Question

формальдегид объемом 40 литров растворили в 200 мл воды. определите мссовую долю вещ-ва в растворе

Answer 1

Растворенное вещество-формальдегид. m(HCHO)=V(HCHO)/Vm*M(HCHO) w(HCHO)=m(HCHO)/m(р-ра)*100% m(р-ра)=m(HCHO)+m(H2O)

Answer 2

Calculation of Mass Fraction

To determine the mass fraction of formaldehyde in the solution, we need to know the mass of formaldehyde and the total mass of the solution.

Given: - Volume of formaldehyde solution: 40 liters - Volume of water: 200 ml

To calculate the mass of formaldehyde, we need to know its density. Unfortunately, the search results did not provide the necessary information to determine the density of formaldehyde. Therefore, we cannot proceed with the calculation at this time.

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