Answer:
b Explanation:
i think because i did something like this before
Explanation:
The purpose of this seven-page lab report is to use simple and fractional distillation to purify volatile liquids. The boiling points were obtained from the distillate collected drops and the efficiency of the two methods of purification were compared. The introduction experiment, data, conclusion
Answer:
Explanation:
Hello,
In this case, we can represent the chemical reaction as:
In such a way, since the mass of the obtained silver chloride is 93.9 mg, we can compute the chloride ions in the ground water by using the following stoichiometric procedure whereas the molar mass of chloride ions and silver chloride are 35.45 g/mol and 143.32 g/mol respectively:
Finally, for the given volume of water in liters (0.100L), we compute the required concentration:
Best regards.
Answer:
91hours
Explanation:
Firstly, we calculate the quantity of electricity passed.
Q = It
Q = 34.5t
Since we are dealing with cu2+
Cu2+ + 2e- ———> Cu
From the second law of electrolysis, 1 mole of copper ion will need 2 moles of electrons and thus would be needing half faraday of electricity.
Now one faraday would contain 96500C of electricity, 0.5F would contain = 48,250C of electricity .
The number of moles of copper thus deposited = 34.5t/48,250
We know that the mass of copper deposited equals no of moles of copper multiplied by its atomic mass
15kg = 34.5t/48250 * 64
15,000 * 48250 = 34.5t * 64
t = 327,785s
Converting this to hours means we divide by 3,600
327,785/3600 = 91hours
Answer:
No. of molecules= mass/molar mass ×avogadro no.
= 13.2/50×6.02×10°23
No. of molecules =1.59×10°23
Explanation: