76 M mole fraction = 0.162 40%
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Which of the statements about the strands of a newly replicated dna molecule is correct?.
Option D. One strand is new and the other is from the original molecule, about the strands of a newly replicated DNA molecule is correct
Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around every different to form a double helix wearing genetic commands for the development, functioning, growth, and reproduction of all recognized organisms and plenty of viruses. DNA and ribonucleic acid are nucleic acids.
DNA replication is the organic manner of manufacturing two equal replicas of DNA from one unique DNA molecule. DNA replication happens in all dwelling organisms appearing because the most important part of biological inheritance
Learn more about DNA molecules here:-https://brainly.com/question/16099437
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Disclaimer:- your question is incomplete, please see below for the complete question.
Which of the statements about the strands of a newly replicated dna molecule is correct?.
A. Both strands contain some nucleotides from the original molecule.
B. The sugar-phosphate chains are conserved and new bases are inserted between them.
C. The base pairs are conserved and new sugar-phosphate backbones are built upon them.
D. One strand is new and the other is from the original molecule.
E. Both strands are made up of newly assembled nucleotides.
