The number of particles of a solute in a solution is described by its . The ability of a solution to affect the fluid volume in a cell is referred to as its .

The number of particles of a solute in a solution is described by its osmolarity. The ability of a solution to affect the fluid volume in a cell is referred to as its tonicity.

Explanation:

When concentration of a solution is expressed as total number of solute particles in a liter of solvent is called osmolarity.

For example, one mole of a glucose will not dissolve in 1 liter of solution. This means that a solution of 1 mol/L of glucose will have an osmolarity of 1 Osm/L.

The concentration of solute particles relative to that of another solution present on the opposite side of a cell membrane is called tonicity.

Basically, it is the ability of extracellular solution to allow the water move in and out of the cell by osmosis.

Thus, we can conclude that the number of particles of a solute in a solution is described by its osmolarity. The ability of a solution to affect the fluid volume in a cell is referred to as its tonicity.

100c is waters boiling point

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.