CH-1998
Empirical and molecular formulae
Chemistry · Secondary 4 · Hard · Empirical and molecular formulae
A student dissolves 12.8 g of hydrated sodium carbonate, , in water to make 250 cm³ of solution. Titration shows the concentration of is 0.400 mol/dm³.
What is the relative molecular mass, , of ? ()
What is the relative molecular mass, , of ? ()
- 106
- 128
- 142
- 160
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