The answer would be for this question is density = 1.95 g ml^-1.
Density is defined as the mass upon volume.
It is denoted by D.
Its unit is g/cm^3.
According to question,
Given,
Mass of an empty beaker = 4.995 g
Mass of unknown acid solution = 2.00 ml
Total or combined mass of the beaker = 9.893 g
To find density of the acid solution.
Calculation -
As you know the mass of empty beaker also the mass of the beaker increases after adding acid solution so,
Mass = 9.893 g - 4.995 g = 4.898 g
As the mass of an acid already mentioned only you need to get the value of the volume,
1 ml * 4.898 g / 2.0 ml = 2.449 g
Now the density of the acid solution is 1.95 g ml^-1.
To know more about density here :
https://brainly.com/question/15164682?referrer=searchResults
#SPJ4
why is energy released when imfs form between molecules as they approach each other? group of answer choices making imfs lowers the energy of electrons making imfs raises the energy of electrons
The energy released when IMF'S formed between the molecules as they approach each other because making IMF'S lowers the energy of electron and increase the level of stability.
Atoms tends to stabilize when they form IMF's , ans release energy in the process. energy is released because of the greater level of stability associated with low energy.
Energy is released in the chemical bond formation because bonds are in stable configuration. .the change in enthalpy will be negative for the process.the reaction is exothermic.In opposite breaking of bond required energy.
Thus ,energy is released when IMF'S formed between molecules as they approaches each other because they acquire greater level stability with low energy levels.
To learn more about IMF'S here
https://brainly.com/question/497701
#SPJ4
What is the Configuration Notation for Au? Show work!!
Answer:
[Xe] 4f14 5d10 6s1
Explanation
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s1
bc the composition of gold is very packed full of multiple other elements.
in a synthesis, the temperature inside the reaction flask is called the reflux temperature. what would be the internal reaction temperature in the diels alder reaction studied today?
In a synthesis, the temperature inside the reaction flask is called reflux. the internal reation temperature for diels alder reaction studied today is 25°C to 100°C.
The Diels -Alder reaction is the reaction between congugated di-ene and alkene (commonly termed as dienophile) to form unsaturated six - membered rings.The reaction involves the formation of cyclic product , so, it is also called as cycloaddtion.
Diels alder reaction occurs at low temperature to moderate temperature while retro diels alder reaction require high temperature often above 200°C. Diels alder reaction is a reversible process and at high temperature diels alder reaction can be reverted to starting diene and dienophile.
Hence,In a synthesis, the temperature inside the reaction flask is called reflux. the internal reation temperature for diels alder reaction studied today is 25°C to 100°C.
To learn more about Diels alder reaction here
https://brainly.com/question/8792706
#SPJ4
Which of these is a molecule and not a compound?
Oxygen
Water
Ammonia
Carbon Dioxide
Among the following, oxygen is a molecule and not a compound.
What is the difference between molecule and compound?Molecule is a group of two or three atoms which are held by chemical bonds.Compound is a substance composed of two or more atoms which are held together chemically in a fixed proportion.
Hence all molecules are not compounds but all compounds are molecules.Structure of molecule comprises of group of atoms which are held together by a strong force.
Thus,oxygen is a molecule as it is composed of 2 oxygen atoms while water, ammonia and carbon dioxide are compounds as they are composed of two-four atoms.
Learn more about difference between molecules and compound here:
https://brainly.com/question/21983682
#SPJ1
Which sources are reliable? Check all that apply.
A.an article discussing mineral resources written by the United States Geological Survey
B.a blog discussing sources of alternate energy written by a high school student
an advertisement for guided hikes and tours in Camping magazine
C.a study describing clinical trials of a new medication in the Journal of Medicinal Chemistry
D.an entry about common uses of metals in an encyclopedia that can be edited by the general public
Answer: it's B And D
Explanation:
What is the difference between solubility and concentration?
Answer:
Solubility is typically a limit to how much solute can dissolve in a given amount of solvent. Concentration is the quantitative amount of solute dissolved at any concentration in a solvent.
Explanation:
What is the element symbol for Gold?
The element symbol for Gold is Au.
The Element Symbol for Gold is Au
Hope this helps please give me Brainliest if this is correct. :)
A liquid has a volume of 26.0mL and has a mass of 36.4 grams. What is its density?
The density of liquid is 1.4g/ml
Here, given volume of a liquid is 26.0 ml= 0.026 L
given mass of liquid is 36.4 g
⇒ density = mass/volume
=36.4 /26.0
=1.4g/ml
=1400g/L
density is mass of a unit volume of a any substance.
The formula of density is d = M/V, where d =density, M = mass, and V = volume.
The units of density are grams per cubic centimetre,g/ml or g/L
For example,The density of gaseous oxygen is 0.0014 g/cm3, compared with liquid oxygen has a density of 1.1 g/cm3. So, solid masses have a high density as the particles are very close together, liquid masses are slightly less dense, and gas masses have very low density where particles are much further apart from each other.
Learn more about density calculations here-
https://brainly.com/question/15940284
#SPJ9
How to covert 265k to degrees Celsius
We'll be subtracting 273.15 from it.
(265 - 273.65)°C = -8.15°C
Can somebody please help me?
＼＼\٩(๑`^´๑)۶//／／
Explanation:
let's have a look at bohrs postulates to answer the question, (bohrs model was applicable only for hydrogen like species)
Electron revolves around the nucleus in a fixed circular orbit.The energy of electron revolving around nucleus doesn't change with time i.e. it have definite energy. The angular momentum of electron(mvr) is integral multiple of h/2π the electron may jump from one energy level to other by absorption or emission of energy.Now coming to your question,
Electrons can only orbit the nucleus in a fixed circular orbit.
Electrons prefer fo orbit in the shell which are close to nucleus or having less energy.
Each shell can only hold a specific number of electrons given by formula 2n² where n is the number of shell,
the 1st shell can hold 2n² = 2×1² = 2 electrons
the 2nd shell can hold 2×2² = 8 electrons
the 3rd shell can hold 2×3² = 18 electrons
An atom can gain or lose electrons to form an ion.
[tex]\sf \small \pink{Thanks }\: \green{for} \: \blue{joining} \: \orange{brainly } \: \red{community}![/tex]
Which event occurs during high tide?
All of Earth’s ocean levels rise.
The moon’s orbit is closer to Earth.
The gravity of the Sun and moon cause the Earth’s crust and water to bulge.
Earth’s crust and water are being pulled in opposite directions by the Sun and moon.
C. The event that occurs during high tide is the gravity of the Sun and moon cause the Earth’s crust and water to bulge.
What is high tides?
High and low tides refer to the regular rise and fall of the ocean's waters.
High tide is when water covers much of the shore after rising to its highest level.
Low tide is when the water retreats to its lowest level, moving away from the shore.
Thus, we can conclude that the event that occurs during high tide is the gravity of the Sun and moon cause the Earth’s crust and water to bulge.
Learn more about high tides here: https://brainly.com/question/2604305
#SPJ1
Classify the substances below into groups of your own design based on their
properties. With your teacher's permission, use the internet to research any
material that you do not know. Explain your classification. sc.8.P.8.4
Air
Water
Wax
Aluminum
Nails
Sugar
Bronze
Wood
Milk
Baking Soda
Titanium
Gold
Gasoline
Dry Ice
Vinegar
Graphite
Silver
Match
Salt
Bleach
The substances can be classified into pure and impure substances as follows:
Pure substances:
WaterAluminumSugarBaking SodaTitaniumGoldDry IceVinegarGraphiteSilverSaltImpure Substances:
AirBleachMatchGasolineWoodMilkBronzeNailsWaxWhat are the classifications of matter?Matter is anything that has mass and occupies space.
All substances are made of matter.
Matter can be classified into two based on the nature of the substance as follows:
Pure substances, and Impure substances.Pure substances are further classified into elements and compounds.
Impure substances are mixtures of two or more substances.
Based on the above, the given substances can be classified into pure and impure substances as follows:
Pure substances:
WaterAluminumSugarBaking SodaTitaniumGoldDry IceVinegarGraphiteSilverSaltImpure Substances:
AirBleachMatchGasolineWoodMilkBronzeNailsWaxLearn more about pure and impure substances at: https://brainly.com/question/19958556
#SPJ1
There is an atom of carbon-12 that adds 2 neutrons to the nucleus. What is the identity of the atom now? O Carbon-14 O Nitrogen-14 O Carbon-12 Oxygen-16
Answer:
he atomic number of carbon is 6. Carbon-14 is heavier than carbon-12 because the atomic nucleus of carbon-14 contains eight neutrons.
Explanation:
Neutrons may be defined as the type of sub-atomic particles which are present in the nucleus of an atom along with positively charged sub-atomic particles protons. Neutrons are neutral in nature which means they do not possess any charge.
The atomic number of both Carbon-14 and carbon-12 remains the same. While there is a difference in the atomic masses between these two atoms. Carbon-14 is heavier than carbon-12 because the number of neutrons in carbon-14 increases.
According to the formula:
The number of neutrons = Atomic mass - Atomic number
= 14 - 6 = 8.
Therefore, the atomic number of carbon is 6. Carbon-14 is heavier than carbon-12 because the atomic nucleus of carbon-14 con
Downwelling is the process that moves cold, dense water from the ocean surface to the seafloor near the polar regions. how can downwelling affect the ocean water around the poles? it brings warm, nutrient-rich water to the ocean floor. it brings water that is low in oxygen to the ocean surface. it brings low salinity water to the ocean surface. it brings oxygen-rich water to the ocean floor.
Donwelling is the process that moves cold, dense water from the ocean surface to the seafloor near the polar regions. Downwelling affect the ocean water around the poles as it brings oxygen - rich water to the ocean floor.
Downwelling occurs when the water on the surface of the sea becomes denser than the water beneath it and so it sinks. ocean water get denser when it gets cola or saltier.Most downwelling happens at the poles.
I f the air was warmer at the poles, then water wold be warmer too.so, without cold water there would be little downwelling.Oxygen in deep sea would have used up and without strong downwelling , there is no way to replenish oxygen.
Hence, Downwelling affect the ocean water around the poles as it brings oxygen - rich water to the ocean floor.
To learn more about Downwelling here
https://brainly.com/question/5350255
#SPJ4
two samples of sodium chloride were decomposed into their constituent elements. one sample produced 8.00 g of sodium and 12.3 g of chlorine, and the other sample produced 11.1 g of sodium and 17.1 g of chlorine.
These two samples of sodium chloride as provided in the question are in accordance with the law of definite proportion.
CalculationAccording to law of definite proportions, any provided chemical compound always contains its initial component elements in a fixed ratio, and it does not depend on its source and method of preparation.
So here in the first sample, we have
Mass of sodium = 8 g
n(Na) = 8/23
=0.347 mol
Mass of chlorine = 12.3g
n(Cl2) = 12.3/70.9
=0.173 mol
Thus, definite proportion = 0.173/0.347 ≈ 1:2
Then in the second sample,
Mass of sodium = 11g
n(Na) = 11/23
=0.478 mol
Mass of Chlorine =17.1g
n(Cl2) = 17.1/70.9
=0.241
Thus, definite proportion = 0.241/0.478 ≈ 1:2
Therefore, we see that in both of the samples, the proportion remains the same. Thus, both the samples follow the Law of definite proportion.
To know more about Law of definite proportion, visit:
https://brainly.com/question/28458716
#SPJ4
Be sure to answer all parts. Compounds a and b are isomers having molecular formula c5h12. Heating a with cl2 gives a single product of monohalogenation, whereas heating b under the same conditions forms three constitutional isomers. What are the structures of a and b?.
Neo-pentane represents the Compound A while compound B is n-pentane.
After careful consideration we can say that compounds A and B are alkanes and also isomers of pentane. In chemistry, Isomers are defined as compounds having same empirical molecular formula but different structural formulas due to varying arrangement of atoms.
Now, as per the question statement, compound A gives a single monochlorination product upon heating with the molecule of chlorine i.e. Cl2 showing that the molecule is extremely symmetric. This molecule must be neo-pentane. Refer to image 1.
Similarly, Compound B forms 3 constitutional isomers after undergoing monochlorination. This compound must be n-pentane since three are 3 different types of carbon atoms in the structure. Refer to image 2.
If you need to learn more about neo-pentane click here:
https://brainly.com/question/20815247
#SPJ4
Neopentane makes up component A, while n-pentane makes up compound B.
First and foremost, it is important to understand that compounds A and B are isomers and alkanes of pentane. Compounds with distinct structural formulas but the same molecular formula are known as isomers.
When heated with Cl2, compound A now produces a single monochlorination product, demonstrating the molecule's high degree of symmetry. Neopentane must be this chemical (image 1).
Upon monochlorination, compound B divides into three constitutional isomers.
A halogen atom is replaced with another substance in a process known as halogenation, where the halogen atom eventually becomes a component of the new substance or compound. In general, one or more halogens are typically added to the chemical during the halogenation reaction.
Learn more about halogens:
https://brainly.com/question/14191541
#SPJ4
Calculate the average atomic mass for the unknown element. Round to
TWO decimal places.
Isotope
unk-39
unk-41
Relative abundance
93.12 %
6.88%
Atomic Mass
38.964 amu
40.962 amu
Answer: 39.13
Explanation: 39 x 93.12%=36.31
41 x 6.88%= 2.82
2.82+36.31= 39.13
Antimony has two naturally occurring isotopes. The mass of antimony-121 is 120.904 amu and the mass of antimony-123 is 122.904 amu. If the average atomic mass of Antimony is 121.76 amu, find the % abundance of each isotope.
please show all the work you used to get to the answer! :D
Considering the definition of atomic mass, isotopes and atomic mass of an element, the percent natural abundance of antimony-121 and antimony-123 are 57.2% and 42.8% respectively.
Definition of atomic massThe atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.
Definition of isotopeIsotopes of an element are those where their atomic numbers are the same, but the number of neutrons is different.
Definition of atomic massThe atomic mass of an element is the weighted average mass of its natural isotopes.
The atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
Abundance of each isotopeIn this case, you know that:
The mass of antimony-121 is 120.904 amu and a percent natural abundance of x% or x expressed as a decimal number.The mass of antimony-123 is 122.904 amu and a percent natural abundance of (100 -x)% or (1-x) expressed as a decimal number. [both abundances add up to 100%]The average atomic mass of Antimony is 121.76 amu.The average mass of antimony can be calculated as:
120.904 amu×x + 122.904 amu×(1-x)= 121.76 amu
Solving it is possible to calculate the value of x:
120.904 amu×x + 122.904 amu×1- 122.904 amu×x= 121.76 amu
120.904 amu×x + 122.904 amu- 122.904 amu×x= 121.76 amu
120.904 amu×x - 122.904 amu×x= 121.76 amu - 122.904 amu
(-2 amu)×x= -1.144 amu
x= (-1.144 amu)÷ (-2 amu)
x= 0.572 → x%= 57.2%
So, the value (1-x) is 1-0.572= 0.428 → (100 -x)%= (100-57.2)%= 42.8%
Finally, the percent natural abundance of antimony-121 and antimony-123 are 57.2% and 42.8% respectively.
Learn more about average atomic mass:
brainly.com/question/4923781
brainly.com/question/1826476
brainly.com/question/15230683
brainly.com/question/7955048
#SPJ1
a 50. l rigid container with a pressure of 2.24 atm initially has 0.58 moles of h2(g) and 0.42 moles of f2(g). the chemical reaction h2(g) f2(g) --> 2 hf(g) then went to completion to as great an extent as possible. what is the final pressure of the container, assuming temperature was the same before and after reaction and all gases acted ideally?
Assuming temperature was the same before and after reaction and all gases acted ideally, the final pressure of the container is 2.24 atm.
What is a gas’s pressure?A gas’s pressure is defined as the strain it causes on the container’s walls. When you blow air into a balloon, the envelope opens because the pressure of the air molecules inside the balloon is higher than on the outside.
The direction in which mass flows is calculated while determining pressure.
What does gas pressure mean in plain ?The force created when gas particles collide with the wall of their container is known as gas pressure. Force is applied to a region to create pressure.
The force that a gas applies to a particular area is known as gas pressure.
CalculationAs it is a rigid container, so volume will not change.
So V and T are fixed.
Initially total moles = 0.58+0.42
n1 = 1 mole
H2 + F2 = 2HF
We have total moles = 0.84 +0.16 after reaction
= 1mole
n2 = 1 mole P1 = 2.24atm
so P1/n1 = P2/n2
⇒ 2.24/1 = P2/1
⇒ P2 = 2.24 atm
To know more about pressure, visit:
https://brainly.com/question/356585
#SPJ4
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the dependent variable is
The dependent variable in the experiment conducted by the scientist to determine the amount of salt in a body of water that affects the number of plants that can live in the water is the water.
That is, water is the dependent variable in the experiment.
Generally, a variable that is subject to change or manipulated in a scientific study is called the independent variable. The changes made in this independent variable may lead to a change in another variable called the dependent variable.
The Dependent variable is the variable that is affected in the study which is measured in the experiment. As in the case with the experimental study, the independent variable is the amount of salt as it can be manipulated by the scientist whereas the dependent variable is the water whose tendency is affected by the manipulation of the amount of salt so that the number of plants affected could be calculated easily.
Thus, the dependent variable is water and the independent variable is salt.
To learn more about dependent and independent variable, click below
https://brainly.com/question/1235879
#SPJ9
A salt solution that contains 0.90 g of NaCl in 100.0 mL of solution
Answer:
es 200.0ml
Explanation:
estabien easy
can you actually measure the mass of atoms using a scale like the one in this lab? explain
Answer:
you can't weigh an atom on a traditional scale. Instead, physicists for over a century have used an instrument called a mass spectrometer.
the value of δg'° for the conversion of 3-phosphoglycerate to 2-phosphoglycerate is 4.4 kj/mol. if the concentration of 2-phosphoglycerate at equilibrium is 1.25 mm, what is the concentration of 3-phosphoglycerate?
If the concentration of 2-phosphoglycerate at equilibrium is 1.25 mm, the concentration of 3-phosphoglycerate is 0.00034 molar.
CalculationΔG° for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is + 4.40 kJ/mole.
We know ΔG° = -2.303RTlogK
Where R = Universal gas constant = 8.314 x 10^-3 kj mole^-1 k^-1
T = Kelvin temperature = 25 + 273 = 298 K
⇒ log K = (4.4)/ -2.303 x 8.314 x 10^-3 x 298
⇒ log K = -0.77
⇒ K = 0.16
3-phosphoglycerate → 2-phosphoglycerate
K = [ 2-phosphoglycerate] / [3-phosphoglycerate]
Here K is an equilibrium constant.
0.16 = x / (2.15 x 10^-3)
x = 0.16 x 2.15 x 10^-3
x = 0.00034 molar or 0.344 mM at 25°C
To know more about Concentration, visit:
https://brainly.com/question/10725862
#SPJ4
A 5. 0 l flask containing o2 at 2. 00 atm is connected to a 3. 0 l flask containing h2 at 4. 00 atm and the gases are allowed to mix. What is the mole fraction of h2? report your answer to two decimal places.
The mole fraction of hydrogen is 0.55.
The volume of oxygen = 5 litres
The pressure of oxygen = 2 atm
The volume of hydrogen = 3 litres
The pressure of hydrogen = 4 atm
The universal gas constant is R.
R = 8.31 J mol—¹ K—¹
The ideal gas equation is,
PV = nR T
The number of moles of oxygen is,
PV = nRT
[tex]n = \frac{ PV }{RT }[/tex]
[tex]n = \frac{2 \times 5}{8.31 \times 273} [/tex]
n = 0.004 moles
The number of moles of oxygen is 0.004 moles.
The number of moles of hydrogen is,
PV = nRT
[tex]n = \frac{ PV }{RT }[/tex]
[tex]n = \frac{4 \times 3}{8.31 \times 273} [/tex]
n = 0.005 moles
The number of moles of hydrogen is 0.005 moles.
The mole fraction of hydrogen is,
[tex]Mole \: fraction = \frac{ Moles \: of \: solute }{Total \: number \: of \: moles \: of \: solute\: and \: solvent}[/tex]
[tex]Mole \: fraction = \frac{0.005}{0.009} [/tex]
= 0.55
Therefore, the mole fraction of hydrogen is 0.55.
To know more about mole fraction, refer to the below link:
https://brainly.com/question/28344281
#SPJ4
List at least 3 difference between how you measure a liquid sample from a buret versus a graduated cylinder.
Difference between how to measure a liquid sample from a buret verus a graduated cylinder is- A burette is a scaled cylindrical tube attached to a turning plug or stopcock or a valve whereas a graduated cylinder is a cylinder used to measure bulk volumes.
A burette is a laboratory apparatus used in chemical analysis to measure a liquid sample, having a graduated glass tube with a turning plug at one end and the graduated cylinder is a also a laboratory apparatus used to measure liquid sample.
To measure the liquid sample, you pour the liquid into measuring cylinder. The cylinder has volume graduation marks on the side of the cylinder which indicates the volume. Volume can be read directly from the bottom of the liquid meniscus. A burette is preferred to be used in titration because it can be used to dispense accurate volumes of liquid and it can contain enough amount of reagents for titration. It has graduation marks used to read the volume delivered and it reads from top to bottom starting zero.
To learn more about cylinders and burette,
https://brainly.com/question/4248282
#SPJ4
What would be the structural diagram for the line diagram attached to the assignment??
This is a methanediol CH₂(OH)₂. The line structure have been attached in the figure given below.
This is also known as formaldehyde monohydrate. This is a organic compound with chemical formula CH₂(OH)₂, this is simply known as geminal diol which is a sugar alcohol. This is the product of hydration of formaldehyde. It is believe that this is occur as an intermediate in the decomposition of carbonyl compounds in the atmosphere and this is the by product of ozonolysis. It is used in and a microbial activity, biocide and nail conditioning. This also used in household products and commercial industries.
Learn more about structural formula here https://brainly.com/question/514499
#SPJ1
Calculate the energy of blue light(425nm). What is the energy of a mole of blue photons?
The energy of a mole of blue photons is determined as 4.68 x 10⁻¹⁹ J.
What is the energy of a photon?The amount of energy carried by a photon is directly proportional to the photon's electromagnetic frequency and inversely proportional to the wavelength of the photon.
E = hf
E = hc/λ
where;
f is the frequency of the blue lightλ is wavelength of the blue light = 425 nmc is the speed of the blue lighth is Planck's constantThe energy of a mole of blue photons is calculated as follows;
Substitute the given parameters and solve for the energy of the photon.
E = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (425 x 10⁻⁹)
E = 4.68 x 10⁻¹⁹ J.
Thus, the energy of a mole of blue photons is determined as 4.68 x 10⁻¹⁹ J.
Learn more about energy of a photon here: https://brainly.com/question/15946945
#SPJ1
please help!!! asap!!! POINTS: 16
Why is the law of conversation of matter important 
Answer:Conservation laws are fundamental to our understanding of the physical world in that they describe which processes can or cannot occur in nature.
Explanation: An important function of conservation laws is that they make it possible to predict the macroscopic behaviour of a system without having to consider the microscopic details of the course of a physical process or chemical reaction.
in the quantum-mechanical model of the atom, an electron is viewed as a wave-particle that occupies a three-dimensional space near the nucleus. the movement of the electron is described by a function, which is also called an atomic .
The answer would be for this question is wave and orbital.
In the quantum mechanical model of the atom, an electron is seen as a wave substance that covered a 3- d space near the nucleus, the motion of the electron is explained by wave function, which is also called as a atomic orbital.
Wave function : It is a mathematical function it tells the position of the particular electron.
Atomic Orbital : It explains the position and wave kinda behaviour of an electron in the specific atom.
Quantum Mechanical model of the atom explains the particular position and functioning of an electron also it explains the different energy levels like orbital , energy sublevel and principal energy level.
To know more about more about Quantum Mechanical model of the atom here :
https://brainly.com/question/13352063?referrer=searchResults
#SPJ4