If the bond length in a XY molecule is 212,
what will be the covalent radius of atom X, if
the covalent radius of Y atom is 93.
O
119
2.27
128
3
Answer:
The correct answer is 119.
Explanation:
We are given the bond length of XY is 212.
The covalent radius of Y = 93.
Now this means that the bond length(R) is sum of the radio of X and Y Atom.
So, R(XY)=r(X)+r(Y)
212 = r(X)+93
r(X)= 119.
Therefore, the covalent radius of X is 119.
I hope this helps, have a good day! :D
Bond length is the distance between two bonded atoms. The covalent radius of X in XY molecule with bond length 212 and Y with a covalent radius of 93, is 119.
What is covalent radius?Covalent radius is the measure of the atomic size bonded with another atom through covalent bond. Covalent bonds are formed between non-metals with comparable electronegativities.
Bond length of molecule is the distance between the two bonded atom. Mathematically bond length of a covalent compound is the sum of covalent radius of the two bonded atoms.
The bond length of the molecule XY is given as 212 and the covalent radius of Y atom is 93. The bond length 212 is the sum of covalent radius of Y and covalent radius of X.
Covalent radius of X = 212 - 93 = 119.
Therefore, covalent radius of X atom in the XY molecule with bond length 212 and Y atom with covalent radius of 93 is 119 thus, option a is correct.
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How many moles are in 9.27 x 10^22 atoms of silicon
The number of moles are in 9.27 x [tex]10^{22}[/tex] atoms of silicon is 0.153
The number of atoms is given as follows;
Atoms= nxNa
9.27x[tex]10^{22}[/tex]=nx6.022x[tex]10^{23}[/tex]
n=9.27x[tex]10^{22}[/tex]/6.022x[tex]10^{23}[/tex]
n=1.53x[tex]10^{-1}[/tex]
n=0.153
The number of moles n, is 0.153
The International System of Units uses the mole (symbol: mol) as the unit of material quantity. The number of elementary entities of a certain substance are present in an item or sample is determined by the quantity of that material.The mole, symbol mol, is the unit of amount of substance.Mole is a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, ions, etc.To learn more about mole visit:
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Which process allows liquid water on the surface to enter the atmosphere?
evaporation
condensation
sublimation
transpiration
When 10g of hydrogen gas is combined with 26g of nitrogen gas to form ammonia, what is the limiting reagent?
the limiting reagent is nitrogen gas.
steps:
write out balanced equation: 3H2 + N2 = 2NH3
convert to moles to find how much NH3 each yields
find molar mass of each
10 g H2 (1 mol/2.016g) (2NH3/3H2) = 3.31 mol NH3
26g N2 (1mol/28.02g)(2NH3/1N2)=1.86 mol NH3
since N2 yields less NH3, it is the limiting reagent.
Determine the number of protons, neutrons, and electrons present in each of the atoms.
53 Cr
protons:
neutrons:
electrons:
Answer:
protons: 24
neutrons: 29
electrons: 24
Explanation:
0.3060 x 10^17 atoms of Kr(g) = how many moles ?
There are 0.05 x [tex]10^{-6}[/tex] number of moles of Kr(g) having 0.3060 x [tex]10^{17\\}[/tex]atoms .
A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.
Calculation .
One mole of the any atoms contains 6.022 x [tex]10^{23}[/tex] atoms .
So , the number of moles of Kr(g) having 0.3060 x 10^17 atoms is calculated as ,
number of moles of Kr = 0.3060 x [tex]10^{17\\}[/tex]atoms x 1 mole / 6.022 x [tex]10^{23}[/tex]atoms
number of moles of Kr = 0.05 x [tex]10^{-6}[/tex] mole
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Forest food web………….
Forest Food web consists of the producers, main consumers, secondary consumers, scavengers, and decomposers. Food web is the collection of the large number of food chains.
What are some examples of food webs?Numerous food chains make up a food web. As animals seek food, a food chain only follows one way. As an example, a hawk consumes a snake following the consumption of a frog, a grasshopper, and grass. A food web illustrates the numerous relationships between plants and animals.
What are the different types of food web?1. Primary consumers
2. Secondary consumers
3. Tertiary consumers
4. Decomposers or phytoremediators
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The U.S. Environmental Protection Agency (EPA) sets limits on
healthful levels of air pollutants. The maximum level that the EPA
considers safe for lead air pollution is 1.5 μg/m³
By applying Avogadro's constant, the number of lead atoms present in your lungs is equal to 2.49 × 10¹³ atoms of lead.
What is a conversion factor?A conversion factor can be defined as a number that is typically used to convert (change) a number in one (1) set of units to another, either by dividing or multiplying.
Generally speaking, an appropriate conversion factor to an equal value must be used when it is necessary to perform any mathematical conversion.
Conversion:
1.5 μg lead = 1 m³ of air.1 m³ = 1000 Liters (L)1 mole of lead = 207.2 grams of lead.1 gram (g) = 10⁶ microgram (μg).1 mole of lead = 6.022 × 10²³ lead atoms.Next, we would convert the volume of lungs in liters to meter cube (m³):
Volume of lungs = 5.6/1000
Volume of lungs = 5.6 × 10⁻³ m³.
Assuming the whole volume of lungs is filled with air, the number of lead atoms present is given by:
Number of lead atoms = 5.6 × 10⁻³ × 1.5
Number of lead atoms = 8.55 × 10⁻³ μg of lead.
Next, we would convert the mass of lead into moles of lead as follows:
Moles of lead = 8.55 × 10⁻³ × 1/207.2 × 1/10⁶
Moles of lead = 8.55 × 10⁻³/(207.2 × 10⁶)
Moles of lead = 4.13 × 10⁻¹¹ mole of lead.
Finally, we would determine number of lead atoms present by using Avogadro's constant:
Number of lead atoms = 4.13 × 10⁻¹¹ × 6.022 × 10²³
Number of lead atoms = 2.49 × 10¹³ atoms of lead.
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Complete Question:
The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants. The maximum level that the EPA considers safe for lead air pollution is 1.5 μg/m³. If your lungs were filled with air containing this level of lead, how many lead atoms would be in your lungs? (Assume a total lung volume of 5.60 L.)
A car is traveling 65.0 miles per hour. Convert this to meters per second.
Answer:
29.0576
Explanation:
To convert miles per hour to meters per second you divide the speed value by 2.237.
Given that the density of gold is 19.3 g cm-3, calculate the volume, V, of a gold nugget with a mass of 4.74 g.
Rene grew bacteria from mouth on special plates in the lab she placed drops of different mouthwashs on bacteria on each plate
The correct answer is Test the hypothesis with an experiment.
Rene grew bacteria from mouth on special plates and now she is conducting a research on those bacterias by dropping different mouthwash on them to find out effect of mouthwashes on bacteria. This comes under the category of test the hypothesis with an experiment. When performing experiments and investigating observations, the scientific method is a technique that is used.This method's objective is to identify the connections between cause and effect in diverse contexts and applications.There are total seven steps of scientific method:Ask the questionPerform research Establish your hypothesisTest your hypothesis by conducting experimentMake an observation Analyse the result and draw the conclusionPresent the findingsThe key goal of 4th step is to gather information and facts to test our idea.
Therefore, Rene is on the 4th step of scientific method.
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If 31.5 grams of bromine and 14.0 grams of chlorine combine to form bromine monochloride, how many grams of bromine monochloride must form?
The correct answer is 45.21 g.
This issue will be resolved with the aid of the idea that chemical equilibrium is the rate of reversible processes at which the concentration of the reactants and products does not vary over time. The rate of reaction is exactly proportional to the raised to the power equal to the relevant stoichiometric coefficient, states the law of mass action.
Bromine monochloride is created when 31.5 grammes of bromine and 14.0 grammes of chlorine react.
Br2 + Cl2 ---> 2BrCl
mol Br2= 31.5/160g/mol= 0.196mol
mol Cl2= 14g/70.906g/mol= 0.197mol
Number of moles of BrCl formed = 2×0.196= 0.392 mol.
mass BrCl= 0.392 mol x 115.357g/mol= 45.21 g
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Which of the following elements would you expect to be most reactive, based
on the number of valence electrons it has?
O A. Potassium (K)
OB. Titanium (Ti)
O C. Iron (Fe)
O D. Calcium (Ca)
A. Potassium
this is because it only has one valence electron, which can be very easily removed, hence it's reactivity.
Kp equals 25 at 500c. The pressure of butane is 20. atm and isobutane is 0.0 atm Calculate the pressure of both gases at equilibrium.
The pressure of butane is 20 P(butane) = 0.77 atm and pressure of P(isobutane) = 19.2 atm
Isomerization reactionIsomerization is the transformation of a molecule into a different isomer, and it can take one of two forms: cis or trans. Protein isomerization was first described in 1968 as a method of dramatically altering protein conformation by disrupting polypeptide secondary structure.
Isomerism is caused by two main factors: Difference in atom linking mode. Difference in the spatial arrangement of atoms or groups. The difference in the mode of atom linking is one of the two main causes of isomerism. Difference in the spatial arrangement of atoms or groups.
Types :The two main types of isomerism are structural or constitutional isomerism, in which the bonds between the atoms differ, and stereoisomerism or spatial isomerism, which occurs when the bonds are similar but the relative positions of the atoms differ.
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I understand the question you are looking for
For the isomerization reaction:
butane ⇌ isobutane
Kp equals 25 at 500°C. If the initial pressures of butane and isobutane are 20. atm and 0.0 atm, respectively, what are the pressures of the two gases at equilibrium?
A) P(butane) = 20 atm and P(isobutane) = 0.80 atm
B) P(butane) = 19.2 atm and P(isobutane) = 0.77 atm
C) P(butane) = 0.77 atm and P(isobutane) = 19.2 atm
D) P(butane) = 0.80 atm and P(isobutane) = 20. atm
Calculate the density, in g/mL, of a liquid that has a mass of 0.115 g and a volume of 0.000275 L.
Density of the liquid is 0.418g/mL
The liquid sample has a volume of 0.000275 L. We can convert this to mL (because we are asked to find the density in g/mL):
mass of liquid= 0.115 grams
volume of the liquid, V= 0.000275L
Density is defined as the ratio of mass per unit volume
Now we must convert the unit of volume from L to ml as liter is SI unit which goes with Kilogram
volume in ml = 0.000275 ml/l x 1000 =0.275 ml
Density d = mass/volume
= 0.115/ 0.275
= 0.418 g/mL
Hence the density of the liquid is 0.418 g/mL
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I need help please:
Zootopia:
This movies theme is on stereotypes within culture and the influence police have on the Publics perception. Explain how this can happen and it’s impact on civil and criminal justice.
Answer:
down below
Explanation:
The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.
(Trial 1)
Convert mass to moles for both reactants. (round to 2 significant figures.)
2.50 g CuCl equals
moles
0.50 g Al equals
moles
DONE
Answer:
CuCl has 0.025 and Al has 0.018 moles
Answer:
.019 and .0093
Explanation:
Order these materials from best to worst conductors of heat
Chalk, Air, Iron, stainless steal, copper, concrete, diamond and oak.
Answer:copper,stainless steel,iron,diamond,oak,calk,air
Explanation:your metlas is your meterials that absorbs most heat'
What is Judy Hopps reception like once she joins the Zootopia police force? Why is this?
Question 9(Multiple Choice Worth 2 points)
(03.01 LC)
Which of the following is an example of matter?
O Electricity
O Heat
O Sound
O Water
A sextant resembles which mathematical instrument?
Answer:
quadrant
Explanation:
sextant (astron.) instrument resembling a quadrant having a graduated are equal to ⅙ of a circle.
please rate brainliest if helps and follow
Which of the following statements correctly describes density?
Answer:
Helper
Explanation:
is the expaltin of the explatin
how many moles are present in 1.0 m3 O2 at STP
Answer:
Explanation:0.089mol
at STP 22.4l of any ideal gas is the volume of one mole which means the number of moles in 02 is222.4=0.089.
Concerning the rate law, Rate = K[A]²[B], what are appropriate units for the rate
constant k?
The correct answer is M^-1s^-1.
The proportionality constant in the rate law expression, known as the rate constant or the particular rate constant, represents the relationship between the rate of the reaction and the concentration of the reacting species. Because it equals the rate of the reaction when the concentration of the reactants is assumed to be unity, it is known as the specific rate constant. The speed and direction of a chemical reaction are measured by a reaction rate constant. We are aware that the values of the Rate constant vary with temperature.
The given rate law is:
Rate = k[A][B]
The units of rate are always Ms^-1 and the units of [a] are mol so: mol*s^-1
Putting the units in the given rate law:
Rate = k[A][B]
Ms^-1=k×(M)×(M)
k=Ms^-1/M^2
k=M^-1s^-1
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Help help help please
How do you find the number of
electrons in a neutral atom?
What is the overall chargeon particles with the subatomic makeups given if there are3 protons, 3 neutrons, and 2 electrons?
Answer:
+1
Explanation:
The neutrons do not affect the overall charge of the particle. Protons have a positive charge and electrons have a negative charge. Since the protons outnumber the electrons by one, there is an overall charge of +1.
Here is a more in depth explanation: if there are 3 protons, each which have a value of +1, the protons contribute a +3 charge. If there are 2 electrons, each which have a value of -1, the electrons contribute a -2 charge. When you add these two charges, you are left with an overall charge of +1 (+3 + (-2) = +1).
Give the electron configuration using the crystal field theory of the following complexes and show your configuration in the the crystal field diagram (N.B calculate the oxidation number of metals 1st).
1. [Co(NH3)5Cl]Br2
2. Na3[Fe(CN)6]
The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
What is the crystal field theory?According to the crystal filed theory, the ligands serve as point charges and when they are introduced to the symmetrical octahedral crystal field, the field splits and the there is a barry center with electrons that are above and below the barry center depending on their energy.
Hence, we can see that cobalt II ion is a d7 specie with electron configuration; [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^7[/tex]. The iron III ion is a d5 specie having electron configuration[tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^5[/tex]. The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
The crystal field diagram of each of the ions is shown in the image attached.
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Identify the arrows that represent the process of cooling.
liquid
gas
solid
The arrows B, C, and E represent the process of cooling.
Solid state: In the solid state, the molecules are arranged in a regular and fixed pattern. The molecules in a solid are closely packed that is the solid particles can not move.
Liquid state: In the liquid state, the molecules are present in an irregular pattern. The molecules are closely packed but particles can move.
Gaseous state: In the gaseous state, the molecules are present in an irregular manner. The molecules of gases are not closely packed and can move freely.
Therefore, the solid changes to liquid on heating, and the liquid changes to solid after cooling.
Liquid changes to a gaseous state on heating while gases changes to liquid on cooling.
Solid changes to gas on heating and gases change to solid after cooling.
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Write an equation that shows the formation of the bromide ion from a neutral bromine atom.
The equation that shows the formation of the bromide ion from a neutral bromine atom is as follows: Br + e- → Br-
What is an ion?Ion is the atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
An atom becomes an ion when it loses or gains electrons.
According to this question, bromine atom is neutrally charged but quicky becomes charged into an ion when it gains one electron. The equation is represented as follows:
Br + e- → Br-
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