2. When water flows over limestone, is dissolved, creating hard water.
O sodium
O chlorine
O carbon
O calcium
Answers
The correct option is O calcium
What are all the products created when the hydronium ion and limestone (CaCO3) react? In water, hydrogen ions interact with limestone (CaCO 3). Water always contains them since it goes through autoprotolysis: H + (aq) + OH - = H 2 O (l) (aq) Limestone will react and erode more readily the more acidic the water is.
When limestone is heated (calcined), it produces carbon dioxide and calcium oxide (quick lime). When this CaO, or calcium oxide, is combined with water, lime water (or calcium hydroxide), which releases heat, results. An EXOTHERMIC REACTION has occurred. When limestone and water are together, nothing happens. How does calcite purify water?
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Related Questions
Which of the following is a liquid?
milk
oxygen
cheese
Answers
What do you think would happen if you threw a block of polystyrene (styrofoam™) into the water?.
Answers
Answer:
It will float
Explanation:
Polystyrene is not dense and its light and full of air. It will float.
Is an aqueous solution of NaHSO4 acidic, basic or neutral? Support your answer with a chemical equation. Hint: focus on HSO4- dissociation
Answers
An aqueous solution of sodium bisulfate (NaHSO4) is acidic. Sodium bisulfate dissociates in water to form the bisulfate ion (HSO4-) and the sodium ion (Na+). This reaction can be represented by the following chemical equation:
NaHSO4 (s) → Na+ (aq) + HSO4- (aq)
The bisulfate ion is a weak acid, and it dissociates further in water to form the sulfate ion (\(SO4^{2-}\)) and the hydrogen ion (H+):
HSO4- (aq) → H+ (aq) + SO42- (aq)
This additional dissociation of HSO4- increases the concentration of H+ ions in the solution, making the solution acidic. The presence of H+ ions in the solution means that the solution has a pH of less than 7, which is the definition of an acidic solution.
What is an aqueous solution?
An aqueous solution is a sort of mixture in which one or more solutes have been dissolved in water as the solvent. Any kind of material, including salts, acids, bases, and sugars, can serve as solutes. The word "aqueous" describes a solution's water content. These kinds of solutions are prevalent in biology and chemistry and are essential to numerous industrial and natural processes.
An aqueous solution is one in which water serves as the solvent. In chemical equations, it is often represented by adding to the appropriate chemical formula. For instance, Na⁺ + Cl⁻ might be used to depict a solution of table salt, or sodium chloride, in water.
Water, which makes up around 70% of the mass of the human body and is necessary for life, serves as the solvent in aqueous solutions.
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When energy changes from one form to another, some energy is always changed to
ОА.
sound.
ОВ.
heat.
Ос.
light.
OD
electricity
Answers
Answer:
OB heat
Explanation:
Hope this helps
Hydrogen sometimes is “blank” an electron and sometimes it has an “blank” electron.
Answers
Hydrogen sometimes is missing an electron and sometimes it has an extra electron.
Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.
What are electrons?Electrons are defined as a subatomic particle with a negative charge that makes up the nucleus of an atom along with protons and neutrons. For scientists, it can be challenging to monitor them because of how quickly they spin. The tiniest particles in an atom, you can put 2000 of them into a proton, they are drawn to the positive charge of the protons.
Because it has no neutrons in its nucleus, hydrogen (particularly hydrogen -1) is unusual. There is only one proton in the nucleus of hydrogen. The only element without neutrons is this one. Although it has a single electron orbiting its nucleus as well, hydrogen typically contributes this electron to form a single, positively charged proton instead.
Thus, Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.
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The temperature of a sample of gas is 350K at 2.5 atm and 45.0 L. What is the new volume at standard temperature and pressure?
Answers
Answer:
The answer for V2 is 144 to the nearest whole number
Explanation:
P1V1/T1 = P2V2/T2.
P1=2.5atm
V1=45L
T1=350K
P2=1 atm at standard pressure
V2=?
T2=273 at standard temperature
P1V1/T1 = P2V2/T2.
V2=P1V1T2/P2T1
V2=2.5×45×350/1×273
V2=144.23
V2=144 to the nearest whole number
write one word for the following short form of an element
Answers
Answer:
symbol?
Explanation:
A copper mug that can hold 290 cm
3
of liquid is filled to the brim with ethanol at 20.0
∘
C. If you lower the temperature of the mug and ethanol to −50.0
∘
C, what is the maximum additional volume of ethanol you can add to the mug without spilling any? (Ethanol remains a liquid at temperatures down to −114
∘
C.) Assume the coefficient of volume expansion for ethanol is 110×10
−5
K
−1
. Express your answer with the appropriate units.
Answers
To find the maximum additional volume of ethanol that can be added to the mug without spilling any when the temperature is lowered from 20.0°C to -50.0°C, we need to consider the expansion of the copper mug and the ethanol.
Given:
Initial volume of the mug, V_initial = 290 cm^3
Change in temperature, ΔT = -50.0°C - 20.0°C = -70.0°C
Coefficient of volume expansion for ethanol, β_ethanol = 110×10^-5 K^-1
First, we need to calculate the change in volume of the mug due to the change in temperature. The coefficient of volume expansion for copper is typically around 50×10^-6 K^-1.
ΔV_mug = V_initial * β_mug * ΔT
= 290 cm^3 * (50×10^-6 K^-1) * (-70.0°C)
Next, we calculate the change in volume of the ethanol using its coefficient of volume expansion:
ΔV_ethanol = V_initial * β_ethanol * ΔT
= 290 cm^3 * (110×10^-5 K^-1) * (-70.0°C)
The maximum additional volume of ethanol that can be added without spilling is equal to the change in volume of the mug minus the change in volume of the ethanol:
Additional volume of ethanol = ΔV_mug - ΔV_ethanol
Finally, we can calculate the value:
Additional volume of ethanol = (290 cm^3 * (50×10^-6 K^-1) * (-70.0°C)) - (290 cm^3 * (110×10^-5 K^-1) * (-70.0°C))
Remember to include the appropriate units in the final answer.
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A copper mug that can hold 250 cm3 of liquid is filled to the
brim with ethanol at 20.0°C. If you lower the temperature of the mug
and ethanol to -50.0°C, what is the maximum additional volume of
ethanol you can add to the mug without spilling any?
The distinct odor of the seashore at low tide results in part from the presence of dimethylsulfide (CH2SCH3). A similar molecule known as dimethyl ether (CH3OCH3) is often compared with dimethylsulfide. What are their shapes and which substance has the stronger intermolecular forces? Their standard heats of vaporization are 28 kJ/mol and 23 kJ/mol, respectively. Heat of vaporization is the energy required to vaporize one mole of the substance from its liquid state at its normal boiling point. A) Their shapes are linear (with S or O being the central atom). With neither of the compounds being distinctively polar, the slightly-higher polarity of dimethylsulfide yields stronger dispersion forces than dimethyl ether. B) Their shapes are bent (with S or O being the central atom). With neither of the compounds being distinctively polar, the dipole-dipole forces among dimethysulfide molecules are stronger than among dimethyl ether. C) Their shapes are linear (with S or O being the central atom). With dimethylsulfide being less polar than dimethyl ether, the dipole-dipole forces among dimethyl ether molecules are stronger than in dimethylsulfide. D) Their shapes are bent (with S or O being the central atom). With dimethylsulfide being less polar than dimethyl ether, the dipole-dipole forces among dimethyl ether molecules are stronger than in dimethylsulfide. E) Their shapes are bent (with S or O being the central atom). With neither of the compounds being distinctively polar, the higher polarizability of dimethylsulfide yields stronger dispersion forces than dimethyl ether.
Answers
The answer is D) Their shapes are bent (with S or O being the central atom). With dimethylsulfide being less polar than dimethyl ether, the dipole-dipole forces among dimethyl ether molecules are stronger than in dimethylsulfide.
The shapes of both dimethylsulfide (CH2SCH3) and dimethyl ether (CH3OCH3) are bent, with either sulfur (S) or oxygen (O) as the central atom. In dimethylsulfide, the central atom is sulfur (S), while in dimethyl ether, it is oxygen (O).
Both dimethylsulfide and dimethyl ether do not possess significant polarity. However, dimethyl ether (CH3OCH3) has a greater dipole moment than dimethylsulfide (CH2SCH3) due to the greater electronegativity difference between oxygen and carbon atoms compared to sulfur and carbon atoms.
Dipole-dipole forces are intermolecular forces that occur between the positive end of one polar molecule and the negative end of another polar molecule. In this case, since dimethyl ether has a slightly higher polarity than dimethylsulfide, the dipole-dipole forces among dimethyl ether molecules are stronger than in dimethylsulfide.
Dispersion forces, also known as London forces, are intermolecular forces that occur between all molecules, polar or nonpolar, due to temporary fluctuations in electron distribution.
The strength of dispersion forces depends on the polarizability of the molecule, which is related to the ease with which the electron cloud can be distorted. Dimethylsulfide, with its larger sulfur atom, has a higher polarizability and thus stronger dispersion forces compared to dimethyl ether.
Therefore, considering the shapes and the intermolecular forces involved, dimethyl ether (CH3OCH3) has stronger dipole-dipole forces among its molecules compared to dimethylsulfide (CH2SCH3).
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The electron configuration of a neutral atom of calcium is shown.
1s2 2s2 2p6 3s2 3p6 4s2
How many valence electrons are in the atom?
A 2
B 4
C 8
D 20
Answers
In calcium, the valence shell is n=4. The valence electrons' orbital is 4s. Consequently, there are 2 electrons in the valence shell.
What is an example of valence?The quantity of hydrogen atoms that interact explicitly or implicitly with one of an element's atoms is known as its valency. As an illustration, ammonia gas is created when one particle of nitrogen and three elements of hydrogen mix.
The meaning of "valence of 2":An element with a valence factor of 1 will typically react to lose a electron in order to attain a complete outer shell. Elements in group two are given a valence value of 2. A group ii element with a potential number of two will urgent action to lose electron pair in order to attain a complete outer shell.
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The enthalpy of combustion of carbon and carbon monoxide are −393.5 and −283 kJ/mol respectively. The enthalpy of formation of carbon monoxide per mole is:A.110.5 kJB.676.5 kJC.-676.5 kJD.-110.5 kJ
Answers
The enthalpy of formation of carbon monoxide per mole is -110.5 kJ/mol. This can be calculated using the equation: ∆Hf(CO) = ∆Hcomb(C) + 0.5∆Hcomb(O2) - ∆Hcomb(CO). Substituting the given values and solving for ∆Hf(CO), we get -110.5 kJ/mol.
The enthalpy of formation of a compound is defined as the enthalpy change when one mole of the compound is formed from its constituent elements in their standard states. The enthalpy of combustion of carbon and carbon monoxide are given. Using Hess's law and the above equation, we can calculate the enthalpy of formation of carbon monoxide. The negative sign indicates that the formation of carbon monoxide is exothermic and releases heat.
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#27. When two amino acids are joined via a peptide bond, what is the mass of the byproduct of the reaction?
Answers
When two amino acids join via a peptide bond, the mass of the byproduct, which is a water molecule, is approximately 18 atomic mass units.
When two amino acids are joined via a peptide bond, a byproduct is formed as a result of the reaction. This process, called dehydration synthesis, involves the removal of a water molecule (H2O) as the amino acids form the peptide bond.
To create a peptide bond, the carboxyl group (COOH) of one amino acid reacts with the amino group (NH2) of another amino acid. During this reaction, the carboxyl group loses a hydroxyl group (OH) while the amino group loses a hydrogen atom (H). The two amino acids are then linked by the peptide bond, and the released hydroxyl group and hydrogen atom combine to form a water molecule.
The mass of the byproduct, which is a water molecule, can be calculated by adding the atomic masses of its constituent atoms.
A water molecule consists of one oxygen atom and two hydrogen atoms. The atomic mass of oxygen is approximately 16 atomic mass units (amu), and the atomic mass of hydrogen is approximately 1 amu. Therefore, the total mass of a water molecule is:
1 oxygen atom × 16 amu/oxygen atom + 2 hydrogen atoms × 1 amu/hydrogen atom = 16 amu + 2 amu = 18 amu.
In summary, when two amino acids join via a peptide bond, the mass of the byproduct, which is a water molecule, is approximately 18 atomic mass units.
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7. A sample of a compound that contains only chlorine and oxygen reacts with excess hydrogen to produce 0.233 grams of hydrochloric acid and 0.403 grams of water. Determine the empirical formula of this compound.
Answers
Answer:
ClxOy + H2 > HCl + H2O
HCl = 0.233/37 = 0.006 mol H2O = 0.403/180.02 mol
HCl = 0.006/0.022 H2O = 0.022/0.006
= 1 = 4
Cl2O4 + 5H2 > 2HCl + 4H2O
I'm think that's the answer
Someone help please?- Ill give brainilist.
Answers
Answers:
1. Carbon is to organic as silicon is to inorganic
2. Sugar is to carbohydrate as oil is to lipid
why can't a beaker be used to measuring the volume of a liquid
Answers
Answer:
It doesn't have measure marks on it.
If you wanted to mix pure methane with water and end up with 90 gallons of 60% methane, how many gallons of each should you use?
You should use ________ gallons of water and _________ gallons of methane
Answers
To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.
Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.
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what is the orbital hybridization of a central atom that has two lone pairs and bonds to three other atoms? select the single best answer.
Answers
The sp3 hybridization allows these molecules to have a tetrahedral shape with a bond angle of approximately 109.5 degrees.
The orbital hybridization of a central atom that has two lone pairs and bonds to three other atoms is sp3. This is because the central atom requires four orbitals to accommodate the two lone pairs and
the three bonds. The hybridization process involves the mixing of the s and p orbitals to form four hybrid orbitals, which are then arranged in a tetrahedral geometry around the central atom.
The lone pairs occupy two of the hybrid orbitals, while the remaining three hybrid orbitals bond with the three other atoms. This type of hybridization is commonly observed in molecules such as ammonia (NH3) and water (H2O), where the central atom has two lone pairs and bonds to three other atoms.
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Given 3. 82g of (NH4)2O find how many atoms of (NH4)2O
Answers
Answer: 4.41*10^23 atoms
Explanation:
3.82*(6.02*10^23)/52.10= 4.41*10^23 atoms
N*2=14.01*2=28.02
H*8= 1.01*8= 8.08
O*1=16.00*1=16.00
Add them together to get 52.10 g
chlorophyll is important in plants because why
Answers
Answer: to absorb light
Explanation:
Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.
Answer:
It helps in the synthesis of carbohydrates that serves as food for the entire plant by a process called PHOTOSYNTHESIS.
Explanation:
Chlorophyll's job in a plant is to absorb light i.e usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose i.e a type of sugar molecules need in plants.
Chlorophyll is found in virtually all photosynthetic organisms, including green plants, cyanobacteria, and algae.
Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements.
C :
H:
N:
O:
P:
CI:
Answers
Answer:
Look at the screenshot below.
Those are your answers!
Good Luck.
Explanation:
The number of valence electrons for neutral atoms is the same as the number of the atom's main group.A periodic table element's column can be used to determine its main group number.For instance, carbon, which belongs to group 4, has four valence electrons.
Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements?
This rule states that each group of elements has one valence electron, two valence electrons in group 2, three valence electrons in group 13, four valence electrons in group 14, and so on. C : Six electrons make up the atom of carbon: four valence (outermost shell) electrons in the 2s and 2p orbitals, and two inner shell (core) electrons in the 1s orbital. H : As the initial element, hydrogen has an electron configuration of 1s1.Its valence shell only contains one electron.The outermost electrons or those with the highest energy level are called valence electrons. N : The periodic table's Group 15 is headed by nitrogen, which has either 3 or 5 valence electrons. O : On the periodic table, column 6 contains oxygen (symbol O).Its valence electrons number six.To obtain an octet, two bonds must be created. Ci : If chlorine removes one of its seven valence electrons, it will have eight (an octet).When chlorine gains one electron, its electron configuration resembles that of argon.If chlorine had given up all seven of its valence electrons and sodium had taken them, the octet rule would have been met.To learn more about periodic table refer
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What is electric current?
Please Help Me.
Answers
Answer:
electric current is the rate of charge flow past a given point in an electric circuit.
Explanation:
Hopefully this is the answer
Answer:An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge past a region.
Explanation:
Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. The balanced chemical equation is shown below. Cu 2AgNO3 Right arrow. Cu(NO3)2 2Ag The molar mass of Cu is 63. 5 g/mol. The molar mass of Ag is 107. 9 g/mol. What mass, in grams, of Ag is produced from a reaction of 31. 75 g of Cu? 26. 95 grams 107. 9 grams 215. 91 grams 431. 82 grams.
Answers
107.9 g of Ag is produced from a reaction of 31. 75 gram of Copper.
How we calculate mass from the moles?Mass of any substance will be calculated from its moles as:
n = W/M, where
W = required mass
M= molar mas
Given chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
From the stoichiometry of the reaction, it is clear that:
1 mole of Cu = produce 2 moles of Ag
Given mass of Cu = 31.75g
Molar mass of Cu = 63.5g/mol
Moles of Cu = 31.75g / 63.5g/mol = 0.5 moles
0.5 moles of Cu = produce 2×0.5 = 1 mole of Ag
Molar mass of Ag = 107.9g/mol
Required mass of Ag = 1mol × 107.9g/mol = 107.9 g
Hence, option (2) is correct i.e. 107.9 g of Ag is produced.
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What is the volume of 8.8g of carbon dioxide at STP?
Answers
The volume of 8.8g of carbon dioxide at STP is 4.38 L.
At STP, what is 22.4 L?1 mole of any gas will take up 22.4 L of space at standard temperature and pressure (STP). A balanced chemical equation and the Ideal Gas Law can be used to determine the amount or mass of gas consumed or created in a chemical process.
n = m/M
where m is the molar mass of carbon dioxide and M is its mass in terms of molecules.
Considering that the molar mass of carbon dioxide is 44.01 g/mol:
n = 8.8 g / 44.01 g/mol
n = 0.1998 mol
Next, we can plug in the values of n, R, P, and T into the ideal gas law and solve for V:
V = (nRT)/P
V = (0.1998 mol x 0.0821 L·atm/(mol·K) x 273.15 K) / 1 atm
V = 4.38 L
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What is the first thing you should do when you enter a laboratory?
Answers
Follow safety instructions such as goggles, gloves, coats, etc.
a spontaneous reaction has a ________ value of δg and is favored by a ________ value of δh and a ________ value of δs .
Answers
A spontaneous reaction has a negative value of δG and is favoured by a negative value of δH and a positive value of δS. These factors work together to drive the reaction forward and make it energetically favourable.
A spontaneous reaction has a negative value of δG, indicating that the reaction is energetically favorable and can occur spontaneously without the input of external energy. This negative value of δG is a result of the combination of the enthalpy change (δH) and the entropy change (δS) of the system.
The enthalpy change (δH) is the heat released or absorbed during a chemical reaction. A spontaneous reaction is favored by a negative value of δH, indicating that the reaction releases heat and is exothermic. This is because exothermic reactions have a lower potential energy than the reactants, making the products more stable.
The entropy change (δS) is the measure of the disorder or randomness of the system. A spontaneous reaction is favored by a positive value of δS, indicating that the reaction increases the disorder of the system and creates more freedom of motion for the molecules involved. This is because reactions that result in more disordered products have a greater number of ways to arrange themselves, leading to a more favourable state.
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What is Decomposition Reaction
Answers
Answer:
Explanation:
Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.
The decomposition reaction can be represented by the general equation:
AB → A + B
Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.
There are different types of decomposition reactions, including:
Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):
CaCO3 → CaO + CO2
Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):
2H2O → 2H2 + O2
Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:
Cl2 → 2Cl
These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.
Answer:
Explanation:
reaction in which a compound breaks down into simpler substances or elements
How do bees help plants in reproduction?
A.
They transfer pollen from one flower to another.
B.
They collect nectar from flowers.
C.
They carry flowers to different plants.
D.
They spread the flower’s fragrance to attract other insects.
Answers
In an ecosystem, bees help plants in reproduction as they transfer pollen from one flower to another.
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .The population keeps increasing by means of reproduction.
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explain why a carboxylate-containing compound such as acetate linked to coenzyme a (coa) has a higher free energy of hydrolysis than does a carboxylate- containing compound linked to an alcoho
Answers
When a carboxylate-containing compound linked to coenzyme A (such as acetate) is hydrolyzed, the resulting product has a higher free energy of hydrolysis than does a carboxylate-containing compound linked to an alcohol.
Free energy is the amount of energy needed to bring a molecule from its lowest-energy state to its highest-energy state. This property can be used to determine whether or not a molecule will break apart or remain intact under certain conditions.
In this example, if you added enough acetate to your reaction mixture, it would be more likely for the reactants to break apart because they have more free energy available in their reactant states.
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one of the reasons absorbance is so useful for chemists is because it allows us to find the concentration of a solution if we know the molar absorptivity. if the absorbance of a new blue dye solution is 0.96 what is the concentration of that solution in
Answers
Absorbance is a measure of how much light a substance absorbs and is often used by chemists to determine the concentration of a solution.
This is because the absorbance of a substance is directly proportional to its concentration, if the molar absorptivity is known. The molar absorptivity is a property of the substance and is usually provided in literature or can be determined experimentally.
In this case, if the absorbance of a new blue dye solution is 0.96 and the molar absorptivity is known, the concentration of the solution can be calculated using the Beer-Lambert Law (A = ε * b * c). This law states that the absorbance (A) of a solution is equal to the product of the molar absorptivity (ε), the path length (b) of the cuvette, and the concentration (c) of the solution.
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Q: Arrange the element according to the increase radius or size
1. Na, K, Cs Fr, Rb
2. Ca, Sr, Ba, Ra, Mg
Answers
Answer:
Refer to the periodic table to do this.
Explanation:
1. Na, K, Cs Fr, Rb
Sodium, Potassium, Cesium, Francium, Rubidium
3, 4, 6, 7, 5
Ascending order: Na, K, Rb, Cs, Fr
2. Ca, Sr, Ba, Ra, Mg
Calcium, Strontium, Barium, Radium, Magnesium
4, 5, 6, 7, 3
Ascending Order: Mg, Ca, Sr, Ba, Ra
When doing the electronic configuration of the elements, count how many number of divides it has. For example, Na(Sodium) has 11 electrons and it is divided like this: 2,8,1. So it divides into 3 parts so there will 3 shells for sodium.
Hopefully this helps!!