How many grams are in 4.20 mol of sodium chloride (nacl)? express your answer numerically in grams?

Answer : The mass of sodium chloride present in 4.20 mole of NaCl are 245.7 grams.

Explanation : Given,

Moles of sodium chloride (NaCl) = 4.20 mole

Molar mass of sodium chloride (NaCl) = 58.5 g/mole

Formula used :

Now put all the given values in this formula, we get the mass of sodium chloride.

Therefore, the mass of sodium chloride present in 4.20 mole of NaCl are 245.7 grams.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"