Some older emergency oxygen masks contains potassium superoxide `KO_2` which reacts with `CO_2` and water present in exhaled air to produce oxygen according to the given equation. If a person exhales `0.667 g` of `CO_2` per minute, how many gram of `KO_2` are consumed in `5.0` minutes ?

If 8.5 g of hexane burns completely in oxygen, how many moles of CO_(2) is/are produced?

How many grams of oxygen (O_(2)) gas reacts completely with 1.0g of calcium?

A certain amount of current liberates 0.5 g of H_(2) in 2.0 h. How many gram(s) of oxygen can be liberated by the same current in the same time?

A self-contained breathing apparatus uses potassium superoxide, KO_(2) , to convert the carbon dioxide and water in exhaled air into oxygen, as shown by the equation: 4KO_(2)(s)+2H_(2)O(g)+4CO_(2)(g)to4HCO_(3)(g)+3O_(2)(g) How many molecules of oxygen gas will be produced from 0.0468 g of carbon dioxide that is exhaled in a typical breath?

How many oxygen atoms will be present in 88 g of CO_2 ?

How many molecules of CO_2 are present in one litre of air containing 0.03% by volume of CO_2 at STP ?

How many molecules of CO_(2) are present in one litres of air containing 0.03 % volume of CO_(2) at N.T.P ?