Question

24) In 116.9 g of NaCl, how many particles (or ‘formula units’) of NaCl are present?
A:

25) What is the empirical formula for a compound that consists of 0.676 g of Iron and 0.773 g of Sulfur?
A:

26) What is the molecular formula for ethylene glycol (antifreeze)? The empirical formula is CH3O and the molar mass is 62.07 g/mol.
A:

Answer 1

Comment in case of any doubt.

not (24 Molar mass of Nace = 58.44 g/mol number of moles of Nace in 116199= 116.9 g = 2 mal 58.44 g/mol Particles for formule units) of Nace= andx 6.022x18 - 17-204x1072 formule units i Avogadro's - of Nace number (25) Moles of Fee in 0.6968 = 0.679g = 0.012 Fe molar mass- 55.845 g/nuel. Moles of sulfur, s= 0.773g . = 0.024 na nolar mass ofs->32.0659)med 3 0.024 Molar ratio of fe is= 0.012 :0.024 = 1:2 so, empirical formula is Fers 1. Thus, answer is (FeS₂ / (26) Number of empirical formula units kas nusles) in 62.07g = 62079 empirical formata molar mass = 62.079 - 31.03481 mal 3.2 so, moleculen & Cafe so, molecular formula is (CHO) or [C2H602] Swer