Answer:
d. at 25.0 and 1 atm
Explanation:
The standard heat of formation of a substance is the amount of heat absorbed or evolved when 1 mole of the substance is formed from from its constituent elements. It is also known as standard enthalpy of formation.
All elements in their natural states, have a standard heat of formation of zero because there is no temperature change involved in their formation. Example includes oxygen gas, graphite (solid carbon).
a. ΔH° of at standard pressure of 1 atm is zero, but not at 2 atm
b. ΔH° of Fe at 25.0 is zero, but not at 1200
c. ΔH° of is not zero because it's a compound
d. ΔH° of is zero at standard conditions
Answer:
Explanation:
We have to start with the reaction:
<u>We have 2 carbons, 6 hydrogens and 38 oxygens on both sides</u>.
Now the <u>molar ratio</u> between and is 2:12 or . With this in mind we can calculate the moles of , so:
I hope it helps!
It is more likely for an object to have 0 mass
I don't know but I'm wasting 5 seconds of your time you can't take back sorry
Answer:
the sum of the mass numbers and the sum of the atomic numbers balance on either side of an equation
Explanation:
hope this helps