How do the physical properties of rust compare with the physical properties of iron and oxygen?

Rust is brittle, oxidized iron (oxygen reacted with the iron in the metal to produce rust). Meanwhile, iron is a metal and oxygen is a gas under room temperature conditions.

a) IRON = 7.86 g/cm³

b) RUST = 5.242 g/cm³

c) OXYGEN = 0.0014 g/cc

Rust is less dense than Iron but a gram of Iron will yield more than 1 gm of Rust, so we should observe a weight gain, and therefore an increase in density like in the rusted set of Nails.

a) IRON:

M.P = 1535 °C      B.P = 2862 °C

b) RUST:

M.P = 1370 °C       B.P = Decomposition at 3414 °C

c) OXYGEN:

M.P = -218 °C        B.P = -183 °C

a) IRON

Silvery gray

b) RUST

Orange red brown

c) OXYGEN

Colorless

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.