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nevsk [136]
3 years ago
13

What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?

Chemistry
1 answer:
olga_2 [115]3 years ago
4 0
Answer is 0.7 g

Reason: Given: mass of Fe = 5.60 gWe know that, half life of Fe-53 = t1/2 (Fe-53) = 8.51 min.
Thus, after 25.53 mins, number of half life passed = 25.53/8.51= 3

Now, Amount left after first half life = 5.60g/2 = 2.80 g
Amount left after second half life = 2.80g/2 = 1.40 g
Amount left after third half-life = 1.40g/2 = 0.7g.
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The correct answer for the question that is being presented above is this one: "<span>16.728 g."</span>

Given that 
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7 0
3 years ago
given the following hypothetical reaction 2E(g)+ F(g)+O(g)_products.if the rate law is rate _K(e)^2(f)^-1,what is the order of t
Yuliya22 [10]

Answer:

See explanation.

Explanation:

Hello there!

In this case, considering the given information, it is not possible to figure out such order of reaction with respect to water as it is not involved in the given chemical reaction:

2E(g)+ F(g)+O(g)_

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Regards!

8 0
3 years ago
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AlexFokin [52]
I believe you are referring zero as the exponent. <span>Any number (except 0) with exponent 0 is defined to mean 1.
</span>

For one thing, there is a rule: 

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</span>But (when a is not equal to <span>0),
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Therefore, we must define a^0 as 1.

4 0
4 years ago
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