To ensure efficient transesterification of the Jojoba Oil wax esters to methyl ester biodiesel, at least two molar equivalents of sodium methoxide is used. What volume of 1.0M sodium methoxide in methanol solution must be used for efficient transesterification of of 5.0g Jojoba oil

Explanation:

1) The number of moles of jojoba oil wax ester = mass/molar mass = 5.0g/618.07g/mol = 8.09*10^-3 mol

Hence we need at least the number of moles of NaOH required = 2*8.09*10^-3 = 16.18 *10^-3 mol

We have 1.0mol/1000mL solution. Hence volume of 1.0M NaOH solution = (16.18*10^-3)/(1/1000) = 16.18mL

Thus the answer is  16mL.

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assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.