Answer:iodine solution
Explanation: it is because in the presece of starch iodine will turn blue/black
Answer:
A solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 is a good buffer system.
Explanation:
A buffer is defined as the mixture between a weak acid and its conjugate base or vice versa.
For the solutions:
0.10 M HF and 0.10 M LiC2H3O2. HF is a weak acid but LiC2H3O2 is the conjugate base of the weak acid (HC2H3O2, acetic acid).
0.10 M HC2H3O2 and 0.10 M LiC2H3O2. Here, you have a mixture of HC2H3O2, acetic acid, weak acid, and LiC2H3O2 is its conjugate base. Thus, <em>this is a good buffer system</em>
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0.10 M LiOH and 0.10 M KOH. LiOH ans KOH are both strong bases.
0.10 M HF and 0.10 M NH4+. Again, HF is a weak acid but NH4+ is the conjugate acid of a weak base (NH3).
Answer:
the answer is A.
Explanation:
I hope this helps have a fantastic day!
Answer:
This question is incomplete
Explanation:
This question is incomplete.
However, when all the required data are available, you can use the formula/steps below
Average speed/velocity (m/s) = distance (in metres) ÷ time (in seconds)
Time (in secs) = distance ÷ average speed/velocity
Kindly note that "blocks" is not a standard unit for distance measurement in science, hence the distance (since its a walking distance) must be in metres (or converted to metres if not in metres).
The distance in the formula is the distance from the hotel to the ice cream shop while the average speed is the distance covered per time as s/he walks to the ice cream shop and back. Hence, the answer gotten from the formula above will have to be multiplied by 2 (in order to get the time taken to walk to the ice cream shop and back) because the formula will only provide answer to one trip (time taken to walk to the shop).
After the multiplication mentioned above, the time in seconds should be converted to minutes by dividing the answer in seconds by 60
Answer:
8moles
Explanation:
We are given the mass of ammonia to be 136g
Ammonia = NH₃
Let us find the number of moles in ammonia;
Number of moles = 
Molar mass of ammonia = 14 + 3(1) = 17g/mol
so;
Number of moles = 
= 8moles
