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Vadim26 [7]
4 years ago
9

N₂0₃ what is the oxidation number

Chemistry
1 answer:
larisa86 [58]4 years ago
5 0

Answer/ explanation :

The oxidation number of N2O3

The oxidation number of O = -2

The oxidation number of N = x

Since there are 2 moles of N

And 3 moles of O

Therefore,

2 * x + (-2 * 3) = 0

2x + (-6) = 0

+ * - = -

2x - 6 = 0

Find x, divide both sides by 2

2x = 6

2x / 2= 6/2

2 cancels 2

x = +3

The negative or positive sign is very important, so it must be added.

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A reaction produces 74.10 g Ca(OH)2 after 56.08 g CaO is added to 36.04 g H2O. How should the difference in the masses of reacta
melomori [17]
Cao +  H2O  ---->Ca(OH)2
Calculate   the  number  of  each   reactant  and  the  moles  of  the  product
that  is
moles = mass/molar mass
The  moles  of  CaO=  56.08g/  56.08g/mol(molar  mass  of  Cao)=  1mole
the  moles  of  water=  36.04 g/18  g/mol=  2.002moles
The   moles  of Ca (OH)2=74.10g/74.093g/mol= 1mole

 The  mass  of differences  of  reactant  and  product  can   be  therefore 
 explained  as 
 1  mole   of  Cao  reacted  completely   with   1  mole   H2O  to  produce  1 mole  of  Ca(OH)2. The  mass  of  water   was  in  excess  while  that  of  CaO  was  limited

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3 years ago
Which of the changes of state shown in the model happen when thermal energy is added
AysviL [449]

Answer:

sublimation

Explanation:

immediately into a gas when thermal energy is added to it. The process is called sublimation. Sublimation is the change of state from a solid to a gas without going through the liquid state.

3 0
3 years ago
how many mL of a 3.5 M sodium hydroxide will be needed to neutralize 15mL of a 4.3 M hydrochloric acid solution?
kobusy [5.1K]
Step 1 : write a valanced equation..
NaOH + HCl 》NaCl + H2O

Step 2 : find the number of mole of HCl..
1000 ml ..contains 4.3 mole
15ml... (4.3÷1000)×15 =...

Stem 3 : use mole ratio....
HCl : NaOH
1 : 1
So mole is same as calculated above...

Step 4 :
3.5 mole of NaOH is in 1000ml
(4.3÷1000)×15 mole is in ....


Do the calculation
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B, I would believe. There are 58, but B is the closest we can get.
7 0
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bearhunter [10]

climate

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The following are some of the reasons:

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heat

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<h3>climate:</h3>
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To learn more about the changes in earth visit:

brainly.com/question/13434833?

#SPJ4

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