3. Chemical Reactions

Stoichiometry

Multiple Choice
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.
1628
views
13
rank
2
comments
Open Question
Calculate the amount of Al₂O₃ if 351 grams of al is reacted with excess O₂
1171
views
Multiple Choice
C7H6O3 + C4H6O3 → C9H8O4 + CH3CO2H. How many grams of salicylic acid (C7H6O3) are needed to produce 11.9 g of aspirin (C9H8O4)?
918
views
Multiple Choice
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?
878
views
Multiple Choice
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?
981
views
Multiple Choice
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?
2374
views
Multiple Choice
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?
931
views
Open Question
The number of moles of hydrogen that is needed to produce 0.253 mol of water is
1507
views
Multiple Choice
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)?
990
views
Multiple Choice
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?
960
views
Multiple Choice
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?
113
views
Multiple Choice
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?
79
views
Open Question
Given 6.000 moles of aluminum (Al), how many grams of aluminum oxide (Al₂O₃) will be produced?
1262
views
Multiple Choice
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?
91
views
Multiple Choice
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)
82
views