Please help need asap so i can pass

Explanation:

83.0g        excess      ? mol

2Na    +    Cl2X    =  2 NaCl

2 mol       1 mol          2 mol

23g/mol

83g  x 1 mol/23g = 3.61 mol Na

3.61 mol Na X 2 mol NaCl/2 Mol Na  =3.6 mol NaCl

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.