The force exerted per unit of area by a column of mercury is 1.01×10⁵ Pa and height of column that will exert same force is 10.3 m.
We will be using the formula mentioned below for both the calculations.
P = rho×g×h, where P is pressure, rho is density, g is acceleration due to gravity and h is height.
Firstly converting the units to m and kg.
Height = 76 cm
100 cm = 1 m
So, height = 0.76 m
Density = 13.59×(10²)³/10³
Density = 13590 kg/m³
Keep the value in formula for calculation pressure, which is force per unit area
Pressure = 13590×9.81×0.76
Performing multiplication
Pressure = 1.01×10⁵ Pa
Now finding height of column in case same force and liqui being water
Calculating density = 1×(10²)³/10³
Density = 1×10³ kg/m³
h = P/rho×g
h = 1.01×10⁵/(9.81×10³)
Performing division
height = 10.3 m
Hence, pressure is 1.01×10⁵ Pa and height is 10.3 m.
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3. spontaneous reactions: once you give them a little they will on their own. they tend to energy and give it their surroundings. a. total energy ( ), which is enthalpy. in biology our energy is in b . in a spontaneous reaction it gets smaller or b. entropy ( ) is a measure of the d /randomness of a system. in spontaneous reaction, entropy . c. temperature (t), if we i the temperature the spontaneous reaction is more likely to happen.
A spontaneous reaction is a reaction which occurs on its own, without providing any external energy. Spontaneous reactions are irreversible in nature.
A spontaneous reaction has an increase in entropy, ΔS(degree of randomness) and a decrease in enthalpy,ΔH in it.
An exothermic reaction, where there is decrease in enthalpy i.e ΔH is negative and an increase in entropy i.e ΔS is positive will always be spontaneous in nature.
The combination of enthalpy change and entropy change gives the free energy of a reaction , which is known as Gibb's free energy( ΔG°)
ΔG° = ΔH - TΔS
Here, temperature is a deciding factor when both ΔH and ΔS have opposite signs. With increase in temperature, the spontaneity of a reaction increases.
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give one ir absorption frequency or range you could use to distinguish between the following two isomers, and designate which isomer will exhibit this absorption by a preceding letter, e.g. a1700 or b1640-1680.
1) analyze their absorption frequencies and identify respective functional groups 2)Because every chemical has a fingerprint part, measurements of 1500 cm and under are irrelevant in this case.
What is an example of frequency?The quantity of wave that pass a set location in a predetermined period of time is known as frequency.Therefore, if a wave passes through in half a second, the frequency becomes 2 per second.The frequency being 100 times per hour if it take 1/100 of an hour.
What is the purpose of frequency?radio signals, & light, is a critical factor in science and technology.
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Although BH3 and CH2O have similar shapes, one is polar and the other is non-polar. Explain why.
BH3 has trigonal planer geometry with zero net dipole moment, hence it is non-polar.
Each B-H bond in BH3 is polar / forms a dipole because the B and H atoms have different electronegativities.
On the other hand, CH2O is having a similar structure but possesses dipole moment because of the presence of polar C=O group, thus the entire molecule is polar.
That is why despite the fact that both BH3 and CH2O have similar structure, but one is polar whereas other is non-polar.
The hydrogen side of the molecule will end up slightly positive. So that is why these two. That is why the first one is non polar because of the symmetry. And the second one is polar because it is a symmetrical it does not have that symmetry that we see in the first molecule.
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The number of electron energy levels in a magnesium atom is________ a.1 b.2 c.3 d.4 e.5
The number of electron energy levels in a magnesium atom is: 3
What is electron energy level?The set distances from an atom's nucleus where electrons may be found are referred to as energy levels (also known as electron shells). Higher energy electrons have greater energy as you move out from the nucleus. A region of space inside an energy level known as an orbital is where an electron is most likely to be located.
An electron rotating in a shell is connected with a particular amount of energy. When it moves from one energy level to another, or when it leaps to another shell, the energy changes. As a result, a shell also indicates an electron's energy along with its position, and these are known as energy levels.
The distribution of electrons in the electron shells for the magnesium atom is given as : 2,8,2.
So, the total number of energy levels are 3.
Correct option: (c)
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3-methyl-1-pentene + hbr
2-bromo-2-methylbutane As a result, 2-bromo-2-methylbutane is the main product.
What are some uses for methylbutane?As a temporary cooling medium in the lab, methylbutane is employed. For example, a tissue sample could be submerged in liquid nitrogen and then methylbutane. Since liquid nitrogen (-196°C) evaporates when it comes into touch with a warm object, this method of cooling is more effective than direct contact with the sample.
Why does it go by the name 2-methylbutane?For instance, in systematic nomenclature, the isopentane molecule is referred to as a butane because the longest chain that could be traced through it has four carbon atoms. Isopentane is referred to as 2-methylbutane because the second carbon in the chain produces a methyl group (CH3-).
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How many atoms are in 15.6 grams of silicon? 0.555 3.34 x 1023 2.64* 1026 438
The atoms that are in 15.6 gms of silicon are 3.66×10^23 present in the atoms.
Silicon (Si) has an atomic quantity of 14 and used in lots of present day devices. Its packages are huge and varied, from glass home windows to feeding bottles, incorporated circuits to enamels.
The quantity of atoms in 15.6 grams of silicon. To begin the molar mass of silicon needs to be regarded that's 28.1 gmol.Using this information, convert the mass of the silicon into moles as proven below:15.6 g (128.1gmol)=15.628.1 mol=0.5551601423≈0.555 mol.Using the reality that one mole is identical to 6.602×1023 atoms, convert the moles of silicon into the quantity of atoms as proven:0.555 mol(6.602×10^23 atoms1 mol)=(0.555)(6.602×10^23) atoms=3.66411≈3.66×10^23 atoms.There are 3.66×10^23 atoms in 15.6 grams of silicon.Read more about silicon;
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If you had not heated the sample long enough to remove all the water of hydration, how would your subsequent calculations have been affected?
If the sample is not heated long enough water of hydration remain in the sample which adds on to the molar mass of the sample thereby introducing errors in calculations.
What is molar mass?Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.
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The fluoride ion is the conjugate base of the weak acid hydrofluoric acid_ The value of Kb for F is 1.39x10-11 Write the equation for the reaction that goes with this equilibrium constant: It is not necessary tO include states such as (aq'
A weak acid hydrofluoric acid's conjugate base is the fluoride ion. Kb for F has a value of 1.39x10-11.
What effects does hydrofluoric acid have on a person's body?Even at low concentrations, hydrogen fluoride gas can irritate the respiratory system, nose, and eyes. High concentrations of hydrogen fluoride inhaled, together with skin contact, can result in irregular heartbeats and fluid accumulation in the lungs, which can lead to death.
Can a person be dissolved in hydrofluoric acid?Since it is caustic, hydrofluoric acid easily disintegrates bone and tissue. Human skin is easily penetrated by HF, allowing it to decalcify bone and destroy the soft tissues underlying (hypocalcemea). Because hydrofluoric acid (HF) may dissolve glass and is a moderately corrosive to metals, it cannot be stored in glass containers.
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a mixture of nitrogen and oxygen gases contains nitrogen at a partial pressure of 439 mm hg and oxygen at a partial pressure of 511 mm hg. what is the mole fraction of each gas in the mixture?
The mole fraction of nitrogen is 0.46 and mole fraction of oxygen is 0.53.
Solution:
Total partial pressure = partial pressure of oxygen + partial pressure of nitrogen
Total partial pressure = 439 + 511
Total partial pressure = 950
Hence the Total partial pressure is 950.
Partial pressure of gas1 = mole fraction of gas1 × Total partial pressure
mole fraction of gas1 = Partial pressure of gas1 /Total partial pressure
Partial pressure of oxygen = mole fraction of oxygen × Total partial pressure
mole fraction of oxygen = Partial pressure of oxygen /Total partial pressure
mole fraction of oxygen = 511 / 950
mole fraction of oxygen = 0.53
Partial pressure of nitrogen = mole fraction of nitrogen × Total partial pressure
mole fraction of nitrogen = Partial pressure of nitrogen /Total partial pressure
mole fraction of nitrogen = 439/ 950
mole fraction of nitrogen = 0.46
Hence, the mole fraction of nitrogen is 0.46 and mole fraction of oxygen is 0.53.
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What is the likeliest m/z value for the base peak in the mass spectrum of 3-methylpentane?
The base peak in the mass spectrum of 3-methylpentane has the most plausible value at m/z=57. Hydrocarbons often undergo mass spectroscopic fragmentation at a branch.
What does the mass spectrometry Mz value mean?The horizontal axis in a mass spectrum is stated in units of mass divided by charge number, or m/z. With GCMS, z is usually always 1, hence the mass is frequently determined by the m/z value.
What is the M Z of the base peak?The base peak of the spectrum is defined as the peak with the arbitrary intensity value of 100. The molecular ion, which has a peak at m/z=72, is what determines the molecule's molecular mass.
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For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Nil_2 (aq) NaF(aq) CuBr(aq) Nal(aq) NiF_2(aq)
The aqueous salts that will during electrolysis produce hydrogen gas and oxygen gas are NaF and NaI.
The correct options are B and D.
What is electrolysis?Electrolysis is the process of decomposition of a substance known as an electrolyte when a direct electric current is passed through it.
An electrolyte is a substance that conducts electricity in the molten or aqueous state and which is decomposed during the process.
The element discharged during an electrolytic process depends on:
the position of the element in the electrochemical seriesthe concentration of the ion of the elementthe nature of the electrodeAn aqueous salt of sodium will always produce hydrogen gas and oxygen gas at the electrodes.
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37) In liquid propanol, CH3CH2CH2OH, which intermolecular forces are present? A) Only dipole-dipole and ion-dipole forces are present. B) Only dispersion and dipole-dipole forces are present. C) Only hydrogen bonding forces are present D) Dispersion, hydrogen bonding and dipole-dipole forces are present. 38) _ 38) The first-order decomposition of N2O5 at 328 K has a rate constant of 1.70 . 10-3 -1. If the initial concentration of N2O5 is 2.88 M, what is the concentration of N2O5 after 12.5 minutes? A) 0.174 M B ) 0.805 M C) 0.355 M D) 0.124 M E ) 2.82 M
In liquid propanol, CH3CH2CH2OH, which intermolecular forces are present, option (d) is correct i.e. Dispersion, hydrogen bonding and dipole-dipole forces are present.
The electromagnetic forces of attraction or repulsion that act between atoms and other types of nearby particles, such as atoms or ions, are examples of intermolecular forces (IMFs), also known as secondary forces. In comparison to intramolecular forces, which hold a molecule together, intermolecular forces are weak. For instance, the forces between adjacent molecules are substantially weaker than the covalent bond, which involves sharing electron pairs between atoms. Both types of forces are crucial components of the force fields that molecular mechanics typically use. A hydrogen bond, which refers to the attraction between a hydrogen atom that is bound to an element with high electronegativity, typically nitrogen, oxygen, or fluorine, is an extreme instance of dipole-dipole bonding. A common way to explain the hydrogen bond is as a powerful electric dipole-dipole interaction. The fact that it is directional, stronger than a van der Waals force interaction, produces interatomic distances shorter than the sum of their van der Waals radii, and typically only involves a small number of interaction partners can be interpreted as a form of valence.
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CAN SOMEBODY PLEASE HELP? (30 POINTS!)
The percent abundance of the Rb- 85 isotope is 79 % while the percentage abundance of Rb-87 is 21%.
What is the percentage abundance?We know that an atom has to be composed of isotopes. The isotopes of the elements are the atoms that do not have the same mass number but they do have the same atomic number. The reason why they do not have the same mass number is because they do not have the same number of neutrons present in the atom of the element.
Having said that, we now have to turn our attention to the atom of rubidium which is the atom that is under consideration here in this question. We have to write the relative abundance of Rb- 85 as x and that of Rb-87 as 1-x.
We now have;
85.427 = 85x + 87(1 - x)
85.427 = 85x + 87 - 87x
85.427 - 87 = 85x - 87x
-1.573 = -2x
x = 0.79 or 79%
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Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3).
Which equation correctly represents this reaction?
Responses
N2 + 3H2 → 2NH3
upper case N subscript 2 end subscript plus 3 upper case H subscript 2 end subscript rightward arrow 2 upper case N H subscript 3 end subscript,
N + H → NH
upper case N plus upper case H rightward arrow upper case N H,
2NH → N + 3H2
2 upper case N H rightward arrow upper case N plus 3 upper case H subscript 2 end subscript,
2N2 + H2 → 3NH3
2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript,
The equation is 2N2 + H2 → 3NH3 ,2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript.
What is balanced equation ?A chemical equation that is balanced conserves mass and has an equal number of atoms of each element on both sides of the equation.
A chemical equation that is balanced has equal masses for the reactants and products, contains the same amount of atoms of each element on both sides of the equation.
Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Different elements' atom counts in the reactants and products of unbalanced chemical equations are different.
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Which of the following is an example of quantization? A. The temperature range in a classroom B. The number of students in a classroom C. The amount of time spent in a classroom D. Learning happening in a classroom
Answer:
A. The temperature range in a classroom
Explanation:
Quantization works on continuous data, meaning that the data can't be just integers like the number of students in a classroom or the time spend in a classroom.
Answer: B. The number of students in a classroom
Explanation: Quantization refers to the process of representing a continuous variable with discrete values. In this case, the number of students in a classroom can be quantized because it can only take on certain discrete values, such as whole numbers as there cannot be a fraction of a student.
QUESTION 39 CH3CO2H is called acetic acid The name implies that It does not react with either acids o1 bases b It can donate an H+ ion to baze and forms CH3CO2 It can react with acids but does not react with bases d.It can accept an Ht ion from base_ and forma CH3COzH2 It can donate an electron to base_ and formz CH3CO2H+
Acetic acid is an acid because it can donate [tex]H^+[/tex] and form [tex]CH_{3} CO_{2} ^-[/tex][tex]CH_{3} CO_{2} ^-[/tex]
What is an acid?While there are many definitions of an acid, we are going to dwell with the definition tat was given by Brownstead and Lowry because that is the definition of an acid that we would find to be relevant to the discussion that we have in this question as it is here.
In his definition of the acid, the acid is said to be any substance that is able to release the hydrogen ion. Thus we have to look at the acid as a hydrogen ion donor and this is the general view of the acid that we are going to adopt.
From the forgoing, it is now quite clear that we would be looking at acetic acid as an acid because of the fact that it is able to donate a proton and form the acetate ion.
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12 Which of the following molecules is an example of Cs point group? (2 Points) CHCl3 CH4 CHFCIBr CHzClBr CCl4
CHzClBr has Cs point group
CCl4, CH4 have Td point group (Tetrahedral Point Group)
CHCl3 has C3r point group and the structure
CHFClBr has C1 point group of symmetry.
What is Cs point group?The Cs Point Group, those properties belonging to irreducible representation A' are symmetric to both the identity operation E as well as reflection through the mirror plane.
In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos⁻¹ ≈ 109.5° when all four substituents are the same, as in methane as well as its heavier analogs.
Here,
CHzClBr has Cs point group
CCl4, CH4 have Td point group (Tetrahedral Point Group)
CHCl3 has C3r point group and the structure
CHFClBr has C1 point group of symmetry
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Bromine can exist as a solid, liquid, or gas. The
diagrams show the arrangements of particles in
each of these states.
1) The particles at 20 degrees is shown by C
2) The particles at -10 degrees is shown by A
What are the states of matter?We know that matter can be able to be found in three states and these states of matter are the solid, the liquid and the gaseous states of matter. In this case we have the bromine atom which is found to be in the solid state at a very low temperature when the movement of the particles have become quite restricted.
Having said this, we would now look at the image. It is clear that bromine has a melting point of -7 degrees Celsius and a boiling point of -59 degrees Celsius .
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Methyl isocyanate, shown as resonance structure 1, can also be represented by other resonance structures. Draw the next most important resonance contributor. Then add curved arrows to each structure to show delocalization of electron pairs to form the other structure. HC N=C=0 Resonance Structure 2 Resonance structure 1 Include lone pairs of electrons, formal charges, and hydrogen atoms. You can add condensed hydrogens using the More menu, selecting +H and clicking on the carbon as many times as needed. Draw curved arrows on resonance structure 1. Draw resonance structure 2 and curved arrows. Select Draw Rings More Erase Select Draw Rings More HC - "
Resonance structures are the Lewis structures that describe the delocalization of electrons in a molecule.
Resonance Structure 1 of methyl isocyanate:
This Include lone pairs of electrons, formal charges, and hydrogen atoms.
The formal charge on both Carbon atom is = 4 valance - 4 bonds = 0
Formal charge (O) = 6 V.E - 2 bonds - 4 non bonding electrons = 0
Formal charge on (N) = 5 V.E - 3 bonds - 2 non bonding electrons = 0
F.C. on H = 1 V.E. - 1 bond = 0
Overall charge on the molecule = 0 charge
Structure 2:
Formal Charge on Both (C)= (4valence e- - 4 bonds)= 0
Formal charge (O)= (6 V.E-1Bonds-6 nonbonding electrons)= -1 Charge
Formal Charge on (N)= (5 V.E-4Bonds-0 nonbonding electrons) = +1 Charge
F.C on H= (1 V.E-1Bond)=0
Overall Charge on the molecule= +1 -1 =0 charge
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here structure is not given. i solved this from a similar question. find if it is helpful.
Which of the following relationships correctly express the Clausius-Clapeyron equation, which relates vapor pressure to temperature? Select all that apply.
Ln P=-delta Hvap/R(1/T)+C
LnP/P2=deltaHvap/R(/T2-/T1)
LnP2/p1=deltaHvap/R(/T2-/T1)
Ln P=-delta Hvap/R(1/T)+C and LnP2/p1=deltaHvap/R(/T2-/T1). A Clausius-Clapeyron equation, which connects vapor pressure to temperature, is accurately expressed by relationships.
The Clausius-Clapeyron equation is just what.additionally known as the Clapeyron solution or Clapeyron-Clausius equations. the differential equation linking a substance's temperature and pressure in a system where the substance is in equilibrium between two phases. where T is the temperatures in °C and K is the vapor pressure.
What does Clausius Clapeyron's Unit mean?The left (LHS) natural log term has no units. The only criterion is that P1 and P2 must be expressed in same pressure unit, regardless of the pressure units you employ. The unit for the temperatures term will be K1. The R is measured in J mol K1, where K1 is the temperature.
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1. Draw the Lewis structure for SeOBr2 in the window below and then answer the questions that follow. Do not include overall ion charges or formal charges in your drawing. Do not draw double bonds to oxygen atoms unless they are needed for the central atom to obey the octet rule. a. What is the electron-pair geometry for Se in SeOBr2 ? b. What is the the shape (molecular geometry) of SeOBr2? 2. Draw the Lewis structure for SeF6 in the window below and then answer the questions that follow. Do not include overall ion charges or formal charges in your drawing. a. What is the electron-pair geometry for Se in SeF6 ? b. What is the the shape (molecular geometry) of SeF6?
SeOBr2 has tetrahedral electron pair geometry and pyramidal structure and SeF6 has octahedral electron pair geometry and octahedral structure as there is no lone pair of electron.
Lewis structure is also known as electron dot structure. This involves simplified diagrams used to represent the bonding of atoms in a molecule. In this type of representation, nonbonded electrons are shown as dots around the atoms while bonded electrons are shown as lines between the atoms. from infrared and polarized Raman spectroscopy suggests that selenium oxobromide adopts a pyramidal molecular geometry with Cs symmetry.
In the Lewis structure of SeOBr2, it has 3 sigma bonds, one lone pair of electron and has the steric number 4.it has sp3 hybridization. it shows tetrahedral electron pair geometry. it shows a pyramidal structure.
In the Lewis structure of SeF6, it has 6 sigma bonds, no lone pair of electron and has the steric number 6. it has sp3d2 hybridization. it shows octahedral electron pair geometry. it shows a octahedral structure.
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if the total pressure in the astronaut's suit drops to 0.5 atm, and it contains 78% nitrogen and 21% oxygen, then what is the partial pressure of nitrogen and oxygen in the suit?
The atmosphere of Mars contains 95.32% of Carbon dioxide, 2.6% molecular Nitrogen, and 1.9% Argon, and the rest is water vapor, Carbon monoxide oxygen, and other noble gases.
Its atmospheric pressure is less than 1% that of Earth.
Atmospheric pressure on Mars is 610 Pascale which is equal to 0.00602023 atm
In mmHg, this pressure is equal to 4.57538 mm of Hg.
Dry air is composed of approximately 21% oxygen, 78% nitrogen, and 1% other gases. According to Dalton's Law, at any depth, the partial pressure of oxygen is 21% of the total pressure exerted by air, and the partial pressure of nitrogen is 78% of the total pressure.
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Chemistry give the number of significant figures: 6.32 g
There are 3 important numbers.All digits in significant figures that are not zeros.
How can you locate important numbers in chemistry? There are three important numbers.All digits in significant figures that are not zeros.as well as all zeros that, if deleted, would NOT alter the number.I realize that the words are backwards, but they are important for indicating where the measurement finishes. Basic Guidelines for Calculating the Number of Significant Figures All digits that are not zero have meaning.With two exceptions, zeros are also significant: those that come before the decimal point.In numbers greater than one, terminal zeros before the decimal point present an uncertain situation.(1) All significant numerals are non-zero:There are 2 major figures in 1.2 g and 4 significant figures in 1.234 g.(2) Significant zeros occur between non-zero digits:3.07 mL has three significant digits and 1002 kg has four.5 - The number 48.050 has 5 major digits.
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What is the relationship between a 90% confidence interval around a mean and a 95% confidence interval around a mean?
The 90% C.I. is wider and includes more values than the 95% C.I.
The 95% C.I. is more precise in estimating a mean than the 90% C.I.
The 90% C.I. is more precise in estimating a mean than the 95% C.I.
The 95% C.I. is narrower and includes less values than the 90% C.I.
The 90% confidence interval (C.I.) is more precise in estimating a mean than the 95% C.I.
Confidence interval is defined as the range of values where a parameter might fall at a given confidence level. It can be calculated using the formula below.
CI = μ ± z x (SD / √n)
where CI = confidence interval
μ = sample mean
z = found by using a z-score table
SD = sample standard deviation
n = sample size
The larger the degree of confidence is, the wider is the interval. Hence, the 95% C.I. is wider and includes more values than the 90% C.I.
On the other hand, the smaller the degree of confidence is, the more the estimate of a mean is precise. Hence, the 90% C.I. is more precise in estimating a mean than the 95% C.I.
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what volume of bromine trifluoride is required to produce 106 liters of fluorine gas according to the following reaction? (all gases are at the same temperature and pressure.)
70.6 litres of bromine trifluoride is required to produce 106 liters of fluorine gas according to the following reaction provided that all gases are at the same temperature and pressure.
Since, 2BrF3 (g) gives Br2 (g) + 3 F2 (g)
Here 2 mole BrF3 produces 3 mole F2
If volume produced of F2 is 106 litres
Therefore, volume of BrF3 =?
Since, v1 is directly proportional to n1
Therefore, v1/n1 = v2/n2
v1/2moles = 106 litres/3 moles
v1= 212/3 = 70.6 litres
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draw all the enol tautomers (including e and z isomers) for each of the ketones.
Since the proton is bonded to the carbon atom that is bonded to the highest number of other carbon atoms, the enol tautomer is an "e" isomer:
e-Acetone: H3C-C=O-CH3
|
H-O
To draw the "z" isomer, simply bond the proton to the carbon atom that is bonded to the lowest number of other carbon atoms:
z-Acetone: H3C-C=O-CH3
H
|
O-H
Enyol tautomers are structures of a compound that can interconvert through the movement of a proton. The two most common types of enol tautomers are the "e" and "z" isomers.
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suppose a solid with a cubic unit cell contains atoms a, x, and z. the a atom is in the body center position, the x atoms are at each corner, and the z atoms are on each face. based on this structure the empirical formula of the compound would be a
The empirical formula of the compound would be axz₃.
A solid with a cubic unit cell contains a, x, and z as :
at body center position, a = 1 × per atom = 1 × 1 = a
at the corner position, x = 1 / 8 × per atom = 1 / 8 × 8 = 1
at the face position, z = 1 / 2 × per atom = 1 / 2 × 6 = 3
the empirical formula for the compound is axz₃.
Thus, a solid with a cubic unit cell contains atoms a, x, and z. the a atom is in the body center position, the x atoms are at each corner, and the z atoms are on each face. based on this structure the empirical formula of the compound would be axz₃.
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if 12.8 g lead(ii) sulfate (303.25 g/mol) precipitates when excess potassium chloride is added to 1.65 l of a water sample, what is the molar concentration of pb2 in the sample?
The molar concentration of pb2 in the sample is M = 0.0256M.
Solution:
since the volume of the solution is 1.65 due to the fact that the addition of the reactants is not enough to significantly modify the reaction's volume, the resulting molar concentration of the lead (II) ions is:
[tex]M = \frac{n_{pb2+} }{V} = 0.0422molpb^{2+}[/tex]
M = 0.0256M.
Molarity is the most effective way of expressing the concentration of a solute in a solution. Molarity units are a traditional and widely used concentration method. It is the number of moles of the target substance dissolved in 1 liter of solution. Concentration indicates the mass concentration of the solution.
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classify each compound as ionic or molecular
Answer:
A molecular compound is a molecule with covalent bonds between its atoms because they have a slight difference in electronegativity and more than half-filled valence shells. They tend to be molecules composed of nonmetals. On the other hand, ionic compounds are molecules with a nonmetal and a metal bonded by ionic bonds due to the difference between their electronegativities being significant. So, to determine if a compound is molecular or ionic, the type of elements in the compound and the difference between their electronegativities have to be considered.
Which THREE answer choices are CORRECT?
What answer choice is correct for 21?
What answer choice is correct for 14?
What answer choice is correct for 11?
What answer choice is correct for 4?
21) The correct description of the compounds are options a b c.
14) The correct chemical names are b c d
11) Li forms an ionic compound with fluorine
4) The ending of name (c) would differentiate the two compounds.
The functional group on the chain is carboxyl (a)
What is the structure of a compound?We know that the structure of the compound would have to do with the way that the compound can be written. In this case, we have the compound that have been shown and then we have some statements about the molecules.
We must note that the structures show us how the atoms that are in the compounds can be arranged and then we can be able to deduce the structure of the molecule that has been shown.
The compound on the right hand side is a cyclic compound while the compound on the left hand side is a long chain compound. We can now be able to count up the number of the hydrogen and the carbon atoms that are present in each of the compounds.
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