How many milliliters of a 8.50 M LiCl solution contain 45.8 g of LiCl?

Express your answer with the appropriate units.

127 mL is the volume for the 45.8 g of LiCl

Explanation:

Molarity of solution: 8.50 M

We know, from this data that 8.50 moles of solute (LiCl), are in 1L of solution

Let's find out the volume for the 45.8 g of LiCl, by a rule of three.

We convert the mass to moles, before: 45.8 g . 1mol / 42.39g = 1.08 moles

Therefore:

8.50 moles of LiCl are found in 1L of solution

Our 1.08 moles will be found in (1.08 mol . 1L) / 8.50 mol = 0.127 L

We can convert the volume from L to mL: 0.127L . 1000 mL/1L = 127mL

The 8.50M LiCl solution contains 127 mL of LiCl

Explanation:

Step 1: Data given

Concentration of the LiCl solution = 8.50 M

Mass of LiCl = 45.8 grams

Molar mass of LiCl = 42.39 g/mol

Step 2: Calculate moles of LiCl

Moles LiCl = mass LiCl / molar mass LiCl

Moles LiCl = 45.8 grams / 42.39 g/mol

Moles LiCl = 1.08 moles

Step 3: Calculate volume of the LiCl solution

Molarity = moles / volume

Volume = moles / molarity

Volume LiCl solution = 1.08 moles / 8.50 M

Volume LiCl solution = 0.127 L

Step 4: Convert volume from L to mL

0.127 L = 0.127 * 10³ mL = 127 mL

The 8.50M LiCl solution contains 127 mL of LiCl

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.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.