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.)

Answer 1

Hi, please consider the answer given below;

If 1.2 kilograms of rust form on a bridge in five days, The the rate of reaction in grams per hour is given as follows;

We can say that 5 days= 5 x 24 hours

This gives = 120  hours

The convert the mass given into grams 1.2kg x 1000 = 1200 g

Then the rate per hour is given as;

1200/120

= 10 g/hr