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
sergejj [24]
3 years ago
10

I need help with Kepler’s law!

Chemistry
1 answer:
strojnjashka [21]3 years ago
7 0
In astronomy, Kepler's laws of planet motion are three scientific laws describing the motion of planets around the Sun, published by Johannes Kepler between 1609 and 1619.
You might be interested in
Given the following data:N2(g) + O2(g)→ 2NO(g), ΔH=+180.7kJ2NO(g) + O2(g)→ 2NO2(g), ΔH=−113.1kJ2N2O(g) → 2N2(g) + O2(g), ΔH=−163
statuscvo [17]

Answer:

ΔH = +155.6 kJ

Explanation:

The Hess' Law states that the enthalpy of the overall reaction is the sum of the enthalpy of the step reactions. To do the addition of the reaction, we first must reorganize them, to disappear with the intermediaries (substances that are not presented in the overall reaction).

If the reaction is inverted, the signal of the enthalpy changes, and if its multiplied by a constant, the enthalpy must be multiplied by the same constant. Thus:

N₂(g) + O₂(g) → 2NO(g) ΔH = +180.7 kJ

2NO(g) + O₂(g) → 2NO₂(g) ΔH = -113.1 kJ

2N₂O(g) → 2N₂(g) + O₂(g) ΔH = -163.2 kJ

The intermediares are N₂ and O₂, thus, reorganizing the reactions:

N₂(g) + O₂(g) → 2NO(g) ΔH = +180.7 kJ

NO₂(g) → NO(g) + (1/2)O₂(g) ΔH = +56.55 kJ (inverted and multiplied by 1/2)

N₂O(g) → N₂(g) + (1/2)O₂(g) ΔH = -81.6 kJ (multiplied by 1/2)

------------------------------------------------------------------------------------

N₂O(g) + NO₂(g) → 3NO(g)

ΔH = +180.7 + 56.55 - 81.6

ΔH = +155.6 kJ

5 0
4 years ago
Plzz write a small pharghraph
sergiy2304 [10]
Mass = reactencts, 73g
4 0
3 years ago
You'll be given 100 points if you answer this question!!!!!!!!!!!!
storchak [24]

Answer:conducts ,steel, polystyrene, thermal insulation

Explanation:

5 0
3 years ago
Please help.
mojhsa [17]

Explanation: An element is represented in the form of _{A}^{Z}\textrm{X} where,

X = Symbol of the element

A = Atomic Mass of the element X

Z = Atomic Number of element X

Hence, For the element Justwondoricium,

Symbol = Jw

Atomic number = 120

Atomic Mass = 224

Now, Atomic number = Number of electrons = Number of Protons

Number of electrons = 120

Number of Protons = 120

and Atomic Mass = Number of neutrons + Number of protons

Number of neutrons can be calculated as we know atomic mass and number of neutrons, Putting the numbers we get

Number of neutrons = 224 - 120 = 104

The nearest noble gas to the element having atomic number 120 is Oganesson (Og), which has an atomic number of 118, so the next two electrons will be filled in the 8s orbital.

Electronic Configuration of Jw is [Og]8s^2

This electronic configuration lets us know about the location of the element in periodic table.

As the electron is entering the 8th shell, it belongs to the 8th period and as the last electron enters the s-orbital, it belongs to the S-block of the periodic table.

When the s-electrons are 1, it belongs to Group 1.

When the s-electrons are 2, it belongs to Group 2.

As this element has 2 s-electrons, it belongs to the Group 2.

8 0
4 years ago
Why do elements in a vertical column of the periodic table have similar chemical properties?
iogann1982 [59]

Answer:they have the same number of electrons in the valence shell

Explanation:

3 0
4 years ago
Other questions:
  • An atom of calcium contains 20 protons how many electrons does it have
    15·1 answer
  • A sample of phosphonitrilic chloride, PNCl2, contains 0.170 mol of the compound. What is the mass of the sample, in grams?
    8·1 answer
  • Help me i do not know this i am very dumb
    6·1 answer
  • Which of the following will produce a 2 molar solution of copper (II) chloride?
    6·1 answer
  • I have 3 questions i'm curious about *SCIENCE*
    14·1 answer
  • But you're so prideful, yeah, prideful
    7·1 answer
  • Kate and Janie are about to pour water into a beaker when they notice
    11·2 answers
  • Why are fingertips wet with saliva before counting money?​
    11·1 answer
  • Which of the following is a stock exchange in the United States?(1 point)
    14·1 answer
  • What are all the ways that you think knowing about the flow of energy might be useful in
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!