To convert from grams to moles, you must divide the given mass by the molecular weight. If this is so, then:
Water ≈ 18.02 grams/mol.
85.0 g/ 18.02 g/mol ≈ 4.72 moles
The answer is that “chlorine has a greater electron affinity
than sodium does”. Sodium has a lesser electron affinity than Chlorine, which
is why it is deliberated that Chlorine is much more suitable to be existent as
an anion than sodium, due to the lack of its electron affinity.
THE ADVANTAGE OF IODIN
- IODINE CAN LEAD TO GOITER AND OTHER THYROID PROBLEMS.
THE DISADVANTAGE OF IODIN
- IODIN MAY LEAD TO THYROIDITIS AND THYROID PAPILLARY CANCER
Explanation:
one mole of any substance there are 6.022×1023 units of that substance. (This number is called Avogadro's number, NA.)
We need to convert the mass of silicon to moles using the molar mass of silicon, 28.06gmol. This number means that one mole of pure silicon would have a mass of 28.06g. Our given mass, however, is in milligrams; to convert this to grams we'll use the conversion factor 1g103mg:
5.86mg Si(1g103mg)=0.00586g Si
Now, using silicon's molar mass, we'll convert this mass to moles of Si:
0.00586g Si(1mol Si28.06g Si)=2.09×10−4mol Si
Finally, let's use Avogadro's number to convert
