Question

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Answer me please very urgent

Answer 1

4 g of NaOH dissolved in 150 g of water

mass of solute = 4 g
mass of solvent = 150 g

mass of solution = mass of solvent + mass of solute
= 150 + 4
= 154g

mass percent = ( mass of solute / mass of solution ) × 100
= (4/154) × 100
= (1/38.5) × 100
= 2.59

note : solution is a homogenous mixture of two and more then two substance ( solute and solvent )