1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rainbow [258]
3 years ago
15

How many atoms of nitrogen are in the chemical formula Ni(NO3)2?

Chemistry
2 answers:
g100num [7]3 years ago
5 0

Answer:

The correct answer is A.2

Explanation:

The amount of nitrogen atoms in the nickel (II) nitrate molecule / whose formula is Ni (NO3) 2); is 2. The coefficient 2 multiplies by 2 the number of atoms of the Nitrate ion (charge -1), since it is required to balance the charge of nickel 2+.

katen-ka-za [31]3 years ago
4 0

Answer:

2 atoms of nitrogen are present.

You might be interested in
Calculate ∆G ◦ r for the decomposition of mercury(II) oxide 2 HgO(s) → 2 Hg(ℓ) + O2(g) ∆H◦ f −90.83 − − (kJ · mol−1 ) ∆S ◦ m 70.
bagirrra123 [75]

Answer:

4. +117,1 kJ/mol

Explanation:

ΔG of a reaction is:

ΔGr = ΔHr - TΔSr <em>(1)</em>

For the reaction:

2 HgO(s) → 2 Hg(l) + O₂(g)

ΔHr: 2ΔHf Hg(l) + ΔHf O₂(g) - 2ΔHf HgO(s)

As ΔHf of Hg(l) and ΔHf O₂(g) are 0:

ΔHr: - 2ΔHf HgO(s) = <u><em>181,66 kJ/mol</em></u>

<u><em /></u>

In the same way ΔSr is:

ΔSr= 2ΔS° Hg(l) + ΔS° O₂(g) - 2ΔS° HgO(s)

ΔSr= 2* 76,02J/Kmol + 205,14 J/Kmol - 2*70,19 J/Kmol

ΔSr= 216,8 J/Kmol = <em><u>0,216 kJ/Kmol</u></em>

Thus, ΔGr at 298K is:

ΔGr = 181,66 kJ/mol - 298K*0,216kJ/Kmol

ΔGr = +117,3 kJ/mol ≈ <em>4. +117,1 kJ/mol</em>

<em></em>

I hope it helps!

5 0
3 years ago
Please help - will award brainliest! <br> Which type of reaction does this diagram represent?
Brilliant_brown [7]

The correct answer would be B nuclear fission because an atom is splitting into two large fragments of comparable mass

6 0
3 years ago
Read 2 more answers
Help please Chemistry
dybincka [34]

Answer:Cant see the picture cause its too big

Explanation:

7 0
3 years ago
HELP ME WITH THIS LAST QUESTION FROM PAGE 2
spayn [35]

Carbonates

OPTION A is the correct answer

7 0
2 years ago
Read 2 more answers
Pls help it’s due tomorrow morning need you help as soon as possible!! ;) ❤️ Thanks
IrinaVladis [17]

Answer:

I have solved your problem

Explanation:

6 0
3 years ago
Other questions:
  • Write the chemical symbol for three different atoms or atomic cations with 22 electrons
    5·1 answer
  • Which of the following is a transuranium element?<br> Ra<br> Am<br> Tc<br> Pa
    13·1 answer
  • Some molecules that are covalently bonded do not have a difference in charge across the molecule. These molecules are referred t
    15·1 answer
  • A mixture of BaCl2 and NaCl is analyzed by precipitating all the barium as BaSO4. After addition of an excess of Na2SO4 to a 3.9
    9·1 answer
  • What experimental evidence was provided for the nuclear model of an atom
    14·1 answer
  • What is the best describtion of the side of the moon that faces earth?
    11·2 answers
  • The value for Kw is 1.0 x 10-14 at 298K, but this value is temperature dependent. Given what you know about Kw and acid/base che
    15·1 answer
  • Use the Periodic Table to determine the shape of the molecule represented by the following formulas.
    12·1 answer
  • 3. What is the density of a 100 grams (g) box that displaces 20 mL of water?
    7·1 answer
  • What would be the answer
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!