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How many moles of ethyl alcohol C2H6O are in a 32.0 g sample Express your answer using three significant figures.?
Wiki User
∙ 6y ago
32 g ethanol is equivalent to 0,695 moles.
Wiki User
∙ 6y ago
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The mass of a sample is 0.001580 g The number of significant figures in this measurement is?
That measurement has 4 significant figures. It could also be stated as 1.580 x 10^-3.
What is the density of mercury if a 25.0 mL sample has a mass of 338.35 g?
(338.5 g) / (25.0 mL) = 13.5 g/mL (3 significant figures)
What is the rule about significant figures?
1. All non-zero numbers are significant 2. Zeros between non-zero digits count 3. Zeros at the beginning of a number do not count 4. Zeros at the end of a number that does not have a decimal are not significant 5. Zeros at the end of a number with a decimal are significant
What equation would you use to express the density of a mineral sample?
density = mass / volume
What would be the most significant type of intermolecular forces in a liquid sample of fluoroform?
Dipole-Dipole
The mass of a sample is 0.001580 g The number of significant figures in this measurement is?
That measurement has 4 significant figures. It could also be stated as 1.580 x 10^-3.
How many significant figures iin he volume of a gas sample recorded as 0.0970?
3 of them.
What is significant figures of a number?
The significant figures are the ones which convey meaningful information about the measurement beyond the magnitude. Saying that a sample weighs .0000039 grams is better stated as 3.9 x 10^-6 grams or perhaps 3.9 micrograms. That's two significant figures. All the zeroes are not significant.
How can you be tested for alcohol?
Testing for alcohol can be performed with an alcohol breath machine, with a sample of blood drawn, with a sample of urine, with a sample of mouth fluid, or with a sample of sweat.
What is the density of mercury if a 25.0 mL sample has a mass of 338.35 g?
(338.5 g) / (25.0 mL) = 13.5 g/mL (3 significant figures)
What is statistically significant about n equals 30 sample size?
There is nothing particularly significant about a sample size of 30.
What is the rule about significant figures?
1. All non-zero numbers are significant 2. Zeros between non-zero digits count 3. Zeros at the beginning of a number do not count 4. Zeros at the end of a number that does not have a decimal are not significant 5. Zeros at the end of a number with a decimal are significant
What is significant and not significant number?
What is significant and insignificant of a numerical statistic is dependent on the sample/population ratio.
What is the density of a sample of ore that has a mass of 57g and occupies What is the density of a sample of ore that has a mass of 57 g and occupies 29 cm3 Answer in units of g cm3?
Density = mass/volume, So, Density = 57g/29cm3 = 2.0g/cm3* The number on the calculator is 1.965517241, which is rounded to 2.0 because of significant figures.
How do they test for alcohol in an autopsy?
Usually through a blood alcohol test based on drawing a sample of blood.
Does alcohol show up in a medical stool sample?
yes
Characteristics of a good sample?
1. the sample should be representative thus carefully selected. 2. the sample should be adequate thus significant enough.
