Which of the following would be the most appropriate way to collect a sample of blood? A. Wet blood is allowed to first air dry before a scraping is taken.

B. Dried blood is carefully collected on a cotton swab.

C. Blood is placed in a tightly sealed glass jar in preparation for transport.

D. When found on an object, only the part of the object that contains blood should be collected.

- Sorry about the 'Subject' tab, I know Chemistry isn't the right subject, but they don't have one for Forensics.

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.