D = m / V
D = 108 / 12
D = 9.0 g/cm³
hope this helps!
The given question is incomplete, the complete question is:
The osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant R. Suppose the osmotic of a certain solution is measured to be 6.6 atm at an absolute temperature of 308. K.Write an equation that will let you calculate the molarity of this solution. Your equation should contain only symbols. Be sure you define each symbol other than R.
Answer:
The correct answer is 0.26 M.
Explanation:
The extra pressure, that is, presented upon the solution to inhibit the process of osmosis is termed as the osmotic pressure. The formula to use for the question is π = CRT.
In the given formula, C is the concentration, π is the osmotic pressure, T is the temperature, and R is the gas constant.
The values or R, T and π given in the question is 0.0821 atmLmol^-1K^-1, 308K and 6.6 atm.
By putting the values in the given equation we get:
6.6 atm = C * 0.0821 atmLmol^-1K^-1 * 308K
6.6 atm/25.3 Lmol^-1atm = C
C = 0.26 M
Hence, the molarity of the solution is 0.26M.
1) The mass of 1 mole of virus is
2) There are 5.6 moles of viruses in an oil tanker
Explanation:
1)
One mole of a substance is the amount of that substance containing a number of particles equal to the Avogadro number:
This means that 1 mole of this virus should contain a number of virus particles equal to .
We know that the mass of 1 virus particle is
Therefore, the mass of 1 moles of viruses is equal to the mass of a single virus particle multiplied by the number of virus particles in one mole, :
2)
In this problem, we have that the mass of the oil tanker is
We also know that the mass of one mole of virus is
Therefore, we can find how many moles of viruses have a mass equal to the mass of the oil tanker by dividing the mass of the oil tanker by the mass of 1 mole of virus particles.
Mathematically, this is done by the following operation:
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The correct answer is a rodent that sleeps underground during day
A desert rodent such as kangaroo rat well adapted to live in dessert. It can survive without drinking water. Rodents make underground burrows at the base of shrub or small bush. It spends most of its day sleeping in the burrow underground to avoid intense heat and comes out to feed at night when temperature falls and desert becomes cooler.
He proved that electrons were composed of positive and negatively charged particles.<span />