1. How many grams are contained in 2.00 mol of neon atoms 2. Calculate the numbe

Question

1. How many grams are contained in 2.00 mol of neon atoms
2. Calculate the number of moles of sulfur represented by 1.81x10 24exponent atoms of sulfur
3. 3.4x10-5exponent moles of Na2co3 to grams 1. How many grams are contained in 2.00 mol of neon atoms
2. Calculate the number of moles of sulfur represented by 1.81x10 24exponent atoms of sulfur
3. 3.4x10-5exponent moles of Na2co3 to grams
2. Calculate the number of moles of sulfur represented by 1.81x10 24exponent atoms of sulfur
3. 3.4x10-5exponent moles of Na2co3 to grams

Explanation / Answer

1)

Given

No. of moles = 2 mol

Molar mass of Neon = 20 g/mol

mass of Neon = No. of moles * Molar mass of Neon = 2 mol * 20 g/mol = 40 g/mol

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2)

Given

No. of atoms of sulfur = 1.81 * 1024 atoms

No. of moles of sulfur = No. of atoms of sulfur / avagadro number = 1.81 * 1024 atoms / 6.023 * 1023 = 3 moles

No. of moles of sulfur = 3 moles

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3)

Given

No. of moles of Na2CO3 = 3.4 * 10-5 moles

Molar mass of Na2CO3 = 106 g/mol

Mass of Na2CO3 = 3.4 * 10-5 moles * 106 g/mol = 3.71 * 10-3 g answer

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