How many oxygen atoms are in 3.80 g of quartz?

Answer 1

Ans:Quartz is SiO2. It has a formula weight of 60.1 g/mol.

3 grams of SiO2 is 0.05 moles.

Each mole of SiO2 has 0.1 moles of oxygen since there are 2 oxygen atoms per formula unit of SiO2.

(1 mole of anything is 6.02x1023 of anything.)

0.1 mol oxygen atoms x 6.02x1023 oxygen atoms / mol oxygen atoms= 6.02 x 1022 oxygen atoms.

Number of O atoms =6.02×1022

Answer 2

Using SiO2.

3.80 grams SiO2 (1 mole SiO2/60.09 grams)(2 mole O/1 mole SiO2)(6.022 X 1023/1 mole O)

= 7.62 X 1022 atoms of oxygen

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Now, quartz shares oxygen and can be found as SiO4, so all you would do is change the molar mass.

Answer 3

Quartz is SiO2 which is 60.08g/mol. So 3.5g of SiO2 is 3.5g/60.08g/mol = 0.058mol

Oxygen is 16.0g/mol, so (2X16.0g/mol)/(60.08g/mol)X100% = 53.3% of SiO2.

0.058mol X .533 = .031 moles of oxygen. Multiplying that with Avagadro's number:

6.022×1023 mol-1 X .031 moles of oxygen = 1.87×1022 oxygen atoms.

Answer 4

To determine the number of oxygen atoms in 3.80 g of quartz, you first need to calculate the number of moles of quartz using its molar mass. Then, use the chemical formula of quartz (SiO2) to find the mole ratio of oxygen atoms to moles of quartz. Finally, multiply the number of moles of O atoms by Avogadro's number to find the number of oxygen atoms.

Answer 5

3.30 gSiO2 / 60.085g SiO2 x 2 mol 0 / 1 mol SiO2 x (6.022*1023 )

= 6.61*1022 O atoms

Answer 6

28

Answer 7

7.22x10^22

Answer 8

9/13