how can i find out how many moles of oxygen are in 9.85g of (NH4)2CO3 ?
i want to know what steps to take and in what order.. please help
To find out how many moles of oxygen are in 9.85g of (NH4)2CO3, you'll need to follow a few steps. Here's the process:
Step 1: Determine the molar mass of (NH4)2CO3
The molar mass is the sum of the atomic masses of all the atoms in a molecule. In this case, (NH4)2CO3 consists of the following elements:
- 2 nitrogen atoms (N) with an atomic mass of 14.01 g/mol
- 8 hydrogen atoms (H) with an atomic mass of 1.01 g/mol
- 1 carbon atom (C) with an atomic mass of 12.01 g/mol
- 3 oxygen atoms (O) with an atomic mass of 16.00 g/mol
Using these values, you can calculate the molar mass of (NH4)2CO3:
(2 × 14.01 g/mol) + (8 × 1.01 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol) = 96.09 g/mol
Step 2: Convert grams to moles
To convert grams of (NH4)2CO3 to moles, use the equation:
Moles = Mass / Molar mass
In this case, the given mass is 9.85 g. Plug in the values to calculate the number of moles of (NH4)2CO3:
Moles = 9.85 g / 96.09 g/mol ≈ 0.1023 mol
Step 3: Determine the mole ratio of oxygen to (NH4)2CO3
From the chemical formula (NH4)2CO3, you can see that there are three oxygen atoms in one molecule of (NH4)2CO3.
Therefore, the mole ratio of oxygen to (NH4)2CO3 is 3:1.
Step 4: Calculate the number of moles of oxygen
To determine the number of moles of oxygen, multiply the number of moles of (NH4)2CO3 by the mole ratio of oxygen to (NH4)2CO3:
Number of moles of oxygen = 0.1023 mol × (3 moles of O / 1 mole of (NH4)2CO3)
Number of moles of oxygen ≈ 0.3069 mol
So, there are approximately 0.3069 moles of oxygen in 9.85g of (NH4)2CO3.
1. Find moles (NH4)2CO3 = g/molar mass
2. There are 3 oxygen atoms in 1 molecule (NH4)2CO3; therefore, multiply #1 by 3.
3. Note: That will be moles of oxygen atoms; moles of oxygen molecules (O2 and not O) will be 1/2 of #2.