4Fe(s) + 3O2(g) → 2Fe2O3(s) ....... ΔH = -1.7 x 10^3 kJ
<span>shows that 1700 kJ of heat is released when 4 moles of Fe react. </span>
<span>Molar mass of Fe = 56 g/mol </span>
<span>Molar mass of Fe2O3 = 160 g/mol. </span>
<span>(a) When 4 mol ( 4 x 56 = 224 g) iron reacted 1700 kJ are released, </span>
<span>when 9.0 g Fe reacted, the amount of energy will be </span>
<span>(9.0 x 1700) / (224) = 68.3 kJ </span>
<span>(b) According to the equation, 1700 kJ of energy released during the formation of 2 moles of Fe2O3 which is 2 x 160 = 320 g of rust. </span>
<span>120 kcal x (4.18 kJ / 1 kcal) = 501.6 kJ </span>
<span>When 1700 kJ released = 320 g rust </span>
<span>when 501.6 kJ released = (501.6 x 320) / 1700 = 94.4 g rust</span>
Answer:
i think it will be warm air rises and takes heat with it eventually it cools and sinks
Explanation:
please mark me as brainliest if it helps
I think its acceleration that is what i choosen on the test
I don't want to go anywhere apart from <u>than</u> Nairobi.
A. instead
B. only
C. besides
<h3>D. than</h3>
_______________________
#Be Brainly
Answer:
Any suspect whose DNA fingerprint matches with that of the victim committed the crime.
Explanation:
Taking a cold blood murder perpetrated by a suspect with a knife as an example. To know the real murderer among 7 suspects, A DNA fingerprint is conducted on the knife used and whoever matches with the DNA fingerprint on the knife committed the crime.