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Whitepunk [10]
3 years ago
8

What indicates that two objects are in thermal equilibrium?

Chemistry
1 answer:
Leona [35]3 years ago
4 0

Answer:

B

Explanation:

equilibrium happens when two things are in complete balance and thermal is in reference to heat so two things are in thermal equilibrium once they have the same temperature.

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Sheena wants to measure the volume of a ball that is 24 cm across. How should she set up her equation?
Ksivusya [100]

Answer:

The volume of a ball that is 24 cm across is :

d). v = four-thirds pi 12 cubed

Explanation :

Ball is a sphere and volume of sphere is given by :

\frac{4}{3}\Pi r^{3}

r = radius of ball

r =\frac{24}{2}

r = 12 cm

Volume is :

\frac{4}{3}\Pi \times 12^{3}

8 0
4 years ago
Read 2 more answers
Which of these is not a postulate of the kinetic-molecular theory of gases?
marin [14]

a) Gas particles have most of their mass concentrated in the nucleus of the atom.

b) The moving particles undergo perfectly elastic collisions with the walls of the container.

c) The forces of attraction and repulsion between the particles are insignificant.

d) The average kinetic energy of the particles is directly proportional to the absolute temperature.

e) All of the above are postulates of the kinetic molecular theory.

Gas particles have most of their mass concentrated in the nucleus of the atom.

Answer: Option A.

<u>Explanation:</u>

Kinetic Molecular Theory expresses that gas particles are in consistent movement and show flawlessly versatile crashes. Motor Molecular Theory can be utilized to clarify both Charles' and Boyle's Laws. The normal active vitality of an assortment of gas particles is straightforwardly corresponding to total temperature as it were.

The kinetic theory of gases is a significantly critical, however straightforward model of the thermodynamic conduct of gases with which numerous important ideas of thermodynamics were built up.

6 0
4 years ago
If you could drop 12 atoms of copper onto a beaker containing nitric acid, how many molecules of NO would be produced?
Dahasolnce [82]

Answer:

B) 8.0 molecules.

Explanation:

  • From the balanced equation: <em>3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O,</em>

It is clear that 3.0 atoms of Cu react with 8.0 molecules of HNO₃ to produce 3.0 molecules of Cu(NO₃)₂, 2.0 molecules of NO, and 4.0 atoms of H₂O.

<u><em>Note that: </em></u>The no. of atoms and molecules is the same ratio to the no. of moles.

<u><em>Using cross multiplication:</em></u>

3.0 atoms of Cu produce → 2.0 molecules of NO, from the balanced equation.

12.0 atoms of Cu produce → <em>??? molecules of NO.</em>

<em>∴ The no. of molecules of NO produced </em>= (2.0 molecules)(12.0 atoms)/(3.0 atoms) = <em>8.0 molecules.</em>

6 0
3 years ago
WILL GIVE BRAINLIEST
natta225 [31]

Answer:

It is greater than -600kJ/mol and the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.

Explanation:

In an endothermic reaction, the reaction requires a determined amount of energy to occurs.

The reaction of the problem has H = -600kJ/mol. The reaction is endothermic and the energy that the reaction needs is absorbed by the reactants. That means, the energy of products:

Is greater than -600kJ/mol and the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.

7 0
3 years ago
Which groups on the periodic table contain metalloids?
Firlakuza [10]
Groups 13-16, hope this helps!
4 0
4 years ago
Read 2 more answers
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