nay5049 nay5049

01-02-2021
Chemistry

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Calculate the number of sucrose molecules in a 75.0 gram sample.

Calculate the number of sucrose molecules in a 750 gram sample class=

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santashelperkim santashelperkim

01-02-2021

Answer:

1.32*10^23 molecules

Explanation:

sucrose formula: C12H22O11

molar mass: 12(12.01)+22(1.01)+11(16.00)=342.34g/mol

75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11

0.219 mol * (6.022*10^23)/mol = 1.32*10^23 molecules (three sig. figures)

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