Recent questions in Engineering Chemistry

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Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compounds gives the following percent composition by mass: C:44.4 %, H:6.21 %, S:39.5%, O:9.86 %. Calculate its emprical formula. What is its molecular formula given that its molar mass is about 162 g?

Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compounds gives the following percent composition by mass: C:44.4 %, H:6.21 %, S:39.5%, O:9.86 %. Calculate its emprical formula. What is its molecular formula given that its molar mass is about 162 g? (10 points)
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Urea [(NH2)2CO] is used for fertilizer and many other things. Calculate the number of N,C,H and O atoms in 1.68x104 g urea. (check the mass number from periodic table for each element) ?

How do it ? Urea [(NH2)2CO] is used for fertilizer and many other things. Calculate the number of N,C,H and O atoms in 1.68x104 g urea. (check the mass number from periodic table for each element) (5 points)
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. The atomic masses of 36Li and 37Li are 6.0151 u and 7.0160 u, respectively. (u= SI symbol of atomic mass unit). Calculate the natural abundances of these two isotopes. The avarage atomic mass of Li is 6.941 u

. The atomic masses of 36Li and 37Li are 6.0151 u and 7.0160 u, respectively. (u= SI symbol of atomic mass unit). Calculate the natural abundances of these two isotopes. The avarage atomic mass of Li is 6.941 u
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