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navik [9.2K]
2 years ago
11

The half-life of barium-131 is 12.0 days. How many grams of

Chemistry
1 answer:
dimulka [17.4K]2 years ago
3 0

Let's see

\\ \rm\Rrightarrow A=A_o(0.5)^{\frac{t}{H}}

  • H is half-life

\\ \rm\Rrightarrow A=10(0.5)^{\frac{60}{12}}

\\ \rm\Rrightarrow A=10(0.5)^5

\\ \rm\Rrightarrow A=10(0.03125)

\\ \rm\Rrightarrow A=0.3125g

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3 0
3 years ago
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Copper(II) sulfate forms a bright blue hydrate with the formula CuSO 4 ⋅ n H 2 O ( s ) . If this hydrate is heated to a high eno
Arada [10]

Answer:

The value of n in the hydrate formula is 5 ,CuSO_4.5H_2O.

Explanation:

CuSO_4.nH_2O\rightarrow CuSO_4+nH_2O

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Solving for n, we get:

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Answer:

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