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September 16, 2014

Homework Help: Chemistry(check)

Posted by Anonymous on Friday, June 22, 2012 at 5:29pm.

Please check for me.

1. For the reaction CH3COOH--->CH3COO + H+, which of the following statements is true?

CH3COOH is a Brønsted-Lowry acid.<---

CH3COO is an Arrhenius base.

CH3COO is a Lewis base.

CH3COOH is a Brønsted-Lowry base.





2. Of the metals Pb, Mg, Au, and Na, which will not spontaneously donate electrons to copper in solution?



Pb

Mg

Au<---

Na



3. The pictured compound has which of the following bonds?
Picture of 4 carbons and 10 hydrogens.


C=C and C-H

C-C and C-H <---

C-C, C-H, and C-O

C=C and C-C


4. Which of the following functional groups defines a ketone?

NH

=O<----

PO4

Na



5. Which of the following is a strong base?
potassium hydroxide<----

ethyl alcohol

vinegar

ammonia



6. How many moles of a gas sample are in a 10.0 L container at 373 K and 203 kPa? The gas constant is 8.31 L-kPa/mol-K.

0.33 moles

0.65 moles<----

1.11 moles

3.05 moles



7. You dissolve 0.37 g of potassium chloride (KCl) in 500 mL of water. What is the molarity of the solution? Use a periodic table.
0.01 M<----

0.05 M

0.1 M

0.5 M



8. How much heat do you need to raise the temperature of 300 g of ethanol from 0°C to 20°C?

2.44 kJ<---

7.3 kJ

14.6 kJ

29.5 kJ



9. If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 42 days?

3.13 g

6.25 g

1.25 g<----

2.50 g


10. Which of the following reactions occurs at the anode in a voltaic cell?

K+ (aq) + e- K (s)

Mg (s) Mg2+ + 2e- <----

Cd2+ (aq) + Zn (s) Zn2+ (aq) + Cd (s)

Cu2+ (aq) + 2e- Cu (s)

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