<h3>
Answer:</h3>
231.31 g
<h3>
Explanation:</h3>
<u>We are given;</u>
- The mass of CuO produced as 3.64 moles
- The equation fro the reaction as
2Cu+O2 → 2CuO
We are required to determine the mass of copper that would react.
- In this case, we are going to use the concept on mole ratio.
- From the balanced equation,
2 moles of Cu reacts with 1 mole of oxygen to yield 2 moles of CuO
- Therefore, the mole ratio of copper (Cu) to CuO is 2: 2 or 1 : 1 (simplified)
- Therefore;
Moles of Cu = moles of CuO
Thus, moles of Cu = 3.64 moles
But, Mass = Number of moles × atomic mass
Atomic mass of copper = 63.546
Thus,
Mass of Cu = 3.64 moles × 63.546 g/mol
= 231.31 g
Thus, 231.31 g of copper will react to produce 3.64 moles of CuO
Because it has weak inter molecular forces between its layers.
The bonds of a glucose molecule store chemical energy
Answer:
The main difference between the two models was about the location of the electron in an atom.
Explanation:
<u>Rutherford described that:</u>
- The electrons were outside of the nucleus.
- They were equal in number to the "positiveness" of the nucleus.
- Also, He randomly placed the negative electrons outside the nucleus.
<u>Bohr improved the Rutherford model:</u>
- Bohr placed the electrons in distinct energy levels.
- Electrons only exist in fixed orbitals (shells) and not anywhere in between.
- Each shell has a fixed energy
- Rutherford explained the nucleus of an atom, while Bohr was more into the electrons and their energy levels.
Answer
Red
Yellow
Blue
Explanation: Decrease in wavelength gives an increase in energy