1. During identification of evidence, you used a pH meter and ultraviolet spectrometer. Explain which of...
1. During identification of evidence, you used a pH meter and ultraviolet spectrometer. Explain which of the two techniques gives you better identification (not more than three lines).
Homework Answers
ultra spectrometer is better technique to identifie the molecules. because the ph meter reading is effected by several other factors.
it gives the identification in the range but not exact value.
Temp also effects the ph meter reading.
Every molecule has definite absortion range which is constant at any time..
Add Answer to:
1. During identification of evidence, you used a pH meter and
ultraviolet spectrometer. Explain which of...
which gives a better measure of the ph: universal ph paper or a ph meter? Post-Lab...
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly...
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.44. You use a significance level of α=0.005α=0.005. H0:p=0.44H0:p=0.44 H1:p>0.44H1:p>0.44 You obtain a sample of size n=494n=494 in which there are 236 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... less than...
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly...
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.88. You use a significance level of α=0.01α=0.01. H0:p=0.88H0:p=0.88 H1:p>0.88H1:p>0.88 You obtain a sample of size n=587 in which there are 528 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... a) less...
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly...
You are conducting a study to see if the accuracy rate for
fingerprint identification is significantly more than 0.66. You use
a significance level of α=0.001α=0.001.
H0:p=0.66H0:p=0.66
H1:p>0.66H1:p>0.66
You obtain a sample of size n=434n=434 in which there are 297
successes.
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic =
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value =
The p-value is...
less than...
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red...
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red cabbage indicator, pH paper, and a pH meter). Did they give similar results? Which is the most accurate? Explain. 2. The hydroxide ion concentration of a solution is 2.5 x 10 M. What is the hydronium ion concentration? a) What is the pH? b) Is the solution acidic, basic, or neutral? c) 3. A few drops of HCl are added to two solutions, A...
Which of the following would provide evidence that the CAPM cannot fully explain the stock returns...
Which of the following would provide evidence that the CAPM cannot fully explain the stock returns within different groups? Group of answer choices A. Small stocks tend to earn higher returns than big stocks, while the beta’s of these two groups of stocks are similar. B. Value stocks tend to earn higher returns than growth stocks, while the beta’s of these two groups of stocks are similar. C. Tech stocks tend to do worse than consumer-staples stocks during the recession....
You’re studying proteins and the effect of pH on those proteins. For that purpose you are...
You’re studying proteins and the effect of pH on those proteins. For that purpose you are going to make two buffers. First, how would you prepare a 2L of a 10 mM Phosphate buffer at pH of 7.4? You have – Solid KH2PO4 Solid K2HPO4 10M KOH (as much as you need) purified water pH meter balance, glassware and anything else you need. The three pKa values for phosphoric acid (from the CRC Handbook of Chemistry and Physics) are 2.16,...
Identification of unknown Bacteria by sequencing rDNA Having a little trouble understanding the PCR process. This...
Identification of unknown Bacteria by sequencing rDNA Having a little trouble understanding the PCR process. This is a lab we did and some homework questions regarding the sequencing rDNA to find unknown bacteria. I hope by answering these I can have better understanding of the process. The more descriptive the better. Thank you! 1. A. Name the gene that we will be sequencing in order to identify the unknown. Explain why this region is considered to be the target for...
Can you please show math, formulas and explain. 1. If the pH of a solution is...
Can you please show math, formulas and explain. 1. If the pH of a solution is 7.5, what is the pOH? pH = - log[H+] [H+][OH-] = 1.0 x 10-14 M2 2. Given the Ka values for two acids, determine the pKas and which is a stronger acid. Ka1 = 1.38 × 10–7 Ka2 = 1.70 × 10–4 3. The pH of a sample of blood is 7.4, while gastric juice is pH 2.4. The blood sample has: A) one...
1. How pH of so is evaluated? Does soil pH upset plant growth experiment? Why KCl is used in pH m...
1. How pH of so is evaluated? Does soil pH upset plant growth experiment? Why KCl is used in pH meter? How will you formulate 0.1 M solution of KOH? What is pH of electrode storage solution? 2. What is the use of point of zero charge of any adsorbent? What is its use in electrochemistry? What are the dissimilarities between zeta potential and point of zero charge? 3. What are the varieties of fats in food? In what way...
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
You are conducting a study to see if the accuracy rate for
fingerprint identification is significantly more than 0.66. You use
a significance level of α=0.001α=0.001.
H0:p=0.66H0:p=0.66
H1:p>0.66H1:p>0.66
You obtain a sample of size n=434n=434 in which there are 297
successes.
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic =
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value =
The p-value is...
less than...
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red cabbage indicator, pH paper, and a pH meter). Did they give similar results? Which is the most accurate? Explain. 2. The hydroxide ion concentration of a solution is 2.5 x 10 M. What is the hydronium ion concentration? a) What is the pH? b) Is the solution acidic, basic, or neutral? c) 3. A few drops of HCl are added to two solutions, A...
1. How pH of so is evaluated? Does soil pH upset plant growth experiment? Why KCl is used in pH meter? How will you formulate 0.1 M solution of KOH? What is pH of electrode storage solution? 2. What is the use of point of zero charge of any adsorbent? What is its use in electrochemistry? What are the dissimilarities between zeta potential and point of zero charge? 3. What are the varieties of fats in food? In what way...
Most questions answered within 3 hours.
-
Other decisions about scientific claims can have a much broader
impact.ENERGYarrow-10x10.png, environment, health, security - all...
asked 21 minutes ago -
I need to write a research paper and work cited about this
topic: The United States...
asked 44 minutes ago -
Hello! I was wondering if I could have some help?
If the vapor pressure of carvone...
asked 1 hour ago -
An economist wants to estimate the mean per capita income (in
thousands of dollars) for a...
asked 1 hour ago -
What would be the input/output characteristic of a circuit
obtained by putting two of your 2's-complementers...
asked 1 hour ago -
In Drosophila, the transition from the syncytial blastoderm
stage to the cellular blastoderm stage is a...
asked 1 hour ago -
Project management question:
Name 3 different types of resources (hint: humans are one
type)
asked 2 hours ago -
Consider the following reaction: C 2H 2( g) + 2H 2( g) C 2H 6(
g)...
asked 2 hours ago -
Consider a 1.0 L buffer containing 0.092 mol L-1 HCOOH and 0.100
mol L-1 HCOO-. What...
asked 2 hours ago -
Koch Realty has owned a vacant land with a FMV of
$775,000 and an adjusted basis...
asked 2 hours ago -
It is estimated 29% of all adults in United States invest in
stocks and that 85%...
asked 2 hours ago -
What does a 2-sided p value of 0.04 mean? (I am not asking if it
is...
asked 2 hours ago