Be sure to use the correct number of significant figures for the volumes and temperatu record below! determination of ? 11 for the reaction ha(aq) + nhfaq-nilo(ag) before mixing volume of 2.00 m nhs temperature of 2.00 m nh volume of 2.00 m hci temperature of 2.00 m hci average temperature (tinitial for solution a. 2 3oc 50 6 ml 22. 4oc 22.1°c temperature of mixture (tfinal for solution) temperature ofcalorimeter (tfinal for calorimeter) determination of ? ? for the process nh, ci(s) nh, cl(aq) before mixing volume of h20 mass of nh ci(s) temperature of water (tinitial for solution) temperature of calorimeter (tinitial for calorimeter) after mixing temperature of mixture (tinal for solution) s0.0 ml 4.0 22 ? 22 oc temperature ofcalorimeter (tfinal for calorimeter)

the "old masters" understood that humans often allow suffering to go unheeded or ignored.

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.