Question

calculate the mass of 0.72 g molecule of co2

calculate the number of moles of iron in iron sheet containing 1022 atoms of iron..

Answer 1

HEY!!

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▶️44g molecule of CO2 = 6.023 × 1023

▶️1g molecule of CO2  = 6.023 × 1023 /44

▶️0.72g molecule of CO2  = 6.023 × ▶️1023×0.72 /44 

▶️ 0.0985× 1023

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⚫6.022×1023 atoms = 1 mole of iron
⚫1022 atoms of iron = 1/6.022×10^23×10^22 

⚫0.0166 moles