The correct answer is A, B and C
I'd say he ways about 35 kilograms, but I'm probably wrong, xD
Answer:
2H2 + O2 -----> 2H2O
Not sure about the second question though.
Answer:
The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.
Explanation:
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Answer:
Subtract the mass of the CuSO4⋅ 5H2O from the mass of CuSO4 is the right one