3. Chemical Reactions

Stoichiometry

객관식
The combination reaction for the formation of hydrazine is shown below:
4 NH₃ (g) + N₂ (g) → 3 N₂H₄ (l)
Determine the number of moles of hydrazine formed when 25.7 g ammonia reacts with excess nitrogen gas.
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미해결 질문
Calculate the amount of Al₂O₃ if 351 grams of al is reacted with excess O₂
1254
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객관식
C7H6O3 + C4H6O3 → C9H8O4 + CH3CO2H. How many grams of salicylic acid (C7H6O3) are needed to produce 11.9 g of aspirin (C9H8O4)?
1011
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객관식
How many moles of H₂ can be formed if a 2.97 g sample of Mg reacts with excess HCl according to the reaction: Mg + 2HCl → MgCl₂ + H₂?
916
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객관식
When 2.50 mol of Al and 3.00 mol of Cl2 combine in the reaction 2Al(s) + 3Cl2(g) → 2AlCl3(s), how many moles of the excess reactant remain at the end of the reaction?
1047
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객관식
In order to calculate the mass of a product in a chemical reaction from the number of moles of a reactant, which of the following describes all the conversion factors needed?
2523
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객관식
A 10.0 mL solution of 0.121 M H₂SO₄ is neutralized by 17.1 mL of KOH solution. What is the molarity of the KOH solution?
976
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미해결 질문
The number of moles of hydrogen that is needed to produce 0.253 mol of water is
1726
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객관식
What is the balanced chemical equation for the reaction between salicylic acid (C7H6O3) and acetic anhydride (C4H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2)?
1069
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객관식
When 3.00 g of NH3(g) (M = 17.03 g/mol) reacts with 18.0 g of HCl(g) (M = 36.46 g/mol), what is the theoretical yield of NH4Cl(s) in grams?
1009
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객관식
Given the balanced equation for the combustion of octane: 2 C_8H_{18} + 25 O_2 → 16 CO_2 + 18 H_2O, if 100.0 g of C_8H_{18} is mixed with 400.0 g of O_2 and allowed to react completely, how much octane (C_8H_{18}) remains unreacted after the reaction?
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객관식
In a reaction, 0.50 mol of HCl is neutralized by NaOH according to the equation: HCl + NaOH → NaCl + H2O. How many moles of NaOH are required to react completely with the acid?
111
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미해결 질문
Given 6.000 moles of aluminum (Al), how many grams of aluminum oxide (Al₂O₃) will be produced?
1517
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객관식
Given the reaction 4Al + 3O_2 → 2Al_2O_3, how many grams of aluminum (Al) are required to produce 3.5 moles of Al_2O_3 in the presence of excess O_2?
119
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객관식
What mass of fluorine gas (F_2) is needed to react completely with 3.6 grams of water (H_2O) according to the following reaction?2 H_2O(l) + 2 F_2(g) → 4 HF(g) + O_2(g)
109
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