A 150 mL of oxygen gas is collected over water at 20 °C and 758 torr. What volume will the same sample of oxygen occupy at STP w
1 answer:
You might be interested in
Explanation:
The given data is as follows.
Volume = 1 L, Concentration of Ca = 5 ppm or 5 mg/L
As 1 mg = 0.001 g so, 5 mg /L will be equal to 0.005 g/l. Molar mass of calcium is 40.078 g/mol.
Hence, calculate molarity of calcium as follows.
Molarity of Ca =
=
Molarity of Ca =
Hence, molarity of is
. Since, volume is same so, moles of calcium chloride will be
.
Thus, we can conclude that mass of will be as follows.
(molar mass of
= 110.984 g/mol)
= 0.0138 g
Thus, we can conclude that mass of is 0.0138 g.