Please help with this science assignment
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<em>Chemists use the mole unit to represent 6.022 × 10 23 things, whether the things are atoms of elements or molecules of compounds. This number, called Avogadro's number, is important because this number of atoms or molecules has the same mass in grams as one atom or molecule has in atomic mass units. </em>
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Answer:
Approximately .
Explanation:
Note that both figures in the question come with four significant figures. Therefore, the answer should also be rounded to four significant figures. Intermediate results should have more significant figures than that.
<h3>Formula mass of strontium hydroxide</h3>Look up the relative atomic mass of ,
, and
on a modern periodic table. Keep at least four significant figures in each of these atomic mass data.
:
.
:
.
:
.
Calculate the formula mass of :
.
means that each mole of
formula units have a mass of
.
The question states that there are of
in this solution.
How many moles of formula units would that be?
.
There are of
formula units in this
solution. Convert the unit of volume to liter:
.
The molarity of a solution measures its molar concentration. For this solution:
.
(Rounded to four significant figures.)