Answer:
B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2
Explanation:
Hello,
In this case, we should understand oxidizing agents as those substances able to increase the oxidation state of another substance, therefore, in B. reaction we notice that copper oxidation state at the beginning is zero (no bonds are formed) and once it reacts with nitric acid, its oxidation states raises to +2 in copper (II) nitrate, thus, in B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2 nitritc acid is acting as the oxidizing agent.
Moreover, in the other reactions, copper (A.), sodium (C. and D.) remain with the same initial oxidation state, +2 and +1 respectively.
Regards.
Option “A” is the crest of the wave because it’s the maximum value of upward displacement within a cycle.
Answer:10,0000 years
Explanation:
If it takes 2000 years to weather 1cm of limestone
It will take 5*2000 years to weather 5cm of limestone. This gives us 10000 years.
Explanation:
Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons.
Answer:
<u>Nucleus</u> - The central part of the atom containing protons and neutrons.
<u>Electron</u> - A positively charged particle located in the nucleus of an atom.
<u>Proton</u> - A positively charged particle located in the nucleus of an atom.
<u>Electron Cloud</u> - The area of the at surrounding the nucleus where electrons can be found.
<u>Neutron</u> - a negatively charged particle that orbits the nucleus of an atom.
