Question

a glass of juice contains 9gm of glucose. how many atoms of each kind are there in the glass ​

Answer 1

Step One

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Find the molar mass of glucose (C6H12O6)

C6 = 6 * 12 = 72

H12 = 12 * 1 = 12

O6 = 6 * 16 = 96

Total = 180 grams.

Step 2

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find the moles of Glucose

n = given mass / molar mass

n = 18/180

n = 0.1 moles

Step Three

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Find the number of Carbon atoms

1 mole of glucose contains 6.02 * 10 ^23 molecules of glucose

1 molecule of glucose contains 6 atoms of Carbon

Therefore 6.02*10^23 molecules of glucose contains 6.02 * 10^23 * 6 atoms or 3.612 *10^24 atoms of carbon.

Step 4

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Find the number of atoms of carbon in 0.1 mole

3.612 * 10^24 * 0.1 = 3.612 * 10^23

Answer 2

molar mass of glucose (C6H12O6)

C6 = 6 * 12 = 72

H12 = 12 * 1 = 12

O6 = 6 * 16 = 96

Total = 180 grams.

n = given mass / molar mass

n = 18/180

n = 0.1 moles

1 mole of glucose contains 6.02 * 10 ^23 molecules of glucose

1 molecule of glucose contains 6 atoms of Carbon

Therefore 6.02*10^23 molecules of glucose contains 6.02 * 10^23 * 6 atoms or 3.612 *10^24 atoms of carbon.

3.612 * 10^24 * 0.1 = 3.612 * 10^23