The right answer is
Table A Organic solvent
No Perfume No Fuel No Anesthetic No Adhesive Yes
Relative atomic mass of NaCl=23+35.5=58.5
2000kg / 58.5 = mass per relative atomic mass = 34.188
34.188 * atomic mass of Na, 34.188 * 23 = 786.325... = 790 kg (2s.f.)
Explanation:
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