hayden5928

12.02.2021 • 

Chemistry

Plant cells can use the sugars from photosynthesis to get chemical energy. Cells get chemical energy from food through a series of chemical reactions called cellular respiration. These chemical reactions break down and rearrange food molecules to release chemical energy. Once chemical energy is released, a cell can use it directly for growth and other cell processes that plants need to live. Click the blue words to correct the sentences.

Ответ:

Daseanjones3063

05.01.2021

Chemistry

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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

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