Sn4+ Sn2+ represents…
a. oxidation
b. reduction
c. hydrolysis
d. none of the above
Identify the reducing agent in this reaction
I- + MnO4- I2 + MnO2
I-
MnO4-
I2
MnO2
To balance the oxygen and hydrogen for a redox reaction that takes place in basic solution, it is necessary to use…
a. H2O and H+
b. H2O only
c. H2O and OH-
d. OH- only
The SI unit of energy is…
a. heat capacity
b. calorie
c. joule
d. enthalpy
If 1 Calorie=4.18 kJ, how many kJ of energy can be released by an apple containing 125 Cal?
a. 0.0334 kJ
b. 29.9 kJ
c. 522 kJ
d. 5.22 x 105 kJ
Given the equation 2Mg(s) + O2 (g) 2MgO (s) + 72.3 kJ, which of the following is true?
a. the reaction is endothermic
b. ☐H=-72.3 kJ
c. ☐H= +72.3 kJ
d. The reaction absorbs heat
If the molar heat of solution of NH2NO3 is 25.7 kJ/mol, how much heat (in kJ) would be required to dissolve 20.0 g of NH4NO3 in water?
a. 103 kJ
b. 514 kJ
c. 0.250 kJ
d. 6.43 kJ
A clean iron nail is dipped into a solution of silver nitrate. Iron is above silver in the activity series of metals. Predict what you will observe.
a. The iron will be reduced
b. Bubbles of nitrogen gas will form on the iron nail
c. The iron nail will become silver-plated
d. No reaction occurs
Answers
Explanation:
1. A
2. Correction the reaction
3. H2O and OH-
4. JOLUE
5. SO for , 125 C
125 × 4.18 == 522.5 C
6. A
7. D
8. D
Answer:
1)Sn4+ ->Sn2+ represents…
b)reduction
2)Identify the reducing agent in this reaction
I- + MnO4- I2 + MnO2
a)I-
3)To balance the oxygen and hydrogen for a redox reaction that takes place in basic solution, it is necessary to use…
c. H2O and OH-
4)The SI unit of energy is…
c. joule
5)If 1 Calorie=4.18 kJ, how many kJ of energy can be released by an apple containing 125 Cal?
c. 522 kJ
6)Given the equation 2Mg(s) + O2 (g) 2MgO (s) + 72.3 kJ, which of the following is true?
a. the reaction is endothermic
7)If the molar heat of solution of NH2NO3 is 25.7 kJ/mol, how much heat (in kJ) would be required to dissolve 20.0 g of NH4NO3 in water?
d. 6.43 kJ
8)A clean iron nail is dipped into a solution of silver nitrate. Iron is above silver in the activity series of metals. Predict what you will observe.
b. Bubbles of nitrogen gas will form on the iron nail