Calculate the mass of forsterite Mg2SiO4 that contains a million ×1.00106 oxygen atoms. Be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.

5.84x10⁻¹⁷ g

Explanation:

First we convert oxygen atoms into oxygen moles, using Avogadro's number:

1 x 10⁶ atoms ÷ 6.023x10²³ atoms/moles = 1.66x10⁻¹⁸ moles

Now we convert oxygen moles into forsterite moles, using forsterite's molecular formula:

1.66x10⁻¹⁸ O moles * = 4.15x10⁻¹⁹ forsterite moles

Finally we convert forsterite moles into grams using its molecular weight:

4.15x10⁻¹⁹ forsterite moles * 140.69 g/mol = 5.84x10⁻¹⁷ g

The correct answer is c b c a d

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.