Suppose you have a sample with an OH- concentration of 2.31 × 10-4 M. So, what would be the [H3O+]?
A.1.01 × 10-5 M
B.2.31 × 10-18 M
C.2.31 × 1010 M
D.4.33 × 10-11 M
E.none of the above
Calculate the pH of the following solutions of HNO3. You must show
all work in detail to receive credit: (a) 0.24 M, (b) 0.00087 M, (c) 0.25 M, (d) 0.000001 M.
If you have a giant stockpile of 5.00 M KOH, and you pour out some of it into a 750 mL container, how many moles did you pour out?
A.56.1 mol
B.6.67 mol
C.3.75 mol
D.3.75 x 103 mol
You have been given a 200.00 mL canister containing an unidentified gas. After accounting for the mass of the container, you determine the mass of the actual gas is 0.376 g. The pressure gauge on the cannister reads 874 mmHg, and the temperature gauge reads 298.15 K. What is the identity of the gas? (R= 0.0821 L atm/ mol K)
A.He
B.Ne
C.Ar
D.Kr
E.not enough information
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