This is an easy half-life calculation because it involves an exact integer of half-lives. 1,104 days is precisely 8 half-lives. After each half-life, one half of the original remains.
So, after 8 half-lives you will have 1 / 2^8 of the original material left.
So we start with 30 grams and 1 / 2^8 =
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0.00390625</span></span></span>.
We are therefore left with (30 *
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0.00390625) or </span></span></span>
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0.1171875 grams of the original 30 grams of polonium.
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Answer:
3/2 but if you want mixed form then 1 1/2
<span>4.5 + 0 = 3.5 + 0.7x
1 = 0.7x
x = 1/0.7
x = 1.43 gallons of distilled water
Hope this helps!!</span>