Given,
The two isotopes of B are 10B and 11B
% abundance of 10B = 19.80
% abundance of 11B = 80.20
Average atomic mass of B
=
=
=
=
= 10.802
Therefore, the average atomic mass of B is 10.802 u
Which describes the activity of an arson investigator? A) identifying the clothing found in a crime scene B) identifying the cau
2 answers:
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Taking into account the definition of density, the mass of a substance with a volume of 150 cm³ and a density of 1.5 is 225 grams.
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
<h3>Mass of the substance in this case</h3>In this case, you know that:
- Density= 1.5
- Volume= 150 cm³
Replacing in the definition of density:
Solving:
mass= 1.5 ×150 cm³
<u><em>mass= 225 g</em></u>
In summary, the mass of a substance with a volume of 150 cm³ and a density of 1.5 is 225 grams.
Learn more about density:
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Answer: Option (d) is the correct answer.
Explanation:
It is given that boiling point of chlorine is 239 K. To convert temperature in degree Celsius, use the formula as follows.
Temperature in Kelvin = Temperature in degree Celsius + 273
or, Temperature in degree Celsius = Temperature in Kelvin - 273
= 239 - 273
=
Thus, we can conclude that when chlorine boils at 239 K then boiling point of chlorine expressed in degrees Celsius is .