Answer:
That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge
Answer:
D (Decomposition)
Explanation:
This reaction is a decomposition reaction because one substance (NaNO3) is being separated into two substances (NaNO2 and O2). Alternatively, you could use the process of elimination. The reaction can't be single/double replacement because there's only one reactant, it can't be synthesis because substances are being broken down, not formed, and it can't be combustion because O2 is a product, not a reactant, and CO2 and H2O aren't being produced, as is common with combustion reactions.
Answer:
Rate constant at 725 K is 
Explanation:
According to Arrhenius equation for a reaction-
where 
and 
are rate constants of reaction at 
and 
temperatures (in kelvin) respectively.
is activation energy of reaction.
Here = 600 K , = 
= 725 K, = 262 kJ/mol and R = 8.314 J/(mol.K)
So plugin all the values in the above equation-
So, =
Hence rate constant at 725 K is
<span>Whenever a substance changes its state, the level of intermolecular interactions is changed. As substances transition from solid, to liquid to gas, the intermolecular transactions decrease, meaning that the energy of the molecules is greater in the case of gases than it is for solids. This energy is the reason they are able to overcome intermolecular interactions. Now, when we transition from a high energy state of matter, such as gas, to a state with lower energy, such as a liquid or solid, energy is released. In the cases of boiling, melting and sublimation (conversion of solid to gas), the substance is transitioning to a higher energy state.
Therefore, <u>C. </u><u>condensation</u> releases energy as it is the transition from gas to liquid.</span><span />
