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Title: Stoichiometry and moles.
Description: A summary of the topic with sample questions.
Description: A summary of the topic with sample questions.
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Stoichiometry:
Defined as the chemistry of elements
...
For the volume calculations the
equation is 1 mol = 22
...
Tip:
Using Avogadro’s constant is quite useful, which is approximately
6
...
That number tells
23
how many atoms/molecules/ions are there in 1 mol of any substance
...
Molar masses are given
in the periodic table already (marked as atomic mass)
...
Atomic mass: No proton (atomic mass) + No neutron
...
1) Converting molar mass to g: Since the atomic number of H is 1, number of moles is 1
...
022*10^23
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Solution: To calculate the whole substance, molar mass of each substance must be calculated
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Step 1) Calculate the molar mass of the whole substance: 2 (2 hydrogens) + 16 (1 oxygen)= 18
Step 2) Divide 16/18 to get the ratio:
8/9
ex) Find the percentage of H by mass in NH3
...
And multiplate it by 100 to find the percentage
...
6 (approximately)
Title: Stoichiometry and moles.
Description: A summary of the topic with sample questions.
Description: A summary of the topic with sample questions.