Hello!
The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.
We have the following data:
mo (initial mass) = 43 g
m (final mass after time T) = ? (in g)
x (number of periods elapsed) = ?
P (Half-life) = 20 minutes
T (Elapsed time for sample reduction) = 80 minutes
Let's find the number of periods elapsed (x), let us see:
Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:
I Hope this helps, greetings ... DexteR! =)
Answer:
- <u>Ten (10) molecules of water</u><em> are bonded to sodium sulfate decahydrate.</em>
Explanation:
A hydrated compound is one that contains water molecules chemically bonded. So, the correct question is how many waters are <u><em>bonded</em></u> to sodium suilfate?
The latin prefix<em> deca</em> means ten (10), and the word <em>hydrate </em>means that contains water; then, <em>decahydrate</em> is used in chemistry to designate a compound that is bonded to 10 parts (molecules) of water.
Hence, sodium sulfate decahydrate means that each molecule of the compound is bonded to 10 molecules of water.
In the chemical formula, the water molecules of a hydrated compound are shown after the chemical formula of the compound using a period and a coefficient (the number of water molecules bonded) before the water molecules.
Then, given that the chemical formula for sodium sulfate is Na₂SO₄, the chemical formula for sodium sulfate decahydrate is Na₂SO₄·10H₂O.
Quantitative means to count how many of something. The correct answer is B, It has two eyes. Hope this helps
A timer it would track down her rate and speed is the same as a stop watch
No glass is not soluble in normal water, but if the water had acids or other chemicals in it then it would be different.