What is the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3)?
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To calculate the percentage by mass of sodium (Na) in sodium hydrogen carbonate (NaHCO3), we need to determine the molar mass of sodium and the molar mass of the entire formula unit.
1. Molar mass of sodium (Na):
The atomic mass of sodium (Na) is 22.99 g/mol.
2. Molar mass of sodium hydrogen carbonate (NaHCO3):
NaHCO3 consists of one sodium atom (Na), one hydrogen atom (H), one carbon atom (C), and three oxygen atoms (O).
The atomic mass of hydrogen (H) is 1.01 g/mol.
The atomic mass of carbon (C) is 12.01 g/mol.
The atomic mass of oxygen (O) is 16.00 g/mol.
So, the molar mass of NaHCO3 can be calculated as follows:
Molar mass of NaHCO3 = (1 x Na) + (1 x H) + (1 x C) + (3 x O)
= (1 x 22.99) + (1 x 1.01) + (1 x 12.01) + (3 x 16.00)
= 22.99 + 1.01 + 12.01 + 48.00
= 84.01 g/mol
3. Calculating the percentage by mass of sodium (Na):
To find the percentage by mass of sodium in NaHCO3, we need to divide the molar mass of sodium by the molar mass of NaHCO3 and multiply by 100%:
Percentage by mass of Na = (molar mass of Na / molar mass of NaHCO3) x 100%
= (22.99 / 84.01) x 100%
≈ 27.4%
Therefore, the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3) is approximately 27.4%.
To find the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3), you need to know the molar mass of sodium (Na) and the molar mass of sodium hydrogen carbonate (NaHCO3).
To determine the molar mass of sodium (Na), you can refer to the periodic table. The atomic mass of sodium is approximately 22.99 grams/mole (g/mol).
Next, let's calculate the molar mass of sodium hydrogen carbonate (NaHCO3). We need to add up the individual molar masses of its constituent elements - sodium (Na), hydrogen (H), carbon (C), and oxygen (O).
The atomic mass of hydrogen (H) is about 1.01 g/mol, carbon (C) is approximately 12.01 g/mol, and oxygen (O) is roughly 16.00 g/mol.
Now, calculate the molar mass of sodium hydrogen carbonate:
NaHCO3 = (1 x Na) + (1 x H) + (1 x C) + (3 x O)
= 22.99 + 1.01 + 12.01 + (3 x 16.00)
≈ 84.01 g/mol
So, the molar mass of sodium hydrogen carbonate (NaHCO3) is approximately 84.01 g/mol.
To determine the percentage by mass of sodium (Na) in NaHCO3, we need the molar mass of sodium and the molar mass of the entire compound.
The molar mass of sodium (Na) is around 22.99 g/mol.
Now, calculate the percentage by mass of sodium (Na) in NaHCO3:
(Atomic mass of Na / Molar mass of NaHCO3) x 100
= (22.99 g/mol / 84.01 g/mol) x 100
≈ 27.37%
Therefore, the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3) is approximately 27.37%.
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%Na = (atomic mass Na/molar mass NaHCO3)&100 = ?