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What else can I help you with?
How could you get a sample if soluble salt?
To get a sample of soluble salt, you can dissolve the salt in water, filter out any impurities, then evaporate the water to leave behind the salt crystals. This will give you a pure sample of the soluble salt.
What is meant by 99 percent assay of ethyl acetate?
That is the concentration of the compound within a solvent. It's basically the purity of your sample of the compound (in this case ethyl acetate). So it could be equal to or greater than 99% ethyl acetate and the rest would be ethanol or some chemical that the ethyl acetate is dissolved in.
Why we added cotton wool dipped in lead acetate solution used in the limit test for arsenic?
Cotton wool dipped in lead acetate solution is used in the limit test for arsenic because lead acetate reacts with any arsenic present in the sample to form a yellow precipitate of lead arsenate. This color change helps to visually identify the presence of arsenic in the sample, allowing for qualitative detection within a set limit.
What compounds are responsible for the result of lead acetate test?
The lead acetate test is used to detect the presence of sulfides in a sample. This test results in the formation of a black precipitate of lead sulfide (PbS) when lead acetate is added to a solution containing sulfide ions. Lead sulfide is insoluble and appears as a dark-colored solid.
What is the role of sodium acetate in DNA extraction?
Sodium acetate is used in DNA extraction to precipitate out proteins and other contaminants. By adding sodium acetate to the DNA sample, it creates a high-salt environment which helps DNA molecules come out of solution and form a visible pellet, making it easier to separate from the rest of the sample. This purification step ensures a higher yield and purity of extracted DNA.
What will be the sample size?
Number of Sample in set of observation.
What is an event sample observation?
it is an observation that looks closey at one aspect of a child's development.
How could you get a sample if soluble salt?
To get a sample of soluble salt, you can dissolve the salt in water, filter out any impurities, then evaporate the water to leave behind the salt crystals. This will give you a pure sample of the soluble salt.
What is meant by 99 percent assay of ethyl acetate?
That is the concentration of the compound within a solvent. It's basically the purity of your sample of the compound (in this case ethyl acetate). So it could be equal to or greater than 99% ethyl acetate and the rest would be ethanol or some chemical that the ethyl acetate is dissolved in.
What is the sample standard deviation of 27.5?
A single observation cannot have a sample standard deviation.
How much error is expected between the sample mean and population mean?
0. The expected value of the sample mean is the population mean, so the expected value of the difference is 0.
What group of subjects selected for observation in an empirical study?
sample
As the sample size increases what does the expected value of M do?
You have not defined M, but I will consider it is a statistic of the sample. For an random sample, the expected value of a statistic, will be a closer approximation to the parameter value of the population as the sample size increases. In more mathematical language, the measures of dispersion (standard deviation or variance) from the calculated statistic are expected to decrease as the sample size increases.
What is the expected shape of the distribution of the sample mean?
The distribution of the sample mean is bell-shaped or is a normal distribution.
Is uranyl acetate a negative stain?
Yes, uranyl acetate is used as a negative stain in electron microscopy.
What happens to the expected value of M as sample size increases?
Decreases
Why we added cotton wool dipped in lead acetate solution used in the limit test for arsenic?
Cotton wool dipped in lead acetate solution is used in the limit test for arsenic because lead acetate reacts with any arsenic present in the sample to form a yellow precipitate of lead arsenate. This color change helps to visually identify the presence of arsenic in the sample, allowing for qualitative detection within a set limit.
