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olganol [36]
4 years ago
11

how many molecules, elements, and total atoms are present in the following chemical formula? Mg(NO3)2

Chemistry
1 answer:
Scrat [10]4 years ago
8 0
1 molecule. the coefficient tells you that and since there isn't one then it's 1 molecule.
There is 3 elements. Mg= 1 atom N=2 atoms O=6 atoms. The total number of atoms is 9.

To put it simple
1 molecule
3 elements
9 atoms
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5.) A spring with a spring constant of 500 n/m is stretched 1 meter in
Ymorist [56]

Answer:

250J

Explanation:

Given parameters:

Spring constant  = 500N/m

Extension  = 1m

Unknown:

Elastic potential energy  = ?

Solution:

The elastic potential energy of a body is the energy stored within an elastic string.

  EPE  = \frac{1}{2} k e²

k is the spring constant

e is the extension

 Now;

      EPE  =  \frac{1}{2}  x 500 x 1²   = 250J

4 0
3 years ago
Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene
evablogger [386]

Answer:

0.204.

Explanation:

  • For the following reaction:

<em>CO(g) + Cl₂(g) ⇌ COCl₂(g), </em>

Kp = (P of COCl₂)/(P of CO)(P of Cl₂)

P of COCl₂ = 0.22 atm, P of CO = 0.83 atm, P of Cl₂ = 1.3 atm.

∴ Kp = (P of COCl₂)/(P of CO)(P of Cl₂) = (0.22 atm)/(0.83 atm)(1.3 atm) = 0.204.

8 0
3 years ago
Whats the ratio of KMnO4:KCl =
Natasha2012 [34]
(K+ + MnO4- )+(K+ +Cl- )
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5 0
3 years ago
Elements are solid liquid and gas substance that can be found on earth which statements best describes an element
Mariulka [41]

Answer:

i guess

Explanation:

we will never know

6 0
3 years ago
The volume of a sample of oxygen is 200.0 mL when the pressure is 3.000 atm and the temperature is 37.0 oC. What is the new temp
attashe74 [19]

Answer:

Explanation:

Given:

V1 = 200 ml

T1 = 20 °C

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= 293 K

P1 = 3 atm

P2 = 2 atm

V2 = 400 ml

Using ideal gas equation,

P1 × V1/T1 = P2 × V2/T2

T2 = (2 × 400 × 293)/200 × 3

= 234400/600

= 390.67 K

= 390.67 - 273

= 117.67 °C

7 0
4 years ago
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