1.85 liters of oxygen gas will react with 2.50 liters of NO gas at 320 K and 680 torr.
Given:
T = 320 K
Convert the pressure of 680 torrs to atm by dividing by 760 (since 1 atm = 760 torrs):
P = 680 torr / 760 torr/atm
= 0.8947 atm
For NO gas:
P(NO) = 0.8947 atm
V(NO) = 2.50 L
T = 320 K
R = 0.0821 L·atm/(mol·K)
Use the ideal gas law equation:
PV = nRT
Where:
P = pressure (in atm)
V = volume (in liters)
n = number of moles
R = ideal gas constant (0.0821 L·atm/(mol·K))
T = temperature (in Kelvin)
Rearrange the ideal gas law equation to solve for the number of moles:
n = PV / RT
n(NO) = (0.8947 atm × 2.50 L) / (0.0821 L·atm/(mol·K) × 320 K)
n(NO) = 0.1074 mol
According to the balanced chemical equation, the stoichiometric ratio between NO and O₂ is 2:1. Therefore, the number of moles of oxygen required will be half of the moles of NO gas:
n(O₂) = 0.1074 mol / 2
n(O₂) = 0.0537 mol
P(O₂) = 0.8947 atm
T = 320 K
R = 0.0821 L·atm/(mol·K)
n(O₂) = 0.0537 mol
V(O₂) = (n(O₂) R T) / P(O₂)
V(O₂) = (0.0537 mol × 0.0821 L·atm/(mol·K) × 320 K) / 0.8947 atm
V(O₂) = 1.85 L
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Which fuels would you take on a camping trip? Explain your choices.
Answer:
biofuel as it have many benefits and are emitted with greater advantages
given the equation 2mno4− 5so32−→2mn2 5so42− 3h2o how many h ions should be added to the left side to balance the hydrogen atoms? express your answer as an integer.
To balance the hydrogen atoms in the equation 2MnO₄⁻ + 5SO₃²⁻ → 2Mn²⁺ + 5SO₄²⁻ + 3H₂O, 6 H⁺ ions should be added to the left side.
In the given equation, the goal is to balance the hydrogen atoms by adding H⁺ ions to the left side.
1. Count the hydrogen atoms on the left side of the equation: There are 3 hydrogen atoms in the water molecules (H₂O) on the right side.
2. Count the hydrogen atoms on the right side of the equation: There are no hydrogen atoms in MnO₄⁻ or SO₃²⁻ ions.
3. Compare the number of hydrogen atoms on both sides: There are 3 hydrogen atoms on the right side, but none on the left side.
4. Balance the hydrogen atoms: To balance the hydrogen atoms, we need to add 3 H⁺ ions to the left side of the equation.
Therefore, the equation should be balanced by adding 6 H⁺ ions to the left side:
2 MnO₄⁻ + 5 SO₃²⁻ + 6 H⁺ → 2 Mn²⁺ + 5 SO₄²⁻ + 3 H₂O
To balance the hydrogen atoms in the equation 2MnO₄⁻ + 5SO₃²⁻ → 2Mn²⁺ + 5SO₄²⁻ + 3H₂O, 6 H⁺ ions should be added to the left side.
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An experiment was set up as diagrammed below to measure the amount of O2 (red) and CO2 (blue) over time using live Spinach leaves and sensor probes for these gases. The results from this experiment are graphed for you. SARRON GOOD GNYGA fo a Figure 1 0.8- 06 04- 10 15 Time (min) 205 204 203 202 201 0 10 15 Time (min) (a) State which metabolic process occurred in this apparatus. (b) Explain the graphed results related to that process.
The metabolic process that occurred in the apparatus of the experiment given in the question is photosynthesis. The graphed results of the experiment are related to the process of photosynthesis.
Photosynthesis is the process in which the green plants use the energy of sunlight to convert carbon dioxide and water into glucose and oxygen. In this process, chlorophyll pigment, present in the chloroplasts of the plant cells, captures the energy of sunlight. This captured light energy is used to convert water and carbon dioxide into oxygen and glucose.
In the experiment mentioned above, the metabolic process that occurred in the apparatus is photosynthesis. It is because spinach leaves were used in the experiment to observe the amount of oxygen (O2) and carbon dioxide (CO2) present in the leaves.
The graphed results of this experiment show that the amount of oxygen in the leaves increased over time while the amount of carbon dioxide decreased. This is because the leaves absorbed carbon dioxide from the air and converted it into glucose and oxygen through the process of photosynthesis. As a result, the amount of oxygen increased over time, and the amount of carbon dioxide decreased. Hence, it can be concluded that the graphed results of the experiment are related to the process of photosynthesis.
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How many molecules are in 10 grams of sugar?
Answer:
A sugar cube is supposed to be equivalent to a teaspoon of sugar. A teaspoon of sugar is about 4.2 g. Table sugar is composed of sucrose, which is a disaccharide of glucose and fructose, with a molar mass of 342.3 g/mol. This means a sugar cube contains (4.2 / 342.3 =) 0.0123 mol of sucrose, or (0.0123 x 6.022 x 10^23 =) 7.39 x 10^21 molecules of sucrose. As one molecule of sucrose contains one molecule of glucose and one molecule of fructose, then there about 7,400 million, million, million molecules of glucose in a sugar cube.
explanation:
HAHA d ko alam kung tama yan
Which of the following is/are TRUE about neutrons? (check ALL that are true)
1)They were observed and measured directly, like protons and electrons were.
2)They have a neutral charge.
3)The major clue to their existence was extra mass in atoms that protons and electrons could not account for.
4)They are located in the nucleus.
Option (2), (3), and (4) are true about neutrons. They have a neutral charge, the major clue to their existence was extra mass in atoms that protons and electrons could not account for, and they are located in the nucleus.
Neutrons are particles that have no electrical charge but have a mass that is slightly greater than that of protons. In atoms, neutrons are found in the nucleus. In the following, I will explain which of the following is/are TRUE about neutrons.The neutrons were discovered by the English physicist James Chadwick in 1932. Chadwick directed alpha particles into a thin sheet of beryllium and measured the energies and trajectories of the particles that were emitted. Some of these particles had the same energy as protons, which led Chadwick to conclude that they were neutral and had the same mass as protons. Chadwick had discovered neutrons, which were the last of the three basic subatomic particles to be discovered. The discovery of neutrons was a significant event in the history of physics because it resolved a mystery about the structure of atoms.The following are the TRUE statements about neutrons:They have a neutral charge, meaning they do not have any charge.The major clue to their existence was extra mass in atoms that protons and electrons could not account for. The extra mass of the atoms came from the neutrons in the nucleus.They are located in the nucleus. In atoms, neutrons are found in the nucleus along with protons.
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What will be the aproximate final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M? A. 96 mL B. 25 mL C. 86 mL D.1.38 x 10^2 mL
The correct option is (C). The approximate final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).
To find the final volume of the solution, we can use the formula:
C1V1 = C2V2
Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
Plugging in the values we know, we get:
(8.25 M) (25 mL) = (2.40 M) (V2)
Solving for V2, we get:
V2 = (8.25 M x 25 mL) / 2.40 M
V2 = 86.25 mL
Therefore, the approximate final volume of the solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).
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What are amylose and amylopectin? How do they differ from glycogen?
Amylose and amylopectin are components of starch in plants, while glycogen is the primary carbohydrate storage molecule in animals. The key differences lie in their structures, solubility, and functions in the respective organisms.
Amylose and amylopectin are both types of polysaccharides, or complex carbohydrates, found in plants. They are composed of glucose units linked together by glycosidic bonds.
Amylose is a linear molecule consisting of glucose units linked together by alpha-1,4 glycosidic bonds. It has a helical structure, which makes it more compact than amylopectin. It is found in plants such as rice, potatoes, and corn.
Amylopectin, on the other hand, is a branched molecule consisting of glucose units linked together by alpha-1,4 and alpha-1,6 glycosidic bonds. It has a highly branched structure, which makes it more easily accessible to enzymes for digestion. It is found in plants such as wheat, barley, and oats.
Glycogen is a highly branched polysaccharide found in animals and some bacteria. It is structurally similar to amylopectin but has more frequent alpha-1,6 linkages, making it even more highly branched. Glycogen serves as a storage form of glucose in animals and is found primarily in the liver and muscle tissue.
In summary, amylose and amylopectin are plant-based polysaccharides that differ in their degree of branching, while glycogen is an animal-based polysaccharide that is even more highly branched than amylopectin.
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Which property is dependent only on the atomic structure of the compound? *
total thermal energy
melting point
volume
mass
I think its mass of volume
what molecule releases energy to power the transport work across cell membranes?
The molecule that releases energy to power the transport work across cell membranes is adenosine triphosphate.
The molecule that releases energy to power the transport work across cell membranes is adenosine triphosphate, commonly known as ATP. ATP is a high energy molecule that serves as the primary energy currency of cells.
ATP stores energy in its phosphate bonds, and when these bonds are broken through hydrolysis, energy is released. The hydrolysis of ATP results in the formation of adenosine diphosphate (ADP) and inorganic phosphate. This process releases energy that can be utilized by various cellular processes, including the active transport of ions and molecules across cell membranes.
The energy released from ATP hydrolysis is harnessed by specific transport proteins embedded in the cell membrane, such as ATP-powered pumps and carriers. These proteins use the energy from ATP to transport substances against their concentration gradient, maintaining the concentration gradients necessary for cell function.
Overall, ATP acts as an energy carrier, providing the necessary energy to fuel active transport processes and maintain cellular homeostasis.
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Being able to curl your tongue is a recessive trait (t), while not being able to curl your tongue is a dominant trait (T).
Having curly hair is also a recessive trait (s), while having straight hair is a dominant trait (S).
Parent 1 can curl their tongue (tt) and also has straight hair (Ss). Parent 2 cannot curl their tongue (TT) and has
curly hair (ss). In your notebook, perform a dihybrid cross for these traits. Parent 1: ttSs Parent 2: TTSS
13
What are the Parent 1 gametes? (HINT: FOIL. There will be 4 genotypes)
14
What percent of offspring can curl tongue and have straight hair?
15
What percent of offspring cannot curl tongue and have curly hair?
the amount of dissolved solids (i.e., salinity) at any point in the ocean is determined by the balance between delivery of fresh water (river discharge, rain) and evaporation. where would you expect the highest level of dissolved solids (i.e., highest salinity)?
The expected highest level of dissolved solids salinity is in the tropics.
Primary salinity takes place clearly in soils and waters. Examples of naturally happening saline regions consist of salt lakes, salt pans, salt marshes, and salt residences. Secondary salinity is salting that outcomes from human sports, usually land development and agriculture.
Dissolved solids input the oceans from the chemical weathering of rock on land, from volcanic eruptions, and from chemical reactions between seawater and newly formed sea-ground rocks. one of the biggest variations between ocean water and freshwater is the high concentration of salts in ocean water.
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Disclaimer:- your question is incomplete, please see below for the complete question.
A. Near the equator
B. At high latitudes
C. In the tropics
During a process called photoact, ________ give up an electron as a part of the light-dependent reactions.
Answer:
Chloroplasts?
Explanation:
What happens to temperature if pressure goes up and volume remains the same?
What happens to temperature if pressure goes down and volume remains the same?
What happens to pressure if volume remains the same but temperature goes up?
What happens to pressure if volume remains the same but temperature goes down?
What happens to pressure if volume goes up and temperature remains the same?
What happens to pressure if volume goes down and temperature remains the same?
What happens to volume if pressure is held constant but temperature goes up?
What happens to volume if pressure is held constant but temperature goes down?
Answer: 1) The temperature is proportional to volume
2) The temperature is proportional to volume
3) The pressure increases
4) The pressure decreases
5) Less collisions
6) More collisions, which means more pressure
7) The volume does not change
8) The volume does not change.
Explanation:
in water, 1 mol of li2co3 (aq) will dissociate into which ions?
1 mol of Li₂CO₃ (aq) will dissociate into two Li⁺ ions and one CO₃²⁻ ion. When Li₂CO₃ dissolves in water, the molecules of the salt separate and the Li⁺ and CO₃²⁻ ions are formed.
The two Li⁺ ions become surrounded by water molecules, forming hydrated ions. The CO₃²⁻ ions are not hydrated, so they remain as free ions in solution. The ionic bonding between the Li⁺ and CO₃²⁻ ions is broken due to the strong polarizing power of the water molecules.
The Li⁺ and CO₃²⁻ ions then move freely in the solution due to the electrostatic repulsive forces between them. These ions also interact with the water molecules and the other ions present in the solution.
The Li⁺ and CO₃²⁻ ions are then further dispersed throughout the solution, forming a homogeneous solution of the salt.
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Use the chart to determine which pairs of atoms are arranged in the correct order according to increasing bond polarity?
A. H-CI
B. H-S
C. H-O
D. H-F
The correct order of bond polarity is;
H- S < H - O < H- Cl < H -F
What is bond polarity?Bond polarity refers to the distribution of electrons in a covalent bond between two atoms. In a covalent bond, atoms share one or more pairs of electrons in order to achieve a stable electron configuration.
In some cases, the shared electrons are not equally shared between the two atoms, leading to a bond in which one atom has a greater share of the electrons than the other. This results in a partial negative charge on one end of the bond and a partial positive charge on the other end, creating a separation of charge known as a dipole. The bond is then said to be polar.
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6. Calculate the new pressure in atm if 2.45 L of a gas at a pressure of 1.20 atm is contracted to a new
volume of 2.20 L
Answer:
\(\boxed {\boxed {\sf x \approx 1.34 \ atm}}\)
Explanation:
Since we are dealing with temperature and pressure, we must use Boyle's Law. This states that the pressure is inversely proportional to the volume. The formula is:
\(P_1V_1=P_2V_2\)
Where P is the pressure and V is the volume.
We know the original pressure (P₁) of the gas is 1.20 atmospheres and the volume (V₁) is 2.45 liters.
\(1.20 \ atm * 2.45 \ L = P_2V_2\)
We also know the gas is contracted to a new volume of 2.20 liters (V₂) , but we do not know the pressure (P₂). We can use x.
\(1.20 \ atm *2.45 \ L = x * 2.20 \ L\)
We can solve the left side of the equation and multiply.
\(2.94 \ atm *L= x*2.20 \ L\)
We are trying to find the new pressure (x), so we must isolate the variable. It is being multiplied by 2.20 liters. The inverse of multiplication is division, so we divide both sides by 2.20 L.
\(\frac {2.94 \ atm *L}{2.20 \ L}=\frac{x*2.20 \ L}{2.20 \ L}\)
\(\frac {2.94 \ atm *L}{2.20 \ L}=x\)
The units of liters cancel.
\(\frac {2.94 \ atm}{2.20 \ }=x\)
\(1.33636363636 \ atm =x\)
The original measurements have 3 significant figures, so our answer should have the same. For the number we found, that is the hundredth place.
The 6 in the thousandth place tells us to leave the 3 in the hundredth place.
\(1.34 \ atm \approx x\)
The new pressure is approximately 1.34 atmospheres.
What is the electrophile in the Friedel-Crafts alkylation reaction with tert-butylchloride? A. The tert-butyl cation B. A complex of tert-butylchloride and aluminum trichloride C. A proton D. Aluminum trichloride
The electrophile in the Friedel-Crafts alkylation reaction with tert-butylchloride is B) A complex of tert-butylchloride and aluminum trichloride.
Friedel-Crafts alkylation reactionIn the Friedel-Crafts alkylation reaction, an alkyl halide is reacted with an aromatic compound in the presence of a Lewis acid catalyst, such as aluminum trichloride. The Lewis acid catalyst coordinates with the alkyl halide to form a complex, which acts as the electrophile in the reaction.
The electrophile then attacks the aromatic compound, leading to the formation of a new carbon-carbon bond and the substitution of a hydrogen atom on the aromatic compound with an alkyl group.
Therefore, the correct answer is B. A complex of tert-butylchloride and aluminum trichloride. This complex is the electrophile that reacts with the aromatic compound in the Friedel-Crafts alkylation reaction.
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what happens to the speed of a sound wave from an underwater animal as the sound passes into the air above?
A. It stays the same
B. It falls to zero
C. It decreases
D. It increases
Help what is the answer?
The specific heat of mercury calculated from her data is 0.13 J/g°C.
Specific heat is a measure of how much energy is required to heat a substance. This is the amount of energy (in joules) required to heat 1 gram of a substance by 1°C. Different substances have different specific heats.
To answer this question, use the heat slaughter formula:
Q =mCΔT
In the question:
Heat energy: Q = 30.1 J
Mass of mercury: m = 12.5 g
T1 = 21.2
T2 = 39.6°C
Temperature:
ΔT = T2 –T1
∆T = 39.6 – 21.2
∆T = 18.4°C
The specific heat of mercury is?
Q =mCΔT
C = Q/mΔT
C = 30.1/12.5 x 18.4
C =30.1/230
C = 0.13 J/g°C
So, the specific heat of mercury is 0.13 J/g°C.
Question:
In the laboratory a student finds that it takes 30.1 Joules to increase the temperature of 12.5 grams of liquid mercury from 21.2 to 39.6 degrees Celsius.
The specific heat of mercury calculated from her data is_____J/g°C.
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In making her morning tea, Dorothy drops a sugar cube into some hot water. She stirs the mixture but no longer sees the sugar cube at the bottom of her mug. Based on her observation of sugar dissolving in hot water, she can properly conclude that the sugar is
Answer:
Hydrophilic
Explanation:
A hydrophilic substance is any substance that interacts efficiently with water.
Since water is a polar solvent, a hydrophilic substance must also be polar in order to interact with water since like dissolves like in chemistry.
The fact that sugar disappears in hot water indicates that sugar is a polar hydrophilic substance because only a polar solute can dissolve in water
Based on her observation of sugar dissolving in hot water, she can properly
conclude that the sugar is hydrophilic.
A substance is said to be hydrophilic when it is able to react and dissolve in
water due to the attractive force between them. Hydrophobic substances
don't dissolve in water.
In this scenario, we were told the sugar dissolved completely in water which
means that the sugar is hydrophilic.
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Calculate the density of a 20.015 g object that occupies 5.44 cm3 .
Answer:
\(density = \frac{mass}{volume} \\ \\ density = \frac{20.015}{5.44} \\ \\ { \boxed{ \boxed{density = 3.679 \: g {cm}^{ - 3} }}}\)
a sample of blood is found to contain 64.5 micrograms of valproic acid. how many milligrams of valproic acid does this blood sample contain?
The valproic acid contains 0.0645 milligrams
Conversion scale1000 microgram = 1 milligram
Data obatined from the questionFrom the question given, the following data were obtained:
Mass (in micrograms) = 64.5 microgramsMass (in milligrams) =?How to convert 64.5 micrograms to milligramsWe can convert 64.5 micrograms to milligrams as illustrated below:
1000 microgram = 1 milligram
Therefore,
64.5 micrograms = (64.5 micrograms × 1 milligram) / 1000 microgram
64.5 micrograms = 0.0645 milligrams
Thus, the valproic acid contains 0.0645 milligrams
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16. Which of the following have the same electron configuration as each other?
1. Na+1 and Ar
2. Na+1 and Ne
3. Na and Ne
4. Na and Na+1
Answer:3
Explanation:
Answer:3
Explanation:
disadvantage of globalization:
plz leave some ideas
Answer:
causes job displacement
Consider the following reaction:
NO+O3?NO2+O2,rate= k[NO][O3]
Part A
What is the overall reaction order?
Part B
What are the units of the rate constant k for this reaction?
M?s?1
s?1
M?2?s?1
M?1?s?1
M?3?s?1
Part C
What would happen to the rate if [NO] were doubled?
a. stay the same.
b. double.
c. triple.
d. quadruple.
Part D
What would happen to the rate if [O3] were doubled?
a. The rate would
b. stay the same.
c. quadruple.
d. triple.
e. double.
A second order response is what is being described. As a result, second order reaction is the appropriate response for overall reaction order. It is measured in mol -1 L s-1.
First order and second order reactions: what are they?The concentration of one of the reactants affects the rate of a first-order reaction. The square of a reactant's concentration or the product of the concentrations of two reactants determines the second-order reaction rate.
What are 0th and 2nd order reactions?The reaction exhibits zero-order kinetics if the reactant concentration rises. If there is no effect, it has first-order kinetics. If the half life is shortened by increasing the reactant, the reaction has second-order kinetics.
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Which of the following is the most likely reason that the reaction occurs at a significant rate only if the temperature of the reaction mixture is greater than 200°C?
A. The reaction has a high activation energy
B. ΔS for the reaction is negative. C. The reaction has a high activation energy
D. ΔG <0 when T < 200°C.
The most likely reason that the reaction occurs at a significant rate only if the temperature of the reaction mixture is greater than 200°C is because the reaction has a high activation energy. Option A is correct.
What is activation energy?Activation energy is the minimum amount of energy required to initiate a chemical reaction. It is the energy barrier that must be overcome to transform reactants into products during a reaction. It is expressed in Joules, Joules per mole or kilojoules per mole. Only particles with energy equal to or greater than the activation energy can initiate a reaction. Consequently, the higher the activation energy, the slower the reaction rate. For this reason, increasing the temperature of the reactants increases the kinetic energy of the particles in the mixture, resulting in a higher reaction rate.
The reaction has a high activation energy.The reaction occurs when the temperature of the reaction mixture is greater than 200°C because the reaction has a high activation energy. Activation energy is the minimum amount of energy required to initiate a chemical reaction. It is the energy barrier that must be overcome to transform reactants into products during a reaction.
Therefore, the correct answer is A.
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Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number Match B) 32.06 (atomic mass) c) 14 (atomic number)
I need help with the same thing
Not sure if you need the answer anymore but...
Sp is A (antominy)
S is B (32.06 u)
Si is C (14)
Hope I helped anyone who needed this answer!
The electrolyte that is used to make Hypochlorous Acid is made from Sodium Chloride (NaCl). the bottle says that the electrolyte solution contains 25% sodium chloride. If 2.4 ounces of the solution is added to the half gallon to prepare for the reaction. How many total grams of sodium chloride are used in the reaction. If the reaction produces 1100 PPM of HOCl (hypocholorus acid) how many grams of Hypocholrous are made? Do you think all the NaCl was converted to HOCl? or we can brew one more time and get more HOCl. If all of the NaCl converts to HOCl what would be the maximum possible PPM of the disinfectant
Answer:
63.9 grams. Yes, the Nacl was converted. Maximum possible ppm is 540ppm.
Explanation:
I this is college level chemistry not regular high school chem.
Answer:2
Explanation:
it is it do not ask questions
When a nucleus of ^235 U undergoes fission, it breaks into two smaller, more tightly bound fragments.1) Calculate the binding energy per nucleon for ^235U? (Express with appropriate units)2) Calculate the binding energy per nucleon for the fission product ^137 Cs? (Express in appropriate units)
1) The binding energy per nucleon is 7.59 MeV/nucleon and 2) The binding energy per nucleon is 8.39 MeV/nucleon.
1) The binding energy per nucleon is as follows:
m_proton + m_neutron + m_electron - m_U
= 92*1.007276466812 + 92*5.4857990943e-4 + 143*1.008664916 - (235.0439299)
= 1.9151 u
= 931.494061 * 1.9151 MeV
= 1784 MeV
= 1784/235 = 7.59 MeV/nucleon
2) The binding energy per nucleon is as follows:
m_proton + m_neutron + m_electron - m_Cs
= 55*1.007276466812 + 55*5.4857990943e-4 + 82*1.008664916 - (136.9070895)
= 1.2338 u
= 931.494061 * 1.2338 MeV
= 1149 MeV
=1145/137 = 8.39 MeV/nucleon
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A 0.050L solution of Ba(OH)2 is neutralized by 0.072L of a 0.55 M HNO3 solution. What is the concentration of the Ba(OH)2 solution?
Answer:
0.396M
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
2HNO3 + Ba(OH)2 —> Ba(NO3)2 + 2H2O
From the balanced equation above,
The mole ratio of the acid (nA) = 2
The mole ratio of the base (nB) = 1
Step 2:
Data obtained from the question. This include the following:
Volume of base (Vb) = 0.05L
Concentration of base (Cb) =..?
Volume of acid (Va) = 0.072L
Concentration of acid = 0.55 M
Step 3:
Determination of the concentration of the base, Ba(OH)2.
The concentration of the base, Ba(OH)2 can be obtained as follow:
Cava /CbVb = nA/nB
0.55 x 0.072 / Cb x 0.05 = 2/1
Cross multiply to express in linear form
Cb x 0.05 x 2 = 0.55 x 0.072
Divide both side by 0.05 x 2
Cb = (0.55 x 0.072) / (0.05 x 2)
Cb = 0.396M
Therefore, the concentration of the base, Ba(OH)2 is 0.396M