kathrynway5955
11.03.2020 •
Chemistry
A chemist prepares a solution of calcium sulfate by measuring out of calcium sulfate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's calcium sulfate solution. Round your answer to significant digits.
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Ответ:
The question is incomplete, the complete question is:
A chemist prepares a solution of calcium sulfate (CaSO_4) by measuring out 0.0101 g of calcium sulfate into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium sulfate solution. Round your answer to 3 significant digits.
2.12×10^-4 MolL-1
Explanation:
From m/M= CV
Where
m= mass of substance
M= molar mass of substance
C= concentration of substance
V= volume of solution
Molar mass of CaSO4= 40 + 32 +4 (16)= 136gmol-1
C= m/M ×1/V
C= 0.0101/136 × 1/350/1000
C= 2.12×10^-4 MolL-1
Ответ:
Explanation:
This is because if there is a fire on the building where every object is combustible material then it is not possible to extinguish the fire by only removing the combustible material as you cannot remove the combustible material out of building the only way of doing that is using of carbon dioxide extinguisher or water.
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