Achemist prepares a solution of magnesium fluoride (mgf_2), by measuring out 0.031 g of magnesium fluoride into a 250. ml. volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/l of the chemist magnesium fluoride solution. round your answer to 2 significant digits. mol/l.

The concentration of the magnesium fluoride solution is 0.0020 M

Explanation:

Step 1: Data given

Mass of MgF2 = 0.031 grams

volume = 250 mL = 0.250 L

Molar mass of MgF2 = 62.3 g/mol

Step 2: Calculate moles

Moles MgF2 = mass MgF2 / molar mass MgF2

Moles MgF2 = 0.031 grams / 62.3 g/mol

Moles MgF2 = 4.98 *10^-4 moles

Step 3: Calculate concentration of MgF2

Concentration MgF2 = moles MgF2 / volume

Concentration MgF2 = 4.98 *10^-4 / 0.250 L

Concentration = 0.0020 M

The concentration of the magnesium fluoride solution is 0.0020 M

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.