The density of a gas at STP is 0.75 g/L. What is the mass of this gas?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

Consider the following unbalanced equation for the combustion of hexane: αc6h14(g)+βo2(g)→γco2(g)+δh2o(g) part a balance the equation. give your answer as an ordered set of numbers α, β, γ, use the least possible integers for the coefficients. α α , β, γ, δ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback