First of all, let us know what is quartz. According to Encyclopedia Britannica (https://www.britannica.com/science/quartz), quartz is a mineral that is mainly composed of Silicon Dioxide (SiO_2) and used in a variety of gemstones. Knowing the Chemical formula of quartz is very important to solve this problem.

You are watching: How many oxygen atoms are in 3.40 g of quartz?

Next, let us examine the chemical composition of quartz. Looking at the chemical formula, we can deduce that the mineral contains 1 atom of Silicon and 2 atoms of Oxygen for every ONE MOLE of Silicon Dioxide. Thus, in order to solve the actual number of u00a0oxygen atoms, we need to convert the given mass to mole using its molar mass. Then, convert moles of Silicon Dioxide to moles of Oxygen using its molar ratio. Finally, convert moles of oxygen to oxygen atoms using the Avogadro's Number (6.022*10^23 atoms/mole).Our solution goes like this:1. Find the molar mass of quartz using the Periodic Table of elementsSilicon u00a0= 28.084 g/molOxygen = 16 g/molSilicon Dioxide = 28.084 + 16(2) = 60.084 g/mol2. Convert 3.40 g of quartz to moles using its molar mass3.40 g Silicon Dioxide* \frac1 mol Silicon Dioxide60.084 g SiliconDioxide u00a0= 0.056587 mol Silicon Dioxide3. Convert 0.056587 mol Silicon Dioxide to moles of oxygen using their molar ratio0.056587 mol SiliconDioxide * \frac2 mol Oxygen1 mol SiliconDioxide = 0.113174 mol Oxygen4. Convert 0.113174 mol oxygen to oxygen atoms using the Avogadro's Number0.113174 mol Oxygen * \frac6.022*10^23atoms Oxygen 1molOxygen = 6.81534*10^22atomsOxygenTherefore, we have 6.81534*10^22 oxygen atoms in 3.40 g of quartz."}>" data-test="answer-box-list">

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First of all, let us know what is quartz. According to Encyclopedia Britannica (https://www.britannica.com/science/quartz), quartz is a mineral that is mainly composed of Silicon Dioxide
(
*
) and used in a variety of gemstones. Knowing the Chemical formula of quartz is very important to solve this problem.

Next, let us examine the chemical composition of quartz. Looking at the chemical formula, we can deduce that the mineral contains 1 atom of Silicon and 2 atoms of Oxygen for every ONE MOLE of Silicon Dioxide. Thus, in order to solve the actual number of oxygen atoms, we need to convert the given mass to mole using its molar mass. Then, convert moles of Silicon Dioxide to moles of Oxygen using its molar ratio. Finally, convert moles of oxygen to oxygen atoms using the Avogadro"s Number (

*
).

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Our solution goes like this:

1. Find the molar mass of quartz using the Periodic Table of elements

Silicon = 28.084 g/mol

Oxygen = 16 g/mol

Silicon Dioxide = 28.084 + 16(2) = 60.084 g/mol

2. Convert 3.40 g of quartz to moles using its molar mass

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3. Convert 0.056587 mol Silicon Dioxide to moles of oxygen using their molar ratio