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)
4 answers
H=300*2.44*(20-0)
H=300*2.44*20 = 14640j
H=14.6kj
1 answer