Why is the average atomic mass used when calculating grams of a substance? O A. The number of isotopes in the sample is constantly changing. B. The average atomic mass is known to more significant figures. O C. The elements in the substance are mixtures of their isotopes. O D. The exact weights of the isotopes are not known.​

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

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

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn