The proper IUPAC name for the compound is (2R,3S)-2,3-difluorohexane.
It is determined by following the IUPAC nomenclature rules for organic compounds. The key points for this are:
Parent Chain: The parent chain is a hexane, which is a six-carbon chain.Position of Substituents: A first substituent is a fluoro group that is on the second carbon of the parent chain, and a second substituent is a fluoro group that is on the third carbon of the parent chain. We use the prefix di- to indicate that there are two substituents.Absolute Configuration: The compound is a chiral compound, meaning that it has non-superimposable mirror images. To indicate the absolute configuration, we assign the priority of the substituents based on the atomic number of the atom directly bonded to the carbon atom of the substituent. The prefix (2R,3S) indicates that the substituent on the second carbon is in the R configuration and the substituent on the third carbon is in the S configuration.Final IUPAC Name: The proper IUPAC name of the compound is (2R,3S)-2,3-difluorohexane.Learn more about IUPAC nomenclature here:
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What best describes the enthalpy of formation of a substance?
A. The energy needed to cause the substance to change phases
B. The energy change that happens when a substance forms from its
elements
C. The energy absorbed or released in a chemical reaction
D. The total thermal energy of all the molecules in the substance
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!The answer is D!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
What best describe the enthalpy of formation is that it is the energy change that happens when a substance forms from its elements
Option b
This goes to say that it is the heat change which occurred when one mole of substance is formed from its constituent elements.
What is enthalpy?Enthalpy can be defined as the sum total of the internal energy and the product of the pressure and volume of a system
So therefore, the entalphy of formation is
the energy change that happens when a substance forms from its
elements
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Answer:
The answer is B, The energy change that happens when a substance forms from its elements
Explanation:
When sand and water are mixed in a beaker, the sand is mixed into the water. However, if you stop stirring, the sand will settle down to the bottom. This mixture is a
a
solution
b
suspension
c
colloid
d
solute
Find the number of moles of in 571,0 g of tetraphosphorous octoxide.
Answer:
Think sorry if i did it wrong The molar mass that is the mass of 6.022 X 1023 atoms of helium is 4g. Hence 1 mole of He = 4 g of He = 6.022 X 1023atoms of He. 1 g of He = (6.022 X 1023) / 4 atoms of He. 52 g of He = (6.022 X 1023X 52 ) / 4 atoms of He.
For Helium,
Number of atoms=Number of moles ×6.022×1023
No of Moles = 6.022×10
2312.044×10
23 = 2.
Now, atomic mass of He=4
Weight = 2×4 = 8 g
The molar mass that is the mass of 6.022 X 1023 atoms of helium is 4g. Hence 1 mole of He = 4 g of He = 6.022 X 1023atoms of He. 1 g of He = (6.022 X 1023) / 4 atoms of He. 52 g of He = (6.022 X 1023X 52 ) / 4 atoms of He.
As we know, gram atoms = gram mole
here, no of moles = 23/46 =2 so no of gram atoms are 2.
Explanation:
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New questions in Chemistry
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the reaction between strontium hydroxide and chloric acid produces __________.
Paper chromatography is a process used to separate mixtures of substances into their components. The components are carried by a mobile phase through a stationary phase made of absorbent paper. An investigation analyzed a sample of black ink to determine its components.Which property allows the components to separate
Because of its simplicity, comparatively low cost, great sensitivity, and rapid separation, TLC is an extensively used analytical method.
Using a thin stationary phase supported by an inert backing, thin layer chromatography (TLC) is a chromatographic technique used to separate the components of a mixture. It can be carried out on an analytical scale to track the development of a reaction or on a preparative scale to purify minute quantities of a chemical. Similar to all chromatography, TLC works on the premise that a chemical will have varying affinities for the mobile and stationary phases, which will influence how quickly it migrates. TLC aims to produce well-defined, well-separated spots.
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In the lab, chemist analyzed a sample of methanol and found that it was made of 6. 20 g of carbon, 4. 10 g of hydrogen, and 15. 90 g of oxygen. What is the percent composition of each element? Round each answer to the tenths place
The percentage composition of carbon is 19.37% and percentage of oxygen is 49.68% and percentage composition of hydrogen is 12.8%.
According to question,
6.20g of carbon, 4.10g of hydrogen and 15.90g of oxygen is present in total sample of methanol.
Total mass of methanol is=mass of carbon x 1+ mass of oxygen x 1+mass of hydrogen x 4
Total mass= 12x1+16x1+1x4
Total mass=32g
Now, to find the percentage composition of each element use the total mass and given mass of element.
The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage composition of a given compound. In this instance, the quantity is expressed in gram of the constituent ingredients.
Percentage composition[tex]=\frac{mass of an element}{total mass}*100[/tex]
Percentage composition of carbon=[tex]\frac{6.20}{32} *100[/tex]
On solving we get,
Percentage composition of carbon=19.37%
Percentage composition of oxygen=[tex]\frac{15.90}{32}*100[/tex]
On solving we get,
Percentage composition of oxygen=49.68%
Percentage composition of hydrogen=[tex]\frac{4.10}{32}*100[/tex]
On solving we get,
Percentage composition of hydrogen=12.8%
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how many moles of iron (iii) oxide is needed to produce 2 moles of oxegen
How many neutrons are in an atom of nitrogen-14?
There are 7 neutrons in an atom of nitrogen-14.
Nitrogen-14 is primarily an isotope of nitrogen, as is well known. We can also describe it as a neutral atom. Additionally, various isotopes typically have a variable ratio of neutrons to protons.
As is common knowledge, an atom's atomic number represents the total number of protons that make up its nucleus. We are informed that nitrogen has a mass number of 14, and we are also aware that nitrogen has an atomic number of 7.
It is discovered that the atomic number and the number of protons are same. This demonstrates that the nucleus of any atom that is an isotope of nitrogen will in general have seven protons.
Additionally, the number of electrons equals the amount of protons. The number of electrons will therefore be 7, we can say. We shall now determine how many neutrons are there. As is well known, mass is equal to the sum of the protons and neutrons. As a result, there will be = 14 - 7 = 7 neutrons.
As a result, we may say that nitrogen-14 has 7 electrons, 7 protons, and 7 neutrons and that it is neither an anion nor a cation. It's an impartial atom.
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Solve the following equation for X. Remember to balance the equation. Xe + 2F2 -> X In the above question we see the reaction between Xe and fluorine gas F2. Interestingly, Xenon has a high affinity for oxygen, and xenon fluorides are known to undergo hydrolysis to give the hydrohalic acid and the rare gas oxide similar to the following equation: XeF6 + 3H2O -> X + 6HF
xenon fluorides are known to undergo hydrolysis to give the hydrohalic acid and the rare gas oxide similar to the following equation: XeF6 + 3H2O -> XeO3 + 6HF.
A noble gas compound with the formula XeF6 is xenon hexafluoride. It is one of xenon's three binary fluorides, along with XeF2 and XeF4. All known are exergonic and stable at normal temperatures. The series' strongest fluorinating agent is XeF6.Water's chemical formula is H2O, which means that each of its molecules consists of two hydrogen atoms and one oxygen atom. In its +6 oxidation state, xenon can form the unstable chemical xenon trioxide(XeO3). It is an extremely potent oxidizing agent that slowly releases oxygen from water, a process that is sped up by sunshine. When it comes into touch with organic materials, it explodes dangerously. It emits xenon and oxygen gas when it explodes.
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The gas in a container has a pressure 300kPa at 27 C. What will the pressure be if the
temperature is lowered to -173 C?
Answer:
100 kPa
Explanation:
This can be solved with one of the gases law. This law establishes that the pressure of the gas is directly proportional to its temperature: If we increase the temperature, the pressure will increase.
In this case, we decrease the temperature, so its pressure will be lower.
P₁ / T₁ = P₂ / T₂
We convert T° to Absolutes Values
27°C + 273 = 300 K
-173°C + 273 = 100 K
300 kPa / 300 K = P₂ / 100 K
(300 kPa / 300 K) . 100K = P₂
P₂ = 100 kPa
This is the Charles Gay Lussac's law.
Which of the following does NOT cause a shift in a chemical equilibrium position?
a. Decreasing temperature
b. Adding more solid reactant
c. Increasing concentration
d. Decreasing volume
Answer:
d. Decreasing volume
step by step explanation:
Which term describes this reactions?
addition
condensation
elimination
substitution
Answer: condensation
Explanation: This is because a condensation reaction involves the loss of one or more water molecule
A terminology which can be used to describe the above chemical reactions is condensation.
What is condensation?Condensation can be defined as a type of chemical reaction in which the combining chemical elements or compounds (reactants) losses one or more water molecule.
Based on the reaction shown above, we can deduce that the reacting chemical compounds (reactants) lost one water molecule.
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How many electrons are neutral in c14?
Neutral carbon-14 contains six electrons, six protons, eight neutrons.
- The smallest particle that may exist, an atom, is what creates the entire cosmos. It has a core nucleus that houses the neutral species known as neutrons and positively charged species known as protons.
The orbit of the nucleus is being circled by negatively charged species of electrons. The atomic number of an atom is determined by its protons, and the number of protons is always equal to the number of electrons.
The carbon-14 in this instance is an isotope of carbon-12 with a mass number of 14. Atomic number six carbon has a total of six protons and six electrons.
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Two students are comparing scientific experiments to investigations. They came up with the following ideas.
Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year
One student gave an example of an investigation and the other gave an example of an experiment. Which student gave an example of a scientific investigation?
(5 points)
Student A because it requires a hypothesis
Student B because it requires a hypothesis
Student A because it can be done in natural settings od
Student B because it can be done in natural settings
Answer:
Student B because it can be done in natural settings
Explanation:
what is the likely composition of the indicator solution when the intermediate or transistion color is observed in step 6
A blend of dyes called a universal indicator gradually changes color throughout a pH range of 4 to 14. The color serves as a direct indicator of pH.
Thymol blue, methyl red, bromothymol blue, and phenolphthalein are the primary ingredients of a universal indicator in the form of a solution. Colors ranging from yellow to red denote an acidic solution, whereas colors ranging from blue to violet denote an alkaline solution and green denotes a neutral solution. Substances called indicators are those whose solutions change color as the pH changes. We refer to these as acid-base indicators. The conjugate base or acid versions of these typically weak acids or bases have various hues because of variations in their absorption spectra.
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1. An organ which receive the waste product carried by the blood.
4. It is a gas that the body needs.
6. It is a combination of hemoglobin and oxygen that enters the body.
7. The respiratory and digestive work as it absorbed
that being
distributed through the body.
10. The system responsible for digestion of food
Down:
2. The ability to maintain a relatively stable internal state that persist despite
changes in the world outside,
3. The respiratory and circulatory work together by exchanging of
5. The signal that circulatory system carries that control the speed of digestion.
8. The system responsible of exchange of gases
9. The system carries nutrients to the entire body cells.
1. Kidney receive the waste product carried by the blood.
2. Homeostasis is the ability to maintain a relatively stable internal state that persist despite changes in the world outside.
3. The respiratory system and circulatory system work together by exchanging of oxygen and carbon dioxide.
4. Oxygen is a gas that the body needs.
5. Chemical signals are carried out by circulatory system that control the speed of digestion.
6. Oxyhemoglobin is a combination of hemoglobin and oxygen that enters in the body.
7. The respiratory system and digestive system work as it absorbed oxygen that being distributed through the body.
8. The respiratory system is responsible for exchange of gases.
9. The circulatory system carries nutrients to the entire body cells.
10. The digestive system is responsible for food digestion.
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1. A Satellite's velocity is 30,000 m/s after one minute, It is 15,000 m/s. What is the Satellite's acceleration ?
Answer: i don't know
Explanation:
what is the difference between sigma and pi bonds
In chemistry, a sigma bond (σ bond) is a chemical bond formed by the overlap of two atomic orbitals. On the other hand, a pi bond (π bond) is a chemical bond formed by the overlap of two p orbitals.
Sigma bonds are the strongest type of covalent bond, with a bond strength of about 280-350 kJ/mol. They are also the shortest bond, with an average length of about 0.15 nanometers (nm).
Sigma bonds are characterized by their short bond length and high bond energy. They are also directional, meaning that they are stronger in certain orientations than in others.
Pi bonds are weaker than sigma bonds, with a bond strength of about 70-100 kJ/mol. They are also longer than sigma bonds, with an average length of about 0.2nm.
Pi bonds are characterized by their longer bond length and lower bond energy compared to sigma bonds. They are also less directional than sigma bonds, meaning that they are relatively equally strong in all orientations.
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Covalent bonds has two types which are a sigma bond is a chemical bond formed by the overlap of two atomic orbitals and a pi bond (π bond) is a chemical bond formed by the overlap of two p orbitals.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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Ribose is an important sugar with a molar mass of 150.15 g/mol and an empirical formula of CH2O. What is the molecular formula
Ribose is an important sugar with a molar mass of 150.15 g/mol and an empirical formula of CH₂O . Its molecular formula is C₅H₁₀O₅
A molecular formula is defined as the exact number of different atoms present in the molecule of a compound. On the other hand, an empirical formula is defined as the simplest whole number ratio of the different atoms present in a molecule of a compound.
Given here,
molar mass of ribose sugar = 150.15 g/mol
empirical formula = CH₂O
To find: molecular formula
empirical formula mass of ribose sugar
= (12+ 1×2+ 16) g/mol
= 30 g/mol
molar mass/ empirical formula mass
= 150.15 gmol⁻¹ / 30 gmol⁻¹
=5.005
≈5
we know that
molecular formula
= molar mass/ empirical formula mass × empirical formula
=5 ×CH₂O
= C₅H₁₀O₅
Thus, the molecular formula is C₅H₁₀O₅
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Determine the number of atoms of each element in the following: 4Al(OH)3
symbol
aluminium - Al 4
oxygen- o 12
hydrogen- H 12
What is the mass of 2.30 x 10^24 particles of water, H₂O?
The mass of 2.30 x 10²⁴ particles of water (H₂O) is 60.84 grams.
What exactly is mass defined as?The amount of matter in a particle or object is represented by its mass, which is denoted by the symbol m. In the International System (SI), the kilograms serves as the default unit of mass (kg).
The formula N = n L describes the relationship between a substance's number of particles and number of moles.
n also defined using the equation n = m/M
N = n L
N = m/M L
Then substitute N and L values,
2.30×10²⁴ = m/M × 6.02×10²³
Molar mass of water = 18
2.30×10²⁴ = m/18 × 6.02×10²³
2.30×10²⁴/6.02×10²³ = m/18
3.38 = m/18
m = 3.38 × 18
m = 60.84grams.
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An oxygen-binding protein was purified from a mollusk. It was found to exhibit fluorescence, which means that it has amino acid residues that absorb light of one wavelength and then emit light of a longer wavelength. Generally, the more exposed these residues are to solvent, the greater their fluorescence intensity. When placed in a deoxygenated buffer solution, the protein's fluorescence was measured and assigned a value of 1.0. Then the amount of protein fluorescence was measured under various other conditions and expressed relative to the initial measurement. The results are summarized in the table. Which conclusion is supported by these results
The conclusion is supported by these results is binding of oxygen to the protein changes the protein's tertiary structure to a conformation that resists the effects of urea.
Simple definition of fluorescenceFluorescence is a property that some chemicals have that allows them to emit visible light after absorbing radiation that is typically invisible, like ultraviolet light.
Fluorescence is the name given to the process of electromagnetic radiation typically visible light emitting from a material as a result of atoms being excited. These excited atoms almost immediately (within 10⁻⁸ seconds) begin emitting again. In most cases, the initial excitation is brought on by the energy absorption of incident radiation or particles, like X-rays or electrons.
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There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks:
Mass (amu) Relative Size
157. 836 0. 2569
159. 834 0. 4999
161. 832 0. 2431
(a) What is the origin of each peak (of what isotopes does each consist)?
(b) What is the mass of each isotope?
(c) Determine the average molecular mass of a Br2 molecule.
(d) Determine the average atomic mass of a bromine atom.
(e) Calculate the abundances of the two isotopes
There are two isotopes of bromine atom⁷⁹Br, ⁸¹Br.
a) Each peak originates from a different isotope of bromine. Each peak is composed of a different isotope of bromine. The mass of each isotope is the sum of the masses of the two atoms in the molecule. The average molecular weight of Br_ molecules is 36.184 g/mol.
b) The isotope of bromine has an atomic weight of 78.92 amu and a relative abundance of 50.69. The other major isotope of bromine has an atomic mass of 80.92 amu and a relative abundance of 49.31.
c) The average molecular mass of a [tex]Br_{2}[/tex] = 159.8066274.
d) The average atomic mass of Bromine is found to be. 9 u or 79.9 g mol⁻¹.
e) Bromine has two stable isotopes, ⁷⁹Br and ⁸¹Br, having relative mass abundances of 50.686% and 49.314%
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What will happen if you put a metal object to the beaker??
Answer:
umm i guess if there is a liquid inside it would rise to the top and the metal would sink to the bottom
How many moles of H3PO4 form from 9 mol P4O10
According to the given chemical equation and stoichiometry of it , 36 moles of H₃PO₄ are formed from 9 moles of P₄O₁₀.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
As per the reaction, 1 mole of P₄O₁₀ produces 4 moles of H₃PO₄, thus 9 moles of P₄O₁₀ will produce 9×4=36 moles of H₃PO₄.
Thus,36 moles of H₃PO₄ are formed from 9 moles of P₄O₁₀.
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Answer:36
Explanation:
taking the class just got it right
The movement of the liquid in a thermometer shows changes in temperature. An increase in temperature indicates the molecules in the liquid (A) moved slower and closer together (B) contracted in size when heated (C) moved faster and spread farther apart (D) expanded in size when heated
(C) moved faster and spread farther apart
An increase in temperature indicates the molecules in the liquid move faster and spread farther apart. The mercury thermometer was named after physicist Daniel Gabriel Fahrenheit in Amsterdam. Mercury thermometers are useful in many ways such as measuring body, liquid, and vapor temperature. The movement of the liquid in a thermometer shows changes in temperature. With an increase in temperature shows the molecules in the liquid are moving faster and the temperature is rising in the thermometer. The mercury expands to indicate a higher temperature up the tube which is marked in order to recognize a measurement of temperature. Mercury thermometers are rare today as most of them are toxic nowadays. A Mercury thermometer consists of a bulb containing mercury attached to a glass tube; the volume of mercury in the tube is much less than the volume in the bulb.
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HELPPPPP PLZZZ ASAPPPPPPPP
Three Chemistry students find a bottle of colorless liquid in the laboratory and each makes a different suggestions about the identity of its contents.
Josh: I think it is a reducing agent.
Matthew: I think it is an oxidizing agent.
Ricchard: I think it is neither a reducing agent nor an oxidizing agent.
Answer:
and the question is?
Explanation:
First, once in the simulation, click on “solution values”. Move the blue levers (solute amount) and (solution volume) to the required amounts and find the molarity of the following:
1. Using Drink Mix mode:
a. What is the molarity when .772 moles are dissolved in .500 Liters of water?
b. What is the molarity when .453 moles are dissolved in .450 Liters of water?
The molarity when .772 moles are dissolved in .500 Liters of water is 0.0015M. The molarity when .453 moles are dissolved in .450 Liters of water is 0.001M.
What is molarity ?The term molarity is defined as the number of moles of solute dissolved in per litre of solution. The unit of molarity is mole, which is denoted by the symbol "M".
M = Number of moles of solute / litre in solution
1. Number of moles of solute = .772 moles
so, 0.772 / 500
= 0.0015 M
2. Number of moles of solute = .453 moles
so, .453 / 450
= 0.001 M
Thus, The molarity when .772 moles are dissolved in .500 Liters of water is 0.0015M. The molarity when .453 moles are dissolved in .450 Liters of water is 0.001M.
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How do you know if an element is reactive or not?
The reactivity of an element depends upon the number of valence electrons, i.e., the electrons present in the outermost shell.
The number of electrons withinside the outermost shell of an atom determines its reactivity. Noble gases have low reactivity due to the fact they've complete electron shells. Halogens are extraordinarily reactive due to the fact they with ease advantage an electron to fill their outermost shell. Non-reactive metal atoms have whole outer shells and therefore do now no longer generally tend to lose, advantage, or percentage electrons. So, all factors having a crammed outermost shell are non-reactive. They also are referred to as noble gases. An element's reactivity is decided via way of means of the number of protons determined in an atom of the element.
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