Complete the following, showing all work and using significant figures and formulas in your answer. Remember to balance equations first! (Circle all
answers.)
1. Izzy and Joquin complete the following reaction in the lab. They combine 49.0 g H3PO4
reacts with excess KOH.
H3PO4 + KOH → K3PO4 + H2O
a. What is the theoretical yield (mass) of potassium phosphate in their reaction?
b. What is the percent yield of the product, K3PO4, if they produce 51.3 g K3PO4?

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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.

l dont know l am s sorry