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What is Relative Fluorescence Intensity?
Relative fluorescence intensity is a measure of the amount of fluorescence emitted by a sample compared to a reference sample. It is often used in fluorescence spectroscopy to quantify the fluorescence signal from a sample relative to a standard for comparison and analysis.
How do you calculate purity on anhydrous basis?
To calculate purity on an anhydrous basis, you first need to determine the mass of the pure substance in the sample and the total mass of the sample, excluding any water content. This is typically done by drying the sample to remove moisture and then weighing it. The purity percentage can then be calculated using the formula: [ \text{Purity (%)} = \left( \frac{\text{mass of pure substance}}{\text{mass of anhydrous sample}} \right) \times 100 ] This gives you the purity of the substance relative to its anhydrous form.
What is the definition of biased sample for math?
A biased sample is a Statistical Sample in which the sample is biased or have more samples of the things that is being influenced.
How do you calculate density using a formula?
Density of a substance = (mass of a sample of the substance) divided by (volume of the same sample)
What effect does the amount of the sample of a substance affect its density?
it has no effect. density of a substance is the same no matter the size or shape of the sample.
How many moles of a substance with an atomic mass unit (amu) of 12 are present in a given sample?
To find the number of moles in a sample, divide the sample's mass by the substance's atomic mass unit (amu). For a substance with an amu of 12, the number of moles in the sample can be calculated by dividing the sample's mass by 12.
What is absolute sample size?
It is the number of elements in the sample. By contrast, the relative sample size is the absolute sample size divided by the population size.
What is the definition for unbiased sample?
A sample is Unbiased if everyone in the sample have an equal chance of being selected
Why is the density of a substance independent of sample size?
Density is an intensive quantity which means it is independent of size. This can be seen from the definition of density. Density = mass/volume So if the sample size increases than so does the mass, but the density remains unchanged.
How can one determine the relative abundance of isotopes in a sample?
One can determine the relative abundance of isotopes in a sample by using mass spectrometry, a technique that separates and measures the mass-to-charge ratio of isotopes in a sample. This allows scientists to calculate the relative abundance of different isotopes present.
What is the eqyaion for density?
Density of a substance = (mass of a sample of it)/(volume of the same sample)
How many lb-moles of substance are present in the given sample?
To determine the number of lb-moles in a sample, divide the weight of the sample in pounds by the molecular weight of the substance. This will give you the number of lb-moles present in the sample.
