How many grams of nacl are dissolved in .500 l of 1.75 m nacl? (molar mass of nacl= 58.44)

Hey there!

Molar mass NaCl = 58.44 g/mol

Number of moles:

n = M * V

n = 1.75 * 0.500

n = 0.875 moles of NaCl

Therefore:

1 mole NaCl 58.44 g

0.875 moles m

m = 0.875 * 58.44 / 1

m = 51.135 g of NaCl

hope this helps!

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.