The current osha 8 hr limit for hcn in air is 10.0 ppm. a lethal dose of hcn in air is (from the merck index) 300 mg/kg of air at room temperature. how many milligrams of hcn per kilogram of air is 10.0 ppm? what fraction df the lethal dose is 10.0 ppm?

answer; i believe that the correct answer is (c) explore the outer planets; / plz check good luck

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.