How to explain the theory behind flame test in the easiest way- Have b.docx
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How to explain the theory behind flame test in the easiest way? Have been trying to reach out to non-science students about this. Solution Answer: The flame test is a basic test in chemistry to visually identity the presence of an unknown metal or metalloid ion based on its characteristic color change of the flame when it is burned using Bunsen flame. When heated in the flame the electrons of the metals ions get excited and upon relaxation emits characteristic visible light which is used to differentiate or confirm the presence of a particular element. e.g. Sodium gives yellow color, Aluminium gives silver white color, copper gives bluish green color. .
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How java applet security is different from java security and why exceptions are used in applets?
Solution
How java applet security is different from java security and why exceptions are used in applets?
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Solution
Ans;
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Solution
pH = pKa + log [NaF] / [HF]
pH = 2.220
pKa = - log Ka = - log [7.20 x 10 -4 ]
pKa = 3.143
2.220 = 3.143 = log [NaF] / [0.194]
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now
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How do you account for the fact that, although iodine is placed in the periodic table after tellurium, it has a lower relative atomic mass?
Solution
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how many equivalents are in 0-036 moles of Ca2+- how many equivalents.docx
how many equivalents are in 0.036 moles of Ca2+?
how many equivalents are in 0.036 moles of Ca2+?
Solution
We know,
1. Moles = Given mass /Molar mass
2. Equivalents = Given mass/ Equivalent mass
3. Equivalent mass of an ion = Molar mass / charge of the ion
From 1 and 2
Moles / Equivalents =Equivalent mass/ Molar mass
Substitute the value of Equivalent mass from 3
Then, Moles / Equivalents = (Molar mass /charge on the ion) / Molar mass = 1/charge on the ion = 1/2
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Number of equivalents in 0.036 moles Ca 2+ = 0.072
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Solution
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2 nitrates, nitrites, urea, amino acid and ammonium ions are the biological useful forms of nitrogen.
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How is wireless capacity defined and what are some of the constraints governing wireless capacity?
Solution
Wireless neteorks consist of a number of nodes which communicate with each other over a wireless channel.some wireless networks have a backbone with only the last hop being wireless.
Examples are cellular voice and data networks and mobile Ip.in others all linka are wireless.one example of such networks is multi-hop radio networks oe ad hoe networks.
some of the constraints governing wireless capacity
A fundamental problem in wireless networks is to estimate their throughput capacity - given a set of wireless nodes and a set of connections, what is the maximum rate at which data can be sent on these connections. Most of the research in this direction has focused either on random distributions of points, or has assumed simple graph-based models for wireless interference
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Solution
How java applet security is different from java security and why exceptions are used in applets?
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Solution
Ans;
Changes in recording and broadcasting technologies changed musical forms as they have led to remixes being possible. The effect did the transistor radio have on the shape of popular music is that it marketed it and helped provide a platform so that the music could reach out to people. Yes, music (or musicians) change with the introduction of video technology. Technology will make certain art forms obsolete.
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How many grams of solid sodium fluoride should be added to 1-50 L of 0.docx
How many grams of solid sodium fluoride should be added to 1.50 L of 0.194 M hydrofluoric acid solution to prepare a buffer with a pH of 2.220 ? (K a for hydrofluoric acid = 7.20E-4 )
Solution
pH = pKa + log [NaF] / [HF]
pH = 2.220
pKa = - log Ka = - log [7.20 x 10 -4 ]
pKa = 3.143
2.220 = 3.143 = log [NaF] / [0.194]
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now
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Solution
An Astronomer would use the knowledge of refraction of light to know that light bends its path when it cahnges its medium like when it travells from vacuum into air. This knowledge will help the astronmer to estimate more accurate and precise locations of sun or planets by figuring out how much the light would have bent and how farther the celestial body is from its apparent position (because of the refraction)
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How do you account for the fact that, although iodine is placed in the periodic table after tellurium, it has a lower relative atomic mass?
Solution
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how many equivalents are in 0.036 moles of Ca2+?
how many equivalents are in 0.036 moles of Ca2+?
Solution
We know,
1. Moles = Given mass /Molar mass
2. Equivalents = Given mass/ Equivalent mass
3. Equivalent mass of an ion = Molar mass / charge of the ion
From 1 and 2
Moles / Equivalents =Equivalent mass/ Molar mass
Substitute the value of Equivalent mass from 3
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Solution
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Solution
HA = H+ + A-
K = (H+)*(A-) / [ HA ] ( dissociation equation for equilibrium )
Any compound which is given to you. Suppose
CaCO3
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For this you should have rough idea about the polyatomic and monoatomic ions and their valanceis.
Dissociation is just reverse the formation of molecule.
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In dissociation one big molecule dissociate into its ions.
If you have any query please comment
If you satisfied with the solution please rate it thanks
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Solution
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be \"Main\" only if the class is public. */
class Ideone
{
public static void main (String[] args) {
// your code goes here
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Solution
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A). The color changed
B). A Single product formed from two reactants
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D). A gas formed
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E
C 2
? v
? h
i
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Cl Bri Co Cl
Solution
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Solution
1. When there is Ionic bonding
When there is Covalent bonding
When there is Metallic bonding
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When there is Covalent Bonding:
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During retirement the taxes payable would be calculated as follows :
.
How does sucrose and lactose react to Bial-'s test- How does sucrose.docx
How does sucrose and lactose react to Bial\'s test?
How does sucrose and lactose react to Bial\'s test?
Solution
Bial\'s test is a chemical test for the presence of pentoses.The components include orcinal,hydrochloric acid and ferric chloride.
ACTION OF BIAL\'S TEST ON LACTOSE-
The solution had no change and stayed a yellow colour, which indicates sugar lactose is a pyranose sugar.
ACTION OF BIAL\'S TEST ON SUCROSE-
The solution changed to an olive green colour, which indicate that the sugar sucrose is a pentose furanose sugar.
.
How did the DI change in 2013SolutionCompletelly Discussion on world c.docx
The document discusses changes to international climate change agreements in 2013. Conferences were held where countries discussed reducing carbon emissions through stages and protocols like the Nagoya and Durban Protocols. The conferences established mechanisms to protect vulnerable populations from loss and damage caused by extreme weather events and effects of climate change like rising sea levels. Developed and developing countries were tasked with presenting their plans to reduce emissions from deforestation, avoid violence, and cooperate with each other.
How do you write dissociation equations for equilibrium and how do you.docx
How do you write dissociation equations for equilibrium and how do you know what charge to put? Why are some ions 2- or 2+ and why are some 1- or 1+ etc.
Solution
HA = H+ + A-
K = (H+)*(A-) / [ HA ] ( dissociation equation for equilibrium )
Any compound which is given to you. Suppose
CaCO3
Dissociate it into ions ( Ca2+ & CO3- ) here calcium is monoatomic ion whereas CO3- ions is polyatomic ions
For this you should have rough idea about the polyatomic and monoatomic ions and their valanceis.
Dissociation is just reverse the formation of molecule.
In formation of molecule elements or polyatomic ions joined together and form one molecular formula .
In dissociation one big molecule dissociate into its ions.
If you have any query please comment
If you satisfied with the solution please rate it thanks
.
how do I create an array in java using a for loop-Solutionimport java-.docx
how do I create an array in java using a for loop?
Solution
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be \"Main\" only if the class is public. */
class Ideone
{
public static void main (String[] args) {
// your code goes here
int[] nums = new int[10];
// Fill it with numbers using a for-loop
for (int i = 0; i < nums.length; i++){
nums[i] = i + 1;
}
//print array
for (int i = 0; i < nums.length; i++) {
System.out.println(nums[i] + \" \");
}
}
}
.
how can you use pH to separate Nil) ions from Hg(I) ions- The solubili.docx
how can you use pH to separate Nil) ions from Hg(I) ions? The solubility product of Hgs is roughly 2x 1053 and that of NiS is 3 x 1019. If we wanted to separate these two ions by a differential precipitation, how might I do that? Consider the use of hydrosulfuric acid as your precipitating agent.
Solution
Hydrosulfuric acid is the acid form of Hydrogen Sulfide (H2S).
Now, we can easily see that both of the metal compound contains Sulphur (NiS and HgS). Since NiS have more Ksp, it will be more soluble in the precipitating agent. Therefore, by adding suitable amount of Hydrosulfuric acid so that we can get a concentration of sulfur which is enough to precipitate HgS.
In this way, when solubilities of two metal salts are very different, they can be separated by precipitation.
.
How can you tell that a reaction happened in the double-displacement r.docx
How can you tell that a reaction happened in the double-displacement reaction?
A). The color changed
B). A Single product formed from two reactants
C). A Precipitate formed
D). A gas formed
Solution
The correct answer is Option A,B and D
The double displacement reaction is formed when two compounds are mixed to form gas or color change due to formation of precipitate
Example:
Na2SO4 + Ba(NO3)2 ---------- BaSO4 + 2NaNO3 (BaSO4 precipitate formed)
HCl + Na2S -------- 2NaCl + H2S (gas H2S is evolved)
If acid-base, then
NaOH + H2SO4 ---- Na2SO4 + 2H2O
.
How many of these symmetry elements does this complex have- E C2 -v -h.docx
How many of these symmetry elements does this complex have?
E
C 2
? v
? h
i
The answer is 3. Please explain which ones and why. Thank you in advance!!
Cl Bri Co Cl
Solution
E is present because it\'s present in all molecules. It\'s the identity operation.
Sigma(v) is present as a plane passing through F Br and Co in a single plane. So the position of two Cls are interchangable and they are identical.
C2 is present when this axis passes through F Br and Co. When we rotate we get the same complex
.
How can you identifiy a DNS frame in wired Ethernent- 1- Is it broadca.docx
How can you identifiy a DNS frame in wired Ethernent?
1. Is it broadcast?
2. What is layer 3 protocol : IP/ARP
3. What is layer 4 protocol : TCP/ UDP
4. What clue will tell you it is a DNS frame ?(explan)
5. Is the following frame carrying DNS message?
Solution
Please find the answers below:
1) No
2) The address resolution protocol (arp) is a protocol used by the Internet Protocol (IP), specifically IPv4, to map IP network addresses to the hardware addresses used by a data link protocol.
3) TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent.
.
How would you explain to an intelligent but non-scientifically-educate.docx
How would you explain to an intelligent but non-scientifically-educated member of your family how a GPS receiver determines its location? (Don\'t worry about technical details but make sure you explain the basic physics - and geometry - principles.)
Solution
A GPS receiver is constantly receiving signals from satellites for this purpose which are orbiting the earth. We know the frequency and speed of the waves we are sending. So from the sensors in GPS we can know the time taken for the waves from satellite to reach the receiver. Now we have speed and time and we multiply them to get the distance between receiver and satellite. We take the distances from four or more such satellites and then we can pinpoint such position on earth which is at these calculated distances from these satellites. In this way we can actually position the location of a receiver using GPS within a few inches precision.
.
How can you tell what kind of primary atomic bonding is present by not.docx
How can you tell what kind of primary atomic bonding is present by noting where the involved elements are located on the periodic table?
Describe how the electronegativity difference between atoms affects the ionic/covalent character of a bond.
Why do some covalently-bonded molecules have low boiling points and others have high boiling points?
Solution
1. When there is Ionic bonding
When there is Covalent bonding
When there is Metallic bonding
2. When there is Ionic Bonding:
When there is Covalent Bonding:
3. Covalent bonds can be strong because of the sharing of electrons. The secondary bonding that occurs between chains on polymers is weak which breaks down when heated.
.
How to separate the solution of ethanol- iodine- and LiNO3 How to sep.docx
The document describes how to separate a solution containing ethanol, iodine, and LiNO3. Heating the mixture causes the low boiling ethanol and iodine to evaporate first, leaving behind the high boiling solid LiNO3. The ethanol-iodine mixture is then treated with toluene, which dissolves the iodine but not the ethanol, separating the two. Finally, evaporating the toluene recovers the iodine. The process separates all three original compounds from the solution.
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