The mass percent of Na in Na;CO3 isa) 21.7 b)43.4 c) 10.8 d) 5.4
Question
The mass percent of Na in Na;CO3 isa) 21.7 b)43.4 c) 10.8 d) 5.4
Solution
To find the mass percent of an element in a compound, you need to know the molar mass of the element and the molar mass of the compound.
Step 1: Find the molar mass of Na (Sodium) and Na2CO3 (Sodium carbonate).
The molar mass of Sodium (Na) is approximately 23 g/mol.
The molar mass of Sodium carbonate (Na2CO3) is calculated as follows: (223 [for 2 Na]) + 12 [for C] + (316 [for 3 O]) = 46 + 12 + 48 = 106 g/mol.
Step 2: Calculate the mass percent of Sodium (Na) in Sodium carbonate (Na2CO3).
The formula to calculate the mass percent is: (Mass of element/Molar mass of compound) * 100%
So, the mass percent of Sodium in Sodium carbonate is: (46/106)*100% = 43.4%
So, the correct answer is b) 43.4%.
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