The Society of Automotive Engineers has established an accepted numerical scale to measure the viscosity of motor oil. For examp
2 answers:
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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.)
Answer : The mass of sample is, 267.5 grams.
Explanation :
Density : It is defined as the mass of a substance contained per unit volume.
Formula used :
Given:
Volume of Pb =
Density of Pb =
Now put all the given values in the above formula, we get the mass of Pb.
Therefore, the mass of sample is, 267.5 grams.