Answer:


Explanation:
In this case, we have to start with the <u>reagents</u>:

The compounds given by the problem are:
-) <u>Nitrogen gas</u> = 
-) <u>Water vapor</u> = 
-) <u>Aluminum oxide</u> = 
Now, we can put the products in the <u>reaction</u>:

When we <u>balance</u> the reaction we will obtain:

Now, for the enthalpy change, we have to find the <u>standard enthalpy values</u>:





With this in mind, if we <u>multiply</u> the number of moles (in the balanced reaction) by the standard enthalpy value, we can calculate the energy of the <u>reagents</u>:

And the <u>products</u>:

Finally, for the total enthalpy we have to <u>subtract</u> products by reagents :

I hope it helps!
Explanation:
Atomic mass means the sum of total number of protons and neutrons present in an atom.
When an atom is neutral then number of protons equal the number of electrons.
Mass of a proton equals to 1.007276 u, mass of neutron equals to 1.008664 u.
For example, in a
atom there are total 9 protons and number of neutrons is 19 - 9 = 10.
Since, it is a neutral atom so number of electrons will also be 9.
So, total mass will be calculated as follows.
Total mass = 9 (mass of electron + mass of proton)
= 9 (1.007825 u)
= 9.07043 u
Therefore, we can conclude that total mass of protons and electrons in
is 9.07043 u.
Answer:
Probably D (extensive DNA damage in the eggs...), maybe E (all of the above)
Explanation:
I'm looking for the answer myself becasue I'm not sure, but I'd probably go with D.
Answer:
Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light.
Explanation:
I hope this is right i found it off a website called fluke!
The answer is N2 + 3H2 yields 2NH3. The oxidation-reduction reaction means that there is electrons transfer during the reaction which means that the valence changed.