2C2H6 + 7O2 > 4CO2 + 6H2O

In the combustion of ethane, how many
moles of CO2 can be produced from 3.00
mole of C2H6?

A: 3
B: 4
C: 6
D: 8

Option C) 6

Explanation:

2C2H6(g) + 7O2(g) ---> 4CO2(g) + 6H2O(g)

The equation above shows the combustion of ethane, C2H6 in oxygen, O2 to yield carbon dioxide, CO2 and water, H2O.

The mole ratio on combustion are as follows:

2 mole of C2H6 produce 4 mole of CO2

3 mole of C2H6 produce Z mole of CO2

To get the value of Z, cross multiply

Z x 2 mole = 3 mole x 4 mole

2Z = 12

Divide both sides by 2

2Z/2 = 12/2

Z = 6 moles

Thus, in the combustion of ethane, 6 moles of CO2 can be produced from 3.00 mole of C2H6

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.