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ZanzabumX [31]
3 years ago
8

Lewis dot structure for HNO2

Chemistry
1 answer:
alekssr [168]3 years ago
7 0
I think it's this. It might be in a different shape according to the VSEPR Theory though. I hope this helps!! :)

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PLEASE HELP this is physical science.
Andru [333]

Bone age : 22,920 years

<h3>Further explanation</h3>

Given

Nt = 2.5 g C-14

No = 40 g

half-life = 5730 years

Required

time of decay

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  

Input the value :

\tt 2.5=40.\dfrac{1}{2}^{t/5730}\\\\\dfrac{2.5}{40}=\dfrac{1}{2}^{t/5730}\\\\(\dfrac{1}{2})^4=\dfrac{1}{2}^{t/5730}\\\\4=t/5730\rightarrow t=22920~years

6 0
3 years ago
in the two stage cooling method what is the maximum amount of time allowed for both stages cooling food from 135 to 41 degrees F
BlackZzzverrR [31]
In the past, restaurants had four hours, straight through, to cool food to 41°F or lower. Now the FDA recommends cooling food in two stages -- from 135°F to 70°F in two hours then from 70°F to 41°F or lower in an additional four hours for a total cooling time of six hours
Explanation:
the two-stage cooling method<span> is a </span><span>Food Code </span>counselled<span> procedure for cooling food in restaurants and foodservice </span>institutions<span>. </span>within the<span> two-stage cooling </span>methodology<span>, food is</span><span> cooled from 140° F (60° C) to 70° F (21° C) </span>among 2<span> hours and to 41° F (5° C) or lower </span>among<span> four hours. Use of this cooling </span>methodology<span> ensures that food is cooled quickly and safely and has no harmful effects.</span>
3 0
3 years ago
Read 2 more answers
Quiz. Formula Weight and % Composition
astraxan [27]

Answer:

#1- the percentage is 2.77%

#2 - 218.1336g

#3- 7.89%

#4- 63.8489g

#5- 136.1406g

#6- 340.3515g

#7- 2.387238

#8-  

Explanation:

7 0
3 years ago
Convert 4.0 kilometers 2 meters
Dominik [7]
4 x 1000 so 4 kilometers are equal to 4000 meters
4 0
3 years ago
10 divided by 2 im confused
Eddi Din [679]

if your serious about this question then it is 5

4 0
3 years ago
Read 2 more answers
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