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Oksanka [162]
3 years ago
15

How many valence electrons should you use to draw a Lewis structure of ammonia (NH3)?

Chemistry
2 answers:
stealth61 [152]3 years ago
7 0
You should use 8 valence electrons to draw a Lewis structure of ammonia. b) 8
Mekhanik [1.2K]3 years ago
4 0
Hello there,


Your correct answer would be 8.<span> There are </span>8 valence electrons<span> available for the Lewis structure for NH</span>3<span>.

Hope this helps

~Hottwizzlers</span>
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In this double replacement reaction, which are the products? hcl + naoh —&gt; ______?
Anarel [89]
The answer is:  " NaCl + H₂O " ; (or; write as:  " H₂O + NaCl " ) .
________________________________________________________
Specifically:
_________________________________________________________

    HCl + NaOH  —>  NaCl + H₂O  ;   or; write as:

    NaOH + HCl   —>  H₂O + NaCl  .
_______________________________________________________
            This type of "double-replacement" reaction is called "neutralization".
 
             Since we are adding a strong acid to a strong base (reactants), we know that the product will be:  1) a salt ; and 2) water.  Since we know one of the reactants will be "water" (H₂O) ; we can find the base (i.e. , the "remaining product") from selecting the "unused elements" to form the corresponding "salt".
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3 0
3 years ago
Read 2 more answers
Answer this question fast please!
MrRissso [65]

Answer:

A is a physical change, no atoms are being lost its still in it original form

B is a chemical change, it is losing atoms and changing into a new substance

Explanation:

5 0
3 years ago
A neutral atom has two, eight, eight electrons in its first, second, and third energy levels. this information ________. does no
olga55 [171]
This info tells us if it stable or not and it tells us how many electrons it need to be stable.
4 0
3 years ago
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Halp!
Nadya [2.5K]

Answer:

One with mass 0.52kg will have higher acceleration.

Explanation:

We know that

F = m x a

As we can see, for a constant value of F , for a body having more mass will have less acceleration and a body having less mass will have more acceleration ( Inversely proportional when force applied is constant).

Therefore lesser mass body will have more acceleration.

Hence, <em>0.52 kg body will have more acceleration. </em>

Verification :

F = ma

For 0.52kg:

a= F / m = 26 / 0.52 = 50 m/s²

For 0.78kg:

a= F/m = 26 / 0.78 = 33.3 m/s²

5 0
3 years ago
Lead-209, a radioactive isotope, decays to nonradioactive lead over time. the half-life of lead-209 is 8 days. suppose that 20 m
ahrayia [7]
Radioactive elements undergoes first order decay. 

Now, for 1st order decay kinetics, rate constant (k) can be estimated as follows

k = 0.639/ t1/2,
where t 1/2 = half-life of radioactive material = 8 days (For Pb-209)

Also, we know that
t = \frac{2.303}{k}log \frac{Co}{Ct}  .................(1)

Here, Co = initial conc. of radioactive element
Ct = conc. of radioactive element at time t
t = time required to reach the concentration Ct


Thus, <span>equation 1 can be used to estimate the amount of lead-209 present after 't' days.</span>

4 0
3 years ago
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