In the given question,It will take Caroline 1.2 hours to travel 45 miles if she is traveling 37 mph (miles per hour).
As we know the velocity formula:
v = d/t
Where
V is velocity, d is distance and t is time.
as given in the question
distance = 45 miles
velocity = 37 mph
To find time t,
put the values in the formula:
t = d/v
t = 45/37
t = 1.2 hours
It will take Caroline 1.2 hours to travel 45 miles if she is traveling 37 mph (miles per hour).
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A flask contains a mixture of N2 and O2 at STP. If the partial pressure of N2 is 40 kPa, what's the mole fraction o
A flask contains a mixture of N₂ and O₂ at STP. If the partial pressure of N₂ is 40 kPa, the partial pressure of O₂ is 61.325 kPa.
STP is the abbreviation which is used for a Standard Temperature and Pressure. The standard temperature is 273 K as well as the standard pressure is 1 atm pressure.
1 atm = 101.325 kPa
According to Dalton's law, state's that the sum of the individual pressures exerted by the gases in a mixture is the total pressure.
[tex]P_{total}[/tex]= [tex]P_{A}[/tex] + [tex]P_{B}[/tex]
Therefore, [tex]P_{total}[/tex]= [tex]p_{n2}[/tex] + [tex]P_{O2}[/tex]
[tex]P_{N2}[/tex] = 40kPa
[tex]P_{total}[/tex] = 101.325kPa
101.325kPa = 40kpa + [tex]P_{O2}[/tex]
[tex]P_{O2}[/tex] = 61.325kpa
--The given question is incorrect, the correct question is
--"A flask contains a mixture of N₂ and O₂ at STP. If the partial pressure exerted by the N₂ is 40.0 kPa, the partial pressure of O₂ is?"--
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If there are 6 atoms of hydrogen on the products side, how many molecules of H2 are on the reactants side?
If there are 6 atoms of hydrogen on the products side, then there would be 6 atoms of hydrogen also on the reactants side. That would be 3 molecules of [tex]H_2[/tex].
Law of conservation of atomsAccording to the law of conservation of atoms or matter, atoms can neither be destroyed nor created during the course of chemical reactions. However, atoms can change forms during reactions.
Going by this law, it means the number of atoms of a particular element must remain constant before and after chemical reactions. Otherwise, we will say the chemical equation of such reactions are not balanced.
Thus, if there are 6 atoms of hydrogen on the products side of a reaction, 6 atoms of hydrogen must also be on the reactants side of the reaction. A molecule of hydrogen, [tex]H_2[/tex], has 2 atoms of hydrogen. This means 3 molecules of hydrogen must be on the reactants side in order to have a total of 6 hydrogen atoms.
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How do you stop a chemical burn from burning?
Remove dry chemicals.Remove contaminated clothing or jewelry. Bandage the burn. Rinse again if needed.
the amount of harm to the skin relies upon on how strong the chemical was, how lots of it become at the skin, and how long it become there. Chemical burns, even minor ones, can be very painful. A minor burn may heal inside a few days. however a extra extreme burn might also take weeks or maybe months to heal completely.you need to now not use ice, or even ice-bloodless water, on a burn. extreme cold carried out to a burn can further damage the tissue. to properly cool and clean a burn, remove any apparel that covers it.
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Where is hydroelectric energy used?
Hydroelectric energy is a renewable form of energy used to generate electricity.
This energy is created by harnessing the power of moving water, typically from rivers and streams, to spin turbines and generate electricity.
Hydroelectric power plants are used to generate electricity for homes, businesses, and cities all over the world.
By utilizing the natural power of water, hydroelectric energy is a clean, safe, and reliable source of energy that helps reduce global carbon emissions. It is also a cost-effective energy source, making it a popular choice for many energy providers.
Hydroelectric energy is one of the most widely used sources of electricity in the world, with many countries heavily relying on it for their energy needs.
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Electronegativity Please Fill Out
The propensity of an atom of a certain chemical element to draw shared electrons when forming a chemical bond is known as electronegativity and is denoted by the symbol X.
What are Electronegativity?The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. An atom or a substituent group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterizes a bond along the continuous scale from covalent to ionic bonding, can be quantitatively estimated using electronegativity. The inverse of electronegativity is electropositivity, which describes an element's propensity to accept valence electrons.
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A. If you have a Periodic Table that is NOT color-coded describe where to look on the periodic table to to find elements which have similar chemical properties.
B. Explain why they have similar chemical properties.
C. Name three elements that have those similarities.
(I need a written paragraph please)
Answer:
Explanation:
A. Periodic table is beautifully arranged to place elements with similar chemical properties together. A family or a group is a vertical column in periodic table that has elements with similar property.
B. They all have similar properties because they all have the same number of valence electrons that determine the chemical properties such as reactivity of the element.
C. Lithium, sodium, potassium all fall in group 1 called alkali metals and these elements all share the property of being some of the most reactive elements.
What can be found in the box on a periodic table?
In the box on a periodic table we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.
By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.
The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.
Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.
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how many grams of KNO3 that should be placed in the airbag to fully react with the Na.
10 Na + 2KNO: > 1K20 + 5Naz0 + 1 N2 (g)
NaN3→ Na + 32N2 1 mole of sodium azide gives 32 moles of N2
How much nitrogen is in an airbag?
37 gallons
The amount of nitrogen gas produced by a handful (130 grammes) of sodium azide is 67 litres, which is sufficient to inflate a typical air bag. An air bag can be inflated in as little as 0.03 SECOND. There is another chemistry at play.
Even though we don't typically link chemistry with cars, a lot of chemistry happens in a functioning car, such as the chemical processes that take place in the battery to produce electricity and the burning of gasoline to power the engine. Another reaction includes the air bag, which is one that most drivers would much rather not experience firsthand.
Instead of using compressed gas, air bags are inflated using the byproducts of a chemical reaction. Sodium azide, often known as NaN3, is the principal chemical involved in the air bag reaction
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the diameter of a sodium atom, na, is larger than the diameter of a sodium ion, na , because the sodium ion has
Na+ has one fewer electron than Na, making it smaller and possessing a higher effective nuclear charge.
The fact that sodium ions have just two electron shells makes them smaller than sodium atoms for the main reason (the atom has three). Because they both have the same number of nucleons, the Na+ ion and Na atom have the same nuclear charge. Na+, on the other hand, has a smaller nuclear charge than Na because it has one fewer electron. Na+ is therefore smaller than Na because there is more attraction on the electrons that are already there. A sodium ion's size is smaller than that of a sodium atom.
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In old western cowboys often would put their ear to a train track to listen for a oncoming train what benefit would this method provide over listening for a train by listening for sound throug air
Answer:the vibrations of the train moving on the tracks goes farther on the tracks than the sound of the train
Explanation:i think
What are the 6 Types of preservatione
Drying and fermenting are two of the earliest techniques for food preservation. Replacement, recrystallization, permineralization, and unaltered
The term "preservation" refers to all of the procedures used to extend the useful life of archival records. The goal of preservation efforts is to stop information from being lost and to reduce physical and chemical deterioration of documents. You can manage the components in your food and consume healthy food all year round by canning, drying, and freezing.
The obvious goals of conservation are the protection of wildlife and the advancement of biodiversity. The animals we adore won't vanish into oblivion by being protected and preserved for future generations. And we can keep the ecosystem in good shape and working properly.
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The correct question is as follows
What are 6 types of preservations ?
Which of the following answer choices would BEST describe Marco Polo's reaction when he saw the Chinese using coal
The majority of Europeans at the time had never heard of coal, which Marco Polo described as "black stones...which burn like logs."
Initially, charcoal was utilized in the production process, which caused extensive deforestation in northern China. However, coal had fully replaced charcoal by the end of the 11th century.
They do indeed have an abundance of firewood. However, due to the massive population and the large number of bathhouses and baths that are continually being heated, it would be impossible to supply enough firewood, as everyone takes a bath at least three times each week, and in the winter, if they can, every day. Since every man of rank and means has a bathroom of his own at home, the abundance and low cost of these stones result in significant wood savings.
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You move a 12-newton box 6 meters across the floor. How much work have you done?
The amount of work that has been done would be 72 Joules.
What is work done?The work done by a body can be defined as the amount of energy transferred from one body to another body. In other words, work is the product of force and the distance moved by the force.
This can be expressed mathematically as:
Work = force x distance moved by the force.
In this case:
Force = 12 newton
Distance = 6 meters
Work done = 12 x 6
= 72 NM or 72 Joules
In other words, if I move a 12 Newton box by 6 meters across the floor, the amount of work done would be 72 Joules.
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What volume of a 0.120 M CaI2 solution would contain 0.078 mol of the solute? A. 35.0 mL O B. 65.0 mL O C. 350 mL O D. 650 mL
650 mL,In order to obtain the volume of solution necessary to provide a given amount of solute in moles, one needs to take the number of moles and divide by the solution concentration in molarity.
Molar concentration, also known as molarity, quantity concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume. The number of moles per liter, denoted by the unit sign mol/L or mol/dm in SI units, is the most often used unit denoting molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.
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How i an electron orbital different from an orbit what do the hape of the orbital hown in Figure 14
An orbit is a set route along which electrons spin around the nucleus of an atom, whereas an orbital is a region where the chance of finding any electron is calculated.
What is electron?The electron is a subatomic particle with an initial electric charge of -1. Electrons are the first generation of the lepton particle family and are often regarded as elementary particles due to the lack of known components or substructure. An electron is a negatively charged subatomic particle that can be attached to or released from an atom (not bound). A bound electron is one of the three major kinds of particles within an atom, the other two being protons and neutrons. The nucleus of an atom is made up of electrons, protons, and neutrons.
Here,
An orbit is a fixed path along which electrons spin around an atom's nucleus, whereas an orbital is an area where the probability of finding any electron is determined.
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Which of the following geometries for the complex ion [Fe(en)Cl4]? are possible?
O linear
O trigonal bipyramidal or square pyramidal
O octahedral
O trigonal planar
O tetrahedral or square planar
The following geometry for the complex ion [Fe(en)Cl4] is : octahedral.
What is meant by molecular geometries?The arrangement of atoms in a molecule in three dimensions is known as molecular geometry, commonly referred to as the molecular structure. A compound's polarity, reactivity, phase of matter, color, magnetism, and biological activity can be determined by knowing its molecular structure.
Tetrahedral molecular geometry is present here (e.g. CH4). Trigonal pyramidal molecular geometry results from having three bond pairs and one lone pair of electrons (e.g. NH3). The geometry of the molecule is angular or curved if there are two bond pairs and two lone pairs of electrons (e.g. H2O).
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Draw two isomers of this, and name each one: C4H6
Two isomers are Butadiene Bicyclobutane.
What is isomers?Isomers are substances that contain precisely the same number of atoms, i.e., they have the exact same empirical formula, but they differ from one another by the arrangement of the atoms. Ethylbenzene, m-xylene, p-xylene, and o-xylene are a few isomers with the formula C8H10.The term "isomer" refers to molecules or polyatomic ions that have different configurations of atoms in space but the same number of atoms in their molecular formulas, or the number of atoms in each element. Isomerism is the presence or potential for isomers. Isomers may or may not have comparable chemical or physical properties.Isomerism results from the ability of atoms in a molecular formula to be organized in different ways, resulting in compounds with diverse physical and chemical properties. They number two.To learn more about isomers refers to:
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Thiamine hydrochloride (vitamin B1 hydrochloride, HC12- H17ON4SCl2) is a weak acid with Ka 5 3. 4 3 1027. Sup- pose 3. 0 3 1025 g of thiamine hydrochloride is dissolved in 1. 00 L of water. Calculate the pH of the resulting solution. (Hint: This is a sufficiently dilute solution that the autoion- ization of water cannot be neglected. )
According to the given statement The pH of the resulting solution is 13.03.
How to calculate pH?To calculate the pH of the resulting solution, we need to know the concentration of the thiamine hydrochloride ions in the solution.
The Ka value of thiamine hydrochloride is 5.3 x 10^-27. Since thiamine hydrochloride is a weak acid, it dissociates in water according to the following equation:
HC12-H17ON4SCl2 (s) <-> H+ (aq) + C12-H17ON4SCl2- (aq)
The product of the acid and the base concentrations is equal to the acid dissociation constant (Ka)
H+(aq) * C12-H17ON4SCl2- (aq) = Ka
Molarity (M) = moles of solute/liters of solution
3.0 x 10^-25 g of thiamine hydrochloride is dissolved in 1.00 L of water. The molar mass of thiamine hydrochloride is 337.29 g/mol. So we can calculate the number of moles of thiamine hydrochloride in the solution.
moles = mass / molar mass
moles = 3.0 x 10^-25 / 337.29 = 8.94 x 10^-28
Molarity = moles / liters = 8.94 x 10^-28 / 1 = 8.94 x 10^-28 M
Now we can substitute the concentration of thiamine hydrochloride into the equation for the acid dissociation constant.
Ka = [H+] * [C12-H17ON4SCl2-]
Ka = (x)(x) = 8.94 x 10^-28
We know the Ka value and we know the concentration of thiamine hydrochloride ions. So we can use the Ka value and the thiamine hydrochloride concentration to calculate the concentration of H+ ions in the solution.
x^2 = 8.94 x 10^-28
x = √(8.94 x 10^-28)
x = 9.4 x 10^-14
[H+] = x = 9.4 x 10^-14 M
The pH of the solution is calculated by taking the negative log of the H+ concentration:
pH = -log(9.4 x 10^-14)
pH = 13.03
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What volume of 0.75 M H₂SO4 is required to neutralize 25.0
mL of 0.427 M KOH?
A volume of 0.02845 L is required to neutralize this acid-base reaction.
To neutralize an acid with a base, you need to react with equal molar amounts of the two. The balanced chemical equation for the neutralization of sulfuric acid (H₂SO₄) with potassium hydroxide (KOH) is as follows:
H₂SO₄ + 2 KOH → K₂SO₄ + 2 H₂O
The molarity of a solution is a measure of the number of moles of solute per liter of solvent. To find out how many moles of H₂SO₄ you need to neutralize 25.0 mL of 0.427 M KOH, you first need to convert the volume of KOH to liters, using the conversion factor 1 L/1000 mL.
25.0 mL KOH × (1 L/1000 mL) = 0.025 L KOH
Then, use the molarity of the KOH solution to find out how many moles of KOH you have:
0.427 M KOH × 0.025 L KOH = 0.010675 moles KOH
Since the balanced chemical equation shows that 1 mole of H₂SO₄ reacts with 2 moles of KOH, you need twice the number of moles of KOH, or 0.010675 moles × 2 = 0.02135 moles H₂SO₄.
Finally, use the molarity of the H₂SO₄ solution to find out how much volume you need:
(0.02135 moles H₂SO₄) ÷ (0.75 M H₂SO₄) = 0.02845 L H₂SO₄
So you need a volume of 0.02845 L of 0.75 M H₂SO₄ to neutralize 25.0 mL of 0.427 M KOH. This is equivalent to 28.45 mL of 0.75 M H₂SO₄.
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How can distance be measured?
Distance can be measured by centimeters (cm) and kilometers (km).
Distance is defined as the total movement of an object without any regard to the direction. Distance is the length of the route between the two points.
SI unit of distance is the meter (m). Short distances may be measured in the centimeters (cm), and the long distances may be measured in kilometers (km). For example: Measure the distance from the bottom to the top of a sheet of paper in centimeters and the distance from your house to your school. Maps are also used to measure the the distance.
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The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175 years later
Ninety-seven years is the half-life of 90Sr. A sample of 90Sr would still have 0.015 of its original atoms after 175 years. The duration needed for a quantity to fall to half its starting value is known as the half-life.
The phrase is frequently employed in nuclear physics to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. One or more electrons are attached to the nucleus of every atom, which is made up of a nucleus. Protons and neutrons, in various numbers, make up the nucleus. Neutrons exist only in the most prevalent type of hydrogen. Atoms that are neutral or ionised are the building blocks of all solids, liquids, gases, and plasma.
[A]t=[A]o/[A]t=4.18 [A]o/[A]t=e4.18=65.5
[A]o = 1.5%[A]o], where [A]t = 0.015
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A team of scientists claim that they have discovered a new experimental
method for determining atomic mass. Which of the following is necessary for
the claim to be considered valid?
A. The atomic mass of an element according to the new method
must be greater than its previous measurement.
B. The method must work for all isotopes.
C. The atomic mass of an element according to the new method
must be less than its previous measurement.
OD. Another team of scientists must be able to replicate the results of
the experiment.
SUBMIT
For a team of scientists to claim that they have discovered a new experimental method for determining atomic mass, their claim is to be considered valid only if another team of scientists is able to replicate the results of the experiment.
In order for a scientific claim to be considered valid, it is important that the results of the experiment can be replicated by other researchers.
Replication means that other scientists should be able to obtain the same results using the same methods. This helps to ensure that the results are accurate and reliable, rather than being a fluke or an error.
Without the ability to replicate the results, it is difficult to have confidence in the validity of the claim, as it may be due to uncontrolled variables or other factors that cannot be reproduced. Ensuring that results are replicable is an important part of the scientific process and helps to build a strong foundation of knowledge.
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Ethanol (C2H5OH) melts a - 144 oC and boils at 78 °C. The enthalpy of fusion of ethanol is 5. 02 kj/mol, and its enthalpy of vaporization is 38. 56 kj/mol. The specific heats of solid and liquid ethanol are 0. 97j/g - k and 2. 3 j/g - K, respectively.
(a) How much heat is required to convert 42. 0 g of ethanol at 35 °C to the vapor phase at 78 °C?
(b) How much heat is required to convert the same amount of ethanol at - 155 oC to the vapor phase at 78 °C?
According to the given statement a) 39.367kJ heat is required AND b) 62.3kJ heat is required.
What are a molar mass and a mole?One mole of a chemical is equal to 6.022 x 1023 particles (or formula units) (ionic compound). The molar mass of a reagent is the amount of 1 mole of that chemical. In put it another way, it gives you the amount of grams per molecule of a material.
Heat required to convert 42.0 g of ethanol at 35 °C to the vapor phase at 78 °C can be calculated by;
H = mcθ + mL
m = mass of ethanol
c = specific heat capacity of ethanol
θ = temperature change
L = Latent heat of vaporization of ethanol
Adding values;
H = (42 × 2.3 × (78 - 35)) + (42/46 × 38.56 × 10^3)
H = 4154 + 35207
H = 39.367 kJ
b) Heat required to convert the same amount of ethanol at - 155°C to the vapor phase at 78 °C;
H = mLfus + mcθ + mLvap
H = (42/46 × 5.02 × 10^3) + (42 × 2.3 × 78 - (- 155)) + (42/46 × 38.56 × 10^3)
H = 4583 + 22508 + 35207
H = 62.3 kJ
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Which of the following substances would you expect to have a nonzero dipole moment? Check all that apply.
O Chloroethane, CH3 CH2C1 O XeF4 O Cl20
BF3
O Chloroethane, CH3CH2Cl, O XeF4 of the following substances would expect to have a nonzero dipole moment
A substance with a non-zero dipole moment means that the electrons are not distributed symmetrically in the molecule, resulting in a partial positive charge on one end and a partial negative charge on the other end. Chloroethane, CH3CH2Cl has a polar covalent bond between C-Cl and since the C-Cl bond is polar the overall molecule is polar and thus has a nonzero dipole moment.O Chloroethane, CH3 CH2C1 O XeF4 O Cl20. BF3XeF4 has a tetrahedral electron pair geometry, with 4 polar covalent bond Xe-F, and since all the F atoms are in the same plane as the Xe atom, the molecule is polar and thus has a nonzero dipole moment. Cl20 has a polar covalent bond Cl-Cl but since the molecule is symmetric the overall dipole moment is zero. BF3 has a trigonal planar electron pair geometry, with 3 polar covalent bond B-F, but since the molecule is symmetric the overall dipole moment is zero.
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The half-life of titanium-44 is 60.0 y. A sample of titanium contains 0.600 g of titanium-44. How much remains after 100.0 y
The amount of titanium-44 remaining will be 1/4 of the original amount, or 0.150 g.
What is amount?Amount is a quantity or magnitude of something, typically money. For example, a person may refer to the "amount of money" they have saved, the "amount of time" it takes to do something, or the "amount of food" they have purchased. Amount can also refer to the total number of something, such as the "amount of people" who have attended an event or the "amount of work" that needs to be done.
The half-life of titanium-44 is 60.0 y, meaning that after every 60.0 y, the amount of titanium-44 will be halved.
0.600 g - 0.150 g = 0.450 g
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Write a skeleton equation using the step, that shows sulfur burns in oxygen gas to
form sulfur dioxide.
Answer:
Skeleton equation: H2S(g) + O2(g) → SO2(g) + H2O(l)
Explanation:
Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years
The fraction of cobalt-60 atoms remaining after 26.5 years is approximately 0.25 (1/4).
What is atom?An atom is the smallest unit of matter that still retains its properties. It consists of a nucleus, which is made up of protons and neutrons, surrounded by electrons that orbit the nucleus. Atoms are the building blocks of all matter and can combine to form molecules. Atoms are also constantly in motion and can be found in everything from air to rocks. They are essential for life, as they make up all the molecules that form the cells and organs in the human body.
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0.25 mol of potassium nitrate is added to enough water to make a 175 mL solution.
What is the molar concentration of potassium nitrate?
A solute is a species that dissolves within a liquid solvent to form a solution—a single, uniform mixture. The total volume of the solution can be expressed in liters.
The total amount of solute contained within can be expressed as a number of moles. The solute concentration in molarity is calculated by combining these two values. The molarity is expressed in "mol/L" according to the required calculation, though it is frequently written in "M" units.
What does molarity stand for?The amount of a substance in a certain volume of solution is known as its molarity (M). Molarity is the ratio of a solute's moles to liters of solution. The molar concentration of a solution is another name for molarity.
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how does the hybridization of the sulfur atom change in the series SF2, SF4, SF6?
O sp, sp^3, sp^3 d^2 O sp^3, sp^3 d^2, sp^3 d^2 O sp^3, sp^3, sp^3 d^2 O sp, sp^3 d, sp^3 d^2 O sp^3, sp^3 d, sp^3 d^2
the hybridization of the sulfur atom change in the series SF2, SF4, SF6-Option 1 - sp, sp^3, sp^3 d^2 O sp^3, sp^3 d^2
The hybridization of the sulfur atom changes in the series SF2, SF4, SF6 as follows:
In SF2, the sulfur atom is in the sp hybridized state, meaning it has one s and one p orbital in its valence shell. This allows the sulfur to form a double bond with one fluorine atom.In SF4, the sulfur atom is sp3 hybridized, which means it has one s and three p orbitals in its valence shell. This allows the sulfur to form four single bonds with four fluorine atoms.In SF6, the sulfur atom is sp3d2 hybridized, which means it has one s, three p, and two d orbitals in its valence shell. This allows the sulfur to form six single bonds with six fluorine atoms.It is worth noting that the hybridization of the sulfur atom in SF6 is not very common and it is more likely the octahedral electron pair geometry of SF6 is achieved by the d orbitals of sulfur being empty and the sulfur atom being sp3 hybridized. In summary, the hybridization of sulfur in SF2 is sp, in SF4 is sp3, and in SF6 is sp3d2.
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Sodium reacts with chlorine to form the compound sodium chloride, or salt. If the total mass of the reactants is 58.44 amu, what will be the total mass of the products?
Answer: 58.44amu
Explanation:
The Law of the Conservation of mass states that mass isn't created nor destroyed, but simply transformed.
Applying it in a chemistry context means that there will be the same amount of mass of product as you will start out with, as the mass is transformed from the reactants' mass to the products'.
Therefore, it is 58.44amu.