What does percent composition tell you about a molecule?
O A. It tells you the ratio of elements in the molecular formula.
O B. It tells you how the elements are arranged in the molecule.
O C. It gives you the total number of atoms in the molecule.
D. It tells you how much of a molecule is made up of each element.
It’s B
Answer:
The answer to your question is: A.
Explanation:
A. C + 2H₂ ⇒ CH₄ This is the right answer because the equation is balanced and is according to the law of conservation of matter.
B. 2H₂ + O₂ ⇒ NH₃ This option is wrong because in the reactants there is oxygen and it is not in the products.
C. 2Al₂O₃ ⇒ 2Na₂O This equation is not according to the law of conservation of matter, in the reactants there is aluminum and it is not in the products.
D. N₂ + 3H₂ ⇒ P₄O₁₀ This equation is not according to the law of conservation of matter.
Answer:
P1V1/T1 = P2V2/T2
Explanation:
- Hope that helped! Let me know if you need further explanation. Sorry I didn't give you exaxt one, it was kinda hard to read, but that is the correct answer I put above.
A closed system is completely closed to the outside environment. Every interaction is transmitted inside that closed system.
Answer:
produce characteristic sets of energies, depending on the differences in energy between the excited states and ground state
Explanation:
The electron is jumped into higher level and back into lower level by absorbing and releasing the energy.
The process is called excitation and de-excitation.
Excitation:
When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits. For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy because electron can not stay longer in higher energy level and comes to ground state.
De-excitation:
When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum