If 9.82 g of pb(no3)4 are dissolved to make a 3.5 m solution, what is the volume (in ml.) of that solution?
Answers
The volume of the 3.5 m solution containing 9.82 g of Pb(NO3)4 is about 4.103 mL.
To calculate the volume of the solution, we need to use the formula for molality:
Molality (m) = moles of solute / kg of solvent
First, we need to find the moles of Pb(NO3)4 in 9.82 g. The molar mass of Pb(NO3)4 is approximately 683.56 g/mol.
Moles of Pb(NO3)4 = 9.82 g / 683.56 g/mol ≈ 0.01436 mol
Now, we can use the given molality (3.5 m) to find the mass of the solvent:
0.01436 mol = 3.5 m * kg of solvent
kg of solvent = 0.01436 mol / 3.5 m ≈ 0.004103 kg
Since the solvent is water, we can assume that 1 kg of water is equal to 1 L. Therefore, the volume of the solution is:
0.004103 kg * 1000 mL/kg ≈ 4.103 mL
So, the volume of the 3.5 m solution containing 9.82 g of Pb(NO3)4 is approximately 4.103 mL.
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Related Questions
The image above shows a wave
Answers
Answer:
I need an image to help you as best as I can. Hopefully, this gets your attention so I can try to help!
Explanation:
what kind of intermolecular forces act between a nitrogen trichloride molecule and a dichloroethylene ch2ccl2 molecule?
Answers
The intermolecular forces that act between a nitrogen trichloride (NCl3) molecule and a dichloroethylene (CH2Cl2) molecule are dipole-dipole interactions and dispersion forces.
Intermolecular forces refer to the attractive and repulsive forces that occur between molecules in a substance. These forces arise due to the interactions between the charges on the atoms or molecules that make up the substance. Intermolecular forces are responsible for the physical properties of matter such as melting and boiling points, surface tension, and viscosity.
The types of intermolecular forces include London dispersion forces, dipole-dipole forces, and hydrogen bonding. London dispersion forces are present in all molecules and arise due to temporary fluctuations in the electron density of the molecule. Dipole-dipole forces occur in polar molecules where the positively charged end of one molecule interacts with the negatively charged end of another. Hydrogen bonding is a type of dipole-dipole force that occurs between a hydrogen atom bonded to an electronegative atom such as nitrogen, oxygen, or fluorine and a lone pair of electrons on another electronegative atom.
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Which energy sublevel occurs out of place because of its lower energy? A. 1p B. 4s C. 2s D. 3d
Answers
Answer:
When arranged in order of increasing energy, the 2s energy sublevel is out of place.
Note: 1p energy sublevel does not exist in the first shell, as there is only the 1s orbital, and this shell can have a maximum of only 2 electrons.
Explanation:
The arrangement of electrons in orbits or shells around the nucleus of an atom is known as the electronic configuration of the atom. Some principles and rules guide electron-filling in atoms; one of which is the Aufbau principle.
According to Aufbau principle, electrons are fed into shells of lower energy levels before filling up of higher energy shells.
The energy levels of of electron orbitals arranged in the order of increasing energy level is given below:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, ..., 7p
Therefore, during electron filling, the 2s orbital is filled first before the 4s orbital because it is at a lower energy level.
Answer:
The answer is B. 4s
Explanation:
Educere
molar mass of Mg(OH)2 in g/mol
Answers
Answer:
2× Ar(O) + Ar(H) ×2 =58,3197 g/mol
CH3CH2OH can interact with other like molecules through ________
A. Only dispersion forces
B. Only dispersion forces and dipole-dipole
C. Dispersion forces, dipole-dipole, and hydrogen bonds
Answers
CH3CH2OH can interact with other like molecules through, the correct option is (C). Dispersion forces, dipole-dipole, and hydrogen bonds
Dispersion forces, also known as London forces, are the weakest type of intermolecular force and are present in all molecules. They are caused by the temporary fluctuations of electron density in a molecule, which creates a temporary dipole. These temporary dipoles can interact with other temporary dipoles in nearby molecules, resulting in dispersion forces. Dipole-dipole interactions are a type of intermolecular force that occur between polar molecules. A polar molecule has a permanent dipole, or separation of charge, due to the unequal distribution of electrons. Dipole-dipole interactions occur when the positive end of one polar molecule interacts with the negative end of another polar molecule. CH3CH2OH is a polar molecule because of the presence of an oxygen atom which has a higher electronegativity than carbon and hydrogen atoms, so it can interact with other polar molecules through dipole-dipole interactions.
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(T/F) reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms
Answers
The statement 'reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms' is true.
Phagocytic cells are the kind of cells that consume or destroy microorganisms by producing substances that are harmful to them, according to the study of biology.
The phagocytic cells produce oxygen and nitrogen intermediates, and these intermediates are reactive enough to bind to the chemicals in the microbe and inhibit their function. The microorganism dies when its activities are impeded to the point where it is unable to carry out the fundamental functions of life. Thus, the above statement is accurate.
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Aldosterone is the main hormone for ___
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Aldosterone is the main hormone for regulating electrolyte balance in the body, specifically sodium and potassium. It is produced by the adrenal glands and acts on the kidneys to increase the reabsorption of sodium and the excretion of potassium.
This helps to maintain proper fluid balance and blood pressure. Aldosterone secretion is regulated by various factors such as the renin-angiotensin-aldosterone system, potassium levels in the blood, and stress hormones. Dysfunction in aldosterone production can lead to various health problems, such as hypertension, electrolyte imbalances, and adrenal gland disorders.
Aldosterone is the main hormone for regulating electrolyte balance and blood pressure in the body.
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PLEASE ANSWER ASAP
A classmate argues that the changes in energy that occur in a pendulum are unrelated to the energy changes that a burning log undergoes. She points out that the burning of a log is an irreversible chemical change in matter, while the energy changes in a moving pendulum are constantly reversing, and are examples of physical changes. Evaluate your classmate’s argument.
Answers
Answer:
The argument about the chemical and physical changes in the energy is correct.
This is so because when a log is burnt, the chemical change occurs as wood releases energy in the form of carbon dioxide are formed which is irreversible while the changes in energy of movement of the pendulum is a physical change as its potential energy converts to kinetic and kinetic energy again converts to the potential which is a reversible process.
Hence, the argument saying the changes in energy occurring on a pendulum and log is right.
this question 4 please please help me
Answers
Answer: I don’t have a lot of time for your
Yea
Explanation:
Explain A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work?
Answers
Explanation:
When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).
Therefore, there will be more number of collisions taking place between the solute and solvent molecules.
As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.
Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.
The reaction of hydrogen bromide(g) with chlorine(g) to form hydrogen chloride(g) and bromine(g) proceeds as follows:
2HBr(g) + Cl2(g) -->2HCl(g) + Br2(g)
When 23.5 g HBr(g) reacts with sufficient Cl2(g), 11.8 kJ is evolved.
Calculate the value of △,H for the chemical equation given.
Answers
The enthalpy of reaction per mole of HBr for this
reaction = ArH =-40.62 kJ/mole.
Explanation:
2HBr(g) + C12(g) > 2HC|(g) + Br2 (g)
When 23.9 g HBr(g) reacts with sufficient C12(g),
12.0 kJ of heat is evolved, calculate the value of
Ar for the chemical reaction.
Note that ArH is the enthalpy per mole for the
reaction.
Molar mass of HBr (g) = 80.91 g/mol.
Hence, 1 mole of HBr = 80.91 g
23.9 g of HBr led to the reaction giving off 12.0
kJ of heat
80.91 g of HBr will lead to the evolution of (80.91
× 12/23.9) = 40.62 kJ heat is given off.
Hence, 40.62 kJ of heat is given off per 80.91 g
of HBr.
This directly translates to that 40.62 kJ of heat is
given off per 1 mole of HBr
Hence, the heat given off per mole of HBr for
this reaction is 40.62 kJ/mole.
But since the reaction liberates heat, it means
the reaction is exothermic and the enthalpy
change for the reaction (AHrxn) is negative.
-40.62
What element is in period 4 and has 5 neutrons in its most common isotope?
Answers
The neutrons are sub atomic particles. The particles which are smaller in size than an atom is known as sub atomic particles. The isotope of beryllium with mass number 9, i.e., ⁹Be has 5 neutrons.
What is isotope?The isotopes are defined as the chemical elements which have the same atomic numbers but different mass numbers. In isotopes, the number of neutrons differ from the number of protons. The physical properties of the elements are different.
'Be' has 3 isotopes, they are ⁷Be, ⁹Be and ¹⁰Be. Among these isotopes, ⁹Be is found to have 5 neutrons and 4 protons or electrons.
Thus ⁹Be is the most common isotope with 5 neutrons.
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a shampoo formulation contains a blend of sds and cocoamidopropyl betaine (capb) in which the mole fraction of sds is 0.8. cmc of sds is 8 mm and cmc of capb is 0.08 mm. estimate the cmc of the mix assuming ideal solutions (activity coefficient is 1). calculate to the first decimal place.
Answers
The estimated cmc of the SDS-CAPB mix assuming ideal solutions is 6.5 mm (rounded to one decimal place).
To estimate the cmc of the SDS-CAPB mix, we can use the mole fraction weighted average of the cmc values of the individual surfactants:
cmc_mix = (X_SDS * cmc_SDS) + (X_CAPB * cmc_CAPB)
where X_SDS and X_CAPB are the mole fractions of SDS and CAPB, respectively.
Given that the mole fraction of SDS is 0.8, the mole fraction of CAPB is:
X_CAPB = 1 - X_SDS = 1 - 0.8 = 0.2
Using the values provided, we can calculate the cmc of the mix as:
cmc_mix = (0.8 * 8) + (0.2 * 0.08) = 6.48 mm
Therefore, the estimated cmc of the SDS-CAPB mix assuming ideal solutions is 6.5 mm (rounded to one decimal place).
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during recycling, ground glass is melted under light heat and poured into molds. which type of change occurs as the glass melts?
Answers
Hope this helps!
The state change occurs when the glass melts.
What are different states of matter?The matter is anything that has mass and occupies space.
The different states of matter are solid, liquid, gas, and plasma.
The properties of the different types of matter can be understood by looking at the arrangement of molecules.
When a solid substance is heated beyond its melting point, it changes its state from solid to liquid.
When liquid is heated beyond its vaporizing point, it changes its state from liquid to gas.
Solids are closely packed and have a definite shape and size.
Liquids are loosely packed and take up the space of the container.
Gas has high intermolecular spacing and the gases are not rigid.
Ground glass is melted under light heat and poured into molds.
Recycling glass involves changing the state of glass from solid to liquid state.
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c3h6 has a double bond in its carbon skeleton? a. true b. false
Answers
\(C_3H_6\) has a double bond in its carbon skeleton. This is a true statement.
Carbon skeleton refers to the chain of carbon atoms that make up an organic molecule. The presence or absence of double bonds in the carbon skeleton affects the properties of the molecule and how it interacts with other molecules. In \(C_3H_6\), there are three carbon atoms arranged in a linear chain, with each carbon atom forming single covalent bonds with two hydrogen atoms. The remaining valence electrons on each carbon atom form a double bond between the first and second carbon atoms.
This double bond is responsible for the unsaturated nature of the molecule. \(C_3H_6\)is an example of a simple alkene, also known as propene. Its carbon skeleton and double bond make it a versatile molecule that can be used in various applications, including the production of plastics, rubber, and other materials.
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Each element has its own set of characteristic absorption lines because Each element has its own set of characteristic absorption lines because the temperature of each element can varies. electron energy levels differ for each element. elements can exist in different forms of matter. absorption lines depend upon the speed of the object. each element has a different mass.
Answers
Answer:
Question is unclear
Explanation:
Answer:
what ru asking dear??? write question properly ??? Write the correct question from next time.
Using 1.0x10-6 M as the quantitative precipitation criterion, if silver ions are added to a solution containing initially 0.050 M I and 0.080 M SCN ions, which of the following statement is correct related to the (i)which ion precipitates first, and the molarities of Agt required (ii)to decrease the concentration of the first precipitated ion to 1.0x10M and (iii)to initiate the precipitation of the second ion? (for Agl Kop=8.3x10-", for AgSCN Kop=1.1x102)
Answers
(i) Silver iodide (AgI) precipitates first.
(ii) The molarity of Ag+ needs to be reduced below the solubility product constant of AgI.
(iii) The molarity of Ag+ needs to exceed the solubility product constant of AgSCN.
(i) According to the given solubility product constants, AgI has a smaller Ksp value compared to AgSCN. Therefore, AgI precipitates first when silver ions are added to the solution containing I- and SCN- ions.
(ii) To decrease the concentration of the first precipitated ion, AgI, to 1.0x10-10 M, the molarity of Ag+ needs to be reduced below the Ksp value of AgI. The specific molarity of Ag+ required can be calculated by using the Ksp value of AgI and the stoichiometry of the reaction.
(iii) To initiate the precipitation of the second ion, AgSCN, the molarity of Ag+ needs to exceed the Ksp value of AgSCN. Once the concentration of Ag+ exceeds the Ksp value of AgSCN, AgSCN will start to precipitate.
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Nuclear fission occurs when _______________ a. TNT and plutonium are combined, causing the molecules to separate. b. a nucleus breaks up into two equal fragments that release and separate more atoms. c. like atoms collide to create double nuclei. d. trinitite is created by multiple molecules that form a single atom.
Answers
Nuclear fission occurs when a nucleus breaks up into two equal fragments that release and separate more atoms. So, the correct option is B.
Nuclear fission is a process in which the nucleus of an atom breaks apart into two or more smaller nuclei. This process releases a significant amount of energy.
Option B accurately describes the process of nuclear fission. When a heavy nucleus, such as uranium-235 or plutonium-239, absorbs a neutron, it becomes unstable and splits into two smaller nuclei.These smaller nuclei, along with additional neutrons, are released in the process. The release of neutrons can trigger a chain reaction, where each neutron released can potentially collide with other nuclei, causing them to undergo fission as well.The energy released during nuclear fission is due to the conversion of a small amount of mass into a large amount of energy, as described by Einstein's famous equation, E=mc².This energy is utilized in various applications, including nuclear power generation and nuclear weapons. Nuclear fission reactions are carefully controlled in nuclear power plants to ensure the sustained release of energy without leading to uncontrolled chain reactions. Hence the correct option is B.
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Which number in the hydrologic cycle diagram represents precipitation?
1
2
3
4
Illustration of water cycle showing land and water body with arrows pointing outward and inward to both land and water body and some numeric labels one, two, three, and four mentioned along with arrows
I will give brainilest to however can answer!
Answers
Answer:
Its 3
Explanation:
I took the test
Answer: 3
Explanation: im in k12 got the same question
Which change does an increase in heat energy cause?
A. slower molecule movement
B. reduced energy transfer
C. more collisions between molecules
D. greater energy differences between molecules
Answers
Answer:
d is the answer
Explanation:
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if two different gases are at the same temperature (which means the gases have the same kinetic energy), how would you determine which gas would have the faster speeds
Answers
You cannot determine which gas would have faster speeds based solely on the same temperature.
What is temperature?Temperature is the measure of the average kinetic energy of the molecules in a given system. Temperature is measured in units of energy such as Celsius, Fahrenheit, and Kelvin, and is expressed as a numerical value. Temperature can be used to measure the physical properties of a material such as its boiling point and melting point. Temperature is also used to measure the degree of heat or coldness of a body or environment.
The speed of the gas particles depends on the mass of the individual particles, the type of motion they are performing (translational, rotational, or vibrational), and the force that is acting on them.
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What is the name of MnO? Explain how you determined the bond type and the steps you used to determine the naming convention for the compound.
Answers
Answer:
Magnesiumoxide
Explanation:
I don't know
Is Cl2 chlorine, dichlorine or dichloride?
Answers
Answer:
Cl² is dichlorine
Explanation:
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The tails of animals can serve many important functions. They are mainly used in balance and locomotion. Many lizards have a fragile, detachable tail that will come off when they are attacked by predators, allowing them to escape.
Why is the presence of a brightly colored, detachable tail an advantage for some lizards?
Answers
Answer:
The presence of a brightly colored, detachable tail can be advantageous for some lizards because it serves as a distraction or decoy for predators. When a predator attacks, the lizard can quickly detach its tail, which wriggles and continues to move for a short period of time. This sudden movement can divert the predator's attention away from the lizard's body, allowing the lizard to escape.
The bright coloration of the tail can also help to draw the predator's attention towards it, instead of the lizard's body. Bright colors are often used in the animal kingdom as warning signals, indicating that an animal is toxic or dangerous. While the lizard may not necessarily be toxic or dangerous, the bright colors of its tail can create a similar effect, deterring predators from attacking in the first place.
Additionally, the detachable tail can serve as a form of self-defense, allowing the lizard to escape from a predator's grasp. By detaching its tail, the lizard can leave the predator with a distraction while it makes its escape. Over time, the lizard can regrow its tail, allowing it to continue to use this defense mechanism in the future.
Why do isotopes undergo radioactive decay?
Answers
Isotopes undergo radioactive decay because thermodynamics generally governs the situation. Every atom strives to have the greatest degree of stability. When the number of protons and neutrons in the atomic nucleus is out of balance, instability results in radioactive decay. In essence, the nucleus contains too much energy to keep all the nucleons together.
Radioactive decay a the spontaneous process through which an unstable atomic nucleus breaks into smaller, more stable fragments.
Three Types of Radioactive Decay:
Alpha Decay:
When an alpha particle basically a helium nucleus with two protons and two neutrons is ejected, the parent's atomic number and mass number are reduced by two and four, respectively.
Beta Decay:
A stream of electrons from the parent, known as beta particles, is released during beta decay, and a neutron in the nucleus is changed into a proton. The new nucleus has the same mass number, but an additional atomic number of one.
Gamma Decay:
The atomic nucleus releases extra energy during gamma decay in the form of high-energy photons (electromagnetic radiation). The resultant nucleus takes on a more stable energy state while maintaining the same atomic number and mass number.
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An intermetallic compound is found in the magnesium–gallium system that has a composition of 41. 1 wt% mg–58. 9 wt% ga. Specify the formula for this compound.
Answers
The formula of the compound will be \(Mg_2Ga\)
Empirical formula of compoundsThe compound contains magnesium and gallium. The symbol and magnesium and gallium is Mg and Ga respectively.
Magnesium content is 41.1%
Gallium content is 58.9%
First, find the number of moles of each element in the compound by dividing their percentage compositions with their respective molar weights.
Mg = 41.1/24.505 =1.6772
Ga = 58.9/69.723 = 0.8448
Next, divide each number of moles by the smallest number of moles.
Mg = 1.6772/0.8448 = 2
Ga = 0.8448/0.8448 = 1
Thus, the formula of the compound is \(Mg_2Ga\)
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A sample of n sludge specimens is selected and the ph of each one is determined. the one-sample t test will then be used to see if there is compelling evidence for concluding that true average ph is less than 7.0. what conclusion is appropriate in each of the following situations?
Answers
For the sample of n sludge specimens is selected and the conclusion and the pH of each one is determined.
A) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.
B) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.
C) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.
D) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.
E) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.
The null hypothesis in inferential statistics is that two possibilities are always equal. It shows that the underlying assumption is that the observed difference is just the result of chance. It is possible to estimate the probability of the null hypothesis is correct using statistical tests.
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What is the purpose of the NADH made during glycolysis?
A. It makes sugars more likely to explode.
B. It carries electrons and hydrogens to the electron transport chain.
C. It transports pyruvate around the cell
D. All of these.
E. It breaks down ATP.
Answers
NADH carries electrons and hydrogens to the electron transport chain.
The main role of NADH and FADH₂ is to donate electrons and hydrogen to the electron transport chain. NADH stands for Nicotinamide Adenine Dinucleotide (NAD) + Hydrogen (H). It also plays an important role of generating energy in the body. During the electron transport chain both NADH and FADH₂ donate electrons by providing hydrogen molecules to the oxygen molecules to create water. Both Kreb's cycle and glycolysis produces NADH.
The NADH that are produced by the body are used for generating energy for the body. Supplements are also taken for NADH but they have some side effects like blood pressure and other effects.
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If a sample of a gas occupies 5.22 L at 235 oC, what will its volume be at 75 oC if the pressure remains the same?
Answers
Answer:
1618.2
Explanation:
235+75=310×75=1618.2
How many moles of NaCl are contained in 100.0 mL of a 0.20 M solution?
Answers
Answer:
0.02 mol.
Explanation: