Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. what is the molar concentration of h3o+ in a cola that has a ph of 2.670

Answer : The hydronium ion concentration in an aqueous solution is,  

Explanation :  Given,

pH = 2.670

pH : It is defined as the negative logarithm of hydronium or hydrogen ion concentration.

Formula used :

Now put the value of pH in this formula, we get:

Therefore, the hydronium ion concentration in an aqueous solution is,  

b i think it’s a water wheel turning in a stream

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.