Answer:IU (international unit): An international unit (IU) is an internationally accepted amount of a substance.
This type of measure is used for the fat-soluble vitamins (such as vitamins AD and E) and certain hormones, enzymes, and biologicals (such as vaccines).
Explanation:
Answer:
and
. The missing ion would be
.
Explanation:
In a double replacement reaction, two ionic compounds exchange their ions to produce two different ionic compounds.
In this question, the two ionic compounds are:
, and
.
In particular,
is made up of
ions and
ions, while
is made up of
ions and
ions.
In a binary ionic compound, cations (positive ions) can only bond to anions (negative ions.)
is a cation. In
,
was bounded
anions. During the reaction, it bonds with
anions to produce
.
is also a cation. In
,
was bounded to
ions. During the reaction, it bonds with
anions to produce
.
Hence, the two products will be
and
.
Note that charges on the ions must balance. For example, a
ion carries twice as much charge as an
ion. As a result, each
ion would bond with twice as many
ions as
would in
.
Color aka the visible light spectrum
Answer:
t = 25.5 min
Explanation:
To know how many minutes does Richard save, you first calculate the time that Richard takes with both velocities v1 = 65mph and v2 = 80mph.

Next, you calculate the difference between both times t1 and t2:

This is the time that Richard saves when he drives with a speed of 80mph. Finally, you convert the result to minutes:

hence, Richard saves 25.5 min (25 min and 30 s) when he drives with a speed of 80mph