The actual yield of a product in a reaction was measured as 2.80 g. if the theoretical yield of the product for the reaction is 3.12 g. what is the percentage yield of the product?
0827 %
o
85.2 %
o
87.3 %
o
89.7 %

89.7%

Explanation:

Percentage yield is the ratio of the actual yield of a product to the theoretical yield of a product  expressed as a percentage.

Percentage yield =  x 100

Given,

Actual yield of a product = 2.80 g

Theoretical yield of a product = 3.12 g

Percentage yield =  x 100 = 89.7 %

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.

the product of the pressure and volume is also constant