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Paul [167]
3 years ago
14

A sample of Ac-255 originally contained 8.0g. After 720 hours, how much of the original Ac-255 remains? The half-life of the iso

tope is 10 days.
I will mark the Brainiest if your answer is correct.
Chemistry
1 answer:
Vesna [10]3 years ago
7 0

Answer:

disculpa solo quiero unos puntos responda para ganar sin embargo quiero subir un poco de mis puntos disculpa bro cuidate

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What is the mass of a titanium alloy that has a heat of fusion of 422.5 joules/gram and requires 2,960 joules of energy to melt
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 The mass  of titanium alloy    is 7.01 g


 <u><em>calculation</em></u>

Q=mHF

where

Q(heat)= 2960 j

M(mass) = ?

Hf( heat  of fusion) = 422.5 j/g

make M the subject of the formula  by  diving both side of equation by Hf

M=Q/Hf

M= 2960 j/422.5 j/g = 7.01 g

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If the valence electrons were removed, what would be the ion charge of the element?
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