1)Calculate the relative molecular mass of :
a)CH3COONH4
b)Al(NO3)3
c)(NH4)2CO3
d)K2Cr2O7
e)NH4NO3
f)C4H10O
g)C6H12O6
h)Fe2(SO4)3
[ATOMIC MASS OF Fe :55amu ; Cr :52 amu]
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Answer:
Nutrients are grouped into macronutrients and micronutrients. Carbohydrates, proteins, fats and water are macronutrients, and vitamins and minerals are micronutrients. Although most foods are mixtures of nutrients, many of them contain a lot of one nutrient and a little of the other nutrients.
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Answer:
a) C2H7O2N
= 12*2+1*7+16*2+14
= 24+7+32+14
= 77 a.m.u
b) AlN3O9
= 26+14*3+16*9
= 212 a.m.u
c) N2H8CO3
= 14*2+1*8+12+16*3
= 28+8+12+48
= 96 a.m.u
d) K2Cr2O7
= 40*2+52*2+16*7
= 296 a.m.u
e) NH4NO3
= 14+1*4+14+16*3
= 80
f) C4H10O
= 12*4+1*10+16
= 48+10+16
= 74 a.m.u
g) C6H12O6
= 12*6+1*12+16*6
= 180 a.m.u
h) Fe2S3O12
= 55*2+32*3+16*12
= 398 a.m.u
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