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
a_sh-v [17]
3 years ago
15

What is an exoplanet? Explain how scientists decide if an exoplanet might be like Earth Then,

Chemistry
1 answer:
netineya [11]3 years ago
6 0

Answer: All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. environment.

Explanation:

You might be interested in
Given these reactions, X ( s ) + 1 2 O 2 ( g ) ⟶ XO ( s ) Δ H = − 668.5 k J / m o l XCO 3 ( s ) ⟶ XO ( s ) + CO 2 ( g ) Δ H = +
qwelly [4]

<u>Answer:</u> The \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

<u>Explanation:</u>

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

X(s)+\frac{1}{2}O_2(g)+CO_2(g)\rightarrow XCO_3(s)      \Delta H^o_{rxn}=?

The intermediate balanced chemical reaction are:

(1) X(s)+\frac{1}{2}O_2(g)\rightarrow XO(s)    \Delta H_1=-668.5kJ

(2) XCO_3(s)\rightarrow XO(s)+CO_2     \Delta H_2=+384.3kJ

The expression for enthalpy of the reaction follows:

\Delta H^o_{rxn}=[1\times \Delta H_1]+[1\times (-\Delta H_2)]

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-668.5))+(1\times (-384.3))=-1052.8kJ

Hence, the \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

7 0
3 years ago
Please help with this
dlinn [17]

Answer:

A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is 0.67 atm.

Step by Step Explanation?

Boyle's law states that in constant temperature the variation volume of gas is inversely proportional to the applied pressure.

The formula is,

P₁ x V₁ = P₂ × V₂

Where,

P₁ is initial pressure = 1 atm

P2 is final pressure = ? (Not Known)

V₁ is initial volume = 10 L

V₂ is final volume = 15 L

Now put the values in the formula,

\begin{gathered}\rm 1\times 10 = P_2\times 15\\\\\rm P_2 = \frac{10}{15\\} \\\\\rm P_2 = 0.67\end{gathered]

Therefore, the answer is 0.67 atm.

5 0
2 years ago
Read 2 more answers
Create an outline to organize your presentation. Write the outline for your presentation in the space provided. You can organize
MrMuchimi
What do u specificity need help with ?
5 0
3 years ago
7 Which physical characteristic of a solution may
Nuetrik [128]

Answer:

2= its color

Explanation:

Transition elements are present in the middle of periodic table. These are d-block elements.

These are 38 elements.

All transition elements have partially filled d orbitals.

They showed color in compound because of d-d transition.

During the d-d transition electron absorbed the energy and emit the reminder energy. The emission is usually in the form of color light.

The color of ion is complementary to the absorbed color.

The transition elements are used as a catalyst in industries such as polymer, petroleum industries.

They are ductile, conduct heat and electricity.

5 0
3 years ago
How can you make a solution saturated
Vlada [557]
You add solute until it can't dissolve anymore.
3 0
3 years ago
Other questions:
  • The organization of hydrogen atoms around the double bond is called _____ when they are on the same side as the double bond, and
    8·1 answer
  • How many moles of carbon dioxide will be produced from the complete combustion of 13.6 moles of butane?
    11·1 answer
  • What is the overall cell potential for this redox reaction?
    5·1 answer
  • Describe two physical and two chemical changes involved in cooking. (4 points)
    15·1 answer
  • Do hot things, like water or magma, always rise?
    12·1 answer
  • An aqueous solution is in equilibrium with a gaseous mixture containing an equal number of moles of helium, carbon dioxide, and
    11·1 answer
  • A scientist is studying a sample of matter. The matter has no definite shape or volume, and it can conduct an electric current.
    12·2 answers
  • How many grams of potassium carbonate are needed to make 300ml of a 4.5M solution?
    5·1 answer
  • My Teacher didn't teach us this please help
    14·1 answer
  • RISD-QSA-SCI-CHEM-Units 7-12 Question: 1-1
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!