Doing a chemistry problem but I need some help on it, it goes...
Elemental calcium is produced by the electrolysis of molten CaCl2.
What mass of calcium can be produced by this process if a current of 5700A
is applied for 42h? Assume that the electrolytic cell is 55% efficient.
For part A, I got 9.8×10^4 g which is correct. I am having trouble with Part B.
What is the minimum voltage needed to cause the electrolysis? (V)
Thanks in advance and please show all steps
.Chemistry5 months ago
How many moles of HF (Ka=6.8×10^−4) must be added to water to form 0.180L of solution with a pH of 2.60? ?
I am stuck on this AP chemistry problem. I tried it myself and got .00167 mol of HF but it said it was wrong. If someone could please help me out.1 AnswerChemistry6 months ago
Stuck on this chemistry homework problem, please help. The options are:
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Stuck on this chemistry question on my homework, the options are:
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Seawater contains 7.8×10−3g Sr2+ per kilogram of water. What is the concentration of Sr2+ measured in ppm?
Hello, need some help with this chemistry problem, please help with showing steps.
Thanks in advance!
Hello, I need some help with this question on my homework, the options are:
The density of the solution is needed to solve the problem.
Thanks in advance!1 AnswerPersonal Finance9 months ago
The question asks to Indicate the concentration of each ion present in the solution formed by mixing and is setup with 44.0mL of 0.150M Na2SO4 and 25.0 mL of 0.200M KCl. It then asks what the Moralities of MNa+, MSO42−, MK+, MCl− are with the correct answer being 0.191, 9.57×10^−2, 7.25×10^−2, 7.25×10^−2, or course in order of how they are asked. I tried 6 different ways but am still stuck on how those are the correct answers, can someone please explains. Thanks!1 AnswerHomework Help9 months ago
44.0mL of 0.150M Na2SO4 and 25.0mL of 0.200M KCl. Enter your answers numerically separated by commas
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A 3.915g sample of a mixture was analyzed for barium ion by adding a small excess of sulfuric acid to an aqueous solution of the sample. The resultant reaction produced a precipitate of barium sulfate, which was collected by filtration, washed, dried, and weighed.
Stumped on this homework question, please help, thanks!
A sample of a hydrocarbon is combusted completely in O2(g) to produce 21.83g of CO2(g), 4.47g of H2O(g) , and 311kJ of heat.
Additionally it asks what the empirical formula of the hydrocarbon?
I've been stuck on this problem, please help, thanks.