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 ?

Potassium superoxide, KO_(2) , is used in rebreathing gas masks to generate oxygen : " " KO_(2)(s) + H_(2)O(I) to KOH +O_(2)(g) If a reaction vessel contains 0.15 mol KO_(2) and 0.10 mol H_(2)O , how many moles of O_(2) can be produced?

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

Calcium carbonate decomposes on heating according to the following equations: CaCO_(3)(s) Leftrightarrow CaO(s)+CO_(2)(g) How many moles of CO_(2) will be obtained by decomposition of 50g of CaCO_(3) ?

A 10 gram sample of natural gas containing CH_(4) and C_(2)H_(4) was burnt in excess of oxygen to give 29.0 "grams" of CO_(2) and some water. How many games of water are formed :

Propane burns in air according to the following equation : C_3H_8 +5O_2 rarr 3CO_2 + 4H_2O . What volume of propane is consumed on using 1000 cm^3 of air, considering only 20% of air contains oxygen ?

Alkali metals oxide are obtained by combustion of the metals.Although Na normally gives Na_2O_2 ,it will take up further oxygen at elevated pressure and temperature to form NaO_2 .The per and superoxides of the heavier alkalies can also be prepared by passing stoichiometric amounts of oxygen into their solution in liquid ammonia. The different alkali metal oxides can be distinguished by reaction with water.The superoxides reacts with CO_2 and give oxygen gas.The stability of per and superoxides is based upon that larger cation can stablise larger anion, due to larger lattice energy. Alkali metals dissolve in liquid ammonia.Dilute solutions are dark blue in colour but as the concentration increases above 3M, the colour changes to copper bronze and the solution acquires the metallic lusture due to the formation of metal ions clusters.The solutions of alkali metals in liquid ammonia are good conductors of electricity due to the presence of ammoniated cations and ammoniated electrons.However, the conductivity decreases as the concentrations increases, since ammoniated electrons and ammoniated cation associate. KO_2 is used in oxygen cylinders in space and submarines because it :

0.1 moles of Hydrocaron on complete combustion produced 17.6 gms of CO_(2) . How many Carbon atoms are present in each molecule of the hydrocarbon.

A certain drug raises a patient's heart rate, h, in beats per minute, according to the equation h(x)=65+0.2x , where x is the number of milligrams of the drug in the patient's bloodstream. After t hours, the level of the drug in the patient's bloodsteam decrease exponentially according to the equation x(t)=512(0.7)^(t) . After 5 hours, what is the number of beats per minute in the patient's heart rate, correct to the nearest whole number?

How much amount of CaCO_3 in gram having percentage purity 50 per cent produces 0.36 litre of CO_2 at on heating?

How much amount of CaCO_3 in gram having percentage purity 50 per cent produces 0.16 litre of CO_2 at on heating?