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Chemists deserve respect, as the content that they study is not a walk in the park. Among the many things that they are expected to master are chemical elements and compounds. The chemical quiz below tests on this and more.
- 1.The volume of water that must be added in order to dilute 40 mL of 9.0 M HCl to a concentration of 6.0 M is closest to
- A.
10 mL
- B.
20 mL
- C.
30 mL
- D.
40 mL
- E.
60 mL
- 2.
![A chemical supply company sells a concentrated solution of aqueous (molar mass 98 g/mol) that is 50. percent by mass. At 25C, the density of the solution is 1.4 g/mL. What is the molarity of the solution at 25C?]( "A chemical supply company sells a concentrated solution of aqueous (molar mass 98 g/mol) that is 50. percent by mass. At 25C, the density of the solution is 1.4 g/mL. What is the molarity of the solution at 25C?")
A chemical supply company sells a concentrated solution of aqueous (molar mass 98 g/mol) that is 50. percent by mass. At 25C, the density of the solution is 1.4 g/mL. What is the molarity of the solution at 25C?- A.
1.8 M
- B.
3.6 M
- C.
5.1 M
- D.
7.1 M
- 3.
![A 360. mg sample of aspirin, , (molar mass 180 g), is dissolved in enough water to produce 200. mL of solution. What is the molarity of aspirin in a 50. mL sample of this solution?]( "A 360. mg sample of aspirin, , (molar mass 180 g), is dissolved in enough water to produce 200. mL of solution. What is the molarity of aspirin in a 50. mL sample of this solution?")
A 360. mg sample of aspirin, , (molar mass 180 g), is dissolved in enough water to produce 200. mL of solution. What is the molarity of aspirin in a 50. mL sample of this solution?- A.
0.0800 M
- B.
0.0400 M
- C.
0.0200 M
- D.
0.0100 M
- E.
0.00250 M
- 4.
![Appromixately what mass of (250 g/mol) is required to prepare 250 mL of 0.10 M copper (II) sulfate solution?]( "Appromixately what mass of (250 g/mol) is required to prepare 250 mL of 0.10 M copper (II) sulfate solution?")
Appromixately what mass of (250 g/mol) is required to prepare 250 mL of 0.10 M copper (II) sulfate solution?- A.
4.0 g
- B.
6.2 g
- C.
34 g
- D.
85 g
- E.
140 g
- 5.
- A.
Pb to the power of plus 2 end exponent (aq)
- B.
Zn to the power of plus 2 end exponent (aq)
- C.
CrO subscript 4 to the power of minus 2 end exponent (aq)
- D.
SO subscript 4 to the power of minus 2 end exponent (aq)
- E.
OH to the power of minus 1 end exponent (aq)
- 6.
- A.
2 C (s) + O2 (g) --> 2 CO (g)
- B.
S (s) + O2 (g) --> SO2 (g)
- C.
2 F2 (g) + O2 (g) --> 2 OF2 (g)
- D.
2 Na (s) + O2 (g) --> Na2O2 (s)
- E.
2 Mg (s) + O2 (g) --> 2 MgO (s)
- 7.
![If 200. mL of 0.60 M (aq) is added to 400. mL of distilled water, what is the concentration of (aq) in the resulting solution? (Assume volumes are additive.)]( "If 200. mL of 0.60 M (aq) is added to 400. mL of distilled water, what is the concentration of (aq) in the resulting solution? (Assume volumes are additive.)")
If 200. mL of 0.60 M (aq) is added to 400. mL of distilled water, what is the concentration of (aq) in the resulting solution? (Assume volumes are additive.)- A.
0.20 M
- B.
0.30 M
- C.
0.40 M
- D.
0.60 M
- E.
1.20 M
- 8.
![What mass of Au is produced with 0.0500 mol of is reduced completely with excess ?]( "What mass of Au is produced with 0.0500 mol of is reduced completely with excess ?")
What mass of Au is produced with 0.0500 mol of is reduced completely with excess ?- A.
9.85 g
- B.
19.7 g
- C.
24.5 g
- D.
39.4 g
- E.
48.9 g
- 9.Which of the following is a weak acid in aqueous solution?
- A.
HCl
- B.
HClO subscript 4
- C.
HNO subscript 3
- D.
H subscript 2 S
- E.
H subscript 2 SO subscript 4
- 10.
- A.
SnF subscript 2
- B.
SnSO subscript 4
- C.
Sn(SO subscript 4 ) subscript 2
- D.
ZnF
- E.
ZnF subscript 2
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