If a fast-moving car making a loud noise approaches and moves past the person, what will happen as the distance between the two
2 answers:
You might be interested in
Answer:
Choice A: approximately .
Explanation:
Note that the unit of concentration, , typically refers to moles per liter (that is:
.)
On the other hand, the volume of the two solutions in this question are apparently given in , which is the same as
(that is:
.) Convert the unit of volume to liters:
.
.
Calculate the number of moles of formula units in that
of the
solution:
.
Note that (sulfuric acid) is a diprotic acid. When one mole of
completely dissolves in water, two moles of
ions will be released.
On the other hand, (sodium hydroxide) is a monoprotic base. When one mole of
formula units completely dissolve in water, only one mole of
ions will be released.
ions and
ions neutralize each other at a one-to-one ratio. Therefore, when one mole of the diprotic acid
dissolves in water completely, it will take two moles of
to neutralize that two moles of
produced. On the other hand, two moles formula units of the monoprotic base
will be required to produce that two moles of
. Therefore,
and
formula units would neutralize each other at a two-to-one ratio.
.
.
Previous calculations show that of
was produced. Calculate the number of moles of
formula units required to neutralize that
.
Calculate the concentration of a solution that contains exactly
of
formula units:
.
Answer:
The right response is "6 A". A further explanation is given below.
Explanation:
The given values are:
Resistance,
R = 6 ohms
Voltage,
V = 36 volts
As we know,
⇒
then,
⇒
On substituting the values, we get
⇒
⇒