A technician prepares 500mL of a 0.3mol/L NH3 solution
whats the pH of NH3
Posted 8 years ago by spike222 in Chemistry 30 | 1 answers
#chemistry 30 #ph
Aron is training for a 10 km marathon swim in 19 weeks. Each week, his training plan includes a long distance swim. In week six, Aron swam a total of 18.75 km. In week ten, Aron swam a total of 36.25 km. Each week, Aron increased the distance he swam following an arithmetic sequence until the final week. In the last week, Aron only swam 5 km in order to save energy for the race.
a. By what distance did Aron increase his total swimming each week?
b. Determine the distance Aron swam in the first week of training.
c. Determine how far Aron swam in the 18-week training program
Posted 8 years ago by gurleenm in Math 20-1 | 0 answers
#arithmetic sequences
A technician placed a 2.5 mol of NO(g) in an empty 2.0 L flask and allowed the contents to establish the following equilibrium.
4NO(g)?2N2O(g)+O2(g)+197kJ
At equilibrium it was determined that there was 0.58 mol of N2O(g) present.
The percent yield of this reaction is Answer %
The equilibrium concentration of NO(g) is Answer mol/L
Posted 8 years ago by maddy_vang in Chemistry 30 | 0 answers
#chemistry 30
In a closed container, a pure sample of nitrosyl bromide, NOBr(g), undergoes a partial decomposition to produce nitrogen monoxide gas and bromine gas at 19°C as represented by the diagram below.
he equilibrium constant is calculated to be Answer
Posted 8 years ago by maddy_vang in Chemistry 30 | 0 answers
#chemistry 30
CO(g)+Cl2(g)?COCl2(g) Kc=6.6×1011
2NOCl(g)?2NO(g)+Cl2(g) Kc=0.080
PCl5(g)?PCl3(g)+Cl2(g) Kc=4.0×10−2
N2(g)+3H2(g)?2NH3(g) Kc=152
When the above equilibriums are arranged in order of their increasing tendency to proceed toward completion, the order is
Posted 8 years ago by maddy_vang in Chemistry 30 | 0 answers
#chemistry 30
A technician placed a 2.5 mol of NO(g) in an empty 2.0 L flask and allowed the contents to establish the following equilibrium.
4NO(g)?2N2O(g)+O2(g)+197kJ
At equilibrium it was determined that there was 0.58 mol of N2O(g) present.
The percent yield of this reaction is Answer
Posted 8 years ago by maddy_vang in Chemistry 30 | 0 answers
#chemistry 30
Consider the following buffer equilibrium.
HCOOH(aq)+H2O(l)?HCOO−(aq)+H3O+(aq)
When a small quantity of NaOH(aq) is added to the above buffer mixture the equilibrium will shift (left/right/no change) and the pH of the equilibrium system will (increase/decrease)
Posted 8 years ago by maddy_vang in Chemistry 30 | 0 answers
#chemistry 30
A technician combined 25 mL of 1.0 mol/L HF(aq) with 25 mL of 1.0 mol/L NaF(aq). The following buffer equilibrium was established.
HF(aq)+H2O(l)?H3O+(aq)+F−(aq)
What would limit the buffering action if a sample of a strong acid was added?
Posted 8 years ago by maddy_vang in Chemistry 30 | 1 answers
#chemistry 30
Pairs of solutions
1.0 mol/L HNO3(aq) and 1.0 mol/L LiOH(aq)
1.0 mol/L HBr(aq) and 1.0 mol/L LiBr(aq)
1.0 mol/L HNO2(aq) and 0.10 mol/L LiNO2(aq)
1.0 mol/L HCO3-(aq) and 1.0 mol/L CO32-(aq)
If each of the pairs of solutions listed above is mixed together in equal volumes, then the pair of solutions that could act as a buffer is numbered
Posted 8 years ago by maddy_vang in Chemistry 30 | 1 answers
#chemistry 30