Question

) Calculate the mass of 2.5moles of Na2CO3​

Answer 1

Answer:

no. of Mole = 2.5 mol

Molar mass of Na2CO3 = (mass of sodium *2) + (mass of Carbon) + (mass of Oxygen ) *3

= 23*2 + 12 + 16*3

=46+12+48

= 106 g

hence,

Mole =mass/molar mass

2.5 = m / 106

2.5 *106 = m (mass)

= 265.0

= 265 g

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