Answer:

Explanation:
Given that:

From equation (3) , multiplying (-1) with equation (3) and interchanging reactant with the product side; we have:

Multiplying (2) with equation (4) ; we have:

From equation (1) ; multiplying (-1) with equation (1); we have:

From equation (2); multiplying (3) with equation (2); we have:

Now; Adding up equation (5), (6) & (7) ; we get:



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(According to Hess Law)


Answer:
119836.8 km
Explanation:
74 898 miles * 1.6 km / mile = 119836.8 km
Answer:
B
Explanation:
Heating a piece of iron until it glows.
Answer:
Explanation:
diffusion has already occurred