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PSYCHO15rus [73]
3 years ago
13

QUESTION 5 How can you increase the kinetic energy of the particles in a substance?

Chemistry
2 answers:
FromTheMoon [43]3 years ago
8 0

Answer: A rise in temperature increases the kinetic energy and speed of particles; it does not weaken the forces between them. The particles in solids vibrate about fixed positions; even at very low temperatures. Individual particles in liquids and gases have no fixed positions and move chaotically.

Sav [38]3 years ago
7 0

Answer:

energy kinetic particles in substance

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Write a balanced half-reaction describing the reduction of aqueous vanadium(V) cations to aqueous vanadium(I) cations.
11Alexandr11 [23.1K]

Explanation:

Reduction is a chemical reaction in which electrons are gained by one of the atoms taking part in the reaction and lowering of an oxidation state of that atom.

Reduction takes place at the cathode.

In aqueous, vanadium(V) is present in +5 oxidation state which on reduction changes to vanadium(I) with +1 oxidation state.

The half reaction is :

V^{5+}(aq)+4e^- \rightarrow V^{1+}(aq)


5 0
3 years ago
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A mineral a. has a chemical formula. c. has a characteristic internal structure. b. occurs naturally. d. All of the above.
WARRIOR [948]
The answer is D.
I hope this helps!
6 0
3 years ago
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In one experiment a student accidentally injected a syringe filled with 10 mL of 12 M H2SO4 into the pressure vessel. The metal
Volgvan
Yes i think it’s the correct answer !
4 0
3 years ago
2. When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be dra
loris [4]

Answer:

option B is correct :  The beam was positively charged.

Explanation:

In 19th century J.J Thomson conducted an experiment on cathode ray tube. These cathode ray tubes were sealed glass tubes inside which the pressure of the gas reduced by evacuating air. Then he applied a high voltage across two electrodes at end of the tube, that voltage caused a beam of particles to flow from the cathode to the anode.

Beam of the particles were originated at the cathode and detected on anode by a phosphorous beyond the anode. As at that time phosphorous sparks and emit light.

To test properties of particles he places two opposite charged electric plates around the cathode rays that is one negative and one positive plate.

Thomson observed that these rays deflected to positive electric plate so it indicated that these rays are composed of negatively charged particles as it was attracted by the positive charged electric plate. These particles later named as electrons.

So,

option B is correct :  The beam was positively charged.

8 0
3 years ago
In the reaction, 2 Al (s) + 6HCL (aq) --> 2ALCL3 (aq) + 3 H2 (g), 2.00 g of Al will react with how many milliliters of 0.500
san4es73 [151]

Answer:

The volume of HCl required is V = 420 mL

Explanation:

From the question we are told that

    The chemical equation for this reaction is

             2 Al _{(s)} + 6 HCl _{(aq)} -----> 2 Al Cl_{3} _{(aq)} + 3 H_2 _{(g)}

    The mass of Al  is m__{Al}} = 2.00g

    The concentration of HCl is C__{HCl}} = 0.500M

The number of moles of Al given is n__{Al}} = \frac{mass \ of  Al}{Molar \ mass \ of \ Al}

   The molar mass of Al is  M = 27 g/mol

       So

               n__{Al} = \frac{2}{27}

               n__{Al} =  \ 0.07 \ moles

From the balanced equation

           2 moles of  Al  reacts  with  6 moles of  HCl

So        0.07 moles of Al will react with x

  Therefore

                x = \frac{0.07 *6}{2}

                x = 0.21 \ moles

Now the volume of HCl can be obtained as

           Volume(V) = \frac{moles}{concentration }

 So       V = \frac{0.21}{0.500}

             V = 420 mL

8 0
2 years ago
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