Electron configuration notation describes an atom in an excited state as [Ar]4s²3d84p¹. Option D.
An electron is in an excited state when it temporarily occupies a higher energy state than its ground state. Electrons are excited when additional energy is supplied. When it absorbs a photon or packet of light or collides with a nearby atom or particle.
When an electron absorbs energy and shifts from a lower energy orbital to a higher energy atomic orbital the atom assumes an exciting electronic configuration. Usually an unstable electronic configuration. As a result, the electron returns to the ground state and releases a certain amount of energy. Ground state means the state with the lowest energy. When an electron absorbs energy and pops into an outer orbit, this state is called an excited state.
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Balance the following equationAl(s) + HCl (aq) arrow AlCl3 (aq) + H2then calculate the volume of hydrogen gas produced from the reaction of 0.245 g of aluminum hen completely reacted with excess hydrocchloric acid. The gas was collected over water at 28 degrees celsius and a total pressure of 745 torr.
Utilize this chemical equation balancer to balance the Al + HCl = AlCl3 + H2 reaction! ... It's possible that the equation 2Al(s) + 6HCl(aq) = 2AlCl3(aq) + 3H2(g) is ionic.
What is the purpose of hydrogen?Fuel cells may produce energy, power, and heat using hydrogen. The two industries where hydrogen is currently most widely employed are fertilizer manufacturing and petroleum refining, with the developing markets of utilities and transportation.
Can hydrogen water be consumed?Experts disagree that drinking hydrogen water has any hazards. However, they are unsure if its advantages outweigh those of drinking regular water or being hydrated in general. Hyponatremia, which can be fatal, can result from excessive water intake.
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If the chemical reaction AB + CD to AD + BC releases heat, what is true of the stored bond energy of the reactants and products?
The bonds do not have energy, the atoms release heat.
change: unmarried alternative AB + C → AC + B
exchange: Double alternative AB + CD → ad + CB
mixture (Synthesis) A + B → AB
Decomposition AB → A + B
A chemical reaction is a method that ends in the chemical transformation of one set of chemical substances to some other.
A procedure that includes rearrangement of the molecular or ionic shape of a substance, in preference to a exchange in bodily form or a nuclear reaction.
A chemical response is a technique in reactants react chemically and convert into products via chemical transformation. as an example, breathing – we inhale oxygen which reacts with glucose and produces carbon dioxide, water and strength. The response is given below. C6H12O6 + 6O2 → 6CO2 + 6H2O + power.
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An ideal gaseous reaction (which is a hypothetical gaseous reaction that conforms to the laws governing gas behavior) occurs at a constant pressure of 45.0 atm and releases 66.7 kJ of heat. Before the reaction, the volume of the system was 8.80 L . After the reaction, the volume of the system was 3.00 L . Calculate the total internal energy change, ΔE , in kilojoules.
The change in the total energy of the system is -93.1kJ.
What is the first law of thermodynamics?Let us note that the term thermodynamics has to do with the study of heat. Recall that heat is that which leads to the increase in the temperature of a body. From the first la of thermodynamics, we know that heat can neither be created nor destroyed but can be transformed from one form to another as we can see.
We also know from the first law of thermodynamics that;
ΔE = q + w
ΔE = total internal energy
q = heat absorbed or evolved
w = work done
Let us find the work done as;
w =pΔV
w = 45.0 atm (3 - 8.8)
w = -261 atm L or -26.4 kJ
We have q as -66.7 kJ because heat was released
ΔE = -66.7 kJ - 26.4 kJ
ΔE = -93.1kJ
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The combustion of propane may be described by the chemical equation
C₂Hg (g) + 5O₂(g) → 3 CO₂(g) + 4H₂O(g)
-
How many grams of O₂(g) are needed to completely burn 27.6 g C3H₂(g)?
Water has a molar mass of 18 g/mol while propane has a molar mass of 44 g/mol.
As a result, 44.0 g (1 mole) of propane will burn in order to produce 4 moles of water.
Mass of water obtained =4×18=72.0 g.
What kind of reaction is propane combustion?Propane undergoes burning with hydrocarbons to release its chemical energy. An animation of hydrocarbon combustion is shown here to demonstrate the overall process that happens when oxygen and propane mix. One instance of an exothermic process is the hydrocarbon combustion reaction, which produces heat energy.
A fuel and an oxidant, often atmospheric oxygen, engage in a high-temperature exothermic (heat-releasing) redox (oxygen-adding) chemical reaction during combustion that results in oxidised, frequently gaseous products in a mixture known as smoke.
The balanced chemical equation for the total combustion of propane states .
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Which type of chemical reaction is condensation?
Match the words in the left column to the appropriate blanks in the sentences on the right.
Condensation is a chemical reaction of synthesis. It represents two organic molecules producing one organic molecule and a water molecule.
What are condensation reactions?Condensation reactions are reactions in which two or more substances combine together chemically to produce a larger molecule with the elimination of a small molecule such as water, ammonia, or HCl.
Condensation reactions are important reactions in the formation of polymers.
Polymers are large organic molecules that are composed of smaller repeating units known as monomers.
An example of a condensation reaction is the reaction in which two amino acids are linked together by a peptide bond to form a dipeptide. A water molecule is also eliminated.
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How many moles of HCl are produced when 9.86 g of SOCl2 reacts? The balanced equation is:
SOCl2(ℓ)+H2O(ℓ)→SO2(g)+2HCl(g)
29. How many protons, neutrons, and electrons does 35/17C1¹+ have?
Answer:
proton= 17
neutron=18
electron=16
A certain gas is present in a 11.0 L cylinder at 2.0 atm pressure. If the pressure is increased to 4.0 atm , the volume of the gas decreases to 5.5 L . Find the two constants ki , the initial value of k , and kf , the final value of k , to verify whether the gas obeys Boyle’s law.
Express your answers to two significant figures separated by a comma.
A certain gas is present in a container obeys Boyles law.
What is Boyles law?The Boyles law stated that if the temperature and amount of gas remain constant within a closed system, the absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it fills.
Boyles law can be expressed as
P1V1 = P2V2
As per Boyles law P= k / V
So, Pi = ki / Vi
Ki = Pi Vi
= 2.0 x 11.0 = 22.0 atm-L
Thus for Kf
Kf = Pf Vf
= 4.0 x 5.5 = 22.0 atm-L
Thus Ki = Kf
This signify that it obeys Boyles law.
Thus, a certain gas is present in a container obeys Boyles law.
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hello, can someone please help me with this problem
Answer:
chicken tenders and egg rolls and butter fingers
what is the formula for strontium chlorate
Write an equation (use the letters) representing the heat of reaction, ∆H.
The equation representing the heat of reaction in letters is ΔH = q = [tex]cp_{sp}[/tex] x m x (ΔT)
Heat of reaction is also known as Enthalpy of the reaction. It is a measurement used in thermodynamics energy that was produced or released in a reaction. ΔH represents change in heat or enthalpy
Heat of reaction, ΔH = q = [tex]cp_{sp}[/tex] x m x (ΔT)
where,
ΔH and q represents heat of reaction
m represents the mass of the reaction medium
[tex]cp_{sp}[/tex] represents the specific heat capacity
ΔT represents the difference in temperature of the medium
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Condensation is a chemical reaction of _______. It represents _______ producing ______.
Decomposition
Synthesis
One organic molecule and a water molecule
Two organic molecules
One organic molecule
A water molecule
Exchange
Condensation is a chemical reaction of synthesis and represents two organic molecules producing one organic molecule.
What is condensation reaction?Condensation reaction is a reaction of two substances with the simultaneous loss of water or other small molecule.
Condensation reaction is a chemical reaction that synthesizes larger molecules from two or more smaller molecules with the release of water.
An example of condensation reaction is the synthesis of dipeptide (protein) from amino acids building blocks.
Therefore, it can be said that condensation synthesizes larger organic molecules from two smaller ones.
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There are usually more objects at a crime scene than investigators can efficiently collect and analyze.
A.
True
B.
False
Answer:
A. True
Explanation:
How does the formation of an ionic bond differ from the formation of a covalent bond?
1) An ionic bond is where one atom transfers at least one electron from another atom in an attempt to fill its electron shell. A covalent bond is when electrons are shared
between atoms and there is equality between atoms in relation to their electrons.
2) Ionic bonds form by the transfer of electrons. Covalent bonds form by sharing
electrons. In ionic bonding, electrons are completely transferred from one atom to
another. In the process of either losing or gaining negatively charged electrons, the
reacting atoms form ions. Ions that have a positive charge are called cations and the
ones that have a negative charge are called anions. On the other hand, covalent bonds can be formed by any equal or unequal sharing of electrons. The substances formed by ionic bonds are called compounds and those formed by covalent bonds are referred to as molecules.
3) The formation of an ionic bond differs from the formation of a covalent bond by
being so, a covalent bond forms when one electron in the outer electron orbit of each
atom is shared between the two atoms. Covalent has only one electron to be shared
and ionic has more than one electron to be transferred.
(HELP IS NEEDED SOON. THANK U SO MUCH)
Covalent bonds and ionic bonds differ as follows: ionic bonds form by the transfer of electrons. Covalent bonds form by sharing electrons. In ionic bonding, electrons are completely transferred from one atom to
another. In the process of either losing or gaining negatively charged electrons, the
reacting atoms form ions. Ions that have a positive charge are called cations and the ones that have a negative charge are called anions. On the other hand, covalent bonds can be formed by any equal or unequal sharing of electrons. The substances formed by ionic bonds are called compounds and those formed by covalent bonds are referred to as molecules (option 2).
What are ionic bonds?Ionic bonds are a type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.
On the other hand, a covalent bond is a type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.
Ionic bonds occur between metals, which lose electrons, and nonmetals, which gain electrons. Ions with opposite charges will attract one another creating an ionic bond.
Also, covalent bonds form when two atoms of similar charges share electron pairs.
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How many grams are in 105.4 mol of nickel
Answer:
6186.98
Explanation:
105.4 mol of nickel is 6186.98 nickel
The atomic number of an element gives several pieces of information including:Choose all that apply [] the elements color [] the number of protons [] the number of electrons [] the elements position on the periodic table
Atomic numbers are the numbers possessed by an element in a periodic table. These numbers are used to identify an element and their position in the periodic table.
The atomic number of an element is equal to its proton and electron number but not its neutron
Hence we can conclude that the correct information about the atomic number of an element includes:
• The number of protons
• The element position on the periodic table
acetone is a widely used industrial solvent, and the main component in
many fingernail polish removers. The chemical formula is CH3COCH3 (the three
carbons are connected to each other in a chain: C-C-C).
a. Draw the Lewis structure for acetone, and predict the geometry around
each carbon atom.
b. Is the molecule polar or non-polar?
c. What kinds of intermolecular forces exist between acetone molecules?
d. 1-propanol (CH3CH2CH2OH, again, all C atoms are connected in a long chain,
C-C-C-C) boils at 97.2 °C while acetone boils at 56.5 °C. Explain the
difference.
Kinds of intermolecular forces exist between acetone molecules is Hydrogen bond.
A. CH3 -C-CH3.
B. The molecular is nonpolar.
C. Dipole-dipole interactions.
D. CH3-CH₂-OH → 1-proposal if dissolves in water form the strong Hydrogen bonding Acetone with water when Compare with 1-prop and have more strong Hydrogen bonding due to its bending 1-propenal has more boiler point.
Molecules with oxygen atoms nitrogen atoms or ionizable groups -CO2H and -SO3H tend to be polar. A non-polar molecule is a molecule that does not have regions of positive and negative charge. Ethane is an example of a non-polar substance. A bond is considered nonpolar if the electronegativity difference is less than about 0.4.
When things are different at both ends we call them polar. Also, some molecules have positive and negative ends, and when they are present, we call them polar. Otherwise, it is called non-polar. Polar things can attract or repel each other. Opposite charges attract and charges repel.
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Two standard scuba tanks are filled to 200 atm—the first with a volume of 14.2 L and the second with 11.4 L. Assume that the tank regulator delivers 1.5 L of air at 1 atm for each breath. How many breaths could each different tank supply if one used the contents of each tank completely?
Hint: P1V1 = P2V2*Breaths
The number of breadths supplied by the 200 atm scuba tanks, found using Boyle's law, taking the air as an ideal gas are as follows;
First tank with 14.2 L volume delivers 1,893.[tex]\overline 3[/tex] breadths of air
The second tank with 11.4 L volume, delivers 1,520 breadths of air
What is an ideal gas?An ideal gas is a gas that is not subject to particle to particle interactions, and consists of many particles
The given parameters are;
Pressure air in the two scuba tanks, P₁ = 200 atm
Volume of air in the first tank, V₁₁ = 14.2 L
Volume of air in the second scuba tank, V₁₂ = 11.4 L
Volume of air delivered for each breadth, Vₐ = 1.5 L
Pressure of air delivered by the tank regulator, P₂ = 1 atm.
According to Boyle's law, at constant temperature, the pressure of a given mass of gas is inversely proportional to its volume
Mathematically, we have;
P ∝ V
P₁·V₁ = P₂·V₂
The volume occupied by a given number of breadths, n, Vₙ = Vₐ × n
According to Boyle's law, the number of breadths supplied by the first tank is therefore;
P₁·V₁₁ = P₂·Vₐ·n
Which gives;
[tex]n = \dfrac{P_1\cdot V_{11}}{P_2 \cdot V_a}[/tex]
Therefore;
[tex]n = \dfrac{200\times 14.2}{1 \times 1.5}\approx 1893.\overline 3[/tex]
The number of breadths supplied by the first tank is 1,893.[tex]\overline 3[/tex] breadths
Similarly, the number of breadths supplied by the second tank is given by the formula;
P₁·V₁₂ = P₂·Vₐ·n
[tex]n = \dfrac{P_1\cdot V_{12}}{P_2 \cdot V_a}[/tex]
[tex]n = \dfrac{200\times 11.4}{1 \times 1.5}\approx 1893.\overline 3 = 1,520[/tex]
The number of breadths supplied by the second tank is 1,520 breadths
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Help with this fast please
Answer:
6. Al
7. 3
Explanation:
When looking at ionization energies to find the number of valence electrons, look for big jumps in ionization energy. The jump from first to second is big, but it's only about 1200 kj/mole (which is considered to be a medium small jump). This means that the first electron and second electrons are both likely valence electrons (since the energy needed to remove them is relatively small). From second to third, the change in ionization energy is less than 1000 kj/mole. Since the third ionization energy is also quite small, the third electron is also likely to be a valence electron. However, looking at the change in ionization energy from the third to the fourth, the jump/difference in ionization energy is nearly 9000 kj/mole! That's 7 to 9 times the amount of the previous jumps. From this, we can reasonably assume that this is a core electron, which takes lots of energy to remove from an atom. Therefore, the fourth electron is a core electron, and this atom only has 3 valence electrons. Now, we can answer question 7. It is C. From this, look at number 6. Na only has 1 valence electron, Mg only has 2 valence electrons, Si has 4 valence electrons, and only Al has 3 valence electrons. Since this mystery element X has 3 valence electrons and Al also has 3 electrons, Al is the most fit for the data given. So the answer to number 6 is C) Al
tl;dr there is a jump of ionization energy from the 3rd ionization energy to the 4th ionization energy so that means that the 4th electron is a core electron, and the element only has 3 valence electrons. Al has 3 valence electrons
How many moles of air must there be in a bicycle tire with a volume of 1.95 L if it has an internal pressure of 6.30 atm at 17.0°C?
The molecular weight of oxygen gas is 32 grams per mole, and we calculate the weight of the atmosphere based on this estimate.
Solution:
PV = nRT
6.30 x 1.95 = n x 12.285 x 290
n = 0.6226 moles.
The molar weight of oxygen gas is 32 grams, mol on which to estimate the atmospheric weight. Irregular Edges Edges are often jagged chipped or blurred. The pigment can spread to the surrounding skin. Uneven Colors Black brown and tan shades may be present. White, gray red, pink, or blue areas can also be seen.
If the mole is larger than other moles has dirty or uneven edges is uneven in color, or is slightly pink see a doctor for an examination. please give me. Bruises that appear in adulthood should be checked. However, the most worrying sign is the change in the mole. Experts believe that genetic factors, hormonal changes, and sun damage can cause new moles to suddenly appear, but no one knows for sure.
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In a 5.0 g sample of sodium chloride, 39.34% of the compound is sodium. What is the percent by mass of sodium in a 25 g sample of sodium chloride?
The percentage by mass of sodium in a 25 g sample of sodium chloride =39.92%
What is a chemical compound?A chemical compound is made up of two or more elements which are chemically combined together.
For example sodium chloride which contains sodium and chloride are chemically combined together to form sodium chloride as a chemical compound.
The first compound of sodium chloride= 5g
The percentage that is sodium= 39.34%
The second compound of sodium chloride= 25g
The percentage that is sodium= x%
That is = 5g = 39.34%
Therefore quality of sodium in grams;
= 39.34/100× 5
= 0.3934× 5
= 1.967g
Therefore if 5g of NaCl contains 1.967g of Na
25g of NaCl will contain xg
Make xg the subject of formula,
= 25×1.978/5
= 49.45/5
= 9.98g of sodium.
To conver 9.98g to %;
=9.98/25 × 100/1
= 0.3992×100/1
= 39.92% of sodium.
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Using the information given, write the isotopic symbol:
Z= 42
A= 98
Gained one electron
Let us take the isotope as E then Z is its atomic number and A is the mass number. Thus, if Z = 42 and A = 98 then the isotope can be seen as [tex]^{98}_{42}E[/tex].
How are the electrons in an isotope symbol located?Add the antithesis of the charge imbalance to the number of protons to determine the number of electrons.
For instance, a phosphorus isotope with an atomic number of 15 has a -3 charge, meaning that there are three more electrons than protons in that isotope.
How should an isotopic sign be written?The atomic number should be written as a subscript and the mass number (protons + neutrons) should be written as a superscript to the left of the atomic symbol when writing the symbol for an isotope.
Notation for IsotopesStandard, or “AZE,” notation can also be used to describe isotopes, where A stands for the mass number, Z for the atomic number, and E for the element symbol. To the left of the chemical symbol “E,” a superscript denotes the mass number “A,” and a subscript denotes the atomic number “Z.”
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why do liquids retain their volume under pressure
The volume of a liquid is not substantially affected by variations in pressure. Any pressure increase can only slightly shorten the distance between the densely packed molecules, liquids are incompressible.
How does pressure change in liquids?Increased pressure occurs as depth increases. The pressure in a liquid is influenced by the mass of the surrounding water above. Due to the near proximity of the molecules in a liquid, pressure exerts itself in all directions.
How do you explain pressure?"Pressure" is described as the thrust (force) applied to a surface per area. The force to effective area is another way to describe it (over which the force is acting).
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Which of the following pairs of elements are likely to form an ionic compound?
copper and chlorine
cesium and barium
potassium and chlorine
silicon and phosphorus
sodium and neon
oxygen and bromine
The pairs that are likely to form an ionic bond are;
copper and chlorinecesium and bariumpotassium and chlorineWhat is an ionic compound?Let us recall that a compound is formed if we are able to join the atoms of two elements together. There are basically three kinds of bonds that we can have in a substance and these are;
Covalent bondIonic bondMetallic bond.If the two elements are now bonded in the compound the properties of each of the atoms is now modified and what we now have is the singular properties of the compound.
We can see a list of several compounds and we are to find out if the bond that the atoms have between them is an ionic or not. This has been done in the section above and we can see there the compounds that are most likely to have an ionic bond.
Note that in the ionic bond, there is a transfer of electrons from one atom to the other. This can be shown by the use of an arrow. The transfer would always occur from the atom of a metal to the atom of a non metal.
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An object’s displacement is the distance and _____________ of the object’s change in position.
An object’s displacement is the distance and direction of the object’s change in position.
What is displacement?Displacement in physics is the quantity which denotes distance with a directional component.
Displacement and distance are two inter-related terminologies that are often misused, however, they differ being that displacement is a vector quantity while distance is a scalar quantity.
This means that displacement has direction and magnitude, hence, can be defined as the distance and direction of an object’s change in position.
Displacement is denoted by ∆x and is calculated by dividing the change in position by time taken.
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Will Argon, Neon, and Krypton react the same or differently? Explain.
Will Argon, Neon, and Krypton react same
Noble gases only helium and neon are truly inert and the other noble gases will react on a limited scale under very specific conditions and krypton will form a solid with fluorine, and xenon will form a variety of compounds with oxygen and fluorine and the name comes from the fact that these elements are virtually unreactive towards other elements or compounds and they do not react with other element
Neon is a colorless, odorless, unreactive gas and argon is a colorless, odorless, unreactive gas and krypton is a colorless, odorless, unreactive gas
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Which of the following accounts for the differences among the various amino acids
a. the amine group
b. the side chain
c. the acid group
d. a and b
e. b and c
The group that accounts for the difference among the various amino acids is the side chain (option B).
What are amino acids?Amino acids are any chemical molecule that has both an amino and a carboxylic acid functional group.
The antecedents or building blocks of protein molecules are known as amino acids. Ingredients that make up amino acids include:
Amino group (-NH2)Carboxyl group (-COOH)R-groupThe R group, a particular side chain, is also joined to the carbon in each of the 20 amino acids. The shapes, sizes and charges of the R groups vary. As a result, amino acids can be categorized based on the characteristics of their side chains.
All amino acids have the same amino and carboxyl groups; the R group, however, differs for each amino acid.
In nature, there are 20 different amino acids, each of which has an amino and carboxyl group. However, what sets them apart from one another is that they each have a unique R (side) chain.
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Give the formula for dicarbon tribromide. Since there is no way to subscript, use regular numbers in place of subscript (for example, Al2O3). Be sure to use parenthesis only when needed and proper upper and lower case.
Question 6 options:
The correct formula of the dicarbon tribromide molecule is shown as [tex]C_{2} Br_{3}[/tex].
What is the chemical formula?The chemical formula is the representation of a compound on paper. It is the way by means we are able show the way that atoms of a compound are connected to each other. We often use this method to show the representation of a compound in way that is somewhat intelligible to someone who needs to understand it.
We are now going to try to see how we could be able to find the correct formula of the compound knowing all the subscripts required in the process.
Now, most importantly, the formula must show the number of atoms of each of the elements that are in the compound. Looking at what we have, we are asked to find the formula of the compound dicarbon tribromide. We already know that there would be two atoms of carbon and three atoms of bromine in the compound.
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Which of the following factors can affect the solubility of a substance? Select all that apply.
The following factors can affect the solubility of a substance is temperature and pressure
Solubility is the maximum amount of substances that will dissolve in a given amount of solvent at specific temperature and solubility is the characteristics property of specific solute and solvent combination and different substances has greatly different solubility's and there are two direct factor that affect the solubility and they are temperature and pressure and temperature affect solubility of both solid and gases but pressure only affect the solubility of gases
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Which of the following is TRUE if ΔEsys = -100 J?
The statement that is true if the ΔEsys = -100 J is that the system looses 100J of energy which is gained by the surroundings.
What is the energy of the system?Note that the study of energy is what we call thermodynamics. We should note that according to the laws of thermodynamics, energy can not be created nor destroyed but can be converted from one form to another.
This implies that the energy that is lost by the system must be gained by the surroundings since there can never be energy that goes to waste in the system.
Recall that the universe is composed of the system and the surroundings and the energy that is lost by the system must be gained by the surroundings and vice versa. This would now be our guide in deciding which statement is right above from what we have in the question here.
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