To make a 2.0-mole solution, how many moles of solute must be dissolved in 0.50 liters of solution?

0.25 moles solute

0.50 moles solute

1.0 mole solute

2.0 moles solute

Answer : The correct option is, 1.0 mole

Explanation : Given,

Molarity of solution = 2.0 mole/L

Volume of solution = 0.50 L

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Formula used :

Now put all the given values in the above formula, we get the moles of the solute.

Therefore, the number of moles of solute dissolved in the solution will be, 1.0 mole

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.

i think it is true since you can test the answer and can use observations to complete it.