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White raven [17]
3 years ago
7

Several science students were about to conduct an experiment on electricity. The teacher passed on the science activity which cl

early stated the procedures for the experiment. One student did not understand the instructions. What should the student do now?
A) He could look at what the others are doing.
B) He could ask his friends to explain it to him.
C) He should ask the teacher to explain it to him.
D) He should try to figure out what to do by himself..
Chemistry
1 answer:
olganol [36]3 years ago
8 0
C. You should ALWAYS ask the teacher if you don't get something; your friends could be wrong, don't guess it, and NEVER cheat. Hope this helps!!
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Answer:

Increases by 1

Explanation:

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4. DBearded waste of Co-60 must be stored until it is no longer radioactive. Cobalt-60
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464 g radioisotope was present when the sample was put in storage

<h3>Further explanation</h3>

Given

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26.5 years in storage

Required

Initial sample

Solution

General formulas used in decay:  

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

t = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

Half-life of Co-60 = 5.3 years

Input the value :

\tt 14.5=No.\dfrac{1}{2}^{26.5/5.3}\\\\14.5=No.\dfrac{1}{2}^5\\\\No=\boxed{\bold{464~g}}

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holacomo es tu pregunta nola entiendo

lanation:

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