Answer:
Hg²⁺
Explanation:
In the given reaction, Hg²⁺ is the oxidizing agent in the reaction.
An oxidizing agent is any specie that undergoes reduction in the course of a reaction. Such specie;
- shows removal of oxygen
- addition of hydrogen
- gain of electrons
- decrease in oxidation number
The reaction Hg²⁺ + Cu → Cu²⁺ + Hg
here Hg, goes from an oxidation state of 2 to 0. This is a decrease
Answer:
Rutherford's experiment, also known as
supports the existence of neutrons and the nucleus.
Explanation:
In the above diagram, Rutherford was trying to explain his contributions using thin foils of gold and other metals as targets for alpha particles from a radioactive source.
He observed that the majority of particles penetrated the foil either undeflected or with only a slight deflection. But, every now and then an alpha particle was scattered(or deflected) at a large angle..
According to Rutherford, most of the atoms must be empty space. This explains why the majority of alpha particles passed through through the gold foil with little or no deflection. The atoms positive charges, Rutherford proposed are all concentrated in the Nucleus, <em>which</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>dense</em><em> </em><em>central</em><em> </em><em>core</em><em> </em><em>withi</em><em>n</em><em> </em><em>the</em><em> </em><em>atom</em><em>. </em>
Whenever an alpha particle came close to a nucleus in the scattering experiment, it experienced a large repulsive force and therefore a large deflection. Moreover, an alpha particle coming towards a nucleus would be completely repelled and its direction would be reversed. The positively charged particles in the Nucleus are called Protons.
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The balloon will lose volume since Charles law says if temperature decreases then volume decreases and going from 23 degrees to 12 degrees is a temperature decrease.
Most likely the balloon will decrease in volume.
To do this, you need to use the combined gas law
(P1)(V1) / T(1) = (P2) (V2) / 2
For temperature, convert to Kelvins
T1= 20.1C + 273
T1= 293.1 K
T2= 40 +273
T2= 313 K
Now sub the numbers into the formula
(1) (0.78) / 293.1 = (1.2) (V2) / 313
0.00266 = 1.2(V2) / 313
0.833 = 1.2(v2)
V2= 0.69 L is the new volume
Answer:
First oil well in the United States, built in 1859 by Edwin L. Drake, Titusville, Pennsylvania.