In cars, ethylene glycol, c2h6o2, is used as a coolant and antifreeze. a mechanic fills a radiator with 7.1 kg of ethylene glycol and 1.2 kg of water.
what is the molar mass of ethylene glycol?
what is the molality of the water in the solution?

Molecular mass of ethylene glycol is 62 g/mol and molality of solution will be 9.39 mol/kg.

Explanation:

Mass of oxygen atom = 16 g/mol

Mass of hydrogen atom = 1 g/mol

Mass of carbon atom = 12 g/mol

Mass of ethylene glycol =

Mathematically,

Water is the solute and ethylene glycol is the solvent in this case.

We are given:

Mass of solute (water) = 1.2 kg = 1200 g      (Conversion factor: 1 kg = 1000 g)

Molar mass of solute (water) = 18 g/mol

Mass of solvent (ethylene glycol) = 7.1 kg

Putting values in above equation, we get:

Hence, molecular mass of ethylene glycol is 62 g/mol and molality of solution will be 9.39 mol/kg.

where's the diagram?

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.