Express the following quantity in scientific notation. The answer needs to have the correct number of significant figures. 21,30
2 answers:
Explanation:
In a scientific notation, numbers are written in decimal and are multiplied by 10 to the respective power.
A scientific notation helps to convert a number into decimal number.
For example, we can convert the number 21,300,000 mL into scientific notation as follows.
Scientific notation of 21,300,000 mL = mL
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Answer :
AgI should precipitate first.
The concentration of when CuI just begins to precipitate is,
Percent of remains is, 0.0076 %
Explanation :
for CuI is
for AgI is
As we know that these two salts would both dissociate in the same way. So, we can say that as the Ksp value of AgI has a smaller than CuI then AgI should precipitate first.
Now we have to calculate the concentration of iodide ion.
The solubility equilibrium reaction will be:
The expression for solubility constant for this reaction will be,
Now we have to calculate the concentration of silver ion.
The solubility equilibrium reaction will be:
The expression for solubility constant for this reaction will be,
Now we have to calculate the percent of remains in solution at this point.
Percent of remains =
Percent of remains = 0.0076 %
Answer:
mass of sulfur = 96 g
Explanation:
no of moles of sulfur dioxide in molecules =
= 2 moles
therefore mass of sulfur dioxide = moles×atomic number
=2×(16+32)
=96