David Marks Staff asked 4 years ago

What is the number of hydrogen atoms

What is the number of hydrogen atoms, glucose molecules, and moles of glucose in a sample of glucose?

Are there any metallic compounds that do not react with acid or base?

What is the history of mercury drug?

After reaching saturation, if the temperature of the room continues to decrease for one more hour, h…

How can the mass of mixture of solids (initial), mass (g), and percentage of total mixture (%) be ca…

What is the number of moles and the mass of Barium peroxide (BaO2) needed to produce 2.500 kg of Bar…

1 Answers
David Marks Staff answered 4 years ago

Each molecule of glucose contains two atoms of hydrogen per one atom of carbon. so the sample contains 2*1.25*1021 = 2.5*1021 atoms of hydrogen
6 atoms of carbon = 1molecule of glucose
1.280*1021 atoms of carbon = X molecules
so the sample contains X = 1.280*1021/6 = 0.208*1021 molecules of glucose
1 mole of glucose =6.022*1023 molecules
n moles of glucose = 0.208*1021 molecules
so, the sample contains n = 0.208*1021/6.022*1023 =3.45*104 moles of glucose
m = M*n where M is the molar mass of glucose (180g/mol), n -moles
so the mass of sample, m = 180*3.45*104 = 0.62g