the assisted suicide of a 104year old australian biologist and scientist, David Goodball, in Switzerland made headlines last 2018. Intravenous injection of pentobarbital was administered on him, which caused his death. pentobarbital has a molecular formula of C11H18N2O3. What its moral mass?
To calculate the mass of the object, we have to use the following formula:
- Density will have units of
when dealing with a liquid or units of
when dealing with a solid.
The mass has units of grams,
The volume will have units of
We are given the density and volume, both of which have good units so all we have to do is rearrange the equation to solve for the mass:
C. Mass number
The mass number is equal to the sum of the number of protons and neutrons where atomic number is just the same as protons since protons determine the atomic number.
How much would 67.2 liters of MgO weigh ?
We have the following data:
m (solute mass) = ? (in grams)
V (volume) = 67.2
MM (Molar Mass of MgO)
Mg = 1*(24.30u) = 24.30 u
O = 1*(16u) = 16 u
MM (Molar Mass of MgO) = 24.30 + 16 = 40.30 g/mol
In STP (Standard Temperature and Pressure), one mole of gas occupies 22.4 liters, so we have the following relation, let us see:
1 mole of MgO ------------- 22.4 L of MgO
n mole of MgO ------------- 67.2 L of MgO
multiply the means by the extremes
Now, applying the data to the formula of the number of moles, we have:
They would weigh 120.9 grams
A material can occupy space by its volume. Volume is one of the determinants for a certain material which occupy space. All matter can occupy space and has mass. No two things can occupy the same space at the same time. Solid particle have a definite volume and shape, liquid particle have definite volume but don't have definite shape, and gas particle don't have definite volume and shape.When you inflate the balloon with gas, the volume of a balloon increases in which gas particle occupy space inside the balloon. Gas particle are spread apart and cannot be seen by our eyes, yet gas particles occupy a space since it has volume.
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