What's the molarity of the solution containing 10 g of NaCN in 250 mL of solution?

0.816

Explanation:

1 mole of NaCN is

Na = 23

C  =  12

N =   14

Total = 49 grams / mole (just add 23 + 12 + 14)

moles when only 10 grams of NaCN are used.

moles = grams/molar mass

grams = 10

molar mass = 49

moles = 10  /  49

moles = 0.204 moles

Volume in Liters

250 mL = 250mL/1000 mL / Liter = 0.25 Liters

Molarity

M = m/V

M = 0.204/0.25 = 0.816

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definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.