How many moles of oxygen are needed in 100g of water

What is true of composite volcanoes?

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?

)in the deacon process for the manufacture of chlorine, hcl and o2 react to form cl2 and h2o. sufficient air (21 mole% o2, 79% n2) is fed to provide 35% excess oxygen, and the fractional conversion of hcl is 85%. calculate the mole fractions of the product stream components.