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What is the total number of moles present in a 52.0 gram sample of NaN3 gram formula mass equals 65.0 mole?
Wiki User
∙ 12y ago
.8 moles
Wiki User
∙ 12y ago
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The density is the ratio between the mass and the volume of a sample.
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An air sampling pump measures contaminants such as biological and environmental present in a sample of air. The sample of air is drawn into a tube which is attached to the pump. The air is vaporized and the particular contaminants presence is measured.
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How the formula of z obtained?
The formula for Z obtained is zobt equals the average of the sample (Xbar)minus the average of the population (u), divided b the standard deviation of the sample (s), divided be the square root of N. Example: Zobt= X-u ,divided by s ,divided by ,square root of N
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The same basic formula is used to calculate the sample or population mean. The sample mean is x bar and the population mean is mu. Add all the values in the sample or population and divide by the number of data values.
How many moles are present in 480g of anhydrous magnesium sulfate?
First we calculate the formula mass of the compound magnesium sulfate.Formula mass of MgSO4 = 24.3 + 32.1 + 4(16.0) = 120.4 Amount of MgSO4 in a 480g pure sample = 480/120.4 = 3.99mol There is approximately 4 moles of the compound present in a 480g sample.
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The number of moles is 2,06.
When the sample size is greater than n equals 30?
There is nothing particularly significant about a sample size of 30.
