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erik [133]
4 years ago
8

Nucleic acids_________?A)are energy-rich.B)are small molecules.C)store information.​

Chemistry
1 answer:
Svetach [21]4 years ago
8 0
I agree the answer is b
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Xco3 enter the group number of x
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We know that C has a formal charge of +4 while each O element has a formal charge of -2, therefore the formal charge of X is:

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X + 2 – 6 = 0

X = 4

<span>So X has a group number of 4.</span>

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avanturin [10]

B. 11,540

<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually radioactive elements have an unstable atomic nucleus.  

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  

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Nt=25 g

No=100 g

t1/2=5770 years

\tt 25=100\dfrac{1}{2}^{T/5770}\\\\\dfrac{1}{4}=\dfrac{1}{2}^{T/5770}\\\\2=T/5770\rightarrowT=11540~years

7 0
3 years ago
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