Chem Question- Please Help?
1. A 5.000g sample that contained NaCl & CuSO4 · 5H2O was heated. After heating, the sample had a weight of 4.688 g. What is the % NaCl in the sample?
2. What is the % Water in the Following?
(a). Nickel (II) Sulfate Heptahydrate [NiO4S · 7H2O]
(b). Sodium Carbonate Decahydrate [Na2CO3·10H2O]
*The Formula for theoretical % H2O= Mass # of Waters in Formula unit/ Formula mass of compound x 100
3. What type of Chemical reaction takes place when zinc metal is added to a solution of hydrochloric acid?
(a) combination reaction
(b) decomposition reaction
(c) single replacement reaction
(d) double replacement reaction
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1- ?
2. I think 30.0 goes at the top but idk what the formula mass is...
3- Is it a Single replacement reaction?
..........
*Please check what I have and Explain these to me. I would really appreciate the help. Thank you so Much! = )
2007-02-27 13:43:21 · 1 answers · asked by Miss*Curious 5 in Science & Mathematics ➔ Chemistry
Consult ur professor.
2007-02-27 14:11:53 · answer #1 · answered by AVANISH JI 5 · 0⤊ 0⤋