Does it show the answer choices ?
We have this
<span>C M = n / V => n = C M . V = 0,25 . 0,4 = 0,1 mole </span>
<span>m Na2CO3 = n . M = 0,1 . 106 = 10,6 g</span>
A. Condensation
when warm air hits the cold<span> surface it reaches its dew point and condenses</span>