Strontium-90 is a dangerous substance that is released in nuclear weapon fallout. However, under controlled conditions, it can be used to treat bone cancer, and it can also be used as a radioactive tracer in medical and agricultural studies. If a scientist has 10 g of
strontium-90, how many grams will remain after 3 half-lives?
OA. 11.25 grams
OB. 10 grams
OC. 5 grams
OD 1.25 grams

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Answer from each drop-down menu. e characteristics of a borane molecule (bh). the lewis structure and table of electronegativities are given olecular shape is and the molecule is reset next erved. search e a