Question

Consider a 1.245 g sample of glucose (C₆H₁₂O₆). Calculate the moles of glucose in the sample.

Answer 1

The number of moles can be calculated using the following equation:

n = m / Mr

where n - number of moles, m - mass, Mr - molecular weight.

From here:

n(C₆H₁₂O₆) = m(C₆H₁₂O₆) / Mr(C₆H₁₂O₆) = 1.245 g / 180.156 g/mol = 0.007 mol

Answer: 0.007 mol