how many oxygen atoms are in 1.60g of quartz - SiO2?
how do you figure out atoms to grams and visa versa? the weight of 1 SiO2=60.0848g/mol.
please help
oxygen atoms?
Number= moles O * avagradro number
= 2*1.60/molmassSiO2 * avagradro number.
To determine how many oxygen atoms are in 1.60g of quartz (SiO2), you can follow these steps:
Step 1: Determine the molar mass of SiO2.
The molar mass of SiO2 is calculated by adding the atomic masses of silicon (Si) and two oxygen (O) atoms together.
Molar mass of SiO2 = atomic mass of Si + (2 x atomic mass of O)
Molar mass of SiO2 = 28.0855 g/mol + (2 x 15.9994 g/mol) = 60.0848 g/mol
Step 2: Calculate the number of moles of SiO2.
Using the given mass of 1.60g of SiO2 and the molar mass calculated in Step 1, you can calculate the number of moles.
Number of moles = Given mass / Molar mass
Number of moles = 1.60g / 60.0848 g/mol
Step 3: Determine the number of oxygen atoms.
In one molecule of SiO2, there are two oxygen (O) atoms.
Number of oxygen atoms = Number of moles x Avogadro's number
Number of oxygen atoms = Number of moles x 6.022 x 10^23 atoms/mol
Substitute the value from Step 2 into the equation from Step 3 to find the number of oxygen atoms in 1.60g of SiO2.
To figure out the number of oxygen atoms in 1.60g of quartz (SiO2), we need to follow these steps:
1. Determine the molar mass of SiO2:
- The molar mass of SiO2 is given as 60.0848 g/mol.
2. Calculate the number of moles of SiO2 using the given mass:
- Number of moles = mass of compound / molar mass
- Number of moles of SiO2 = 1.60 g / 60.0848 g/mol
3. Use the chemical formula of SiO2 to find the ratio of oxygen atoms to SiO2:
- The chemical formula of SiO2 indicates that there are 2 oxygen atoms in each SiO2 molecule. So, the ratio is 1 mole of SiO2 : 2 moles of oxygen.
4. Convert the number of moles of oxygen atoms to the number of oxygen atoms:
- Number of oxygen atoms = Number of moles of oxygen * Avogadro's constant
Avogadro's constant = 6.022 x 10^23 mol^-1
Following these steps, we can calculate the number of oxygen atoms in 1.60g of quartz (SiO2):
1. Calculate the number of moles of SiO2:
Number of moles of SiO2 = 1.60 g / 60.0848 g/mol = 0.0266 mol
2. Determine the number of moles of oxygen:
Since the ratio of oxygen atoms to SiO2 is 2 moles of oxygen to 1 mole of SiO2, we have:
Number of moles of oxygen = 2 * 0.0266 mol = 0.0532 mol
3. Convert the moles of oxygen atoms to the number of oxygen atoms:
Number of oxygen atoms = Number of moles of oxygen * Avogadro's constant
Number of oxygen atoms = 0.0532 mol * (6.022 x 10^23 mol^-1) = 3.20 x 10^22 oxygen atoms
Therefore, there are approximately 3.20 x 10^22 oxygen atoms in 1.60g of quartz (SiO2).