P Flag question
The half-life of zinc-71 is 2.4 minutes. If a fresh sample containing 75 grams is left to decay
to products, how much radioactive zinc will be left in 11 minutes?
Select one
64 grams
1600 grams
5.8 grams
3.6 grams

Which compound contain an iron with a 3+ charge

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

How does the motion of particles in a gas change as the gas cools