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1. A chemist requires 0.625 mol Na2CO3 for a reaction. How manygrams does this correspond to?
2. A compound with the empirical formula CH2 has a molar mass of 140g/mol. What is the molecular formula for this compound?
A compound with the empirical formula CH2 was found to have a molar mass of approximately 98 g. What is the molecular formula of the compound?
What is the molecular formula of each of the followingcompounds?
(a) empirical formula CH2, molar mass = 84 g/mol
(b) empirical formula NH2Cl, molar mass 51.5g/mol