canonmille2
17.12.2020 •
Chemistry
Please help with chem final need answers within one hour i’ll give brainliest
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Ответ:
1. 7
2. 7
3. 16.60
Explanation:
1. 7
3x-3=18
+3 +3
3x=21
/3 /3
x=7
2. 7
4x-5=23
+5. +5
4x=28
/4. /4
x=7
3. 16.60
it reaches above the halfway point after 16, and it's one above it. So, it's 16.60
Ответ:
The balanced equation is
4Fe(s) + 3O2(g) ---> 2Fe2O3(s)
here four moles of Fe will react with O2 to give 2 moles of Fe2O3
mass of Fe reacted = 33.4 grams
moles of Fe reacted = mass of Fe / atomic mass of Fe
moles of Fe reacted = 33.4 / 55.8 = 0.599 moles
moles of Fe2O3 formed = 0.5 X 0.599 = 0.2995 moles
so mass of Fe2O3 formed = moles X molar mass = 0.2995 X 159.69 = 47.83 g