Question

Can someone tell me what steps i need to take? So confused on how to solve this

An average human adult takes about 15breaths per min and exhales 23ml of co2 with each breath. If your trapped in a cave with pressure .963atm and 11C and your only source of oxygen is a breathing device containing 1kg of KO2 , how long do you have to live?

4 KO2 + 2 CO2 -> 2 K2CO3 + 3 O2
Nvm, i finally got it :)

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