Which of the chemicals observed during the flame tests are a result of continuous emission and...
Which of the chemicals observed during the flame tests are a result of continuous emission and which is a result of a line emission (between the nitrate salts, and the Fe and Mg metal powders)? What evidence do you have to support your conclusion?
Homework Answers
Flame test:
Flame tests are useful because gas excitations produce line emission spectrum for an element.
When atoms of gas/vapour are excited,their electrons are able to move from ground state to higher
energy states.As they return to ground states,they emit photon of very specific energy.Their energy
corresponds to specific wavelength and hence produces particular color.Each element has its own
definite line emmision spectrum, for example: copper produces blue flame .
Fe produces golden color flame and Mg produces intense white flame .Nitric salts produces
red color flame . One can identify the element by color of flame they produce .
Add Answer to:
Which of the chemicals observed during the flame tests are a
result of continuous emission and...
Hello, i did a lab where i was given a sample of contaminated water and must determine the identity of the metals and m...
Hello, i did a lab where i was given a sample of contaminated water
and must determine the identity of the metals and must percipitate
one out. I was able to determine the identity of metal Y which is
aluminium and metal X which is lithium. Im confused on part 3
though. lithium and alumnium are soluble in almost anything and i
cant use hydroxide or carbonate since lithium is in there, some
help please! I would also like to...
Consider the following data, which result from two independent samples: • GroupA:1,4,7 • GroupB:5,2,8 We are...
Consider the following data, which result from two independent
samples:
• GroupA:1,4,7 • GroupB:5,2,8
We are interested in examining the difference in sums between
the two groups (A minus B) by using a permutation test. The
permutation distribution (for the 20 different possible
permutations) is shown below (note that it only contains odd
values).
a) (3 points) What is the observed value of the test
statistic?
b) (2 points) What is the p-value for a one-sided greater
alternative?
c) (2...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
Use the information and data you gathered during the lab to answer the following questions. Describe...
Use the information and data you gathered during the lab to answer the following questions. Describe the materials you chose for each structure in your cell models and briefly explain why you chose that particular material. Chromosomes: Nuclear envelope: Centrioles: Spindle: When looking at the onion slide under the microscope, what stage were the majority of the cells in? Why do you think that is? What evidence from the onion root slide shows that mitosis is a continuous process, not...
Serial correlation, also known as autocorrelation, describes the extent to which the result in on...
Serial correlation, also known as autocorrelation, describes the extent to which the result in one period of a time series is related to the result in the next period. A time series with high serial correlation is said to be very predictable from one period to the next. If the serial correlation is low (or near zero), the time series is considered to be much less predictable. For more information about serial correlation, see the book Ibbotson SBBI published by...
QUESTIONS 1. In your own words, explain how the components of a mixture are separated during...
QUESTIONS 1. In your own words, explain how the components of a mixture are separated during thin layer chromatography. Do not explain how to perform TLC; in other words do not explain the procedure. 2. Explain the purpose of the UV lamp in this experiment. 3. Why must you use pencil, not pen, when you make marks on the TLC plate? How do you know? Be sure to 4. Which substances were in the OTC pain reliever? discuss your Rr...
2) A study done in 2016 showed that 38% of drivers admitted to text messaging while driving. A researcher decides to conduct another study to see if things have changed since then. The resea...
2) A study done in 2016 showed that 38% of drivers admitted to text messaging while driving. A researcher decides to conduct another study to see if things have changed since then. The researcher wants the new study to have no more than a confidence level of 95%. results? 4% error with a How many responses does the researcher need to achieve these b) There is not enough evidence to reject the claim d) There is not enough evidence to...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you obser after completing the halide test, and what would that observation lead you to conclude? Organic Laboratory Technique Primer Sodium Fusions and lon Testing Background: The elements that commonly occur in organic compounds along with carbon, hydrogen, and oxygen, are: nitrogen sulfur, and the halogens. The detection of these latter three elements depends on converting them into water soluble lons (CNS , and X...
procedure and test result QUESTIONS 1. The first line in the procedure states that all of...
procedure and test result
QUESTIONS 1. The first line in the procedure states that all of the cations have either nitrate or chloride as the counter lon. Explain why all of the cations have either nitrate ion or chloride ion as the counter ion. Why are other anions not used? 2. The second line in the procedure states that all of the anions have either sodium or potassium ion as the counter ion. Explain why all the anions have sodium...
PART A 1. Based on your observations, which is the stronger oxidizing agent, chlorine (bleach) or...
PART A 1. Based on your observations, which is the stronger oxidizing agent, chlorine (bleach) or iodine? Provide a one-sentence reason why your answer follows from your observation. 2. a. Predict whether NaOBr would be able to oxidize I to iodine (I) or whether, rather, I would oxidize Br to Br+. b. On the basis of your prediction formulate a periodic trend for oxidizing power. Does it increase as you go down the periodic table or does it decrease? c....
Hello, i did a lab where i was given a sample of contaminated water
and must determine the identity of the metals and must percipitate
one out. I was able to determine the identity of metal Y which is
aluminium and metal X which is lithium. Im confused on part 3
though. lithium and alumnium are soluble in almost anything and i
cant use hydroxide or carbonate since lithium is in there, some
help please! I would also like to...
Consider the following data, which result from two independent
samples:
• GroupA:1,4,7 • GroupB:5,2,8
We are interested in examining the difference in sums between
the two groups (A minus B) by using a permutation test. The
permutation distribution (for the 20 different possible
permutations) is shown below (note that it only contains odd
values).
a) (3 points) What is the observed value of the test
statistic?
b) (2 points) What is the p-value for a one-sided greater
alternative?
c) (2...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
QUESTIONS 1. In your own words, explain how the components of a mixture are separated during thin layer chromatography. Do not explain how to perform TLC; in other words do not explain the procedure. 2. Explain the purpose of the UV lamp in this experiment. 3. Why must you use pencil, not pen, when you make marks on the TLC plate? How do you know? Be sure to 4. Which substances were in the OTC pain reliever? discuss your Rr...
2) A study done in 2016 showed that 38% of drivers admitted to text messaging while driving. A researcher decides to conduct another study to see if things have changed since then. The researcher wants the new study to have no more than a confidence level of 95%. results? 4% error with a How many responses does the researcher need to achieve these b) There is not enough evidence to reject the claim d) There is not enough evidence to...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you obser after completing the halide test, and what would that observation lead you to conclude? Organic Laboratory Technique Primer Sodium Fusions and lon Testing Background: The elements that commonly occur in organic compounds along with carbon, hydrogen, and oxygen, are: nitrogen sulfur, and the halogens. The detection of these latter three elements depends on converting them into water soluble lons (CNS , and X...
procedure and test result
QUESTIONS 1. The first line in the procedure states that all of the cations have either nitrate or chloride as the counter lon. Explain why all of the cations have either nitrate ion or chloride ion as the counter ion. Why are other anions not used? 2. The second line in the procedure states that all of the anions have either sodium or potassium ion as the counter ion. Explain why all the anions have sodium...
PART A 1. Based on your observations, which is the stronger oxidizing agent, chlorine (bleach) or iodine? Provide a one-sentence reason why your answer follows from your observation. 2. a. Predict whether NaOBr would be able to oxidize I to iodine (I) or whether, rather, I would oxidize Br to Br+. b. On the basis of your prediction formulate a periodic trend for oxidizing power. Does it increase as you go down the periodic table or does it decrease? c....
Most questions answered within 3 hours.
-
1-Write an algorithm to get two numbers from the user (as
inputs) and calculate the sum...
asked 28 minutes ago -
Define white-collar crime. What is the difference between
offender and offense-based definitions of white-collar crime? What...
asked 1 hour ago -
Consider a reaction which is 1st order with respect to A and 1st
order with respect...
asked 1 hour ago -
c++
The length of the hypotenuse of a right-angled triangle is the
square root of the...
asked 1 hour ago -
When a metal rod is heated, not only its resistance but also its
length and cross‐sectional...
asked 1 hour ago -
write a c++ program that computes the L^1 - Norm of a given
vector (L^1 norm...
asked 1 hour ago -
A manufacturer of banana chips would like to know whether its
bag filling machine works correctly...
asked 1 hour ago -
Complete the chapter case, "Turnover Analysis".
Chapter Case
Turnover Analysis
You recently completed your company’s new...
asked 1 hour ago -
What is the pH of solutions having the following H3O+
concentrations? Identify each as acidic, basic,...
asked 1 hour ago -
How does over-voltage of the diode usually occur?
asked 2 hours ago -
If you step on a dirty nail, your doctor will recommend you
update your Tetanus vaccination....
asked 2 hours ago -
Suppose that decreases in the price of milk lead to decrease s
in the retail prices...
asked 2 hours ago