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sveticcg [70]
3 years ago
6

Describe how to do a flame test on a sample of a salt

Chemistry
1 answer:
Katen [24]3 years ago
4 0

Answer:Hope this helps!

Explanation:

You can use a flame test to help identify the composition of a sample. The test is used to identify metal ions (and certain other ions) based on the characteristic emission spectrum of the elements. The test is performed by dipping a wire or wooden splint into a sample solution or coating it with the powdered metal salt. The color of a gas flame is observed as the sample is heated. If a wooden splint is used, it's necessary to wave the sample through the flame to avoid setting the wood on fire. The color of the flame is compared against the flame colors known to be associated with the metals.

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Calculating kinetic energy 1200kg car moving at 10​
valkas [14]

Answer:

60000J

Explanation:

Given parameters:

Mass of car  = 1200kg

Speed  = 10m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy is given as:

   Kinetic energy  = \frac{1}{2}  m v²  

Now insert the parameters and solve;

   m is the mass

    v is the velocity  

 Kinetic energy  =  \frac{1}{2} x 1200 x 10²   = 60000J

6 0
3 years ago
Write balanced ionic equations and net ionic equations for the following reactions.
Kipish [7]
The ionic equation will be: 
<span>Mg2+(aq) + 2OH-(aq) + 2H+(aq) + 2NO3-(aq) → Mg2+(aq) + 2NO3-(aq) + 2H2O(l) 
</span>And the net ionic: 
<span>2OH-(aq) + 2H+(aq) → 2H2O(l) 
</span>a Balanced equation would be:
<span>Mg(OH)2(aq) + 2HNO3(aq) → Mg(NO3)2 (aq) + 2H2O(l) 
</span>Now  thsi si so because of the standard equation which is base plus acid=Salt plus water. We need to have in mindo that Mg(OH)2 is sparingly soluble in water and is aqueous mos of the times
7 0
3 years ago
Please help asap!!!!!!!!!!! How many molecules are present in 0.5 moles of NaOH?
laila [671]

Explanation:

oh shi sorry I wish I could help but I'm stupid

5 0
3 years ago
 El vinagre es ácido acético al 5%, a cuantos gramos de ácido acético equivalen 500 g de vinagre?​
Phantasy [73]

Answer:

no equivale a nada porque

El vinagre suele contener ácido acético en una proporción de entre el 4% y 7%. Mucho más que un aderezo, el vinagre puede ser un eficaz y económico ayudante doméstico. Este popular producto, que recibe su nombre del latín vinum acre, es decir "vino agrio", y es básicamente ácido acético diluido.

Explanation:

espero y te sirva

6 0
2 years ago
By which process is a precipitate most easily separated from the liquid in which it is suspended
Gelneren [198K]
<span>Filtration, if its a precipitate that means its insoluble. </span>
7 0
3 years ago
Read 2 more answers
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