If a 125 gms of radioactive element has a half life of 60 min how many half lives will it go through to become 3.90625 gms

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

The excretory system,need answers for all: )

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?