A scientist kept 100 grams of a radioactive material in a container. After 280 days, he observed that 25 grams of the radioactive material was left in the container. Based on the observation, which of these is the most likely inference drawn by the scientist? Question 5 options:

The radioactive material will decay totally in 560 days.

About 50 grams of the material was left in the container after 70 days.

The radioactive material will decay totally in 840 days.

About 50 grams of the material was left in the container after 140 days.
pls hurry

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

unless you remeber everything you always have to have data when recording anything.