객관식
Which of the following is the balanced equation for the formation reaction of NaNO3(s) from its elements in their standard states?
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8. Thermochemistry
Formation Equations
객관식
Which of the following represents the formation equation for barium nitrate, Ba(NO3)2?
A
1 Ba2+ (aq) + 2 NO3– (aq) → 1 Ba(NO3)2 (aq)
B
1 Ba(NO3)2 (aq) → 1 Ba (s) + 1 N2 (g) + 3 O2 (g)
C
1 Ba (s) + 1 N2 (g) + 3 O2 (g) → 1 Ba(NO3)2 (aq)
D
1 Ba (s) + 2 N (g) + 6 O (g) → 1 Ba(NO3)2 (aq)
검증된 단계별 안내1
Understand that a formation equation represents the formation of one mole of a compound from its elements in their standard states.
Identify the elements present in barium nitrate, Ba(NO\_3)\_2: barium (Ba), nitrogen (N), and oxygen (O).
Write the reactants as the elements in their standard states: Ba as a solid (s), N as nitrogen gas (N\_2, g), and O as oxygen gas (O\_2, g).
Balance the equation so that the number of atoms of each element on the reactant side equals the number in the product Ba(NO\_3)\_2 (aq).
Express the balanced formation equation as: 1 Ba (s) + 1 N\_2 (g) + 3 O\_2 (g) → 1 Ba(NO\_3)\_2 (aq).
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