315mL of water was added to 2100 mL of 19M NaCl solution. What is the new concentration of the solution? (Use the given information: MW: Na = 23g / mol , CI=35g/mol)
315mL of water was added to 2100 mL of 19M NaCl solution. What is the new concentration of the solution? (Use the given information: MW: Na = 23g / mol , CI=35g/mol)
A. 2.85 M
B. 2.48 M
C. 18.60 M
D. 19.0 M
500g of Al2S3 dissolved in H2O to make 15.0 L of solution. What is its normality?
(MW: Al = 27g / mol S = 32g / mol H=1g/mol, O=16g/mol)
A. 0.11 N
B. 0.07 N
C. 0.22 N
D. 0.04 N
The concentration of a 1500mL aqueous KCI solution was increased from 25.0 M to 80.0 M by evaporation. How much H₂O was removed? (MW: K= 39g/mol, Cl = 35g/mol, H = 1g / mol 0=16g/mol)
A. 1.03 L
B. 0.47 L
C. 1968.75 mL
D. 4.68.75 ml.
Suppose that 15M of NaCl solution with a volume of 15L is heated and loses 2000ml of its water content. What would be the final concentration of your NaCl sample? (MW: Na = 23g / mol , Cl = 35q / mol, H=1g/mol,
O=16g/mol)
A. 3.75 M
B. 0.0375 M
C. 37.5 M
D. 375.0 M
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