There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

Molarity = 15.5 g NaOH (1 mol NaOH / 40 g NaOH) / .250 L solution

Molarity = 1.55 M

5 0

3 years ago

An electrochemical cell has the following standard cell notation.

icang [17]

The cell notation is:

$Mg(s)|Mg^{+2}(aq)||Ag^{+}(aq)|Ag(s)$

here in cell notation the left side represent the anodic half cell where right side represents the cathodic half cell

in anodic half cell : oxidation takes place [loss of electrons]

in cathodic half cell: reduction takes place [gain of electrons]

1) this is a galvanic cell

2) the standard potential of cell will be obtained by subtracting the standard reduction potential of anode from cathode

$E^{0}_{Mg}=-2.38V$

$E^{0}_{Ag}=+0.80V$

Therefore

$E^{0}_{cell}=0.80-(-2.38)=+3.18V$

3) as the value of emf is positive the reaction will be spontaneous as the free energy change of reaction will be negative

Δ $G^{0}=-nFE^{0}$

As reaction is spontaneous and there will be conversion of chemical energy to electrical energy it is a galvanic cell.

7 0

3 years ago

A mass of 2kg has a kinetic energy of 16J.what is the momentum of the body?

juin [17]

Explanation:

mass -2kg

energy -16j

k.e -1/2mv

16j= 1/2×2×V

16× 2/2 =V

16 = V

√16= V

V= 4m/s

Then

momentum=MV

=2×4

=8kgm/s

3 0

3 years ago

If a flask containing one liter of water was poured into 1,000 small cubes, then each cube would contain:

erastova [34]

Every cube would contain 1 milliliter of water, or .01 liter

7 0

3 years ago

Read 2 more answers