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Answer :
Final answer:
To calculate the number of moles of NaOH in 35.8 g, first find the molar mass of NaOH (40.00 g/mol), then divide the mass of NaOH by its molar mass, yielding approximately 0.895 moles of NaOH.
Explanation:
The question asks how many moles of NaOH are present in 35.8 g of the compound. To calculate this, we need to:
- Calculate the molar mass of NaOH.
- Convert the given mass of NaOH to moles using the molar mass.
To find the molar mass of NaOH, we sum up the atomic masses of sodium (Na), oxygen (O), and hydrogen (H):
1x22.990 g.mol−¹ Na + 1x15.999 g.mol−¹ O + 1x1.008 g.mol−¹ H = 39.997 g.mol−¹ NaOH, which we can round to 40.00 g.mol−¹.
Next, we will use this molar mass to convert the mass of NaOH to moles:
Number of moles = Mass of NaOH / Molar mass of NaOH
= 35.8 g / 40.00 g.mol−¹
= 0.895 moles of NaOH
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