Current location - Health Preservation Learning Network - Slimming men and women - The mass of several elements taken by adults from food every day is 0.8gCa, 0.3gMg, 0.2gCu, 0.0 1gFe, and the proportion of elements in 1 is calculated.
The mass of several elements taken by adults from food every day is 0.8gCa, 0.3gMg, 0.2gCu, 0.0 1gFe, and the proportion of elements in 1 is calculated.
Amount of substance = mass of substance/molar mass. N=m/M, and the value of molar mass is equal to the relative molecular mass of the substance.
N (ca) = 0.8/40 =1/50mol.
N (mg) =0.3/24= 1/80 mol.
N(Cu)=0.2/64= 1/320 mol.
N (Fe) = 0.01/56 =1/5600 mol.
The mass ratio of the four substances:1/50:1/80:1/320:1/5600,