Willsomeone, please check my answers? (<-----) indicates my answer.
1.A student increases the temperature of a 556 cm³ balloon from 278 K to 308 K. Assuming constant pressure, what should the new volume of the balloon be?
320 cm3
501 cm3
1232 cm3
616 cm3<------
2. Which of the following is true about a carbonated soft drink?
The carbon dioxide is the solvent, and water is the solute.
The water is the solvent, and the carbon dioxide is the solute.<----
The water is the solution, and carbon dioxide is the solvent.
The carbon dioxide is the solution, and the water is the solvent.
3. For the reaction CH3COOH CH3COO + H+, which of the following statements is true?
CH3COO is an Arrhenius base.
CH3COO is a conjugate base.<----
CH3COO is a Brønsted-Lowry acid.
CH3COOH is a Brønsted-Lowry base.
4. Which of the following is an exothermic reaction?
dissolving ammonium nitrate in water<---
melting ice
dissolving sugar in water
condensing steam
5. Of the metals Pb, Hg, Na, and Mg, which will not spontaneously donate electrons to copper in solution?
Pb
Hg<---
Na
Mg
6. The diagram is an example of which of the following?
(The element Butane is shown)
aldehyde
alkene
alkyne
alkane<-----
7. In the diagram, which part is negatively charged?
(A voltaic cell is shown)
wire
salt bridge
solid Zn
solid Cu<----
8. Which of the following functional groups defines a carboxylic acid?
COOH<----
=O
PO4
OH
9. Which of the following is a strong base?
ethyl alcohol
vinegar
ammonia
potassium hydroxide<----
10. 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
11. 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.
0.5 M
0.1 M
0.05 M
0.01 M<-----
12. How much heat do you need to raise the temperature of 100 g of aluminum from 30°C to 150°C?
10.8 × 103 kJ
10.8 kJ
10.8 kJ
10.8 × 103 kJ<-----
13. If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 70 days?
0.10 g
0.313 g<----
1.25 g
2.50 g
14. A solution has a hydrogen ion (or hydronium ion) concentration of 3.16 × 109 M. What is the pH of the solution?
8.5
8.0
8.0
8.5<----
15. Which of the following reactions occurs at the anode in a voltaic cell?
Mg (s) Mg2+ + 2e <------
K+ (aq) + e K (s)
Cd2+ (aq) + Zn (s) Zn2+ (aq) + Cd (s)
Cu2+ (aq) + 2e Cu (s)
4 answers
# 7 is incorrect
# 9 is incorrect but if you go to k12 you'll get a B
1 answer