Question

element mass of atom total # of atoms total mass of atoms o 16 daltons 11 11 x 16 = 176 g/mol h 1 dalton 22 1 x 22 = 22 g/mol c 12 daltons 12 12 x 12 = 144 g/mol in round numbers of daltons, sucrose has a molecular mass of daltons. because we can’t weigh out small numbers of molecules, we usually measure substances in units called moles. just as a dozen always means 12 objects, a mole (mol) represents an exact number of objects: which is called avogadro’s number. because of the way in which avogadro’s number and the unit dalton were originally defined, once we determine the molecular mass of a molecule such as sucrose, we can use the same number, but with the unit gram, to represent the mass of molecules of sucrose, or 1 mol of sucrose (sometimes called the molar mass). (for example, o has a mass of 16. therefore, one mole of o has a mass of 16 x 11 = 176 g/mole.) c. add the masses of each element in the molecule to get the molar mass of sucrose. to obtain 1 mol of sucrose in the lab, therefore, we weigh out ____ g. how would we make a liter (l) of solution consisting of 1 mol of sucrose dissolved in water? we would measure out ____ g of sucrose and then gradually add water, while stirring, until the sugar was completely dissolved. we would then add enough water to bring the total volume of the solution up to 1 l. at that point, we would have a 1 - molar (1 m) solution of sucrose.

Explanation:

Step1: Identify total mass of each element

O: $176$ g/mol, H: $22$ g/mol, C: $144$ g/mol

Step2: Calculate molar mass of sucrose

Add the masses of O, H and C. $176 + 22+144=342$ g/mol

Answer:

$342$