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galina1969 [7]
3 years ago
13

OP

Chemistry
2 answers:
Yuri [45]3 years ago
8 0

the answer is d hope this helps

bogdanovich [222]3 years ago
4 0

Answer:

The answer is d

Explanation:

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Strontium-90, a radioactive isotope with applications in medicine, has a half-life of approximately 30 years. Out of a 100-gram
AveGali [126]

There are 2 grams remain

<h3>Further explanation</h3>

Given

t1/2 = 30 years

t = 170 years

No = 100 g

Required

Remaining sample

Solution

General formulas used in decay:  

\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}

Input the value :

\tt Nt=100.\dfrac{1}{2}^{170/30}\\\\Nt=1.969\approx 2~grams

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ValentinkaMS [17]

Explanation:

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prisoha [69]

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Explanation:i don’t know

7 0
3 years ago
How many moles are in 82 g of water?
guajiro [1.7K]
Take 82 grams and divide it by the gfm of water which is 18 g/mole...(82g)/(18.0g/mole)=4.555 -> the answer is 4.6 moles
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Help me !!!!!!!!!!! Please
Ivan

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Explanation:

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