.8 moles
The density is the ratio between the mass and the volume of a sample.
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.
932 mL = 0.932 LTo convert from mL to L, divide by 1000.
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That would depend on the mass of the sample, its temperature, and what the sample is made of.
It equals 14641.
1.7-10^24
No. It depends on the number of bacteria present in the initial sample. If the number of bacteria in the initial sample are limited, you may get isolated colonies in the first streak. If the number of bacteria in the sample are high, it may take several streaks before the sample is diluted to the point where isolated colonies are evident.
2 x pi x radius is used to calculate the circumference of the circle, when you know the radius. So, your sample problem should ask about some circle.
0.1mol
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
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.
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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6.3
The number of moles is 2,06.
There is nothing particularly significant about a sample size of 30.