Question

If 1.2 kilograms of rust form on a bridge in five days, what should be the rate of reaction in grams per hour? (Recall that a bar over the number means that zero is significant.)

100(first zero has bar over it) g/hr
0.05 g/hr
0.010 g/hr
10(zero has bar over it) g/hr

Answer 1

5 days= 5*24hours = 120
1.2kg = 1200 g
1200/120=10 g/hr
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