Uhhh pretty sure B
Happy New Years
In magnet I believe nickle is used most often
Use the 1st order decay equation
<span><span>Cfinal</span>=<span>Cinitial</span><span>e<span>−kt</span></span></span>
by filling in and doing the math you will get:
<span> </span><span>Cfinal</span><span> = 1.11 grams Rn-222 after 23 days.
hope this helps
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Answer:
9
option d 9
pH of a 10^-5 M HCI solution is 9
False I think because they don't use balloons to check the weather
