The rule of thumb, which is not exact, is that the reaction doubles for every 10 C rise in temperature. So at 35 it should be 1/2, at 55 should be double, and at 65 should be doubled again (4x)
the lower the temperture the longer it should take correct?
B. 80 seconds
C. 120 seconds
20 is ok
80 is ok
If you double again, that is 160 seconds. Or double x double = 4x and 4 x 40 = 160
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