Posted by Jeconiah on Wednesday, June 6, 2012 at 10:06pm.
You need to do a better job of posting questions. If the question is to calculate the grams ammonium salt starting with 25 mL of 2.5M H2SO4 the number you have isn't right. If it is 25 mL of 2.5M NH3 the answer is 4.129 which I would round to 4.1g to two significant figures. That's all you show in 0.025 and 2.5.
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